超高層結構彈塑性模擬中若干問題的討論
甄圣威，汪 洋
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（奧雅納工程顧問深圳公司，深圳 518048）[摘要] 彈塑性動力時程分析方法是確定結構大震安全性的重要方法，也是性能化抗震設計的必要工具和必然趨勢。本文基于超高層建筑結構彈塑性分析中累積的經(jīng)驗，對模擬和分析結果判斷所遇到的問題提出一些見解，并結合某超高層結構案例的分析結果作為輔助論證。文中提出對連梁、巨柱等構件的模擬應抓住構件的受力和在結構中的作用等特征來簡化計算模型，認為在軟件還不能準確反映構件或材料細觀破壞行為情況下不建議采用精細化的模型。由于結構進入塑形后周期會變長，故本文認為對彈塑性分析的基底剪力、層間位移角等應結合結構動力特性的變化及時程波的動力特性進行綜合評判?；谖覈?guī)范的性能目標評判標準還有待完善。[關鍵詞] 彈塑性時程分析;連梁;巨型柱;基底剪力中圖分類號：TU973,TU318 文獻標識碼：A 文章編號：1002-848X(2013)S1-0546-06Discussion on nonlinear time history analysis for super high-rise buildingZhen Shengwei，Wang Yang(Ove Arup & Partners Ltd Shenzhen Branch, Shenzhen 518048,Abstract: Non-linear time history analysis is considered to be an important method to verify the structural performance under rare earthquake as well as the essential tool for performance based seismic design. Based on the experience of non-linear time history analysis of high-rise building, this paper proposes some suggestions on the simulation and results assessment then verify them with the project examples. It is argued that the simulation of coupling beam, mega column should comply with the characteristic and the mechanism of structural element and simplified the model correspondingly. It is suggested that if the program is not able to simulate the element or the material micro-failure process exactly yet, the fine- tuned model is not needed. Because the structure will become flexible after entering plastic stage, the verification of the index including base shear, storey drift ratio and so on should take account the change of dynamic property of the structural and the input earthquake wave. The performance criteria which suits Chinese code is still need to be developed.Keywords: nonlinear time history analysis; coupling beam; mega-column; base shear作者介紹：甄圣威，碩士，Email: sheng-wei.zhen@arup.com。
