| 基于抽柱法的钢框架连续倒塌分析 |
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| 引用本文： | 谢甫哲,舒赣平,凤俊敏.基于抽柱法的钢框架连续倒塌分析[J].东南大学学报(自然科学版),2010,40(1). |
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| 作者姓名： | 谢甫哲 舒赣平 凤俊敏 |
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| 作者单位： | 东南大学土木工程学院,南京,210096 |
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| 摘 要： | 为较准确地进行连续倒塌分析,对抽柱法分析框架连续倒塌时柱失效时间取值、柱失效位置等问题进行研究.采用动力非线性计算方法分别对不同跨度和高度的空间纯框架及框架支撑结构进行连续倒塌模拟分析,得到结构动力效应与柱失效时间的关系曲线和各失效点的位移时程曲线.分析结果表明:随着柱失效时间的减小,结构的动力效应趋于收敛;柱失效位置对剩余结构的影响较大,某些情况下可能会导致剩余结构产生共振.建议在对结构进行连续倒塌分析时,取剩余结构竖向振动周期的1/10,不应大于1/5.柱间支撑作为抗连续倒塌的一道防线起到的缓冲作用能很好地提高结构抗连续倒塌能力.
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| 关 键 词： | 连续倒塌 钢框架 失效时间 动力非线性分析 |
Progressive collapse analysis of steel frame structure using removing column method |
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| Xie Fuzhe,Shu Ganping,Feng Junmin.Progressive collapse analysis of steel frame structure using removing column method[J].Journal of Southeast University(Natural Science Edition),2010,40(1). |
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| Authors: | Xie Fuzhe Shu Ganping Feng Junmin |
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| Institution: | School of Civil Engineering;Southeast University;Nanjing 210096;China |
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| Abstract: | The issues of column failure time and position of removing column method are studied in order to carry on the progressive collapse analysis more properly.The progressive collapse analysis on moment resisting frames of various span length,height and braced frames is analyzed.The curves of dynamic effect to column failure time and the displacement-time of column failure point are obtained.The results indicate that the dynamic effect of the residual structure converges with the decrease of column failure time;... |
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| Keywords: | progressive collapse steel frame structure time of column failure nonlinear-dynamic analysis |
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