框架结构爆破地震的损伤评估
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摘要
按规范设计了一个8度区(0.2 g)的6层框架结构,通过非线性软件IDARC计算了结构在天然地震和爆破地震作用下的结构反应。引入框架结构的爆破双参数损伤模型,采用多参数破坏准则,计算了框架结构爆破地震的损伤值。框架结构在天然地震作用下,4、5层的损伤最大,而在加速度峰值很大的爆破地震波作用下,结构底部发生的损伤最大。同时,在天然地震波作用下,结构进入非线性后,累积损伤占结构损伤的很大部分;而在爆破地震波作用下,结构更多的是发生冲击破坏,累积损伤相对于前者较小。为框架结构爆破地震的损伤评估及推广应用提供了有效途径。
Based on a nonlinear software,the response of a six-fioor frame structure to blasting induced ground motions was calculated.Based on experimental and simulated data,a double-parameter damage model of the frame structure was introduced.According to "Safety regulations for blasting",multi-parameter damage criteria were established,and the quantitative damage of the structure caused by blasting ground vibration was presented.The results indicated that the maximum damage was located at the bottom of the frame structure due to blasting induced ground motions,and cumulation damage occupied the less part of the structural damage;while the maximum damage was located at the 4 or 5 floor under seismic wave,and cumulation damage occupied the most part of the structural damage.An efficient path to assess the damage of the frame structure due to blasting induced ground motions was provided.
Based on a nonlinear software,the response of a six-fioor frame structure to blasting induced ground motions was calculated.Based on experimental and simulated data,a double-parameter damage model of the frame structure was introduced.According to "Safety regulations for blasting",multi-parameter damage criteria were established,and the quantitative damage of the structure caused by blasting ground vibration was presented.The results indicated that the maximum damage was located at the bottom of the frame structure due to blasting induced ground motions,and cumulation damage occupied the less part of the structural damage;while the maximum damage was located at the 4 or 5 floor under seismic wave,and cumulation damage occupied the most part of the structural damage.An efficient path to assess the damage of the frame structure due to blasting induced ground motions was provided.
引文
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[7]Wu Chengqing,Hao Hong.Numerical simulation of structuralresponses on a sand layer to blast induced ground excitations[J].Computers&Structure,2004,5:722-739.
[8]Dhakal R P,Pan T C.Response characteristics of structuressubjected to blasting-induced ground motion[J].Internationaljournal of impact engineering,2003,7:201-211.
[2]钱国胜,陈玲玲,等.爆破地震工程结构动力分析[M].北京:中国水利水电出版社,2006.
[3]牛获涛,任利杰.改进的钢筋混凝土结构双参数地震破坏模型[J].地震工程与工程振动,1996,(4):44-54.
[4]凌同华,李夕兵,等.基于小波分析的爆破地震效应评估[J].振动与冲击,2007,26(2):36-39.
[5]杨仁孟.框架结构的地震易损性分析方法的研究[D].中国地震局工程力学研究所,2006.
[6]崔波.框架结构对爆破地震效应的预测与损伤评估[D].重庆:重庆大学,2008.
[7]Wu Chengqing,Hao Hong.Numerical simulation of structuralresponses on a sand layer to blast induced ground excitations[J].Computers&Structure,2004,5:722-739.
[8]Dhakal R P,Pan T C.Response characteristics of structuressubjected to blasting-induced ground motion[J].Internationaljournal of impact engineering,2003,7:201-211.
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