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基于12榀酸性大气环境下锈蚀钢框架柱低周反复加载试验结果,进一步分析其损伤演变特性。充分考虑加载制度、加载路径、循环次数对锈蚀钢框架柱抗震性能的影响,提出了适用于酸性大气环境下锈蚀钢框架柱的双参数地震损伤模型,该模型可以体现出锈蚀钢框架柱的塑性变形损伤及累积损伤。利用部分试验结果,拟合得到损伤模型中的试验常数与轴压比、失重率之间的关系式。结合试验结果,对损伤模型的有效性进行了验证。研究结果表明:该模型可以较为合理地描述酸性大气环境下锈蚀钢框架柱地震损伤的产生及其演化过程。
Based on the test results of low-cycle repeated loading of corroded steel frame columns under 12 榀 acidic atmosphere, the damage evolution characteristics were further analyzed. Considering the influence of loading system, loading path and number of cycles on the seismic performance of corroded steel frame columns, a two-parameter seismic damage model suitable for corroded steel frame columns in acidic atmosphere is proposed. The model can reflect the plasticity of corroded steel frame columns Deformation damage and cumulative damage. Using the partial test results, the relationship between the experimental constants and the axial compression ratio and the weight loss rate in the damage model is fitted. Combined with the test results, the effectiveness of the damage model was verified. The results show that this model can reasonably describe the occurrence and evolution of earthquake damage of corroded steel frame columns under acidic atmosphere.