基于OpenSees的RC框架-核心筒超高层建筑抗震弹塑性分析

近年来我国高层建筑结构抗震弹塑性分析得到广泛应用。但现有的分析多基于商用软件,限制了相关研究的深入发展。该文在通用开源有限元程序OpenSees的基础上,通过开发合理的剪力墙构件模型和混凝土本构模型,实现了RC框架-核心筒超高层结构的抗震弹塑性分析,并以一系列剪力墙和一栋141.8m高框架-核心筒超高层为例,通过与试验结果和通用有限元程序MSC.Marc计算结果的对比,验证了该文提出的单元和计算方法 的合理性和可靠性,可为进一步开展基于开源有限元程序OpenSees的超高层建筑结构地震灾变行为研究提供参考。

ELASTO-PLASTIC ANALYSIS FOR SUPER TALL RC FRAME-CORE TUBE STRUCTURES BASED ON OPENSEES

Elasto-plastic analysis has been widely applied in the design of tall buildings. However, most analyses are conducted by using commercial software, which limits the further in-depth research on relevant topics. In this work, a new shear wall model and a concrete constitutive model are developed based on the open source finite element code, OpenSees, by which the elasto-plastic seismic analyses of super tall RC frame-core tube structures can be performed. A series of shear walls and a 141.8m frame-core tube building are simulated. By comparison with the experimental results and the analytical results by using MSC.Marc, the rationality and reliability of the proposed element and analysis method are validated, which will provide an effective tool for further research of the seismic behavior of tall buildings based on OpenSees.