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利用刚度等效原则将钢筋弥散于整个混凝土中,将钢筋混凝土视为连续均质的材料,借助ABAQUS软件自带的混凝土损伤本构模型,对应用于高层建筑工程中的高强钢筋混凝土材料的本构关系进行分段线性简化,实现了采用等效材料本构模型模拟钢筋混凝土。采用等效材料本构模型对既有文献中已进行试验的钢筋混凝土剪力墙进行数值模拟,所获得的荷载-位移曲线与试验得到的曲线一致性较好,说明了等效材料本构模型的有效性。最后基于该本构模型,利用ABAQUS软件对一个超高层钢筋混凝土框架-核心筒结构进行了罕遇地震作用下的弹塑性时程分析,模拟结果能较为合理地反映高层建筑在地震作用下的力学响应,说明可以利用该本构模型指导工程实践。
Based on the principle of equivalent stiffness, the reinforcement is dispersed in the whole concrete. The reinforced concrete is regarded as a continuous homogeneous material. With the concrete damage constitutive model provided by ABAQUS software, the high strength reinforced concrete material used in high-rise building The structure of the reinforced concrete is modeled by using the equivalent material constitutive model. The equivalent material constitutive model is used to simulate the existing reinforced concrete shear walls in the existing literature. The obtained load-displacement curve is in good agreement with the experimental one, which shows that the equivalent material constitutive model Effectiveness. Finally, based on the constitutive model, elasto-plastic time-history analysis of a super high-rise RC frame-core structure subjected to rare earthquakes was performed by using ABAQUS software. The simulation results can reasonably reflect the mechanical behavior of high-rise buildings under earthquake Response, indicating that the constitutive model can be used to guide engineering practice.