天津現(xiàn)代城A區(qū)塔樓結(jié)構(gòu)彈塑性分析
王楊，陳波華，趙華，張福
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（天津市建筑設(shè)計(jì)院， 天津 300074）
［摘要］天津現(xiàn)代城A區(qū)塔樓為大高寬比超高層結(jié)構(gòu)，采用鋼筋混凝土框架支撐核心筒結(jié)構(gòu)體系，解決了結(jié)構(gòu)短向剛度弱、兩向剛度相差大的問(wèn)題，結(jié)構(gòu)支撐體系采用了普通鋼支撐與屈曲約束支撐混合布置的形式，實(shí)現(xiàn)地震作用下支撐先于核心筒墻體進(jìn)入屈服狀態(tài)，支撐體系既保證結(jié)構(gòu)的剛度，又發(fā)揮屈曲約束支撐耗能能力的設(shè)計(jì)思想。針對(duì)結(jié)構(gòu)特點(diǎn)，采用EPDA軟件、SAUSAGE軟件和ABAQUS軟件進(jìn)行了中震及大震作用下的彈塑性時(shí)程分析，得到了支撐受力及結(jié)構(gòu)的損傷狀態(tài)。分析表明，中震作用下結(jié)構(gòu)主要抗側(cè)力構(gòu)件基本處于彈性工作狀態(tài)；大震作用下結(jié)構(gòu)底層核心筒、底層框支柱、與支撐相連框架柱等關(guān)鍵構(gòu)件出現(xiàn)輕微至中等程度損傷；結(jié)構(gòu)變形滿足規(guī)范相關(guān)要求，結(jié)構(gòu)體系合理可行。［關(guān)鍵詞］超高層結(jié)構(gòu); 大高寬比; 鋼筋混凝土框架-支撐-核心筒結(jié)構(gòu); 彈塑性分析; 屈曲約束支撐中圖分類(lèi)號(hào)：TU398 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：1002-848X(2015)23-0040-06
Elasto-plastic analysis of the tower structure in A district of Tianjin Modern CityWang Yang, Chen Bohua, Zhao Hua, Zhang Fu(Tianjin Architecture Design Institute, Tianjin 300074, China)Abstract: The tower in A district of Tianjin Modern City is a super high-rise structure with large aspect ratio. RC frame-brace-corewall structural system is adopted to solve the problem of large structural stiffness difference in two directions considering weak stiffness in shorter length direction. Both common steel braces and buckling restrained braces are adopted in the structural bracing system in form of hybrid arrangement. The design idea was realized that the braces were yield status in advance of core walls and the bracing system can ensure the structural stiffness as well as exerting energy dissipation capacity of buckling restrained braces under earthquake. Considering the structural characteristics, the EPDA software, SAUSAGE software and ABAQUS software were used to carry out elasto-plastic time-history analyses under both fortification earthquake and rare earthquake to obtain the mechanical states of braces and damage states. Analyses show that the main lateral force resisting members basically stay elastic under fortification earthquake. However, under rare earthquake, slight to moderate damages occur in critical members such as the bottom layers of core walls, bottom layers of frame-supporting columns and frame columns connected to braces. Structural deformation meets relevant specification requirements and structural system is reasonable and feasible.Keywords: super high-rise structure; large aspect ratio; RC frame-brace-corewall structure; elasto-plastic analysis; buckling restrained brace
作者簡(jiǎn)介：王楊，碩士，高級(jí)工程師，Email：vipwangcn@qq.com。
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