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以一栋高层办公建筑结构为例,分别采用型钢混凝土框架-核心筒结构方案与钢筋混凝土框架-核心筒结构方案,进行罕遇地震作用下非线性响应对比研究。采用通用有限元分析软件平台ABAQUS建立分析模型,基于用户自定义材料接口引入混凝土损伤本构关系反映混凝土的开裂、压碎等非线性行为。在此基础上,对两种结构方案分别进行罕遇地震作用下的结构非线性时程分析。结果表明:采用型钢混凝土梁、柱构件并非总能达到改善结构整体罕遇地震作用下非线性性能的目的,在El Centro地震波作用下,采用型钢混凝土框架-核心筒结构方案较采用钢筋混凝土框架-核心筒结构方案的位移响应明显减小,而Chi Chi地震波作用下两方案位移响应差别不大,Taft地震波作用下结构采用型钢混凝土框架-核心筒方案时位移响应反而变大。
Taking a high-rise office building structure as an example, the non-linear response comparison study under rare earthquakes was carried out by adopting the SRC-CFST scheme and the RC frame-core structure respectively. The analytical model was established by the general finite element analysis software platform ABAQUS. Based on the user-defined material interface, the damage damage constitutive relation was introduced to reflect the nonlinear behavior such as cracking and crushing of concrete. On this basis, the structure nonlinear time-history analysis of the two kinds of structural schemes under rare earthquakes respectively is carried out. The results show that the use of SRC beams and column members can not always achieve the purpose of improving the nonlinear performance under the rare earthquakes in the whole structure. Under the action of El Centro seismic wave, the SRC frame - Displacement response of the core tube structure scheme is obviously reduced. However, the displacement response of the two schemes is not obvious under the Chi Chi seismic wave. The displacement response of the structure using the steel reinforced concrete frame-core tube structure under Taft seismic wave becomes larger.