国家会展中心大跨预应力混凝土框架水平地震行波效应影响分析  

Traveling wave effect analysis of large-span prestressed concrete frame structure of National Exhibition and Convention Center under horizontal earthquake

作　　者：陆宣行 熊学玉[1,3] 方义庆 Lu Xuanxing;Xiong Xueyu;Fang Yiqing(Institute of Prestressed Structures, Tongji University, Shanghai 200092, China;Nanning Institute of Architecture Design, Nanning 530022, China;Key Laboratory of Advanced Civil Engineering Materials（Tongji University） , Ministry of Education, Shanghai 200092, China;East China Architectural Design ＆ Research Institute, Shanghai 200002, China)

机构地区：[1]同济大学预应力研究所,上海200092 [2]南宁市建筑设计院,南宁530022 [3]同济大学先进土木工程材料教育部重点实验室,上海200092 [4]华东建筑设计研究总院,上海200002

出　　处：《建筑结构》2018年第8期60-64,共5页Building Structure

基　　金：国家自然科学基金资助项目(51178328,51578400);上海市科学技术委员会科研计划(13231200903)

摘　　要：国家会展中心采用预应力混凝土框架承重体系,柱网尺寸高达27m×36m,使用活荷载为15k N/m2,属大跨重载结构。其结构单体尺寸长达297m,在计算地震作用时,行波效应的影响不容忽视。采用MIDAS/Gen软件进行弹性水平地震时程分析,采用多点激励的方法,对国家会展中心预应力框架结构的底层框架柱、2层楼面梁、楼板等主要构件的内力分布进行分析,并对比不同视波速的影响。结果表明,对于位于结构边缘的构件,行波效应带来的不利影响较大,在设计时需要予以考虑。The bearing system of National Exhibition and Convention Center adopts prestressed concrete frame structure,with column grid size of 27 m × 36 m and live load of 15 k N/m2. It belongs to large-span heavy load structure. The single structure has dimension of 297 m,so the traveling wave effect cannot be ignored in calculating the seismic effect.MIDAS/Gen software was used to conduct elastic horizontal earthquake time-history analysis. Multi-support excitation method was used to analyze internal force distribution of main components of bottom layer frame column,beams and slabs of second floor of prestressed concrete frame structure of National Exhibition and Convention Center,and influences of different apparent wave velocities were compared. Results show that adverse influence of traveling wave effect is large on components at edge of the structure,which should be taken into consideration in design.

关 键 词：国家会展中心 预应力 行波效应 多点激励 大跨度 超长 

分 类 号：TU378.2[建筑科学—结构工程]