超長鋼屋蓋多維多點輸入的地震響應(yīng)分析
羅小龍1，2，童樂為1，高永剛3，諸福華3
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(1 同濟大學(xué)建筑工程系，上海 200092；2 中國建筑西南設(shè)計研究院有限公司，成都 610041；3 上海同清科技發(fā)展有限公司，上海 200042)［摘要］ 采用時程分析法對某超長鋼屋蓋進行了考慮行波效應(yīng)的多維多點輸入下的地震響應(yīng)分析，考察了多維多點輸入對結(jié)構(gòu)的基底剪力、扭轉(zhuǎn)效應(yīng)和構(gòu)件內(nèi)力的影響，探討了結(jié)構(gòu)地震響應(yīng)規(guī)律與地震波傳播速度的關(guān)系。研究結(jié)果表明：隨著地震波傳播速度的減小，多維多點輸入下結(jié)構(gòu)的基底剪力逐漸減小而扭轉(zhuǎn)效應(yīng)逐漸增大；不同類型的鋼屋蓋構(gòu)件受多維多點輸入影響程度不同，其中縱向桁架弦桿的響應(yīng)最大，橫向桁架弦桿的響應(yīng)最小。不同類型構(gòu)件的行波效應(yīng)影響系數(shù)主要分布在1.17~1.51之間。［關(guān)鍵詞］超長鋼屋蓋; 行波效應(yīng); 多維多點; 時程分析中圖分類號：TU311.3 文獻標識碼：A 文章編號：1002-848X(2014)21-0051-06Seismic response analysis of a super-long steel roof under multi-dimension and multi-support excitationLuo Xiaolong1,2, Tong Lewei1, Gao Yonggang3, Zhu Fuhua3(1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610041, China; 3 Shanghai Topking Science and Technology Development Co., Ltd., Shanghai 200042, China)Abstract: Time-history seismic analysis of a super-long steel roof structure is carried out considering traveling wave effect under multi-dimension and multi-support excitation. The effect of multi-dimension and multi-support excitation was investigated on the total base shear force, torsion effect and internal force of steel members. The relationship between seismic response of the structure and seismic wave velocity was discussed. The research results show that under multi-dimension and multi-support excitation, the total base shear force decreases, but the torsion effect increases, as the travelling wave velocity becomes slow. Multi-dimension and multi-support excitation has different influence on different types of structural members in the steel roof. The response of the chords in the longitudinal truss is the largest while the response of the chords in the lateral truss is the smallest. The traveling wave effect coefficients of the different types of members are mainly between 1.17and 1.51.Keywords: super-long steel roof; traveling wave effect; multi-dimension and multi-support; time-history analysis作者簡介：羅小龍，碩士，Email: lxl163yx@163.com。參考文獻[1]GB 50011—2010建筑抗震設(shè)計規(guī)范[S].北京:中國建筑工業(yè)出版社,2010.[2]建質(zhì)[2010]109號 超限高層建筑工程抗震設(shè)防專項審查技術(shù)要點 [S]. 2010.[3]周定松,肖克艱,陳志強.成都雙流國際機場T2航站樓大廳多點多維彈性地震反應(yīng)分析[J].建筑結(jié)構(gòu),2010，40(9): 14-19.[4]王文淵,張同億,李云,等.石家莊國際會展中心地震動多點輸入研究[J]. 建筑結(jié)構(gòu), 2013,43(3): 36-39.[5]李永華,李思明.多維多點激勵下某多塔連體結(jié)構(gòu)地震反應(yīng)分析[J].土木工程學(xué)報, 2011, 44(4): 98-104.[6]張勝,甘明,李華峰.南京南站鋼結(jié)構(gòu)的彈塑性與多點多維地震輸入分析[J]. 建筑結(jié)構(gòu), 2009, 39(12): 79-82.[7]甄偉,李志東,高昂,等.廣州新客站結(jié)構(gòu)多點輸入地震反應(yīng)分析[J]. 建筑結(jié)構(gòu), 2009, 39(12): 28-32.[8]ZERVA A. Response of multi-span beams to spatially incoherent seismic ground motions [J].Earthquake Engineering & Structural Dynamic,1990,19(6):819-832.[9]DER KIUREGHIAN ARMEN, NEUENHOFER ANSGAR. Response spectrum method for multi-support seismic excitations [J]. Earthquake Engineering & Structural Dynamic, 1992, 21(8): 713-740.[10]李吉濤,楊慶山. 地震波基線漂移的處理方法[J]. 北京交通大學(xué)學(xué)報：自然科學(xué)版,2010,34(1):95-99.[11]林家浩,張亞輝,趙巖.大跨度結(jié)構(gòu)抗震分析方法及近期進展[J]. 力學(xué)進展,2001,31(3):350-360.
