悬挑大跨混凝土框架-剪力墙结构弹塑性分析及试验研究
|
摘要
某拟建文化艺术中心是一个具有大空间、大悬挑等特点的混凝土框架-剪力墙结构,结构一端为多层大悬挑结构,最大悬挑长度为22 m,并且在顶层中庭有30 m的大跨度区域,属平面和立面均不规则的结构。采用NOSACAD和ABAQUS有限元程序建立整体结构分析模型,进行7度罕遇烈度下的弹塑性时程分析,研究了该结构在大震作用下的变形情况、塑性铰的分布以及受力机理等。计算结果表明:结构的悬挑端在竖向地震作用下的动力响应显著,剪力墙受拉损伤在结构底部和悬挑楼层处较为明显;但在大震下层间位移角满足规范要求;并对结构裙房截断后的模型进行了1/30的大缩尺模拟地震振动台试验,验证了截断模型方法在本试验中的合理性,最后根据构件的受力或损坏情况给出了设计改进建议。
A culture and art center discussed here was a RC frame-wall structure characterized with a large cantilevered length and a large space,the maximum cantilevered length was 22 m and the maximum span of the large space was 30 m. It was irregular both in plan and elevation. Using Nosacad and Abaqus,the structural analysis model was established in order to simulate the nonlinear behavior and study deformations,distribution of plastic hinges,and forcebearing mechanism of the structure under the rare earthquake of magnitude of 7. The analysis results showed that the cantilevered end of the structure is sensitive to vertical earthquake; tension damage mainly occurs at the bottom of the shear wall and the cantilevered stories; the maximum inter-story drifts are less than the seismic design requirement of Chinese code. A 1 /30 scale model was tested on a shaking table to study the seismic behavior of this kind structure after cutting the podium of the structure,the comparison between the results before and after cutting was conducted to verify the reasonability of this design method. The test results agreed well with those of the finite element analysis. Finally,according to the response and damage results of the structure,suggestions for structure design improvment were given.
A culture and art center discussed here was a RC frame-wall structure characterized with a large cantilevered length and a large space,the maximum cantilevered length was 22 m and the maximum span of the large space was 30 m. It was irregular both in plan and elevation. Using Nosacad and Abaqus,the structural analysis model was established in order to simulate the nonlinear behavior and study deformations,distribution of plastic hinges,and forcebearing mechanism of the structure under the rare earthquake of magnitude of 7. The analysis results showed that the cantilevered end of the structure is sensitive to vertical earthquake; tension damage mainly occurs at the bottom of the shear wall and the cantilevered stories; the maximum inter-story drifts are less than the seismic design requirement of Chinese code. A 1 /30 scale model was tested on a shaking table to study the seismic behavior of this kind structure after cutting the podium of the structure,the comparison between the results before and after cutting was conducted to verify the reasonability of this design method. The test results agreed well with those of the finite element analysis. Finally,according to the response and damage results of the structure,suggestions for structure design improvment were given.
引文
[1]徐培福.复杂高层建筑结构设计[M].北京:中国建筑工业出版社,2005.
[2]Das S,Nau M.Seisimic design aspects of Vertical irregular reinforced concrete buildings[J].Earthquake Spectra,2003,19:455-477.
[3]JGJ 3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
[4]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[5]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.
[6]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.
[7]吕西林,金国芳,吴晓涵.钢筋混凝土非线性有限元理论与应用[M].上海:同济大学出版社,2002.
[8]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.WU Xiao-han,LXi-lin.Nonlinear finite element analysis of reinforced concrete slit shear wall under cyclic loading[J].Journal of Tongji University,1996,24(2):117-123.
[9]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,6:33-37.YANG pu,LI Ying-min,LAI Ming.A new method for selecting inputting waves for time-history analysis[J].China Civil Engineering Journal,2000,6:33-37.
[10]杨红,任小军,徐海英.双向水平地震下时程分析法中输入波的选择[J].华南理工大学学报(自然科学版),2010,11:40-46.YANG Hong,REN Xiao-jun,XU Hai-ying.Selection of input waves in time-history analysis under bi-direction horizontal seimic action[J].Journal of South China Univesity of Technology,2010,11:40-46.
[11]肖明葵,刘纲,白绍良.基于能量反应的地震动输入选择方法讨论[J].世界地震工程,2006,3:89-94.XIAO Ming-kui,LIU Gang,BAI Shao-liang.Some methods of selecting earthquake wave based on energy response[J].World Earthquake Engineering,2006,3:89-94.
[12]姚振刚,刘祖华.结构抗震试验[M].上海:同济大学出版社,1996.
[13]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003,19(3):30-33.ZHOU Ying,LU Wen-sheng,LU Xilin,Practical model design method of shaking table tests[J].Structural Engineers,2003,19(3):30-33.
[14]周颖,张翠强,吕西林.振动台试验中地震动选择及输入顺序研究[J].地震工程与工程振动,2012,32(6):32-37.ZHOU Ying,ZHANG Cui-qiang,LU Xi-lin.Method of ground motion selection and input in shaking table tests[J].Earthquake Engineering and Engineering Vibration,2012,32(6):32-37.
[2]Das S,Nau M.Seisimic design aspects of Vertical irregular reinforced concrete buildings[J].Earthquake Spectra,2003,19:455-477.
[3]JGJ 3-2010高层建筑混凝土结构技术规程[S].北京:中国建筑工业出版社,2010.
[4]GB 50011-2010建筑抗震设计规范[S].北京:中国建筑工业出版社,2010.
[5]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.
[6]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.
[7]吕西林,金国芳,吴晓涵.钢筋混凝土非线性有限元理论与应用[M].上海:同济大学出版社,2002.
[8]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.WU Xiao-han,LXi-lin.Nonlinear finite element analysis of reinforced concrete slit shear wall under cyclic loading[J].Journal of Tongji University,1996,24(2):117-123.
[9]杨溥,李英民,赖明.结构时程分析法输入地震波的选择控制指标[J].土木工程学报,2000,6:33-37.YANG pu,LI Ying-min,LAI Ming.A new method for selecting inputting waves for time-history analysis[J].China Civil Engineering Journal,2000,6:33-37.
[10]杨红,任小军,徐海英.双向水平地震下时程分析法中输入波的选择[J].华南理工大学学报(自然科学版),2010,11:40-46.YANG Hong,REN Xiao-jun,XU Hai-ying.Selection of input waves in time-history analysis under bi-direction horizontal seimic action[J].Journal of South China Univesity of Technology,2010,11:40-46.
[11]肖明葵,刘纲,白绍良.基于能量反应的地震动输入选择方法讨论[J].世界地震工程,2006,3:89-94.XIAO Ming-kui,LIU Gang,BAI Shao-liang.Some methods of selecting earthquake wave based on energy response[J].World Earthquake Engineering,2006,3:89-94.
[12]姚振刚,刘祖华.结构抗震试验[M].上海:同济大学出版社,1996.
[13]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003,19(3):30-33.ZHOU Ying,LU Wen-sheng,LU Xilin,Practical model design method of shaking table tests[J].Structural Engineers,2003,19(3):30-33.
[14]周颖,张翠强,吕西林.振动台试验中地震动选择及输入顺序研究[J].地震工程与工程振动,2012,32(6):32-37.ZHOU Ying,ZHANG Cui-qiang,LU Xi-lin.Method of ground motion selection and input in shaking table tests[J].Earthquake Engineering and Engineering Vibration,2012,32(6):32-37.
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