平面凹凸不规则高层结构弱连接楼盖在水平地震作用下的受力特性  

Mechanical behavior of weakly connected diaphragm of high⁃rise structure with concave convex irregular plan under horizontal earthquake action

作　　者：魏琏 罗嘉骏 王森 WEI Lian;LUO Jiajun;WANG Sen(Shenzhen Li Peng Engineering Research Structural Design Co.,Ltd.,Shenzhen 518034,China)

机构地区：[1]深圳力鹏工程研究结构设计事务所有限公司,深圳518034

出　　处：《建筑结构》2023年第22期1-5,共5页Building Structure

摘　　要：平面凹凸不规则高层建筑由中心区和若干个伸出单肢连通过“弱连接楼盖”连接组成。由于单肢结构刚度较弱,一般不能独立存在,因此弱连接楼盖是保证单肢结构能够与其他部位结构共同工作抵御风和地震作用的关键构件。由于现行规范对这一问题尚无相关内容和规定,采用弹性有限元方法对这类结构在水平地震作用下的计算进行分析,揭示楼盖弱连接部位在水平地震作用下的受力特点,提出相应的设计建议。结果表明:弱连接楼盖单肢端截面在地震作用下不但产生了剪力,同时还产生轴拉力以及相应的面内弯矩,截面内力在顶部楼层最大,中高部楼层面内剪力较小,应重视弱连接部位面内轴拉力和弯矩,考虑双向地震作用并加强相应措施。The high-rise building with concave convex irregular plan is composed of a central area and several wings connected by“weakly connected diaphragm”.Because the stiffness of the wing structure is relatively weak,it generally cannot exist independently.Therefore,the weakly connected diaphragm is a key component to ensure that the wing structure can work with other structural parts to resist wind and earthquake effects.Since the current code do not have relevant content and regulations on this issue,the elastic finite element method was used to analyze the colculation of this type of structure under horizontal earthquake action,reveal the mechanical behavior of the weakly conneeted diaphragm under horizontal earthquake action,and propose corresponding design suggestions.The results show that the wing section of the weakly connected diaphragm not only generates shear force,but also generates axial tension and the corresponding in-plane bending moment under earthquake action.The internal force of the section is the largest in the top floor,while the in-plane shear force in the middle and high floors is small.Therefore,attention should be paid to the in-plane axial tension and bending moment of the weak connected parts,and appropriate measures should be taken to adjust and consider the bidirectional seismic action and strengthen the corresponding measures.

关 键 词：平面凹凸不规则 弱连接楼盖 水平地震作用 抗侧性能 受力特性 弹性有限元法 

分 类 号：TU318[建筑科学—结构工程]