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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。
The building height of Dalian Greenland Center is 518m, which is a super-B-level building. The structure plane adopts an equilateral triangle with arc-shaped cutting corners, and is a mega-frame + core tube + boom structure system. Six giant SRC columns are located in the structure The six corners of the plane. The dynamic elasto-plastic analysis is carried out by using ABAQUS software to study the nonlinear dynamic response of the structure when the ground motion is input along the horizontal axis and the first-order mode’s translational motion under the condition of rare earthquakes and the quantitative Evaluation, including structural deformation characteristics, floor shear, overturning moment and plastic wall shear damage. The results show that the elasto-plastic analysis of ground motion along multi-angles compared with ordinary rectangular plane can effectively reflect the weak parts of structures and provide favorable reference for improving the seismic performance of structures.