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(中衡設(shè)計集團(tuán)股份有限公司, 蘇州 215123)
摘要: 對于空間跨度較大的結(jié)構(gòu),行波效應(yīng)對其地震響應(yīng)的影響不可忽略,但目前對于超長連體結(jié)構(gòu)的行波效應(yīng)研究較少. 蘇州國際會議酒店為結(jié)構(gòu)總長度 333m 的超長連體結(jié)構(gòu),連廊與塔樓之間采用鉛芯橡膠支座與黏滯阻尼器實(shí)現(xiàn)柔性連接. 以該項(xiàng)目為背景,研究行波效應(yīng)對該類結(jié)構(gòu)地震響應(yīng)的影響. 首先應(yīng)用了行波效應(yīng)視波速的簡化計算方法,給出了國內(nèi)場地視波速的參考取值范圍. 考慮不同視波速對蘇州國際會議酒店進(jìn)行多點(diǎn)激勵地震彈塑性時程分析,重點(diǎn)研究一致激勵與多點(diǎn)激勵下的地震剪力、位移、加速度與支座性能差異性. 結(jié)果表明:多點(diǎn)激勵下結(jié)構(gòu)樓層剪力小于一致激勵,其差距隨視波速的降低而增大,多點(diǎn)激勵下基底剪力最大減小 15%?結(jié)構(gòu)層間位移角可滿足規(guī)范要求,底部樓層多點(diǎn)激勵層間位移角大于一致激勵,其差異隨視波速的降低而增大?考慮行波效應(yīng)時連廊扭轉(zhuǎn)效應(yīng)顯著提高,而連廊加速度有所降低?鉛芯橡膠支座側(cè)向位移可滿足設(shè)計變形需求,其在多點(diǎn)激勵下的側(cè)向位移大于一致激勵?行波效應(yīng)亦對黏滯阻尼器附加給結(jié)構(gòu)的阻尼比有一定影響.
關(guān)鍵詞: 超長連體結(jié)構(gòu);行波效應(yīng);視波速;多點(diǎn)激勵;鉛芯橡膠支座;地震響應(yīng)
中圖分類號:TU318+. 1 文獻(xiàn)標(biāo)志碼:A 文章編號:1002-848X(2022)20-0022-07
DOI:10.19701 / j.jzjg.ZJ220004
Study on the influence of traveling wave effect for ultra-long connected structure
YANG Lülei, SUN Yibin, GONG Minfeng, YANG Dong
(ARTS Group Co. , Ltd. , Suzhou 215123, China)
Abstract: For structures with large spatial span, the influence of traveling wave effect on its seismic response cannot beignored, but there are few studies on traveling wave effect of ultra-long connected structures at present. Suzhou InternationalConference Hotel is an ultra-long connected structure with a total length of 333m, where lead rubber bearings and viscousdampers are used for flexible connection between the corridor and towers. Taking this project as the background, theinfluence of traveling wave effect on the seismic response of such structures were studied. Firstly, a simplified calculationmethod for apparent wave velocity of traveling wave effect was applied, and a reference range of apparent wave velocity fordomestic sites was provided. Then elastoplastic seismic time history analysis of Suzhou International Conference Hotel undermulti-point excitation with different apparent wave velocities was carried out, which focuses on the difference of seismicshear force, displacement, acceleration and performance of the bearing supports under uniform excitation and multi-pointexcitation. The results show that the storey shear force under multi-point excitation is less than that under uniformexcitation, and the difference increases with the decrease of apparent wave velocity. The maximum reduction of base shearis 15%. The interlayer displacement angles can meet the specification requirements. The interlayer displacement angles ofthe bottom floors under uniform excitation are greater than those under multi-point excitation, and the differences increasewith the decrease of apparent wave velocity. The torsional effect of corridor increases remarkably when considering travelingwave effect, while the acceleration of corridor decreases. The lateral displacements of lead rubber bearings can meet therequirements of design deformations, and the lateral displacements under multi-point excitation are greater than those underuniform excitation. As well, the damping ratio that viscous dampers append to the structure is influenced by travelling waveeffect.
Keywords:ultra-long connected structure;traveling wave effect;apparent wave velocity;multi-point excitation;leadrubber bearing;seismic response
∗中衡設(shè)計集團(tuán)科研項(xiàng)目(2020-S1):建筑結(jié)構(gòu)抗震性能化設(shè)計技術(shù)研究與應(yīng)用.
第一作者:楊律磊,碩士,高級工程師,一級注冊結(jié)構(gòu)工程師,主要從事復(fù)雜結(jié)構(gòu)設(shè)計與技術(shù)研究工作,Email: yanglvlei@artsgroup. cn.
[引用本文] 楊律磊,孫意斌,龔敏鋒,等. 超長連體結(jié)構(gòu)地震行波效應(yīng)影響研究[J]. 建筑結(jié)構(gòu),2022,52(20):22-28. YANG Lülei,SUN Yibin,GONG Minfeng,et al. Study on the influence of traveling wave effect for ultra-long connectedstructure[J]. Building Structure,2022,52(20):22-28.
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