某三角形平面超限高层建筑结构动力弹塑性分析*
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（1 中国建筑科学研究院， 北京 100013； 2 绿地集团西北事业部， 西安 710065）
［摘要］大连绿地中心建筑高度518m，为超B级高度建筑，其结构平面采用带弧形切角的等边三角形，为巨型框架+核心筒+伸臂桁架结构体系，6根巨型钢骨混凝土柱位于结构平面的六个角部。采用ABAQUS软件对其进行动力弹塑性分析，研究在预估罕遇地震作用下，分别沿水平轴和第一阶振型平动方向输入地震动时，结构的非线性动力响应，并给出定量评价，包括结构变形特征、楼层剪力、倾覆力矩和剪力墙塑性损伤等。结果表明，与普通矩形平面相比，沿多角度输入地震动进行弹塑性分析，能够有效反映结构的薄弱部位，并为改善结构抗震性能提供有利的参考意见。［关键词］三角形平面; 超限高层建筑; 动力弹塑性分析; 多角度输入; 抗震性能中图分类号：TU973，TU318+.2 文献标识码：A 文章编号：1002-848X(2015)23-0028-06
Dynamic elasto-plastic analysis of an out-of-code high-rise building structure with triangular planeRen Chongcui1, Liu Junjin1, Xu Ziguo1, Hao Wei1, Gong Jin2(1 China Academy of Building Research, Beijing 100013, China; 2 Greenland Group Northwest Department, Xi′an 710065, China)Abstract: The Dalian Greenland Center building with architecture height of 518m is beyond the B-level height limit of the code. The plane adopts an equilateral triangle with chamfered curves. The mega frame-core wall structural system with outriggers is adopted with six mega steel reinforced concrete columns located at the six corners of the structural plane. Dynamic elasto-plastic analysis was carried out by software ABAQUS to analyze the nonlinear dynamic responses of the structure with earthquake wave inputs along the horizontal axis and the first mode direction respectively under the rare earthquake of seismic precautionary intensity. The quantitative evaluations were given including the structural deformation characteristics, storey shear forces, overturning moments and shear wall plastic damages. The results show that compared with the ordinary rectangle plane, dynamic elasto-plastic analysis with multi-angle inputs of earthquake waves can reflect the weak parts of the structural storey and provide reference ideas for improving the structural seismic performance.Keywords: triangular plane; out-of-code high-rise building; dynamic elasto-plastic analysis; multi-angle input; seismic performance
*国家自然科学基金重大研究计划集成项目(91315301)。作者简介：任重翠，硕士，一级注册结构工程师，Email:renchongcui@cabrtech.com。
