双塔连体结构弹塑性时程分析
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摘要
双塔连体结构是我国实际工程中应用越来越多的一种结构形式。该结构形式是在两塔楼顶部设置连体部分的新型建筑结构形式。本文针对某一连体结构,采用NosaCAD有限元软件建立整体结构分析模型。通过建立模型,分析结构在7度多遇和罕遇地震下的弹塑性时程反应,得到结构在地震作用下的变形、内力和破坏情况的变化过程。结果表明,小震情况下,结构构件未出现损坏。大震情况下,结构最大层间位移角满足1/100的限值要求,结构框架柱未出现破坏,部分剪力墙底部边缘出现少量局部破坏,结构构件损坏顺序和分布较为合理,能在一定程度上耗散地震输入能量。结构可以满足小震不坏大震不倒的设防要求。最后根据构件的受力及损坏情况,给出了设计改进建议。
As a new structure system,the double-tower connected structure(DTCS) is applied more and more widely in China.In this paper,in order to study the seismic behavior of the structure under frequent and rare earthquakes with intensity 7,the model of DTCS is built with NosaCAD.Based on the analysis,the deformations,internal forces and damage patterns of the structure are investigated.The study results show that under the frequent earthquakes,there is no damaged element.Under the rare earthquakes,the maximum inter-story drifts are less than that of the requirements of the Chinese seismic design code.There is no damage in the columns and few shear walls are damaged at the edge of bottom.The order and distribution of damage in the components of the tubes are reasonable,which can dissipate some dynamic energy.Finally,according to internal forces and load-carrying capacity or damage state of the elements,some suggestions for improving the seismic design are put forward.
As a new structure system,the double-tower connected structure(DTCS) is applied more and more widely in China.In this paper,in order to study the seismic behavior of the structure under frequent and rare earthquakes with intensity 7,the model of DTCS is built with NosaCAD.Based on the analysis,the deformations,internal forces and damage patterns of the structure are investigated.The study results show that under the frequent earthquakes,there is no damaged element.Under the rare earthquakes,the maximum inter-story drifts are less than that of the requirements of the Chinese seismic design code.There is no damage in the columns and few shear walls are damaged at the edge of bottom.The order and distribution of damage in the components of the tubes are reasonable,which can dissipate some dynamic energy.Finally,according to internal forces and load-carrying capacity or damage state of the elements,some suggestions for improving the seismic design are put forward.
引文
[1]GB 50011—2001建筑抗震设计规范[S].
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[3]同济大学土木工程防灾国家重点实验室.舟山市普陀区东港商务中心1、2#楼结构模型模拟地震振动台试验研究报告[R].上海:同济大学,2008.
[4]同济大学土木工程防灾国家重点实验室.舟山市普陀区东港商务中心1、2#楼结构结构抗震计算分析报告[R].上海:同济大学,2008.
[5]周颖,吕西林,卢文胜,等.双塔连体高层混合结构抗震性能研究[J].地震工程与工程振动,2008,28(5):71-78.
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[11]吴晓涵,吕西林.反复荷载下混凝土剪力墙非线性有限元分析[J].同济大学学报,1996,24(2):117-123.
[2]黄志华,吕西林,周颖,等.双塔连体结构的模拟地震振动台模型试验研究[J].建筑结构学报,2009,30(5):31-38.
[3]同济大学土木工程防灾国家重点实验室.舟山市普陀区东港商务中心1、2#楼结构模型模拟地震振动台试验研究报告[R].上海:同济大学,2008.
[4]同济大学土木工程防灾国家重点实验室.舟山市普陀区东港商务中心1、2#楼结构结构抗震计算分析报告[R].上海:同济大学,2008.
[5]周颖,吕西林,卢文胜,等.双塔连体高层混合结构抗震性能研究[J].地震工程与工程振动,2008,28(5):71-78.
[6]顾祥林,孙飞飞.混凝土结构的计算机仿真[M].上海:同济大学出版社,2002.
[7]吕西林.复杂高层建筑结构抗震理论与应用[M].北京:科学出版社,2007.
[8]吕西林,金国芳,吴晓涵.钢筋混凝土结构非线性有限元理论与应用[M].上海:同济大学出版社.2002.
[9]龙志飞,岑松.有限元法新论:原理.程序.进展[M].北京:中国水利水电出版社,2001.
[10]Darwin D,Pecknold D A.Analysis of RC shear panels under cyclic loading[J].Journal of the Structural Division.ASCE,1976,102(2):355-369.
[11]吴晓涵,吕西林.反复荷载下混凝土剪力墙非线性有限元分析[J].同济大学学报,1996,24(2):117-123.
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