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（1 中國(guó)航空規(guī)劃設(shè)計(jì)研究總院有限公司， 北京 100120；2 清華大學(xué)建筑設(shè)計(jì)研究院有限公司， 北京 100084）

［摘要］成都金控廣場(chǎng)A，B座為非對(duì)稱連體高層結(jié)構(gòu)，兩座塔樓層數(shù)及層高均相同，但平面尺寸及剛度差異明顯，兩座塔樓在16～20層通過鋼桁架剛性連接形成連體結(jié)構(gòu)。對(duì)比分析了單塔結(jié)構(gòu)及連體結(jié)構(gòu)的動(dòng)力特性，并進(jìn)行多模型對(duì)比確定彈塑性分析模型的精確性，利用有限元軟件ABAQUS進(jìn)行連體結(jié)構(gòu)大震彈塑性動(dòng)力時(shí)程分析。采用基于材料本構(gòu)的纖維模型，“宏觀”上分析大震下連體結(jié)構(gòu)彈塑性變形并與單塔結(jié)構(gòu)進(jìn)行對(duì)比，分析大震彈塑性時(shí)程及大震彈性時(shí)程的地震剪力，并進(jìn)行能量響應(yīng)分析，得到結(jié)構(gòu)在大震下的能量反應(yīng)規(guī)律； “微觀”上對(duì)結(jié)構(gòu)關(guān)鍵部位及構(gòu)件進(jìn)行抗震性能評(píng)價(jià)，得到了剪力墻、關(guān)鍵樓板及結(jié)構(gòu)連體區(qū)構(gòu)件的損傷及屈服狀態(tài)，對(duì)結(jié)構(gòu)及構(gòu)件進(jìn)行大震下抗震性能安全評(píng)價(jià)，針對(duì)薄弱部位提出抗震加強(qiáng)措施，以優(yōu)化設(shè)計(jì)。

［關(guān)鍵詞］非對(duì)稱連體結(jié)構(gòu)； 大震彈塑性分析； 抗震性能； 結(jié)構(gòu)耗能

中圖分類號(hào)：TU973+.31文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)21-0053-07

Elastoplastic analysis and seismic performance evaluation of an asymmetric connected structure under rare earthquakes

SONG Maomao1, MA Botao1, YANG Xiao2

(1 China Aviation Planning and Design Institute (Group) Co., Ltd., Beijing 100120, China; 2 Architectural Design & Research Institute of Tsinghua University Co., Ltd., Beijing 100084, China)

Abstract:Chengdu Jinkong Square Tower A，B is an asymmetric connected high-rise structure. The number of floors and height of the two towers are the same, but the difference in plane size and stiffness is obvious. The two towers are rigidly connected by steel trusses on the 16th to 20th floors to form a connected structure. The dynamic characteristics of single tower structure and the connected structure were compared and analyzed, and the accuracy of the elasto-plastic analysis model was determined by the comparison of multiple models. The finite element software ABAQUS was used to analyze the elastoplastic dynamic time history of rare earthquakes of the connected structure. The fiber model based on material constitutive was used to do the macroscopic analysis. The overall response of the elastoplastic deformation of the connected structure under rare earthquakes was analyzed and compared with the single tower structure. The seismic shear force in the elastoplastic and elastic time history of rare earthquakes were analyzed. The energy response analysis was carried out to obtain the energy response law of the structure under the rare earthquakes. The seismic performance of the key parts and components of the structure was evaluated on the microscopic level, and the damage and yielding status of shear walls, key floor slabs and components in the structural conjoined area were obtained, and seismic performance safety evaluation of the structure and the components under rare earthquakes was carried out. Anti-seismic strengthening measures were proposed for weak parts to optimize the structural design.

Keywords:asymmetric connected structure; rare earthquake elastoplastic analysis; seismic performance; structural energy consumption

*北京市科技新星項(xiàng)目計(jì)劃資助項(xiàng)目（Z171100001117087）。

作者簡(jiǎn)介：宋毛毛，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email: 544166780@qq.com。