Página 1 dos resultados de 89 itens digitais encontrados em 0.005 segundos

Contribution to assessing the stiffness reduction of structural elements in the global stability analysis of precast concrete multi-storey buildings; Contribuição para a avaliação da redução da rigidez de elementos estruturais de concreto pré-moldado de edifícios de múltiplos pavimentos para análise da estabilidade global

Marin, M. C.; El Debs, Mounir Khalil
Fonte: IBRACON - Instituto Brasileiro do Concreto Publicador: IBRACON - Instituto Brasileiro do Concreto
Tipo: Artigo de Revista Científica
ENG
Relevância na Pesquisa
46.32%
This study deals with the reduction of the stiffness in precast concrete structural elements of multi-storey buildings to analyze global stability. Having reviewed the technical literature, this paper present indications of stiffness reduction in different codes, standards, and recommendations and compare these to the values found in the present study. The structural model analyzed in this study was constructed with finite elements using ANSYS® software. Physical Non-Linearity (PNL) was considered in relation to the diagrams M x N x 1/r, and Geometric Non-Linearity (GNL) was calculated following the Newton-Raphson method. Using a typical precast concrete structure with multiple floors and a semi-rigid beam-to-column connection, expressions for a stiffness reduction coefficient are presented. The main conclusions of the study are as follows: the reduction coefficients obtained from the diagram M x N x 1/r differ from standards that use a simplified consideration of PNL; the stiffness reduction coefficient for columns in the arrangements analyzed were approximately 0.5 to 0.6; and the variation of values found for stiffness reduction coefficient in concrete beams, which were subjected to the effects of creep with linear coefficients from 0 to 3...

Contribuição ao projeto de estruturas multi-piso reticuladas em concreto pré-moldado; Contribution to the design of precast concrete multi-storey structures

Mota, Joaquim Eduardo
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Tese de Doutorado Formato: application/pdf
Publicado em 21/10/2009 PT
Relevância na Pesquisa
66.59%
Estruturas em concreto pré-moldado vêm sendo utilizadas com freqüência em sistemas reticulados do tipo multi-piso, destinados às mais variadas atividades como: estabelecimentos comerciais, estacionamentos, escolas, hospitais e etc. A utilização de ligações viga-pilar do tipo semi-rígida constitui uma alternativa interessante para o enrijecimento e para a garantia da estabilidade global deste tipo de estrutura. Atualmente, a rigidez e a resistência destas ligações têm sido determinadas por ensaios de modelos em escala real. Estes ensaios, além de apresentarem um custo elevado, têm aplicação restrita à ligação examinada o que torna esta metodologia limitada e não adequada à prática de elaboração de projeto. Apresenta-se, neste trabalho, um modelo mecânico para determinação numérica da relação força-deslocamento de uma ligação viga-pilar semi-rígida a partir da contribuição da rigidez individual de cada componente de transferência de força utilizado na vinculação. A formulação do equilíbrio do modelo é implementada em planilha eletrônica constituindo-se numa ferramenta de cálculo para o projetista, permitindo o estudo, de forma rápida e amigável, da influência do posicionamento e da rigidez individual de cada componente de transferência de força na rigidez e na resistência da ligação. Este modelo mecânico foi utilizado para o cálculo da rigidez à rotação para momento fletor positivo de uma ligação viga-pilar ensaiada em laboratório. Os valores para a rigidez da ligação obtidos em ensaio e pelo modelo mecânico ficaram muito próximos. Da formulação do equilíbrio do modelo mecânico pode-se extrair ainda uma matriz de rigidez que é utilizada na representação da ligação semi-rígida no modelo de barra da estrutura. Um programa computacional foi desenvolvido para a análise de pórticos planos com ligação viga-pilar semi-rígida considerando ainda as não linearidades físicas e geométricas do modelo de cálculo. O programa foi validado pela comparação de resultados de exemplos também processados no programa ANSYS. A não-linearidade geométrica é considerada pelo método modal...

Contribuição à análise da estabilidade global de estruturas em concreto pré-moldado de múltiplos pavimentos; Contribution in the analysis of global stability of multi-storey precast concrete framed structures

Marin, Marcelo Cuadrado
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 04/12/2009 PT
Relevância na Pesquisa
46.51%
No presente trabalho são avaliados os principais parâmetros de projeto na análise da estabilidade global de estruturas em concreto pré-moldado de múltiplos pavimentos, considerando a não-linearidade física (NLF), não-linearidade geométrica (NLG) e ligações semi-rígidas. Os sistemas estruturais analisados são constituídos por pórticos com ligação viga-pilar semi-rígida e pilares engastados na fundação. As ligações viga-pilar têm sua tipologia definida por chumbadores retos e capa de concreto moldado in loco com armadura de continuidade. A NLF é avaliada segundo a construção dos diagramas M x N x 1/r, onde foi considerado de forma consistente o efeito da força normal, da armadura passiva, da armadura ativa e a reologia do concreto. São propostas funções e definidos coeficientes redutores de rigidez que foram comparados com valores apontados em expressões normativas que contemplam de forma aproximada a NLF. A NLG é avaliada com o auxílio do programa ANSYS e na forma aproximada segundo o coeficiente z e o método da carga lateral fictícia (P-). Apresentam-se modelos analíticos de caracterização de rigidez e resistência de ligações viga-pilar ao momento fletor negativo e positivo. Na análise numérica é feito um estudo de caso completo de uma estrutura típica de múltiplos pavimentos em concreto pré-moldado com o auxílio do programa ANSYS...

Contribuição ao estudo da estabilidade de edifícios de andares múltiplos em aço; Contribution to the study of stability of steel multi-storey buildings

Camargo, Rafael Eclache Moreira de
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 20/08/2012 PT
Relevância na Pesquisa
36.2%
Este trabalho apresenta uma análise comparativa de diferentes sistemas estruturais para um edifício de 20 pavimentos. Cada um dos modelos foi dimensionado através dos princípios do método da análise direta, presente na ABNT NBR 8800:2008. O método da amplificação dos esforços solicitantes (MAES) foi usado para se obter de forma simplificada os esforços atuantes nos elementos do edifício considerando os efeitos locais e globais de segunda ordem. A incidência do vento foi simulada de duas formas diferentes. Na primeira, chamada de uniforme, o vento foi aplicado sem excentricidade, gerando apenas o efeito de tombamento nas estruturas. Na segunda hipótese, considerou-se uma excentricidade devida aos efeitos de vizinhança, prescrita pela ABNT NBR 6123:1988, responsável por ocasionar o tombamento e a torção dos edifícios. Todas as análises numéricas foram repetidas fazendo o uso de outro método simplificado de segunda ordem, conhecido como P-Delta. Por meio dos resultados obtidos, constatou-se que a possibilidade de se reduzir a sobrecarga para o dimensionamento de pilares proporciona uma economia de material, mas, por outro lado, tem como consequência o aumento do tempo de análise, pois exige a utilização de diferentes combinações de cálculo para o dimensionamento de vigas e pilares. A estratégia utilizada para simular os efeitos de vizinhança mostrou-se satisfatória...

Método para estimar custos diretos da execução de edifícios: aplicação à alvenaria estrutural.; Method to forecast direct costs for multi-storey building construction: tested for structural mansonry.

Kato, Camila Seiço
Fonte: Biblioteca Digitais de Teses e Dissertações da USP Publicador: Biblioteca Digitais de Teses e Dissertações da USP
Tipo: Dissertação de Mestrado Formato: application/pdf
Publicado em 09/11/2012 PT
Relevância na Pesquisa
46.32%
O trabalho de mestrado propõe um método para estimar custos diretos de edificações, através da análise de fatores que comparam o edifício a ter o custo prognosticado com outro tomado como referência. Esta ferramenta é muito útil na medida em que a análise de custos durante estágios iniciais do empreendimento auxilia as empresas de Construção Civil a tomar decisões importantes, tais como a compra do terreno, o lançamento do empreendimento, a escolha da concepção arquitetônica da edificação, entre outras. O método utilizado para a elaboração desta ferramenta foi a modelagem, pois utilizou-se de análises paramétricas para descrever o funcionamento do prognóstico de custos. A simulação da ferramenta desenvolvida foi feita para o serviço de alvenaria estrutural, e envolveu levantamento bibliográfico para conhecer e quantificar os aspectos técnicos e arquitetônicos que influenciam o custo deste serviço. O método proposto, apesar de ter um desenvolvimento complexo, possui vantagens em relação a outros estudados na revisão bibliográfica, tais como: precisão, rapidez na utilização em alvenaria estrutural, entendimento de fatores influenciadores, possibilidade de atualização do método, utilização por diferentes empresas...

Seismic analysis of a 2-storey log house

Branco, Jorge M.; Lourenço, Paulo B.; Aranha, C.
Fonte: Trans Tech Publications Publicador: Trans Tech Publications
Tipo: Artigo de Revista Científica
Publicado em //2013 ENG
Relevância na Pesquisa
36.4%
The current paper deals with the analysis of the results yielded by a series of tests performed to evaluate the seismic behaviour of a model log construction. The study was based on an experimental investigation performed to improve the existing knowledge on log houses subject to seismic events. The main part of the experimental work is based on a full scale shaking table test, conducted on a two-storey log house designed by the Portuguese company Rusticasa® in compliance with design rules for timber buildings. The test was performed by the University of Minho within the framework of the SERIES Project ‘Multi-storey timber buildings’ and was coordinated by the University of Trento, at LNEC, Lisbon, Portugal. The geometry of the specimen, the design of the test, the setup and the instrumentation layout are first presented in this paper. The test procedure was conducted in stages with maximum accelerations (bi-directional) of 0.07g, 0.28g and 0.5g. The experimental results of each test have been analyzed and the resultant values of inter-storey drift, wall slippage and uplift measurements, shear deformations and hold-down forces measured are presented. Most importantly, the dynamic properties (fundamental period and mode shapes) of the system have been determined.

Non-linear FEM analysis of seismic induced pounding between neighbouring multi-storey structures

Jameel,Mohammed; Islam,A.B.M. Saiful; Hussain,Raja Rizwan; Hasan,Syed Danish; Khaleel,M.
Fonte: Associação Brasileira de Ciências Mecânicas Publicador: Associação Brasileira de Ciências Mecânicas
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/09/2013 EN
Relevância na Pesquisa
36.32%
Pounding of neighbouring construction of structures due to seismic excitation increases the damage of structural components or even causes collapse of structures. Among the possible building damages, earthquake induced pounding has been commonly observed in several earthquakes. Therefore it is imperative to consider pounding effect for structures. This study aims to understand the response behaviour of adjacent buildings with dissimilar heights under earthquake induced pounding. Effects of different separation distances between structures are also investigated. Nonlinear finite element analysis in time domain has been carried out for pounding of neighbouring structures having varying heights. To show the importance of avoiding pounding in structures the results obtained were compared with model having no pounding phenomena. The results were obtained in the form of storey shear, pounding force, storey drift, point displacement and acceleration. The acceleration at pounding level significantly increases during collision of building. The generated extra pounding force may cause severe damage to structural members of structures. Pounding produces shear at various story levels, which are greater than those obtained from no pounding case. Building with more height suffers greater damage than shorter building when pounding occurs. Increasing gap distance tends to reduce story shear in consistent manner. The results also show that the conventional modelling of building considering only beams and columns underestimates pounding effects. More realistic modelling such as beams...

Contribution to assessing the stiffness reduction of structural elements in the global stability analysis of precast concrete multi-storey buildings

Marin,M. C.; El Debs,M. K.
Fonte: IBRACON - Instituto Brasileiro do Concreto Publicador: IBRACON - Instituto Brasileiro do Concreto
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2012 EN
Relevância na Pesquisa
46.32%
This study deals with the reduction of the stiffness in precast concrete structural elements of multi-storey buildings to analyze global stability. Having reviewed the technical literature, this paper present indications of stiffness reduction in different codes, standards, and recommendations and compare these to the values found in the present study. The structural model analyzed in this study was constructed with finite elements using ANSYS® software. Physical Non-Linearity (PNL) was considered in relation to the diagrams M x N x 1/r, and Geometric Non-Linearity (GNL) was calculated following the Newton-Raphson method. Using a typical precast concrete structure with multiple floors and a semi-rigid beam-to-column connection, expressions for a stiffness reduction coefficient are presented. The main conclusions of the study are as follows: the reduction coefficients obtained from the diagram M x N x 1/r differ from standards that use a simplified consideration of PNL; the stiffness reduction coefficient for columns in the arrangements analyzed were approximately 0.5 to 0.6; and the variation of values found for stiffness reduction coefficient in concrete beams, which were subjected to the effects of creep with linear coefficients from 0 to 3...

Nitric oxide‐mediated dispersal in single‐ and multi‐species biofilms of clinically and industrially relevant microorganisms

Barraud, Nicolas; Storey, Michael V.; Moore, Zoe P.; Webb, Jeremy S.; Rice, Scott A.; Kjelleberg, Staffan
Fonte: Blackwell Publishing Ltd Publicador: Blackwell Publishing Ltd
Tipo: Artigo de Revista Científica
EN
Relevância na Pesquisa
36.14%
Strategies to induce biofilm dispersal are of interest due to their potential to prevent biofilm formation and biofilm‐related infections. Nitric oxide (NO), an important messenger molecule in biological systems, was previously identified as a signal for dispersal in biofilms of the model organism Pseudomonas aeruginosa. In the present study, the use of NO as an anti‐biofilm agent more broadly was assessed. Various NO donors, at concentrations estimated to generate NO levels in the picomolar and low nanomolar range, were tested on single‐species biofilms of relevant microorganisms and on multi‐species biofilms from water distribution and treatment systems. Nitric oxide‐induced dispersal was observed in all biofilms assessed, and the average reduction of total biofilm surface was 63%. Moreover, biofilms exposed to low doses of NO were more susceptible to antimicrobial treatments than untreated biofilms. For example, the efficacy of conventional chlorine treatments at removing multi‐species biofilms from water systems was increased by 20‐fold in biofilms treated with NO compared with untreated biofilms. These data suggest that combined treatments with NO may allow for novel and improved strategies to control biofilms and have widespread applications in many environmental...

A case study of partially pre-stressed multi-storey building incorporating fast-track construction

Vincent, T.; Ozbakkaloglu, T.; Seracino, R.
Fonte: Engineers Media Pty Ltd Publicador: Engineers Media Pty Ltd
Tipo: Artigo de Revista Científica
Publicado em //2010 EN
Relevância na Pesquisa
46.32%
T. Vincent and T. Ozbakkaloglu, R. Seracino

Seismic Design Criteria for Multi-storey Precast Structures

BIONDINI Fabio; TONIOLO Giandomenico; TSIONIS Georgios
Fonte: International Association for Earthquake Engineering Publicador: International Association for Earthquake Engineering
Tipo: Contributions to Conferences Formato: CD-ROM
ENG
Relevância na Pesquisa
46.51%
This paper presents a simplified method for the capacity design of multi-storey precast concrete frames with hinged beams. A parametric study shows that in the field of ordinary and less flexible structures, the proposed simplified method can be applied with full reliability, in the same way as prescribed by the seismic codes for monolithic cast-in-situ structures. Moreover, the displacement ductility capacity of a range of multi-storey precast concrete structures designed according to the proposed method is investigated.; JRC.G.5-European laboratory for structural assessment

Capacity design and seismic performance of multi-storey precast structures

BIONDINI Fabio; TONIOLO Giandomenico; TSIONIS Georgios
Fonte: Lavoisier Publicador: Lavoisier
Tipo: Articles in Journals Formato: Printed
ENG
Relevância na Pesquisa
46.63%
The seismic design of multi-storey precast structures is at present not covered by specific provisions of the European seismic codes. To fill such gap, capacity design criteria for multi-storey precast concrete frames with hinged beams are presented. Based on the same approach prescribed by the codes for monolithic cast-in-situ frames, a distribution of floor forces and a value of behaviour factor are assumed to perform a static linear analysis of the structure. A parametric study aimed to validate the design method is carried out by varying, within the range of practical interest, the main design parameters such as the number of storeys, the mass-over-stiffness ratios and the stiffness characteristics of the columns. The results of dynamic modal analyses and non linear static analyses show that the proposed method can safely be applied to ordinary multi-storey concrete precast frames characterized by structural regularity and limited flexibility.; JRC.DG.G.5-European laboratory for structural assessment

Pseudodynamic tests on a full-scale 3-storey precast concrete building:Behavior of the mechanical connections and floor diaphragms

BOURNAS DIONYSIOS; NEGRO Paolo; MOLINA RUIZ Francisco Javier
Fonte: ELSEVIER SCI LTD Publicador: ELSEVIER SCI LTD
Tipo: Articles in Journals Formato: Printed
ENG
Relevância na Pesquisa
36.32%
A full-scale three-storey precast building was tested under seismic conditions at the European Laboratory for Structural Assessment in the framework of the SAFECAST project. The unique research opportunity of testing a complete structural system was exploited to the maximum extent by subjecting the structure to a series of pseudodynamic (PsD) tests and by using four different structural layouts of the same mock-up, while 160 sensors were used to monitor the global and local response of each layout. Dry mechanical connections were adopted to realize the joints between: floor-to-floor, floor-to-beam, wall-to-structure; column (and wall)-to-foundation and beam-to-column. Particular emphasis was given in the seismic behaviour of mechanical beam-column connections, as well as in the response of floor diaphragms. Thus, the in-plane rigidity of three pretopped diaphragms with or without openings was assessed. In addition, two types of beam-to-column connections were investigated experimentally, namely hinged beam-column connections by means of dowel bar and emulative beam-column joints by means of dry innovative mechanical connections. Therefore, the seismic behaviour of floor diaphragms and pinned beam-column connections in a multi-storey precast building was addressed experimentally. The results demonstrated that the proposed new beam-to-column connection system is a viable solution toward enhancing the response of precast RC frames subjected to seismic loads...

Pseudo-Dynamic Tests on a Full-Scale Four-Storey Reinforced Concrete Frame Seismically Retrofitted with Reinforced Concrete Infilling

CHRYSOSTOMOU Christis Z.; POLJANSEK Martin; KYRIAKIDES Nicholas; TAUCER Fabio; MOLINA RUIZ Francisco Javier
Fonte: IABSE Publicador: IABSE
Tipo: Articles in Journals Formato: Online
ENG
Relevância na Pesquisa
36.45%
The effectiveness of seismic retrofitting of multi-storey multi-bay RC-frame buildings by converting selected bays into new walls through infilling with reinforced concrete (RC) was studied experimentally at the ELSA facility of the Joint Research Centre in Ispra (Italy). A fullscale model was tested with the pseudo-dynamic method and consisted of two four-storey (12m tall) three-bay (8.5m long) parallel frames linked through 0.15m slabs with the central bay (2.5m) infilled with a RC wall. The frames were designed and detailed for gravity loads only and are typical of similar frames built in Cyprus in the 1970’s. Different connection details and reinforcement percentages for the two infilled frames were used in order to study their effects in determining structural response. The results of the pseudo-dynamic and cyclic tests performed on the specimen and their analytical simulation are presented, and conclusions are drawn; JRC.G.4-European laboratory for structural assessment

La aportación estructural del Crystal Palace de la Exposición Universal de Londres 1851. Una ampliación del enfoque histórico tradicional.

López César, Isaac
Fonte: Redfundamentos Publicador: Redfundamentos
Tipo: Artigo de Revista Científica
SPA
Relevância na Pesquisa
26.51%
[Resumen] El objetivo del presente artículo es el de establecer la línea histórica que conduce desde la aplicación arquitectónica de los primeros elementos estructurales de hierro industrializado en edificios de varias plantas y cubiertas hasta la aplicación primigenia del pórtico rígido autoportante en un edificio de varias plantas. En este recorrido, el Crystal Palace de la Exposición Universal de Londres 1851 se revela como un elemento clave que articula la transición desde la tipología de entramado metálico estabilizado por muros perimetrales de fábrica hasta la moderna formalización del pórtico rígido autoestable aplicado al edificio en altura. Asimismo, se detectan las conexiones históricas existentes en dicho proceso, poniendo en valor edificios que han permanecido al margen de la historiografía arquitectónica convencional. Ampliamos, por tanto, el foco histórico centrado tradicionalmente en los logros de la Escuela de Chicago destacando y conectando históricamente los acontecimientos anteriores.; [Abstract] The aim of this paper is to establish a historical line from the first architectural application of structural elements made of industrial iron for roofs and multi-storey buildings to the first application of portal frame in a multi-storey building. With this in mind...

Seismic assessment of out-of-plane loaded unreinforced masonry walls in multi-storey buildings

Derakhshan, H.; Dizhur, D.Y.; Griffith, M.C.; Ingham, J.M.
Fonte: New Zealand Society for Earthquake Engineering Publicador: New Zealand Society for Earthquake Engineering
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
46.32%
A procedure is proposed to evaluate the dynamic out-of-plane stability of cracked unreinforced masonry (URM) walls located in multi-storey URM buildings. The equations of dynamic motion are derived from first principles and representative single-degree-of-freedom (SDOF) models are proposed. The models have nonlinear stiffness properties that correspond to the restoring gravitational forces. A method is suggested to transform the nonlinear problem to a corresponding linear equivalent so that conventional spectral methods can be used to calculate wall response. The dynamic interaction between the URM building as the main structural system and the out-of-plane loaded walls as secondary elements is addressed by developing floor response spectra. Several buildings were assumed in a parametric study and subjected to code-compatible ground motion records. The absolute acceleration response at floor levels was calculated and the response spectra for that modified acceleration were subsequently obtained. The results from the study suggest that modifications should be made to the equations proposed for the Parts response spectra in the New Zealand seismic loading standard, NZS 1170.5:2004, in order to calculate the spectral response of out-of-plane loaded URM walls. Several worked examples are presented to demonstrate application of the procedure.; Hossein Derakhshan...

Factors influencing the retrofitting of existing office buildings using Adelaide, South Australia as a case study

Bruce, T.; Zuo, J.; Rameezdeen, R.; Pullen, S.
Fonte: Emerald Group Publishing Publicador: Emerald Group Publishing
Tipo: Artigo de Revista Científica
Publicado em //2015 EN
Relevância na Pesquisa
46.51%
Purpose – The purpose of this paper is to explore the barriers preventing investment in the re-use of low-grade multi-storey building stock in order to identify attributes that determine whether an existing building is suitable for retrofitting. Design/methodology/approach – Semi-structured interviews were undertaken with key industry practitioners to investigate existing practices and barriers facing low-grade building retrofits and what “ideal” multi-storey building features represent a successful investment opportunity. Findings – The findings showed that tenant commitment is necessary before any project goes ahead and that there exist many barriers influencing the investment decision. These include: high levels of asbestos found in existing buildings; changes in the National Construction Code necessitating enhanced fire safety and disability access; heritage listing; lack of awareness; overestimation of costs involved on simple and effective energy efficiency upgrades and change in tenant demands towards modern and efficient open plan offices. Many low-grade structures are privately owned inherited assets where the owners lack the expertise and capital to undertake retrofitting effectively. Research limitations/implications – The study is focused on the Adelaide CBD in South Australia but the findings are relevant to other Australian cities. Practical implications – There is room in the market for more positive and influential schemes such as the Green Building Fund that encourage more energy efficiency upgrading of these buildings. Social implications – The greater occurrence of retrofitting and re-use of older buildings...

Perceived obstacles to multi-storey timber-frame construction: an Australian study

Xia, B.; O'Neill, T.; Zuo, J.; Skitmore, M.; Chen, Q.
Fonte: Taylor & Francis Publicador: Taylor & Francis
Tipo: Artigo de Revista Científica
Publicado em //2014 EN
Relevância na Pesquisa
66.7%
The contemporary default materials for multi-storey buildings – namely concrete and steel – are all significant generators of carbon and the use of timber products provides a technically, economically and environmentally viable alternative. In particular, timber's sustainability can drive increased use and subsequent evolution of the Blue economy as a new economic model. National research to date, however, indicates a resistance to the uptake of timber technologies in Australia. To investigate this further, a preliminary study involving a convenience sample of 15 experts was conducted to identify the main barriers involved in the use of timber frames in multi-storey buildings. A closed-ended questionnaire survey involving 74 experienced construction industry participants was then undertaken to rate the relative importance of the barriers. The survey confirmed the most significant barriers to be a perceived increase in maintenance costs and fire risk, together with a limited awareness of the emerging timber technologies available. It is expected that the results will benefit government and the timber industry, contributing to environmental improvement by developing strategies to increase the use of timber technologies in multi-storey buildings by countering perceived barriers in the Australian context.; Bo Xia...

High rise hope: the social implications of energy efficiency retrofit in large multi-storey tower blocks

Bates, Katie; Lane, Laura; Power, Anne
Fonte: Centre for Analysis of Social Exclusion, The London School of Economics and Political Science Publicador: Centre for Analysis of Social Exclusion, The London School of Economics and Political Science
Tipo: Monograph; NonPeerReviewed Formato: application/pdf
Publicado em /10/2012 EN; EN
Relevância na Pesquisa
36.08%
A report, into the social effects of energy efficiency measures in large multi-dwelling occupancies, funded by Rockwool , using the Edward Woods Estate in the London Borough of Hammersmith and Fulham as a case study

The issue of personal safety on dolomite: a probability-based evaluation with respect to single-storey residential houses

Kirsten,H A D; Heath,G J; Venter,I S; Trollip,N Y G; Oosthuizen,A C
Fonte: Journal of the South African Institution of Civil Engineering Publicador: Journal of the South African Institution of Civil Engineering
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2009 EN
Relevância na Pesquisa
36.4%
In refining the principles supporting the safe and judicious use of land, the Council for Geoscience (CGS) is researching the use of a risk-based evaluation of the influence of development density on personal safety. This paper considers single-storey dwelling houses and is the first in a series that will also consider multi-storey and mixed-use developments. In much the same way that rainfall statistics are used to calculate flood events in order to control development by restricting it to above a fixed return period flood line, is it proposed to expand and apply the frequencies of sinkhole occurrence in order to arrive at a more rigorous expression of acceptable development densities for the eight "Inherent Risk Classes". A number of probability concepts are used in determining the development density. Depending on the incidence of each probability, it has been possible to determine the risk associated with development on dolomite for a single-storey dwelling. Recommended population densities are proposed for each Inherent Risk Class, with the exceptions of Risk Classes 6, 7 and 8, where no residential development is catered for, in line with industry standards.