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王文淵，張同億，李云，張春俊，王若南

(中國中元國際工程公司，北京 100089)

 

［摘要］石家莊國際會(huì)展中心中央大廳東西向沿軸線長約800m，屬超長結(jié)構(gòu)。采用大質(zhì)量法對(duì)其進(jìn)行了地震作用的多向、多點(diǎn)、多維輸入分析研究，主要考察行波效應(yīng)對(duì)整體結(jié)構(gòu)反應(yīng)的影響，以及對(duì)地上鋼結(jié)構(gòu)樹形柱和Y形柱、框架柱與折板網(wǎng)架間的撐桿以及折板網(wǎng)架間的空間倒三角聯(lián)系桁架桿件內(nèi)力的影響。分析結(jié)果表明，地震動(dòng)多點(diǎn)輸入明顯降低了地上整體鋼結(jié)構(gòu)的基底剪力反應(yīng)，增大了各段鋼結(jié)構(gòu)的扭轉(zhuǎn)反應(yīng)。除折板網(wǎng)架外，地上鋼結(jié)構(gòu)的軸力及剪力平均超載比為1.2，彎矩的平均超載比為1.1～1.2。1段聯(lián)系桁架的軸力、Y向彎矩和Y向剪力以及3段框架柱與網(wǎng)架間撐桿的雙向剪力的平均超載比為1.3～1.4。

［關(guān)鍵詞］大跨空間鋼結(jié)構(gòu)；多點(diǎn)多維；時(shí)程分析；地震反應(yīng)

中圖分類號(hào)：TU311.3文獻(xiàn)標(biāo)識(shí)碼：A        文章編號(hào)：1002-848X(2013)03-0036-04

 

Wang Wenyuan, Zhang Tongyi, Li Yun, Zhang Chunjun, Wang Ruonan

(China IPPR International Engineering Corporation, Beijing 100089, China)

 

Abstract: Shijiazhuang International Convention and Exhibition Center has a super length of 800 meters along the west-east axis. By the big mass method, investigations have been made on effects of multi-direction, multi-support and three-dimension seismic excitations (MSSE) on the seismic response of the whole structure as well as on the internal forces of the tree or Y shaped columns of the up-ground steel structures, bracing elements between frame columns and folded plate space truss (FPST), the space inverse triangle linking trusses between FPSTs. The results show that the consideration of MSSE apparently reduces the base-shear response of the up-ground steel structure and increases the torsion displacements of its three parts. Statistics from analysis results revealed an average 10%～20% increase effect of MSSE on the internal forces of all members of up-ground steel structure excluding the roof spatial grid structure. It should be noted that the axial force, moment and shear force in Y direction of members of link trusses in Part 1 as well as the biaxial shear forces of brace elements between columns and the roof truss have an increase of 30%～40% effect of MSSE.

Keywords: long-span spatial steel structure; multi-support and three-dimension; time history analysis; seismic response

作者簡介：王文淵，博士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: wangwenyuan@ippr.net

 

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