| 火灾下预应力损失对新型弦支穹顶结构稳定性影响分析 |
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| 引用本文： | 张爱林,饶雯婧,崔伟龙.火灾下预应力损失对新型弦支穹顶结构稳定性影响分析[J].北京工业大学学报,2010,36(8). |
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| 作者姓名： | 张爱林 饶雯婧 崔伟龙 |
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| 作者单位： | 北京工业大学,建筑工程学院,北京,100124;北京工业大学,建筑工程学院,北京,100124;北京市勘察设计研究院有限公司,北京,100038 |
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| 基金项目： | 国家自然科学基金资助项目，北京市科委科技奥运专项资助项目，北京市拔尖创新人才资助项目 |
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| 摘 要： | 为了研究奥运会羽毛球馆在火灾情况下的性能,作者基于大空间空气升温理论对温度场进行了模拟,通过预应力损失反映温度变化对索力大小的影响,并对弦支穹顶结构进行了双重非线性影响的稳定承载力分析研究.计算结果表明,结构在90min火灾后除最外圈环索以外,其余环索的预应力损失比较明显,整体稳定承载力下降约1/5,但仍具有一定的安全储备;材料高温蠕变性对结构稳定承载力的影响很小,在结构抗火分析时可以忽略.
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| 关 键 词： | 弦支穹顶 预应力损失 高温蠕变 整体稳定性 |
Stability Analysis of Pre-stress Loss on Suspend-dome Structure Under Fire Hazard |
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| ZHANG Ai-lin,RAO Wen-jing,CUI Wei-long.Stability Analysis of Pre-stress Loss on Suspend-dome Structure Under Fire Hazard[J].Journal of Beijing Polytechnic University,2010,36(8). |
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| Authors: | ZHANG Ai-lin RAO Wen-jing CUI Wei-long |
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| Affiliation: | ZHANG Ai-lin1,RAO Wen-jing1,2,CUI Wei-long1(1. College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China,2. Beijing Geotechnical Institute Engineering Consultants Ltd.,Beijing 100038,China) |
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| Abstract: | To study the behavior of the badminton gymnasium for 2008 Olympic Games in case of fire,numerical simulation of the temperature field is performed,which is based on the model of air temperature rising for large buildings. By defining pre-stress loss in calculation program,the influences of temperature variations on cable forces is reflected. Corresponding analysis involving geometry and material nonlinearities are carried out to predict the behavior of the structure. The results shows that 90 minutes after ... |
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| Keywords: | suspend-dome pre-stress loss thermal creep integral stability |
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