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基于典型的砌体材料屈服函数模型,对混凝土塑性损伤模型屈服函数进行修正,将之用于砌体结构或构件的性能模拟。建议双轴抗压强度与单轴抗压强度比值取为2.0,修正后的屈服曲线与典型的砌体材料屈服曲线及试验结果拟合较好。对某外砖墙-钢筋混凝土框架推覆试验进行了非线性计算,分析了整体结构和墙体的承载力性能,阐明了墙体在整体结构破坏过程中的耗能情况,正确反映了结构整体性能和墙体的主要破坏模式,验证了修正屈服面的塑性损伤模型在模拟砌体结构中的应用。
Based on the typical yield function model of masonry material, the yield function of concrete plastic damage model is modified and used to simulate the performance of masonry structure or component. It is suggested that the ratio of biaxial compressive strength to uniaxial compressive strength be taken as 2.0, and the modified yield curve should fit well with the yield curve and test results of typical masonry materials. The non-linear calculation of the push-out test of a brick-wall-reinforced concrete frame is carried out, the bearing capacity of the whole structure and the wall is analyzed, the energy consumption of the wall in the whole structure destruction is expounded, and the whole structure Performance and the main failure mode of the wall, verified the application of the modified plastic damage model of yield surface in the simulation of masonry structure.