某連體高層結(jié)構(gòu)彈塑性時程分析
王 瑞1, 張曉光2, 黃 濤2
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(1 同濟大學(xué)建筑工程系， 上海 200092； 2 同濟大學(xué)建筑設(shè)計研究院（集團）有限公司， 上海 200092)[摘要] 項目由相距15.6m的2個高99m的主塔樓及高位連接體組成，采用框架-核心筒結(jié)構(gòu)體系。根據(jù)結(jié)構(gòu)特征、構(gòu)件部位及重要程度，針對不同設(shè)防水準(zhǔn)的地震作用，制定了抗震性能目標(biāo)。利用有限元軟件PERFORM-3D對其進行7度罕遇地震下的彈塑性時程分析，分析中使用非線性纖維模型來模擬剪力墻彈塑性性能。給出結(jié)構(gòu)變形及層間剪力、層傾覆力矩等整體計算結(jié)果，并對結(jié)構(gòu)主要抗側(cè)力構(gòu)件進行性能校核。分析結(jié)果表明，罕遇地震作用下，結(jié)構(gòu)的最大層間位移角滿足1/100的限值要求；結(jié)構(gòu)構(gòu)件損壞順序和分布較為合理，能在一定程度上耗散地震能量；構(gòu)件塑性發(fā)展?jié)M足預(yù)定的抗震性能目標(biāo)，結(jié)構(gòu)整體受力性能良好。[關(guān)鍵詞] 彈塑性時程分析； 非線性纖維模型； 連體高層結(jié)構(gòu)中圖分類號：TU318.2 文獻標(biāo)識碼：A 文章編號：1002-848X(2013)S2-0371-06作者簡介：王瑞，工學(xué)碩士，Email：strrxia@163.com。Nonlinear time-history analysis of a connected high-rise structureWang Rui1, Zhang Xiaoguang2, Huang Tao2(1 Department of Building Engineering, Tongji University, Shanghai 200092, China;2 Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China)Abstract: The high-rise building is composed of two 99m high towers which are linked by a 15.6m span connection. RC frame-core wall structure is adopted for the structure. Depending on structural features and importance of occupancy, seismic performance objectives were reasonably selected corresponding to the seismic levels. The nonlinear time-history analysis is carried out under the rare earthquake of 7 degree using PERFORM-3D, which offers a nonlinear fiber model to simulate the nonlinear behavior of RC walls. The deformation performance and development of story shear force and story moment are given in this paper. The performance of main components is also evaluated. The results indicate that the maximum story drift ratio is less than 1/100 under rare earthquakes; the order and distribution of damage in the components are reasonable, which can dissipate some dynamic energy; the nonlinear development of the components can fulfill the performance target under rare earthquake.Keywords: nonlinear time-history analysis; fiber model; connected high-rise structure
