昆明螺蛳湾中心超限高层建筑抗震性能化设计研究

发布时间：2018-05-02 17:52

本文选题：超限高层建筑 + 加强层　；参考：《土木工程学报》2014年S2期

【摘要】：昆明螺蛳湾中心由2#、3#、5#三幢超高层塔楼及商业裙房组成。其中3#塔楼地上49层,结构高度216.6m,采用钢管混凝土框架-钢骨混凝土核心筒结构体系,设置2道加强层,除结构高度超限外,还存在尺寸突变、构件间断、楼层受剪承载力突变、塔楼偏置等多项不规则类型。采用基于性能的抗震设计方法,提出适合该工程实际情况的抗震性能目标和不同构件的抗震性能设计指标,进行基于等效线性化方法的中震和大震下结构关键构件的性能指标验算和复核。采用等效迭代方法计算时,由于考虑部分水平构件的屈服影响,结构整体刚度降低,各楼层总地震剪力和核心筒分担的地震剪力随之减小,但外围框架分担的地震剪力却呈增大趋势。同时还应用混凝土材料非线性本构在ABAQUS中的二次开发,进行罕遇地震下的动力弹塑性时程分析。结果表明,核心筒墙肢仅少量发生受压损伤,局部钢管进入塑性状态,连梁受压损伤明显,钢梁普遍进入塑性且塑性应变程度相对较大,起到了较好的耗能作用,结构整体抗震性能良好,关键构件的抗震性能指标满足预设的性能要求。
[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.
【作者单位】：浙江省建筑设计研究院;浙江大学;浙江中设工程设计有限公司;
【分类号】：TU973.31

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