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根据6根配置HRBF500级细晶钢筋的混凝土柱的低周反复加载试验,计算不同轴压比、剪跨比和配箍率构件的屈服位移和滞回耗能。根据经典Park模型存在的若干问题,引入比例参数协调低周反复加载极限位移与单调加载极限位移的关系,并局部修正Park模型。最后,对6个构件进行了加载全过程的损伤分析,总结损伤趋势和规律,分析轴压比、剪跨比和配箍率对损伤发展趋势的影响,并给出相应损伤评价准则和设计建议。
The yield displacement and hysteresis energy loss of concrete columns with different axial compression ratio, shear span ratio and stirrup ratio were calculated based on the low-cycle cyclic loading test of six concrete columns with HRBF500 grade fine-grained steel bars. According to the problems existing in the classical Park model, the proportional parameter is introduced to coordinate the relationship between the limit displacement and the limit load under monotonic loading. The Park model is modified locally. Finally, the damage analysis of the six components was carried out, the damage tendency and law were summarized, and the influence of axial compression ratio, shear span ratio and stirrup ratio on the damage development trend was analyzed. And the corresponding damage evaluation criteria and design suggestions .