CFST框架-SPWS结构的地震响应分析
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摘要
对一按8度抗震设防的钢管混凝土框架-带竖缝钢板剪力墙结构(简称CFST框架-SPWS结构),基于LS-DYNA有限元程序对其进行了常遇地震作用下的动力响应分析,及罕遇地震作用下的倒塌分析。同时,进行了无带竖缝钢板剪力墙的框架结构在相应地震作用下的动力响应分析及倒塌分析。对比分析结果表明:钢管混凝土框架-带竖缝钢板剪力墙结构具有良好的抗震性能,在较高水平地震作用下,其结构局部破坏总是先于钢板剪力墙中出现,从而阻止或延缓了结构其他部位的破坏;钢管混凝土框架-带竖缝钢板剪力墙结构的抗倒塌能力明显强于不带钢板墙的结构,且在相同的地震作用水平下,有剪力墙结构的层间侧移明显小于无剪力墙结构。
Based on LS-DYNA finite element code,the dynamic characteristics and the seismic response of a concrete-filled steel tubular frame with slit steel shear walls,which is designed according to a seismic fortification intensity of 8 degree,are investigated under frequent and rare earthquake respectively.And a corresponding concrete-filled steel tubular frame without slit steel shear walls is analyzed under frequent and rare earthquake.By contrasting and analyzing,the results show that when the concrete-filled steel tubular frame with slit steel shear walls is analyzed under higher level earthquake,the local failure always occurs in the slit steel shear walls firstly.The seismic behavior of the frame with slit steel shear walls is better than that of the frame without slit steel shear walls.The story drift of the frame with slit steel shear walls is smaller than that of the frame without slit steel shear walls.
Based on LS-DYNA finite element code,the dynamic characteristics and the seismic response of a concrete-filled steel tubular frame with slit steel shear walls,which is designed according to a seismic fortification intensity of 8 degree,are investigated under frequent and rare earthquake respectively.And a corresponding concrete-filled steel tubular frame without slit steel shear walls is analyzed under frequent and rare earthquake.By contrasting and analyzing,the results show that when the concrete-filled steel tubular frame with slit steel shear walls is analyzed under higher level earthquake,the local failure always occurs in the slit steel shear walls firstly.The seismic behavior of the frame with slit steel shear walls is better than that of the frame without slit steel shear walls.The story drift of the frame with slit steel shear walls is smaller than that of the frame without slit steel shear walls.
引文
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[2]魏德敏,温沛纲.新型钢板剪力墙钢框架结构的地震响应分析[J].地震工程与工程振动,2004,24(1):63-67.
[3]Hitaka T,Matsui C.Experimental study on steel shearwall with slits[J].Journal of Structural Engineering,2003,129(5):586-594.
[4]贺有丰,崔利富,袁朝庆.带缝钢板剪力墙受力性能分析[J].钢结构,2009,24(2):5-8.
[5]温沛纲,魏德敏.带缝钢板剪力墙的理论分析[C]//中国计算力学大会论文集.北京:北京大学出版社,2003:1047-1052.
[6]Hallquist John O.LS-DYNA theoretical manual[R].Livermore:Livermore Software Technology Corpora-tion,1998.
[7]陆新征,江见鲸.世界贸易中心飞机撞击后倒塌过程的仿真分析[J].土木工程学报,2001,34(6):8-10.
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