- 摘 要
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（1 同濟大學預應力研究所， 上海 200092； 2 南寧市建筑設計院， 南寧 530022； 3 同濟大學先進土木工程材料教育部重點實驗室，上海 200092； 4 華東建筑設計研究總院， 上海 200002）
［摘要］國家會展中心采用預應力混凝土框架承重體系，柱網(wǎng)尺寸高達27m×36m，使用活荷載為15kN/m2，屬大跨重載結構。其結構單體尺寸長達297m，在計算地震作用時，行波效應的影響不容忽視。采用MIDAS/Gen軟件進行彈性水平地震時程分析，采用多點激勵的方法，對國家會展中心預應力框架結構的底層框架柱、2層樓面梁、樓板等主要構件的內力分布進行分析，并對比不同視波速的影響。結果表明，對于位于結構邊緣的構件，行波效應帶來的不利影響較大，在設計時需要予以考慮。
［關鍵詞］國家會展中心； 預應力； 行波效應； 多點激勵； 大跨度； 超長
中圖分類號：TU378-2文獻標識碼：A文章編號：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
*國家自然科學基金資助項目（５１１７８３２８，５１５７８４００）,上海市科學技術委員會科研計劃 (13231200903)。
通訊作者：熊學玉，博士，教授，博士生導師，Email：xueyu@#edu.cn。
