某三角形平面超限高層建筑結構動力彈塑性分析*
任重翠1，劉軍進1，徐自國1，郝瑋1，龔進2
- 摘 要
-
（1 中國建筑科學研究院， 北京 100013； 2 綠地集團西北事業(yè)部， 西安 710065）
［摘要］大連綠地中心建筑高度518m，為超B級高度建筑，其結構平面采用帶弧形切角的等邊三角形，為巨型框架+核心筒+伸臂桁架結構體系，6根巨型鋼骨混凝土柱位于結構平面的六個角部。采用ABAQUS軟件對其進行動力彈塑性分析，研究在預估罕遇地震作用下，分別沿水平軸和第一階振型平動方向輸入地震動時，結構的非線性動力響應，并給出定量評價，包括結構變形特征、樓層剪力、傾覆力矩和剪力墻塑性損傷等。結果表明，與普通矩形平面相比，沿多角度輸入地震動進行彈塑性分析，能夠有效反映結構的薄弱部位，并為改善結構抗震性能提供有利的參考意見。［關鍵詞］三角形平面; 超限高層建筑; 動力彈塑性分析; 多角度輸入; 抗震性能中圖分類號：TU973，TU318+.2 文獻標識碼：A 文章編號：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
*國家自然科學基金重大研究計劃集成項目(91315301)。作者簡介：任重翠，碩士，一級注冊結構工程師，Email:renchongcui@cabrtech.com。
