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（北京市建筑設(shè)計研究院，北京 100045）

［摘要］廣州新客站的站房和雨棚結(jié)構(gòu)均為結(jié)構(gòu)體系復(fù)雜的超長結(jié)構(gòu)，對其進行了考慮地震行波效應(yīng)的多維多點輸入地震反應(yīng)分析，并與一致輸入的結(jié)果進行對比?？疾炝硕帱c輸入地震對結(jié)構(gòu)的扭轉(zhuǎn)效應(yīng)、構(gòu)件內(nèi)力的影響，研究了地震行波效應(yīng)影響系數(shù)的分布規(guī)律和影響因素。站房結(jié)構(gòu)多點輸入下扭轉(zhuǎn)效應(yīng)增大明顯，但絕對數(shù)值并不大。大多數(shù)豎向構(gòu)件在多點地震輸入下的反應(yīng)小于在一致激勵地震輸入下的反應(yīng)，行波效應(yīng)影響系數(shù)較大的構(gòu)件主要為結(jié)構(gòu)的邊柱和角柱。屋蓋結(jié)構(gòu)行波效應(yīng)影響系數(shù)分布規(guī)律與屋蓋結(jié)構(gòu)形式和質(zhì)量分布有較大關(guān)系。地震波視波速較小時，結(jié)構(gòu)在多點輸入下的非同步性更加明顯，反映為基底總剪力峰值較小，扭轉(zhuǎn)效應(yīng)更大，地震行波效應(yīng)影響系數(shù)更大。分析結(jié)果為結(jié)構(gòu)設(shè)計中考慮多點輸入影響提供了依據(jù)。

［關(guān)鍵詞］超長結(jié)構(gòu);多點輸入;地震反應(yīng)分析;行波效應(yīng)影響系數(shù)

Time-history analysis of New Guangzhou Railway Station under multi-support seismic excitation

Zhen Wei, Li Zhidong, Gao Ang, Sheng Ping(Beijing Institute of Architectural Design, Beijing 100045, China)

Abstract:The structure of New Guangzhou Railway Station is complicate and over-length. The time-history seismic analysis considering traveling effect and double direction input is carried out, and the result is compared with that of single-support excitation analysis. The torsion effect and internal force of important members, the distribution and influence of wave traveling effect factor are studied. The torsion effect increases obviously, though the absolute effect result is not huge. The response of most of the vertical members under multi-support seismic excitation is less than that under single-support excitation, and the members on which multi-support excitation has great effect are generally edge columns or corner columns. The distribution of effect factor on roof members is decided by the structure type and mass distribution. When the traveling velocity decreases, the synchronization under multi-support seismic excitation decreases too. It is shown that the basement shear force decreases, torsion effect increases and the wave traveling effect factor increases. The analysis results provide basis for the consideration of multi-support excitation in large-sized structure design.

Keywords:long-span structure; multi-support excitation; seismic response analysis; wave traveling effect factor

作者簡介：甄偉，碩士，高級工程師，Email：zhenw@biad.com.cn。

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