结构弹塑性分析基底剪力的判断与探讨
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摘要
在某项目的弹塑性分析过程中曾发现,结构在某些地震波作用下出现了弹塑性分析基底剪力大于弹性分析基底剪力的情况,这与一般的经验判断不相符。研究了地震波的能量谱特性,并以单自由度体系为例分析了结构基底剪力与地震波总输入能之间的关系,提出了该现象发生原因。通过研究处于不同周期的单自由度体系和框架结构弹性分析基底剪力和弹塑性分析基底剪力的关系,验证了该分析的正确性。
A phenomenon that the base shear in elasto-plastic analysis is greater than that in elastic analysis under some seismic wave was found in the process of an elasto-plastic analysis of a practical project,which is not consistent with general experience. Detailed analyses were performed on energy spectrum and the relationship of base shear and total input energy based on single degree of freedom system,in which the cause of the phenomenon was proposed. And the correctness of the analysis was verified by studying the relationship of base shears in elastic analysis and in elasto-plastic analysis of single degree freedom system and frame with different periods.
A phenomenon that the base shear in elasto-plastic analysis is greater than that in elastic analysis under some seismic wave was found in the process of an elasto-plastic analysis of a practical project,which is not consistent with general experience. Detailed analyses were performed on energy spectrum and the relationship of base shear and total input energy based on single degree of freedom system,in which the cause of the phenomenon was proposed. And the correctness of the analysis was verified by studying the relationship of base shears in elastic analysis and in elasto-plastic analysis of single degree freedom system and frame with different periods.
引文
[1]甄圣威,汪洋.超高层结构弹塑性模拟中若干问题的讨论[J].建筑结构,2013,43(S1):546-551.
[2]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21-28.
[3]刘哲锋,沈蒲生.地震动输入能量谱的研究[J].工程抗震与加固改造,2006,28(4):1-5.
[4]肖明葵,刘纲,白绍良,等.基于能量反应的地震动输入选择方法的讨论[J].世界地震工程,2006,22(3):89-94.
[2]王亚勇.关于设计反应谱、时程法和能量方法的探讨[J].建筑结构学报,2000,21(1):21-28.
[3]刘哲锋,沈蒲生.地震动输入能量谱的研究[J].工程抗震与加固改造,2006,28(4):1-5.
[4]肖明葵,刘纲,白绍良,等.基于能量反应的地震动输入选择方法的讨论[J].世界地震工程,2006,22(3):89-94.
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