| 火灾中网架结构受力分析与设计方法 |
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| 引用本文： | 白音,石永久,王元清.火灾中网架结构受力分析与设计方法[J].深圳大学学报(理工版),2011,28(2). |
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| 作者姓名： | 白音 石永久 王元清 |
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| 作者单位： | 1. 北京航空航天大学交通科学与工程学院,北京,100191
2. 清华大学土木工程系,结构工程与振动教育部重点实验室,北京,100084 |
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| 基金项目： | 高等学校博士学科点专项科研基金资助项目 |
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| 摘 要： | 以典型大跨度平板网架结构为研究对象,基于火灾下网架结构受力性能的有限元分析方法和原理,通过大量数值计算,分析火灾高温作用下结构的整体变形和受力性能,揭示此类结构抗火受力性能的主要影响因素,给出典型跨度网架结构各种不同参数下的火灾临界温度设计值.在拟夹层板设计方法基础上进行理论与数值分析,获得了火灾下计算网架结构最大位移值的简化计算方法--修正拟夹层板法.在适用范围内,该法可简便算出火灾下网架结构的最大变形值.
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| 关 键 词： | 结构工程 抗火设计方法 数值模拟 网架结构 受力性能 临界温度 |
Mechanical properties analysis and design method for grid structures under fire conditions |
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| BAI Yin,SHI Yong-jiu,WANG Yuan-qing.Mechanical properties analysis and design method for grid structures under fire conditions[J].Journal of Shenzhen University(Science &engineering),2011,28(2). |
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| Authors: | BAI Yin SHI Yong-jiu WANG Yuan-qing |
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| Affiliation: | BAI Yin1,SHI Yong-jiu2,and WANG Yuan-qing2 1)School of Transportation Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191P.R.China 2)Department of Civil EngineeringKey Laboratory of Structural Engineering and Vibration of Ministry of Education,Tsinghua University Beijing 100084P.R.Chin |
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| Abstract: | The mechanical properties and deformations of typical long-span grid structures under fire conditions were analyzed with finite element analysis and numerical simulation.The critical temperatures for different typical spans and parameters were computed.A modified sandwich plate analogy method for calculating maximum displacement of grid structures under fire conditions was used to simplify the computation.The results show that the proposed method is good for calculating maximum displacement under fire condi... |
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| Keywords: | structural engineering fire-resisting design method numerical simulation grid structure mechanical properties critical temperature |
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