本文選題：超限高層建筑 + 加強(qiáng)層��； 參考：《土木工程學(xué)報(bào)》2014年S2期

【摘要】：昆明螺螄灣中心由2#、3#、5#三幢超高層塔樓及商業(yè)裙房組成。其中3#塔樓地上49層,結(jié)構(gòu)高度216.6m,采用鋼管混凝土框架-鋼骨混凝土核心筒結(jié)構(gòu)體系,設(shè)置2道加強(qiáng)層,除結(jié)構(gòu)高度超限外,還存在尺寸突變、構(gòu)件間斷、樓層受剪承載力突變、塔樓偏置等多項(xiàng)不規(guī)則類型。采用基于性能的抗震設(shè)計(jì)方法,提出適合該工程實(shí)際情況的抗震性能目標(biāo)和不同構(gòu)件的抗震性能設(shè)計(jì)指標(biāo),進(jìn)行基于等效線性化方法的中震和大震下結(jié)構(gòu)關(guān)鍵構(gòu)件的性能指標(biāo)驗(yàn)算和復(fù)核。采用等效迭代方法計(jì)算時(shí),由于考慮部分水平構(gòu)件的屈服影響,結(jié)構(gòu)整體剛度降低,各樓層總地震剪力和核心筒分擔(dān)的地震剪力隨之減小,但外圍框架分擔(dān)的地震剪力卻呈增大趨勢。同時(shí)還應(yīng)用混凝土材料非線性本構(gòu)在ABAQUS中的二次開發(fā),進(jìn)行罕遇地震下的動(dòng)力彈塑性時(shí)程分析。結(jié)果表明,核心筒墻肢僅少量發(fā)生受壓損傷,局部鋼管進(jìn)入塑性狀態(tài),連梁受壓損傷明顯,鋼梁普遍進(jìn)入塑性且塑性應(yīng)變程度相對較大,起到了較好的耗能作用,結(jié)構(gòu)整體抗震性能良好,關(guān)鍵構(gòu)件的抗震性能指標(biāo)滿足預(yù)設(shè)的性能要求。
[Abstract]:Kunming Luodong Bay Center consists of 3 super tall towers and 3 commercial aprons. Among them, there are 49 floors on the floor and 216.6 m in height. The steel tube concrete frame-steel reinforced concrete core tube structure system is used to set up two strengthened floors. Besides the height of the structure, there is a sudden change in size and discontinuity of the members. Floor shear capacity sudden change, tower deflection and other irregular types. Based on the performance-based seismic design method, the aseismic performance objectives suitable for the actual situation of the project and the seismic performance design indexes of different components are proposed. Based on the equivalent linearization method, the performance indexes of key structural components under moderate and strong earthquakes are checked and checked. When the equivalent iteration method is adopted, the overall stiffness of the structure is reduced because of considering the yield effect of some horizontal members, and the total seismic shear force of each floor and the seismic shear force shared by the core tube decrease accordingly. However, the seismic shear force shared by the peripheral frame is increasing. At the same time, the dynamic elastoplastic time history analysis under rare earthquake is carried out by using the nonlinear constitutive model of concrete material developed in ABAQUS. The results show that only a small amount of compression damage occurs in the core tube wall limb, and the local steel pipe enters the plastic state, and the compression damage of the connecting beam is obvious, and the steel beam generally enters into the plasticity and the plastic strain degree is relatively large, which plays a better role in energy dissipation. The overall seismic performance of the structure is good, and the seismic performance index of the key components can meet the preset performance requirements.
【作者單位】： 浙江省建筑設(shè)計(jì)研究院;浙江大學(xué);浙江中設(shè)工程設(shè)計(jì)有限公司;
【分類號】：TU973.31

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本文編號：1834898