7度区超限高层框筒结构受拉墙体抗震性能分析  

Seismic performance analysis of tensile wall in frame-corewall structure of out-of-code high-rise building in 7-level seismic intensity area

作　　者：焦柯[1] 陈星[1] 吴桂广[1] 贾苏 欧旻韬[1] Jiao Ke Chen Xing Wu Guiguang Jia Su Ou Mintao(Architectural Design and Research Institute of Guangdong Province, Guangzhou 510010, China)

机构地区：[1]广东省建筑设计研究院,广州510010

出　　处：《建筑结构》2017年第1期33-36,54,共5页Building Structure

摘　　要：对7度区12栋超限高层框筒结构中震下主要墙肢拉应力比进行统计,名义最大拉应力比在1.0~2.5之间,在结构设计可控范围内。在高层结构中震计算中应采用未经放大的楼层地震标准组合内力判断剪力墙的受拉程度。对核心筒偏置的超限结构进行抗震性能分析,发现拉应力较大的墙肢在大震作用下出现拉剪或拉弯破坏;根据墙肢拉力配置型钢后,改善了结构底部剪力墙的抗震性能,墙肢未出现剪切破坏和拉弯破坏。进一步的精细有限元分析表明,加型钢后受拉墙肢的抗拉和抗剪能力明显提高。当中震作用下超高层结构的底部墙肢名义拉应力比超过2.0时,可通过加型钢或钢板来满足抗震性能要求,而且型钢或钢板截面面积应适当增大。Tensile stress ratios of the main walls in frame-corewall structure of 12 out-of-code high-rise buildings in 7-level seismic intensity area under the fortification earthquake were counted, and the maximum nominal tensile stress ratio was between 1.0 - 2. 5 and was in the controllable range of the structure design. In seismic calculation of the high-rise structure under the fortification earthquake, non-amplified floor seismic standardized combined internal forces should be adopted to judge the tension degree of shear walls. The seismic performance analysis was conducted on the out-of-code structure with eccentrically set corewall, and the tensile-shear or tensile-bending failures are observed in walls with lager tensile stress under the rare earthquakes. After steel section is arranged in wall according to wall tensile result, the seismic performance of shear wall at the bottom of the structure improves and there is no shear failure or tensile-bending failure. Further detailed finite element analysis shows that tensile and shear capacity of the wall adding steel section improve significantly. When nominal tensile stress ratio of the bottom shear wall in super high-rise structure is more than 2. 0 under the rare earthquake, the requirements of seismic performance can be met by adding steel section or steel plate, and section area of steel section or steel plate should be appropriately increased.

关 键 词：超限高层建筑 框筒结构 受拉墙体 抗震性能 

分 类 号：TU352[建筑科学—结构工程]