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The Building and Construction Authority is a statutory board under the Ministry of National Development of the Singapore Government. It was established on 1 April 1999 through the merger of the Construction Industry Development Board and the Building Control Division of the former Public Works Department.The primary role of BCA is to develop and regulate Singapore's building and construction industry. BCA champions the development of an excellent built environment for Singapore. Its mission is to shape a safe, high quality, sustainable and friendly built environment. Wikipedia.

Wong N.H.,National University of Singapore | Kwang Tan A.Y.,National University of Singapore | Tan P.Y.,National Parks Board | Chiang K.,National Parks Board | Wong N.C.,Building and Construction Authority Academy
Building and Environment | Year: 2010

After decades of fast growth, the scarcity of land in cities causes many buildings to be constructed very close to expressways, exposing occupants to serious noise pollution. In recent years, sustainable cities have found that greenery is a key element in addressing this noise pollution, giving rise to the popularity of vertical greenery systems (VGS). This research has two objectives. The first involves the study of eight different vertical greenery systems installed in HortPark, Singapore to evaluate their acoustics impacts on the insertion loss of building walls. Experiment shows a stronger attenuation at low to middle frequencies due to the absorbing effect of substrate while a smaller attenuation is observed at high frequencies due to scattering from greenery. Generally, VGS 2, 7 and 8 exhibit relatively better insertion loss. The second objective aims to determine the sound absorption coefficient of the vertical greenery system constructed in the reverberation chamber which is found to have one of the highest values compared with other building materials and furnishings. Furthermore, as frequencies increases, the sound absorption coefficient increases. In addition, it is observed that the sound absorption coefficient increases with greater greenery coverage. © 2009 Elsevier Ltd. All rights reserved.

Wong N.H.,National University of Singapore | Kwang Tan A.Y.,National University of Singapore | Chen Y.,National University of Singapore | Sekar K.,National University of Singapore | And 4 more authors.
Building and Environment | Year: 2010

This research involves the study of 8 different vertical greenery systems (VGSs) installed in HortPark to evaluate the thermal impacts on the performance of buildings and their immediate environment based on the surface and ambient temperatures. VGSs 3 and 4 have the best cooling efficiency according to the maximum temperature reduction of the wall and substrate surfaces. These results point to the potential thermal benefits of vertical greenery systems in reducing the surface temperature of buildings facades in the tropical climate, leading to a reduction in the cooling load and energy cost. In terms of the lowest diurnal range of average wall surface temperature fluctuation, VGSs 4 and 1 show the highest capacities. No vertical greenery system performs well in term of the diurnal range of average substrate temperature fluctuation. By limiting the diurnal fluctuation of wall surface temperatures, the lifespan of building facades is prolonged, slowing down wear and tear as well as savings in maintenance cost and the replacement of façade parts. The effects of vertical greenery systems on ambient temperature are found to depend on specific vertical greenery systems. VGS 2 has hardly any effect on the ambient temperature while the effects of VGS 4 are felt as far as 0.60 m away. Given the preponderance of wall facades in the built environment, the use of vertical greenery systems to cool the ambient temperature in building canyons is promising. Furthermore, air intakes of air-conditioning at a cooler ambient temperature translate into saving in energy cooling load. © 2009 Elsevier Ltd. All rights reserved.

Li B.,Nanyang Technological University | Leong C.L.,Building and Construction Authority Academy
Journal of Structural Engineering (United States) | Year: 2015

This paper presents the experimental findings of high-strength concrete (HSC) interior beam-column joints under column axial compressive loading. Eight full-scale interior beam-column joints with varying degrees of reinforcement detailing were subjected to a constant column axial compressive load and quasi-static horizontal cyclic load. The test revealed that HSC improved the bond condition of bars with a larger diameter due to the higher achievable bond stress, thereby allowing for the use of longitudinal beams of a larger diameter. Parametric studies via finite-element (FE) modeling were performed to study the influence of various parameters on the strength and bond of HSC beam-column joints. The study confirmed that reinforcement of larger diameter can be used in HSC beams with the improvement in the bond condition. The presence of axial compressive load improved the bond stress of HSC beam-column joint but a threshold limit should be applied. Last, two standards were reviewed and improvements to the design equations were proposed. © 2014 American Society of Civil Engineers.

Leong T.K.,Building and Construction Authority Academy | Huat C.S.,University of Nottingham Malaysia Campus
Procedia Engineering | Year: 2013

This abstract forms Part 1 of 4 of full report on research work: "Bearing and settlement behaviour of piled-raft in soft clay." The convention approach on piled-raft design tends to ignore load bearing and settlement contribution from the raft slab. Thus, selecting an effective raft size taking into effect of the soil-structure interaction environment is often neglected and this resulted with conservative design, expensive piled-raft foundation structure, depleting of resources and ineffective construction - in all, expensive and non-sustainable work This report evaluates on the conventional design approach, problems and limitations faced and propose possible alternative design approach to derive an optimum raft size which are both effective and practical based on the load bearing and settlement criteria. The model would then be used on piled-raft foundation in the next phase of research work to study any significance contribution from the raft and it level of contribution through similar parametrics. Analyses work and charts done would be used to support the selection of the most efficiency raft size model through the use of FEM geotechnical software in both short and long terms design consideration with structure founded on homogeneous normal consolidated soft clay overlaying a thickness of firm clay soil strata. As such, all presentations in this paper would only be encompassing solely on unpiled-raft foundation design under undrained condition since clay soil is expected to consolidate with times and gets firmer and stronger in long term. A sustainable design chart together with self-explained flowchart to serve as quick-reference design guide is developed for completeness. © 2013 The Authors.

Chew K.C.,Building and Construction Authority Academy
IES Journal Part A: Civil and Structural Engineering | Year: 2010

Sustainable construction is critical to Singapore's national development as Singapore has little natural resources. Nearly, all construction materials have to be imported and it is therefore vital to improve Singapore's efficiency on the use of natural resources. Since 2007, the Building and Construction Authority (BCA), together with Singapore's construction industry, strives to promote the adoption of sustainable construction materials and practices. Central to the drive of sustainable construction is the Sustainable Construction Masterplan, with five major strategic thrusts outlining strategies to achieve resource efficiency. The five strategic thrusts cover initiatives from government support, legislation to research and development support. This article also presents some recent initiatives of sustainable construction, such as the development of demolition protocol and sustainable construction capability development fund. The findings of a recently completed full-scale study on the use of recycled concrete aggregates in structural elements of a 3-storey office building are also presented. © 2010 Building & Construction Authority.

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