碳化混凝土框架结构抗震性能数值仿真

为研究碳化后混凝土结构的抗震性能,根据已有研究总结得到的碳化混凝土本构关系,运用计算机仿真技术和面向对象的编程方式,编制Windows操作系统下具有图形界面的计算程序.针对剪切型框架,提出以层模型为计算模型的地震反应计算方法并编程实现,同时以具体算例初步探讨碳化对剪切型框架抗震性能的影响.数值分析表明:对于小震,在受到对刚度较大结构不利的地震波作用下,碳化对混凝土结构地震反应不利;对于大震,碳化对结构反应时程曲线的影响较小,但碳化可能引起结构极限变形能力降低,产生不利影响.

Numerical simulation on seismic behavior of carbonated concrete frame structure

Carbonation increases the strength of concrete and decreases the ductility of concrete. Influence of carbonation on the seismic behavior of concrete structures should be taken into account. Based on the constitutive relation of carbonated concrete proposed by previous studies, several Windows-based calculation programs with graphic interface are developed using object-oriented programming method. Earthquake response calculation for shear frames using floor model is proposed and implemented by programming. The carbonation influences on seismic behavior of shear frames are discussed with a case. According to the numerical analysis, carbonation is a disadvantageous factor to concrete structure under small earthquake which has negative effects on the large rigidity structure, and has few influences on seismic behavior of concrete structure under large earthquake, while the ultimate deformation of concrete structure may be decreased.