The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
K.a.s. Susantha - One of the best experts on this subject based on the ideXlab platform.
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Seismic capacity of building constructed in slip formed load Bearing Wall panels
2011Co-Authors: Himenshu Moragaspitiya, K.a.s. SusanthaAbstract:Constructing buildings using slip formed load Bearing Wall panels is becoming increasingly popular in Sri Lanka due to several advantages; low cost, environmental friendliness and rapid construction technique. These Wall panels are already successfully implemented in many low rise buildings. However, the seismic capacities of these buildings have not been properly studied. Few seismic activities reported in Sri Lanka have not caused severe structural damage, but predictions can not be made as to whether this will continue to be the case in the future. This highlights the need to study the seismic capacity of buildings constructed in slip formed load Bearing Wall panels. This paper presents a study of the seismic capacity of the existing medium rise building.
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Pushover Analysis of Slip formed Load Bearing Wall Panels
Engineer: Journal of the Institution of Engineers Sri Lanka, 2007Co-Authors: Himenshu Moragaspitiya, K.a.s. SusanthaAbstract:The slip formed load Bearing Wall panel constructing method is very effective in terms of cost and speed of construction. Moreover, it is environmentally friendly, because no river sand is used. In addition, different mix proportions of material give different load Bearing capabilities. This method has already been successfully implemented in many medium rise buildings in Sri Lanka. However they were not designed for earthquake loads. Therefore many such structures are susceptible to damage under possible effects of small to moderate earthquakes. This will have huge economic impact in countries like Sri Lanka. Pushover analysis method can be used to study the seismic resistance capacity of structures. This paper discusses seismic resistance capacity of slip formed load Bearing Wall panels using pushover analysis. The Wall panel was modelled using finite element method. Pushover analyses were conducted to examine the behavior of such structures under different boundary conditions. The variation of failure stresses in each node of the finite element model was examined with the help of Rankin failure criterion. The use of Rankin failure criterion is justified since the Wall panel materials display brittle behavior. The analytical results showed that the Wall panel constructed by this method shows different resistance against earthquake loadings when different material propositions are used.
Jeong Tai Kim - One of the best experts on this subject based on the ideXlab platform.
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The energy efficient expansion remodeling construction method of Bearing Wall apartment buildings with pre-cast composite structural systems
Energy and Buildings, 2013Co-Authors: Sunkuk Kim, Won-kee Hong, Jeong Tai KimAbstract:Abstract The remodeling construction method of Wall type apartment buildings utilizing conventional Rahmen structural system has some drawback of compatibility of the beam depth between existing Bearing Wall apartment buildings and conventional Rahmen structural system. The pre-cast composite structural systems presented in this study are capable of providing the identical floor depth with conventional apartment buildings. Connecting steels between the existing structures and new frames are developed and presented. This paper also presents the energy efficiencies and related merits of the remodeling construction method of Wall type apartment buildings. This work finally demonstrates that the use of pre-cast composite structural systems for the expansion of conventional Wall type apartment buildings would reduce the overall amount of energy input compared to utilizing the Wall structural system for remodeling. The energy consumptions of remodeling construction method with pre-cast composite structural systems were reduced by approximately 45% in comparison with conventional Wall type expansion, demonstrating opportunity for the healthy expansion of existing apartment spaces in environmentally friendly and sustainable ways.
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Experimental investigation of an energy-efficient hybrid composite beam during the construction phase
Energy and Buildings, 2012Co-Authors: Won-kee Hong, Su-young Jeong, Seon-chee Park, Jeong Tai KimAbstract:Abstract The replacement of old equipment in multi-residential apartment buildings with Bearing-Wall structural systems requires demolition and reconstruction. Several issues arise when performing such tasks, including the degradation of the urban environment, the wasting of resources, and the generation of construction waste. As a potential solution to these issues, a hybrid composite structural system for use in an apartment building was proposed. This system provides a level of architectural flexibility that is not offered by a conventional Bearing-Wall structure. The architectural flexibility extends the service life of apartment buildings by reducing the need for demolishing and reconstructing Bearing-Wall apartment buildings. In addition, the alternative system maximizes the efficiency of material use through the optimized relocation of structural steel, cast-in-place concrete, and precast concrete, thereby reducing material quantities and minimizing CO 2 emissions. When compared to a conventional Bearing-Wall apartment, the hybrid composite system consisting of structural steel, cast-in-place concrete, and precast concrete is expected to improve energy efficiency during construction. In this work, the results of analytical and experimental investigations of a hybrid composite beam to be used in multi-residential apartment buildings are presented. The beam was found to yield enhanced energy efficiency when compared to a conventional Bearing-Wall apartment. The developed analytical prediction method based on the strain compatibility theory was validated by experiment.
Himenshu Moragaspitiya - One of the best experts on this subject based on the ideXlab platform.
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Seismic capacity of building constructed in slip formed load Bearing Wall panels
2011Co-Authors: Himenshu Moragaspitiya, K.a.s. SusanthaAbstract:Constructing buildings using slip formed load Bearing Wall panels is becoming increasingly popular in Sri Lanka due to several advantages; low cost, environmental friendliness and rapid construction technique. These Wall panels are already successfully implemented in many low rise buildings. However, the seismic capacities of these buildings have not been properly studied. Few seismic activities reported in Sri Lanka have not caused severe structural damage, but predictions can not be made as to whether this will continue to be the case in the future. This highlights the need to study the seismic capacity of buildings constructed in slip formed load Bearing Wall panels. This paper presents a study of the seismic capacity of the existing medium rise building.
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Pushover Analysis of Slip formed Load Bearing Wall Panels
Engineer: Journal of the Institution of Engineers Sri Lanka, 2007Co-Authors: Himenshu Moragaspitiya, K.a.s. SusanthaAbstract:The slip formed load Bearing Wall panel constructing method is very effective in terms of cost and speed of construction. Moreover, it is environmentally friendly, because no river sand is used. In addition, different mix proportions of material give different load Bearing capabilities. This method has already been successfully implemented in many medium rise buildings in Sri Lanka. However they were not designed for earthquake loads. Therefore many such structures are susceptible to damage under possible effects of small to moderate earthquakes. This will have huge economic impact in countries like Sri Lanka. Pushover analysis method can be used to study the seismic resistance capacity of structures. This paper discusses seismic resistance capacity of slip formed load Bearing Wall panels using pushover analysis. The Wall panel was modelled using finite element method. Pushover analyses were conducted to examine the behavior of such structures under different boundary conditions. The variation of failure stresses in each node of the finite element model was examined with the help of Rankin failure criterion. The use of Rankin failure criterion is justified since the Wall panel materials display brittle behavior. The analytical results showed that the Wall panel constructed by this method shows different resistance against earthquake loadings when different material propositions are used.
James S Davidson - One of the best experts on this subject based on the ideXlab platform.
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Finite Element Assessment of Methods for Incorporating Axial Load Effects into Blast Design SDOF Analyses of Precast Wall Panels
Journal of Performance of Constructed Facilities, 2015Co-Authors: Joseph M. Nickerson, Patrick Trasborg, Charles M. Newberry, Clay Naito, James S DavidsonAbstract:AbstractInnovations in the U.S. construction and precast concrete manufacturing industries have resulted in efficient methods of constructing multistory buildings that are entirely supported by precast concrete Walls (i.e., no structural frame). Simultaneously, the U.S. government has mandated overarching requirements and incentives that promote energy efficiency in all government buildings and facilities. The combination of construction efficiencies and relatively recent requirements for improving energy efficiency makes total precast construction an attractive option for constructing government, diplomatic and U.S. Department of Defense (DoD) buildings and facilities. However, to design load Bearing Wall panels for DoD blast response criteria, engineers need a relatively simple method for analyzing dynamic response under combined lateral and axial load effects. This paper presents methods for incorporating the P-delta and P-M interaction effects into the single-degree-of-freedom (SDOF) framework that is...
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Finite Element Evaluation of Blast Design Response Criteria for Load-Bearing Precast Wall Panels:
International Journal of Protective Structures, 2015Co-Authors: Joseph M. Nickerson, Patrick Trasborg, Charles M. Newberry, Clay Naito, James S DavidsonAbstract:An impediment to using total precast construction for government, diplomatic and defense buildings is that load-Bearing Walls are defined as primary components and are therefore subject to significantly more restrictive blast response limits than non-load-Bearing Walls. These requirements are particularly restrictive for prestressed load-Bearing Wall panels. This paper presents analytical research used to define the behavior of precast/prestressed panels under combined axial loading and lateral impulse loading and to assess the current response criteria. Particular focus is placed on the ductility of load-Bearing Wall panels in comparison to non-load-Bearing panels. The analytical procedures primarily rely on high-fidelity finite element methodology (nonlinear static and explicit nonlinear dynamic) that has been thoroughly validated through full-scale laboratory testing. The study indicates that under elevated axial load the response limits of prestressed and conventionally reinforced Wall panels are comp...
Junliang Hong - One of the best experts on this subject based on the ideXlab platform.
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simplified timoshenko method for pile underpinning reinforcement of existing self Bearing brick masonry Walls
Journal of building engineering, 2021Co-Authors: Xuansheng Cheng, Junliang HongAbstract:Abstract This study aims to obtain a simplified calculation rule for an underpinning reinforcement model that considers the foundation of a self-Bearing Wall. First, simplified Timoshenko method (STM) is used to theoretically analyze three types of steel-brick masonry composite beams (SBMCB), and the deflection solution and axial normal stress solution for the composite beams are obtained. Second, a finite element analysis is carried out; the Wall weight is considered to be equivalent to a uniform load, and it acts on the top surface of the masonry. By establishing the mechanical model of SBMCB, the deflection and stress of different spans are calculated. Comparing the results with those of the STM, the differences between the STM and finite element method (FEM) are obtained. Finally, to apply the obtained results to foundation underpinning of a prison Wall, the relationship between the simplified calculation and the real model results is verified.