现浇楼梯对框架结构的抗震影响分析与设计建议
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摘要
通过对计入和不计入楼梯的18个框架结构模型的分析对比,研究地震作用下楼梯对于框架结构整体性能和受力性能的影响。对于在整体结构中起着斜撑作用的楼梯的受力情况进行分析,并进行有限元分析。对于计入楼梯的框架结构模型采用弹塑性时程分析,了解结构屈服机制。通过计算分析比较,提出一种将楼梯与整体结构脱离的设计建议。
A total of 18 structure models,with and without staircases,are analyzed and compared.The staircase effect on the earthquake-resistance performance of frame structures is studied.The internal forces of the staircase members,which act as inclined strut in structure,are calculated.The stress of the staircase members are analyzed using finite element method.The elasto-plastic dynamical response analysis using the time history analysis method is conducted for the frame structures with staircases to determine the structure yielding mechanism.It is suggested that staircase should be isolated from the main structure in design.
A total of 18 structure models,with and without staircases,are analyzed and compared.The staircase effect on the earthquake-resistance performance of frame structures is studied.The internal forces of the staircase members,which act as inclined strut in structure,are calculated.The stress of the staircase members are analyzed using finite element method.The elasto-plastic dynamical response analysis using the time history analysis method is conducted for the frame structures with staircases to determine the structure yielding mechanism.It is suggested that staircase should be isolated from the main structure in design.
引文
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[7]缪志伟,陆新征,叶列平.分层壳单元在剪力墙结构有限元计算中的应用[J].建筑结构学报,2006,27(S2):932-935(Miao Zhiwei,Lu Xinzheng,Ye Lieping.Applications of the multilayer shell element in the finiteelement analysis of shear wall structures[J].Journal ofBuilding Structures,2006,27(S2):932-935(in Chinese))
[2]GB 50011—2001建筑抗震设计规范[S].北京:中国建筑工业出版社,2001(GB 50011—2001 Code for seismicdesign of buildings[S].Beijing:China Architecture&Building Press,2001(in Chinese))
[3]王奇,马宝民.钢筋混凝土现浇楼梯对整体结构的影响[J].建筑结构,2002,32(4):27-29,69
[4]曹万林,庞国新,李云霄.带楼梯框架弹性层刚度的试验研究[J].世界地震工程,1996(2):29-32(CaoWanlin,Pang Guoxin,Li Yunxiao.The test research onelastic floor rigidity of frame with staircase[J].WorldInformation on Earthquake Engineering,1996(2):29-32(in Chinese))
[5]曹万林,庞国新,李云霄.带楼梯框架弹塑性工作性能研究[J].世界地震工程,1996(3):52-56,64(CaoWanlin,Pang Guoxin,Li Yunxiao.On elastoplasticperformance of frames with staircase[J].World Informationon Earthquake Engineering,1996(3):52-56,64(inChinese))
[6]陆新征,缪志伟,江见鲸,等.静力和动力荷载作用下混凝土高层结构的倒塌模拟[J].山西地震,2006,126(2):7-11(Lu Xinzheng,Miao Zhiwei,Jiang Jianjing,etal.Collapse simulation of high-rise structure of concreteunder the action of static and dynamic load[J].EarthquakeResearch in Shanxi,2006,126(2):7-11(in Chinese))
[7]缪志伟,陆新征,叶列平.分层壳单元在剪力墙结构有限元计算中的应用[J].建筑结构学报,2006,27(S2):932-935(Miao Zhiwei,Lu Xinzheng,Ye Lieping.Applications of the multilayer shell element in the finiteelement analysis of shear wall structures[J].Journal ofBuilding Structures,2006,27(S2):932-935(in Chinese))
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