（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）

［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15kN/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。

［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

中图分类号：TU378-2文献标识码：A文章编号：1002-848X(2018)08-0060-05

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

Lu Xuanxing1,2, Xiong Xueyu1，3, Fang Yiqing4

(1 Institute of Prestressed Structures, Tongji University, Shanghai 200092, China; 2 Nanning Institute of Architecture Design, Nanning 530022, China;  3 Key Laboratory of Advanced Civil Engineering Materials(Tongji University), Ministry of Education, Shanghai 200092, China;  4 East China Architectural Design & Research Institute, Shanghai 200002, China)

Abstract:The bearing system of National  Exhibition and Convention Center adopts prestressed concrete frame structure, with column grid size of 27m×36m and live load of 15kN/m2. It belongs to large-span heavy load structure. The single structure has dimension of 297m, 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.

Keywords:National  Exhibition and Convention Center; prestress; traveling wave effect; multi-support excitation; large span; super long

*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)。

通讯作者：熊学玉，博士，教授，博士生导师，Email：xueyu@tongji.edu.cn。