楼板开洞高层结构地震响应研究
|
摘要
楼板开洞的不规则高层结构地震作用下的灾害远远超过了规则结构。文章首先设计了一18层框架-剪力墙结构,并以其为原型选择10层楼板进行开洞,对比分析了10层楼板不同开洞位置及不同开洞率模型。分析结果表明:楼板开洞后降低了楼层抗侧刚度,楼层分配到的地震力减小;楼板不对称开洞较对称开洞的剪力卸载效应更明显,扭转响应更敏感;角部开洞模型扭转最明显,开洞后楼层层间位移角放大,并且随着开洞率升高而增大,而当开洞率达到一定高度时,层间位移角随开洞率变化的趋势并不敏感。最后针对分析结果提出了相应的设计建议。
Earthquake disaster of high-rise structure floors with irregular holes is more than the regular structure.At first,a frame-shear wall structure is designed in this paper.The tenth layer of this structure is selected to open holes,and comparison and analysis on different holes' location and area ratio are carried out with this structure as background.The analysis results show that the story lateral stiffness and its seismic force are deduced,due to the open hole on the floor.A symmetrical open hole of the floor makes shear unloading effect more obvious and torsional response more sensitive than an asymmetrical one does.The inter-story drift increases for the increasing rate of the open hole.However,when the open rate reached a certain height,the variation of the inter-story drift with the rate is not sensitive.Finally,some suggestions are put forward according to the analysis results.
Earthquake disaster of high-rise structure floors with irregular holes is more than the regular structure.At first,a frame-shear wall structure is designed in this paper.The tenth layer of this structure is selected to open holes,and comparison and analysis on different holes' location and area ratio are carried out with this structure as background.The analysis results show that the story lateral stiffness and its seismic force are deduced,due to the open hole on the floor.A symmetrical open hole of the floor makes shear unloading effect more obvious and torsional response more sensitive than an asymmetrical one does.The inter-story drift increases for the increasing rate of the open hole.However,when the open rate reached a certain height,the variation of the inter-story drift with the rate is not sensitive.Finally,some suggestions are put forward according to the analysis results.
引文
[1]刁现伟.不规则框架结构抗震性能研究及基于性能的抗震设计[D].上海:同济大学,2006.
[2]施卫星,丁美,成广伟,等.超限高层建筑整体模型模拟地震振动台试验研究[J].四川大学学报:工程科学版,2007,22(6):50-56.
[3]姜鋆,王翠坤,肖从真,钱稼茹,刘军进,林祥.一幢特别不规则高层建筑结构模型的振动台试验研究[J].建筑科学,2005,21(1):19-25.
[4]孔德堂.平面不规则钢筋混凝土框架结构抗震性能分析和评估[D].西安:西安建筑科技大学,2006.
[5]平面楼板不规则的复杂高层建筑结构的抗震分析[D].上海:同济大学,2005.
[6]GB50011-2010建筑抗震设计规范[S]北京:中国建筑工业出版社,2010.
[2]施卫星,丁美,成广伟,等.超限高层建筑整体模型模拟地震振动台试验研究[J].四川大学学报:工程科学版,2007,22(6):50-56.
[3]姜鋆,王翠坤,肖从真,钱稼茹,刘军进,林祥.一幢特别不规则高层建筑结构模型的振动台试验研究[J].建筑科学,2005,21(1):19-25.
[4]孔德堂.平面不规则钢筋混凝土框架结构抗震性能分析和评估[D].西安:西安建筑科技大学,2006.
[5]平面楼板不规则的复杂高层建筑结构的抗震分析[D].上海:同济大学,2005.
[6]GB50011-2010建筑抗震设计规范[S]北京:中国建筑工业出版社,2010.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心