豎向地震作用下雙塔連體結(jié)構(gòu)非線性時(shí)程分析*
韋曉棟,吳曉涵,錢江,呂西林
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韋曉棟,吳曉涵,錢江,呂西林 (同濟(jì)大學(xué)結(jié)構(gòu)工程與防災(zāi)研究所,上海 200092)
[摘要]地震作用下雙塔連體結(jié)構(gòu)體系的變形和內(nèi)力分布較為復(fù)雜,結(jié)構(gòu)中設(shè)置的連體部分在一定程度上會(huì)提高豎向地震作用對結(jié)構(gòu)的影響。針對某一頂部連體雙塔結(jié)構(gòu),采用NosaCAD有限元軟件建立結(jié)構(gòu)的整體非線性分析模型。對計(jì)算模型進(jìn)行輸入水平向、豎直向地震波和只輸入水平向地震波兩種不同工況的動(dòng)力時(shí)程分析,通過對比兩種工況下結(jié)構(gòu)的動(dòng)力響應(yīng),研究豎向地震對該連體結(jié)構(gòu)地震反應(yīng)的影響。分析表明:豎向地震作用對結(jié)構(gòu)的水平位移基本沒有影響,對結(jié)構(gòu)豎向位移有一定影響,但影響較??;豎向地震作用對連體部分跨中桿件的內(nèi)力有一定影響。[關(guān)鍵詞]雙塔連體結(jié)構(gòu);豎向地震;時(shí)程分析;抗震性能中圖分類號:TU973.14,TU311.41文獻(xiàn)標(biāo)識碼:A文章編號:1002-848X(2012)06-0121-06Research on nonlinear time-history response of a multi-tower connected structure subjected to vertical earthquake motionWei Xiaodong, Wu Xiaohan, Qian Jiang, Lü Xilin(Research Institute of Structure Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China)Abstract: The deformations and the internal forces of the multi-tower connected structure (MTCS) under earthquake are very complicated. The effect of vertical seismic motion to the MTCS will be magnified in a certain extent for the connecting structure. The model of a MTCS was established by NosaCAD, which mainly composed of the nonlinear elements. The analysis of the structure model was carried out in two cases of seismic wave input, one with both horizontal and vertical wave inputs and the other with horizontal input only. By comparing the results of the structure response under two cases, the effect of vertical seismic motion to the MTCS was investigated. The results show that the vertical seismic has no effect on the horizontal displacement of the structure and little effect on the vertical displacement of the structure. The vertical seismic has some influence on the internal forces in the middle of the connecting structure.Keywords: multi-tower connected structure; vertical earthquake; time history analysis; seismic behavior*國家自然科學(xué)基金項(xiàng)目(90815029),國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃973項(xiàng)目(2007CB714202)。作者簡介:韋曉棟,碩士,Email:wxd_19871222@163.com.參考文獻(xiàn)[1]黃志華,呂西林,周穎,等. 雙塔連體結(jié)構(gòu)的模擬地震振動(dòng)臺模型試驗(yàn)研究[J]. 建筑結(jié)構(gòu)學(xué)報(bào),2009,30(5):31-38.[2]JGJ 3—2002高層建筑混凝土結(jié)構(gòu)技術(shù)規(guī)程[S]. 北京:中國建筑工業(yè)出版社,2002.[3]GB 50011—2001 建筑抗震設(shè)計(jì)規(guī)范[S]. 北京:中國建筑工業(yè)出版社,2001.[4]同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室. 舟山市普陀區(qū)東港商務(wù)中心1、2#樓結(jié)構(gòu)模型模擬地震振動(dòng)臺試驗(yàn)研究報(bào)告[R].上海:同濟(jì)大學(xué),2008.[5]孫宗鵬,錢江. 頂部高位連體結(jié)構(gòu)抗震性能數(shù)值模擬分析[J]. 結(jié)構(gòu)工程師,2009,25(6):93-97.[6]辛婭云. 豎向地震作用的重要性[J]. 工程抗震與加固改造,2005,12(6):48:50.[7]顧祥林,孫飛飛. 混凝土結(jié)構(gòu)的計(jì)算機(jī)仿真[M]. 上海:同濟(jì)大學(xué)出版社,2002.[8]呂西林. 復(fù)雜高層建筑結(jié)構(gòu)抗震理論與應(yīng)用[M]. 北京:科學(xué)出版社,2007.[9]呂西林,金國芳,吳曉涵. 鋼筋混凝土結(jié)構(gòu)非線性有限元理論與應(yīng)用[M]. 上海:同濟(jì)大學(xué)出版社,2002.[10]龍志飛,岑松. 有限元法新論:原理·程序·進(jìn)展[M]. 北京:中國水利水電出版社,2001.[11]DARWIN D, PECKNOLD D A. Analysis of RC shear panels under cyclic loading[J]. Journal of the Structural Division,ASCE, 1976, 102(2): 355-369.[12]吳曉涵,呂西林. 反復(fù)荷載下混凝土剪力墻非線性有限元分析[J]. 同濟(jì)大學(xué)學(xué)報(bào),1996,24(2):117-123.[13]傅金華. 建筑抗震設(shè)計(jì)及實(shí)例——建筑結(jié)構(gòu)的設(shè)計(jì)及彈塑性反應(yīng)分析[M]. 北京:中國建筑工業(yè)出版社,2008.[14]孫方濤,吳曉涵,呂西林.豎向地震作用下某大跨懸挑結(jié)構(gòu)反應(yīng)分析[J].結(jié)構(gòu)工程師,2009,25(4):71-77.[15]吳曉涵,駱劍鋒,馬莉.豎向地震作用下混凝土框架結(jié)構(gòu)抗震性能研究[J].結(jié)構(gòu)工程師,2006,22(6):37-43.[16]熊偉,韓建強(qiáng),吳敏哲. 大跨度張弦桁架豎向地震作用下動(dòng)力特性研究[J]. 建筑結(jié)構(gòu),2008, 38(2): 50-53.
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