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为了研究地震作用下型钢高强高性能混凝土构件的损伤,总结和分析了已有地震损伤模型存在的不足,基于低周反复荷载作用下型钢高强高性能混凝土框架柱的损伤试验研究结果,对框架柱的地震损伤特性进行了分析。通过合理地考虑循环次数对构件极限抵御能力(极限耗能和变形能力)的影响以及加载路径对损伤的影响,建立了能够全面反映水平地震作用下构件力学特性变化的基于变形和能量组合的非线性双参数损伤模型。对损伤模型中相应的参数进行了讨论和分析,并给出了其具体定义和表达式。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,该模型能够较好地描述型钢高强高性能混凝土框架柱的地震损伤演化过程与程度,且理论上更为合理。研究结果为该类结构构件的地震损伤评估以及基于损伤的抗震设计方法的建立提供了理论依据。
In order to study the damage of high strength and high performance concrete members under the action of earthquake, the existing shortcomings of the earthquake damage model are summarized and analyzed. Based on the results of the damage test of the high strength and high performance concrete frame columns under low cyclic loading, Earthquake damage characteristics were analyzed. By reasonably considering the effect of cyclic number on the member’s ultimate resilience (ultimate energy dissipation and deformation capacity) and the influence of loading path on the damage, a deformation and energy combination based non-modal response model Linear dual parameter damage model. The corresponding parameters in the damage model are discussed and analyzed, and the specific definitions and expressions are given. Combined with the test results, the effectiveness of the damage model was verified. The results show that the model can describe the evolution process and degree of seismic damage of steel-framed high-strength high-performance concrete columns better and theoretically more reasonable. The results provide a theoretical basis for the seismic damage assessment of such structural members and the establishment of earthquake-resistant design method based on damage.