高位转换消能减震结构振动台试验研究
|
摘要
某超限高层建筑采用钢筋混凝土框架-剪力墙结构,存在高位转换层,其楼板平面开洞尺寸过大,造成楼板平面刚度不连续。弹性分析时,楼层竖向构件最大水平位移与楼层水平位移平均值之比为1.31,属结构扭转不规则,为此结构设计采用了软钢阻尼器来提供附加刚度及阻尼。为研究该高层建筑结构抗震性能,进行了1∶20缩尺模型的振动台试验,获得了模型结构的动力特性及在地震作用下的动力反应,分析了原型结构的地震反应。试验及分析结果表明,该结构满足现行建筑抗震设计规范的抗震设防要求;阻尼器减小了结构的扭转反应,对加速度反应起到了一定的减小作用;转换层上刚度变化较大,应逐步减缓刚度变化,改善相邻楼层的延性;出屋面层的鞭梢效应严重,应重视出屋面层的抗震设计。
A frame shear-wall RC structure is very complex which has high-level transfer story and large openings on the floor.The energy dissipation devices are also employed to improve its torsional behavior.To study its seismic behavior,a scaled model(1/20) was made and tested on the shaking table.In this paper,dynamic characteristics of the scaled model and its response under earthquake were investigated.Then the seismic response of prototype structure was analyzed.The test results show that the structure meets the requirements specified in the Chinese Design Code.The dampers reduce the torsional and acceleration response.The stiffness of upper transfer story should be changed slightly.The ductility of adjacent stories needs to be improved.The seismic design of the top story should be strengthened to reduce whipping effect.
A frame shear-wall RC structure is very complex which has high-level transfer story and large openings on the floor.The energy dissipation devices are also employed to improve its torsional behavior.To study its seismic behavior,a scaled model(1/20) was made and tested on the shaking table.In this paper,dynamic characteristics of the scaled model and its response under earthquake were investigated.Then the seismic response of prototype structure was analyzed.The test results show that the structure meets the requirements specified in the Chinese Design Code.The dampers reduce the torsional and acceleration response.The stiffness of upper transfer story should be changed slightly.The ductility of adjacent stories needs to be improved.The seismic design of the top story should be strengthened to reduce whipping effect.
引文
[1]JGJ 3—2002高层建筑混凝土结构技术规程[S].(JGJ 3—2002 Technical specifications for concretestructures of tall building[S].(in Chinese))
[2]GB 50011—2001建筑抗震设计规范[S].(GB50011—2001 Code for seismic design of buildings[S].(in Chinese))
[3]吴从晓.高位转换耗能减震结构体系分析研究[D].广州:广州大学,2007.(WU Congxiao.A newsystem of high-level transfer structure with energydissipated device[D].Guangzhou:GuangzhouUniversity,2007.(in Chinese))
[4]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.(ZHU Bolong.Seismic test of structure[M].Beijing:Seismological Press,1989.(in Chinese))
[5]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.(LU Xilin.Seismic theoryof complex high-rise buildings with application[M].Beijing:Science Press,2007.(in Chinese))
[6]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):30-33,38.(ZHOU Ying,LU Wensheng,LU Xilin.Practical modeldesign method of shaking table tests[J].StructuralEngineers,2003,19(3):30-333,8.(in Chinese))
[7]吕西林,孟春光,田野,等.消能减震高层方钢管混凝土框架结构振动台试验研究和弹塑性时程分析[J].地震工程与工程振动,2006,26(4):231-238.(LU Xilin,MENG Chunguang,TIAN Ye,et al.Shaking table test and elasto-plastic time historyanalysis of a high-rise CFRT frame structure withdampers[J].Earthquake Engineering and EngineeringVibration,2006,26(4):231-238.(in Chinese))
[2]GB 50011—2001建筑抗震设计规范[S].(GB50011—2001 Code for seismic design of buildings[S].(in Chinese))
[3]吴从晓.高位转换耗能减震结构体系分析研究[D].广州:广州大学,2007.(WU Congxiao.A newsystem of high-level transfer structure with energydissipated device[D].Guangzhou:GuangzhouUniversity,2007.(in Chinese))
[4]朱伯龙.结构抗震试验[M].北京:地震出版社,1989.(ZHU Bolong.Seismic test of structure[M].Beijing:Seismological Press,1989.(in Chinese))
[5]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.(LU Xilin.Seismic theoryof complex high-rise buildings with application[M].Beijing:Science Press,2007.(in Chinese))
[6]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):30-33,38.(ZHOU Ying,LU Wensheng,LU Xilin.Practical modeldesign method of shaking table tests[J].StructuralEngineers,2003,19(3):30-333,8.(in Chinese))
[7]吕西林,孟春光,田野,等.消能减震高层方钢管混凝土框架结构振动台试验研究和弹塑性时程分析[J].地震工程与工程振动,2006,26(4):231-238.(LU Xilin,MENG Chunguang,TIAN Ye,et al.Shaking table test and elasto-plastic time historyanalysis of a high-rise CFRT frame structure withdampers[J].Earthquake Engineering and EngineeringVibration,2006,26(4):231-238.(in Chinese))
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