超高層結(jié)構(gòu)彈塑性模擬中若干問題的討論
甄圣威，汪 洋
- 摘 要
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（奧雅納工程顧問深圳公司，深圳 518048）[摘要] 彈塑性動(dòng)力時(shí)程分析方法是確定結(jié)構(gòu)大震安全性的重要方法，也是性能化抗震設(shè)計(jì)的必要工具和必然趨勢(shì)。本文基于超高層建筑結(jié)構(gòu)彈塑性分析中累積的經(jīng)驗(yàn)，對(duì)模擬和分析結(jié)果判斷所遇到的問題提出一些見解，并結(jié)合某超高層結(jié)構(gòu)案例的分析結(jié)果作為輔助論證。文中提出對(duì)連梁、巨柱等構(gòu)件的模擬應(yīng)抓住構(gòu)件的受力和在結(jié)構(gòu)中的作用等特征來簡(jiǎn)化計(jì)算模型，認(rèn)為在軟件還不能準(zhǔn)確反映構(gòu)件或材料細(xì)觀破壞行為情況下不建議采用精細(xì)化的模型。由于結(jié)構(gòu)進(jìn)入塑形后周期會(huì)變長(zhǎng)，故本文認(rèn)為對(duì)彈塑性分析的基底剪力、層間位移角等應(yīng)結(jié)合結(jié)構(gòu)動(dòng)力特性的變化及時(shí)程波的動(dòng)力特性進(jìn)行綜合評(píng)判?；谖覈?guó)規(guī)范的性能目標(biāo)評(píng)判標(biāo)準(zhǔn)還有待完善。[關(guān)鍵詞] 彈塑性時(shí)程分析;連梁;巨型柱;基底剪力中圖分類號(hào)：TU973,TU318 文獻(xiàn)標(biāo)識(shí)碼：A 文章編號(hào)：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。
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