The Experts below are selected from a list of 23757 Experts worldwide ranked by ideXlab platform
Mohamed A. Sultan - One of the best experts on this subject based on the ideXlab platform.
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Fire Resistance of Wood Truss Floor Assemblies
Fire Technology, 2015Co-Authors: Mohamed A. SultanAbstract:This paper presents and discusses the factors that affect the Fire Resistance performance of lightweight wood truss floor assemblies protected with two layers of Type X gypsum board ceiling finishes. Fifteen full-scale Fire Resistance floor experiments were conducted using the CAN/ULC S-101 Fire Resistance standard which is similar to the ASTM E119. Parameters investigated in this study include the effects of insulation installation in floor cavity, insulation type, wood truss spacing, resilient channel installation, resilient channel spacing, wood truss width, wood truss chord orientation, wood truss web type, wood truss connection type and adding concrete topping above the sub-floor. The impact of these parameters on the Fire Resistance performance of the wood truss floor assemblies is discussed. The Fire Resistance of wood truss floors appears to be essentially governed by the wood trusses’ spacing for direct application of gypsum board to wood truss framing, insulation type and resilient channel installation and spacing. Other parameters are of secondary importance.
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Fire Resistance of Wood Truss Floor Assemblies
Fire Technology, 2012Co-Authors: Mohamed A. SultanAbstract:This paper presents and discusses the factors that affect the Fire Resistance performance of lightweight wood truss floor assemblies protected with two layers of Type X gypsum board ceiling finishes. Fifteen full-scale Fire Resistance floor experiments were conducted using the CAN/ULC S-101 Fire Resistance standard which is similar to the ASTM E119. Parameters investigated in this study include the effects of insulation installation in floor cavity, insulation type, wood truss spacing, resilient channel installation, resilient channel spacing, wood truss width, wood truss chord orientation, wood truss web type, wood truss connection type and adding concrete topping above the sub-floor. The impact of these parameters on the Fire Resistance performance of the wood truss floor assemblies is discussed. The Fire Resistance of wood truss floors appears to be essentially governed by the wood trusses\u2019 spacing for direct application of gypsum board to wood truss framing, insulation type and resilient channel installation and spacing. Other parameters are of secondary importance.Peer reviewed: YesNRC publication: Ye
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Fire Resistance of Steel C-Joist Floor Assemblies
Fire Technology, 2010Co-Authors: Mohamed A. SultanAbstract:This paper discusses the factors that affect the Fire Resistance performance of lightweight steel-framed (LSF) unrestrained floor assemblies protected with Type X gypsum board ceiling finishes. Sixteen Fire Resistance experiments were conducted on full-scale load-bearing steel C-joist floor assemblies using the ULC standard Fire exposure time–temperature curve that is similar to ASTM E119 standard. Parameters investigated in this study include the effects of insulation installation, insulation type, joist spacing, resilient channel installation, resilient channel spacing, type of sub-floor layer and number of sub-floor layers versus number of gypsum board layers. The impact of these parameters on the Fire Resistance of steel C-joist frame floor assemblies is discussed. The Fire Resistance of LSF floors appears to be essentially governed by the number of gypsum board layers, spacing of the joists or resilient channels where the gypsum boards are attached, sub-floor type and insulation type. Other parameters are of secondary importance.
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Fire Resistance of Wood Joist Floor Assemblies
Fire Technology, 2008Co-Authors: Mohamed A. SultanAbstract:This paper discusses the factors that affect the Fire Resistance performance of lightweight wood frame unrestrained floor assemblies protected with Type X gypsum board ceiling finishes. Twenty-two Fire Resistance experiments were conducted on full-scale load-bearing wood joist floor assemblies using the ULC standard Fire exposure time–temperature curve that is similar to ASTM E119 standard. Parameters investigated in this study include the effects of gypsum board screws spacing from board edges, insulation installation, insulation type, joist spacing for assemblies with gypsum board attached to resilient channels, joist depth, resilient channel installation, resilient channel spacing, sub-floor topping, number of sub-floor layers, and load magnitude. The impact of these parameters on the Fire Resistance of wood joist frame floor assemblies is discussed. The Fire Resistance of wood frame floors appears essentially to be governed by the gypsum board screw spacing from the board edges and the type of insulation in assemblies with one layer of gypsum board and by the resilient channel spacing and the gypsum board screw spacing from the board edges in assemblies with two layers of gypsum board. The effects of other parameters in assemblies with two layers of gypsum board such as the joist spacing where the gypsum boards are attached to resilient channels, installation of resilient channels, insulation installation, insulation type, adding gyp-crete topping above the sub-floor and number of sub-floor layers on Fire Resistance are relatively insignificant.
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Fire Resistance of wood joist floor assemblies
Fire Technology, 2008Co-Authors: Mohamed A. SultanAbstract:This paper presents and discusses the factors that affect the Fire Resistance performance of lightweight wood truss floor assemblies protected with two layers of Type X gypsum board ceiling finishes. Fifteen full-scale Fire Resistance floor experiments were conducted using the CAN/ULC S-101 Fire Resistance standard which is similar to the ASTM E119. Parameters investigated in this study include the effects of insulation installation in floor cavity, insulation type, wood truss spacing, resilient channel installation, resilient channel spacing, wood truss width, wood truss chord orientation, wood truss web type, wood truss connection type and adding concrete topping above the sub-floor. The impact of these parameters on the Fire Resistance performance of the wood truss floor assemblies is discussed. The Fire Resistance of wood truss floors appears to be essentially governed by the wood trusses’ spacing for direct application of gypsum board to wood truss framing, insulation type and resilient channel installation and spacing. Other parameters are of secondary importance.
Fu Ping Cheng - One of the best experts on this subject based on the ideXlab platform.
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Fire Resistance of Concrete Slabs in Punching Shear
Journal of Structural Engineering, 2014Co-Authors: Jen Shou Liao, Fu Ping Cheng, Cheng-chih ChenAbstract:AbstractTwelve specimens of reinforced concrete slab-column connections were tested to investigate Fire Resistance of punching shear. Half of the specimens were tested at room temperature to determine punching shear strength. Half were tested for Fire Resistance. The parameters of the specimens included steel reinforcement ratio, concrete compressive strength, and Fire loading type. Fire Resistance tests were carried out under constant maximum service loads at elevated temperatures according to ASTM E119 time-temperature curve. Temperature distribution, time-deflection relationship, and Fire Resistance were measured to determine the mechanical behavior of the slab-column connections subjected to Fire loading on either the tension side or the compression side of the slabs. Experimental results showed that slabs heated on the compression side did not fail for up to 8 h, whereas those heated on the tension side failed at around 4 h. Specimens using normal-strength concrete have better Fire Resistance than th...
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predicting the Fire Resistance behaviour of high strength concrete columns
Cement & Concrete Composites, 2004Co-Authors: Venkatesh Kodur, T C Wang, Fu Ping ChengAbstract:Abstract A numerical model, in the form of a computer program, for tracing the behaviour of high performance concrete (HPC) columns exposed to Fire is presented. The three stages, associated with the thermal and structural analysis, for the calculation of Fire Resistance of columns are explained. A simplified approach is proposed to account for spalling under Fire conditions. The use of the computer program for tracing the response of an HPC column from the initial pre-loading stage to collapse, due to Fire, is demonstrated. The validity of the numerical model used in the program is established by comparing the predictions from the computer program with results from full-scale Fire Resistance tests. Details of Fire Resistance experiments carried out on HPC columns, together with results, are presented. The computer program can be used to predict the Fire Resistance of HPC columns for any value of the significant parameters, such as load, section dimensions, fiber reinforcement, column length, concrete strength, aggregate type, and fiber reinforcement.
Venkatesh Kodur - One of the best experts on this subject based on the ideXlab platform.
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Design equation for predicting Fire Resistance of reinforced concrete columns
Structural Concrete, 2009Co-Authors: Venkatesh Kodur, Nikhil RautAbstract:An empirical equation for evaluating the Fire Resistance of reinforced concrete (RC) columns is presented. Data from a large set of experimental studies are analysed to study the influence of various parameters on the Fire Resistance of RC columns. The Fire test data are utilised to develop a simplified equation for expressing the Fire Resistance of RC columns as a function of influencing parameters. The validity of the equation is established by comparing the predictions from the empirical equation with data obtained from Fire Resistance experiments and analytical studies. Predictions from the proposed equation are in good agreement with the test results and computer models, and provide better estimates of Fire Resistance than those predicted from current codes of practice. The proposed equation also incorporates parameters such as load eccentricity, which is not included in the current equations available in the literature. Furthermore, the proposed equation expresses the Fire Resistance in terms of con...
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predicting the Fire Resistance behaviour of high strength concrete columns
Cement & Concrete Composites, 2004Co-Authors: Venkatesh Kodur, T C Wang, Fu Ping ChengAbstract:Abstract A numerical model, in the form of a computer program, for tracing the behaviour of high performance concrete (HPC) columns exposed to Fire is presented. The three stages, associated with the thermal and structural analysis, for the calculation of Fire Resistance of columns are explained. A simplified approach is proposed to account for spalling under Fire conditions. The use of the computer program for tracing the response of an HPC column from the initial pre-loading stage to collapse, due to Fire, is demonstrated. The validity of the numerical model used in the program is established by comparing the predictions from the computer program with results from full-scale Fire Resistance tests. Details of Fire Resistance experiments carried out on HPC columns, together with results, are presented. The computer program can be used to predict the Fire Resistance of HPC columns for any value of the significant parameters, such as load, section dimensions, fiber reinforcement, column length, concrete strength, aggregate type, and fiber reinforcement.
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performance based Fire Resistance design of concrete filled steel columns
Journal of Constructional Steel Research, 1999Co-Authors: Venkatesh KodurAbstract:A simplified design equation for evaluating the Fire Resistance of concrete-filled circular and square hollow structural steel (HSS) columns is presented. The equation is expressed in terms of various structural design parameters affecting the Fire Resistance, and hence can easily be integrated into conventional structural design. This equation can be used to evaluate the Fire Resistance of HSS columns filled with various types of concrete filling. The use of the design equation greatly facilitates the calculation of the Fire Resistance of structural members on a performance basis. It also enables the designer to find cost-effective solutions in providing the required Fire Resistance performance for structural members, simply by varying the parameters of the members. The applicability of the proposed equation to a design situation is illustrated through a numerical example. Practical guidelines that can be implemented during the design and construction phase, and which have beneficial effects on the Fire Resistance behaviour concrete-filled of hollow steel columns, are also presented.
Yong Qian Zheng - One of the best experts on this subject based on the ideXlab platform.
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Analysis on Fire Resistance of Reinforced Concrete Wall
Advanced Materials Research, 2011Co-Authors: Yong Qian Zheng, Jin Ping ZhuangAbstract:Fire Resistance design of Reinforced concrete wall is one of the important issues for structural safety. The sequentially coupled thermal-stress analysis method in ABAQUS software is used to calculate the Fire Resistance of walls. The results of a parametric study to examine the influences of parameters, such as axial load level, lateral load level, height-to-thickness ratio, wall thickness, material strengths, steel reinforcement ratio and concrete protection thickness to reinforcements on Fire Resistance of RC walls are presented.
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Calculations on the Fire Resistance of steel reinforced concrete (SRC) columns
Fourth International Conference on Advances in Steel Structures, 2005Co-Authors: Yong Qian Zheng, Lin-hai HanAbstract:Publisher Summary The chapter describes a theoretical model that calculates deformations and strength of steel reinforced concrete (SRC) columns in Fire and Fire Resistance. A comparison of results calculated using this model with the results of tests is done, and good agreement between both the results is found in the chapter. Based on the theoretical model, the influence of the changing strength of the materials, the sectional dimensions, the steel ratio, the load eccentricity ratio, the depth-to-width ratio, and the slenderness ratio on the Fire Resistance is discussed in the chapter. It is found that, in general, the sectional dimensions and the slenderness ratio have a significant influence on the Fire Resistance of SRC columns. However, the influence of other parameters, such as the steel ratio, the depth-to-width ratio, the load eccentricity ratio, and the strength of the concrete and the steel on the Fire Resistance is small. An analytical method capable of predicting Fire Resistance of SRC columns is also introduced in the chapter.
V K R Kodur - One of the best experts on this subject based on the ideXlab platform.
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evaluating Fire Resistance of steel girders in bridges
Journal of Bridge Engineering, 2013Co-Authors: V K R Kodur, Esam M Aziz, M M S DwaikatAbstract:In current practice, no special measures are applied for enhancing structural Fire safety of steel bridge girders. Further, there is very limited information and research data in the literature on the Fire Resistance of structural members in bridges. In this paper, the Fire response of a steel bridge girder under different conditions is evaluated using the FEM computer program ANSYS. In the analysis, the critical factors that influence Fire Resistance, namely, Fire scenario, Fire insulation, and composite action arising from steel-concrete interaction, are accounted for. Results from numerical studies show that the composite action arising from steel-girder-concrete-slab interaction significantly enhances the structuralperformance(and FireResistance)ofasteelbridgegirderunder Fireconditions.Othersignificantfactorsthatinfluence FireResistanceof steel bridge girders are Fire insulation and type of Fire scenario. DOI: 10.1061/(ASCE)BE.1943-5592.0000412. © 2013 American Society of Civil Engineers. CE Database subject headings: Fires; Fire Resistance; Girder bridges; Steel bridges. Author keywords: Bridge Fires; Fire Resistance; Steel girders; FEM analysis.
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design equation for predicting Fire Resistance of reinforced concrete beams
Engineering Structures, 2011Co-Authors: V K R Kodur, Monther B DwaikatAbstract:An approach for evaluating the Fire Resistance of reinforced concrete (RC) beams is presented in this paper. A macroscopic finite element model is applied to study the influence of various parameters on the Fire Resistance of RC beams. Data from parametric studies is utilized to develop a simplified expression for evaluating the Fire Resistance of an RC beam as a function of influencing parameters. The validity of the proposed approach is established by comparing the Fire Resistance predictions with those obtained from finite element studies as well as from Fire Resistance tests. Predictions from the proposed equation are also compared with Fire Resistance estimates from current codes of practice. The applicability of the approach to design situations is illustrated through a numerical example. The proposed rational approach expresses Fire Resistance in terms of conventional structural and material design parameters, and thus facilitates easy evaluation of Fire Resistance. The proposed approach provides better estimates than those from current codes of practice and thus can be used to evaluate the Fire Resistance of RC beams with an accuracy that is adequate for design purposes.
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guidelines for improving the standard Fire Resistance test specifications
Journal of Astm International, 2009Co-Authors: V K R Kodur, Rustin FikeAbstract:The current approach of evaluating Fire Resistance is mainly through standard Fire tests. The specifications for standard Fire tests have a number of drawbacks and require only a limited amount of data to be collected during tests, and this is hindering the development of calculation methodologies for evaluating Fire Resistance. This paper discusses the various drawbacks in the current specifications for undertaking Fire Resistance tests. The improvements needed to make the standard Fire Resistance tests more effective and the collected test data more useful are outlined. Strategies for implementing the proposed recommendations (improvements) in test standards are illustrated with examples. Finally, the applicability of the proposed recommendations is illustrated by undertaking Fire Resistance tests on a midsized column and a midsized beam under improved test specifications. Data collected from these Fire Resistance tests is used to calibrate finite element based computer models, thus demonstrating the effectiveness of collecting additional test data.
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high temperature properties of concrete for Fire Resistance modeling of structures
Aci Materials Journal, 2008Co-Authors: V K R Kodur, M M S Dwaikat, Monther B DwaikatAbstract:Fire is one of the most severe conditions to which structures can be subjected, and hence, the provision of appropriate Fire safety measures for structural members is an important aspect of design. The recent introduction of performance-based codes has increased the use of computer-based models for Fire Resistance assessment. For evaluating the Fire Resistance of steel structures, high- temperature properties of steel are to be specified as input data. This paper reviews high-temperature constitutive relationships for steel currently available in American and European standards, and highlights the variation between these relationships through comparison with published experimental results. The effect of various constitutive models on overall Fire Resistance predictions is illustrated through case studies. It is also shown that high-temperature creep, which is not often included in constitutive models, has a significant influence on the Fire response of steel structures. Results from the case studies are used to draw recommendations on the use of appropriate constitutive models for Fire Resistance assessment. DOI: 10.1061/ASCEMT.1943-5533.0000041 CE Database subject headings: Constitutive relations; Fire Resistance; Temperature effects; Steel structures. Author keywords: Performance-based design; Fire Resistance; Constitutive relationships; High-temperature properties; Structural steel.
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factors influencing Fire Resistance of load bearing steel stud walls
Fire Technology, 2006Co-Authors: V K R Kodur, Mohamed A. SultanAbstract:This paper presents the effect of various factors on the Fire Resistance of load-bearing, gypsum board protected, steel stud wall assemblies. A detailed experimental study was conducted to evaluate the Fire Resistance of 14 full-scale steel stud wall assemblies. Both single row and double row steel stud configurations with installation of gypsum board on each of the exposed and unexposed sides, and with and without insulation in the cavity, were considered in the experimental program. The insulation used were glass, rock and dry blown cellulose fibers. Data from the experimental program are used to determine the effects of stud-spacing, shear membrane, load intensity, resilient channel installation, insulation type and gauge thickness of studs on the Fire Resistance of gypsum board-protected, steel stud wall assemblies. Results from the studies show that the insulation type and number of gypsum board layers have significant influence on the Fire Resistance of steel stud wall assemblies.