装配整体式框架结构多尺度分析和力学性能研究

Research on multi-scale analysis and mechanical properties of precast concrete frame structure

以某装配整体式钢筋混凝土框架结构为例,结合有限元程序ABAQUS,建立该结构的多尺度有限元模型,利用MPC多点约束方式实现多尺度界面连接,同时建立精细化实体单元模型和宏观梁单元模型作为对比参照。以结构试验为基础,从结构振动模态分析、静力弹塑性分析、动力学时程分析三个方面考察了这三种模型的计算精度、效率及该装配式结构的力学性能,结果表明:这三种模型计算得到的结构承载力、滞回曲线、骨架曲线与试验结果符合较好,其中多尺度模型在准确、高效完成整体结构计算的同时对关键局部构件进行了精细化计算,在耗费计算机资源和计算时间方面占有综合优势,为装配式结构的工程设计和结构分析提供理论依据。

In this paper,a fabricated monolithic reinforced concrete frame structure is taken as an example,the multi-scale interface of the structure is connected by MPC multi-point constraint method of ABAQUS finite element software,and the multi-scale model is established.At the same time,the refined solid element model and macro beam element model are established as a comparative reference.Based on the test,the calculation accuracy,efficiency and mechanical properties of the fabricated structure are investigated through the three aspects of structural vibration modal analysis,static elastic-plastic analysis and dynamic time history analysis.The results show that the load-carrying capacity,hysteretic curve and skeleton curve calculated by the three models are in good agreement with the test results,and the multi-scale model is in good agreement with the test results.The calculation is completed accurately and efficiently,and the refined calculation of the key local components is carried out,which has a comprehensive advantage in the consumption of computer resources and calculation time,and provides a theoretical basis for the engineering design and structural analysis of the fabricated structure.