中文摘要：

以型钢高强混凝土（SRHSC）梁为研究对象，结合 SRHSC 梁受力机理及承载能力的试验研究成果，提出了极限状态下的承载能力是评价梁力学性能的关键指标，将损伤前后梁正截面抗弯承载力之比和斜截面抗剪承载力之比的均值作为自变量，给出了 SRHSC 梁损伤表征函数，并借助“预定损伤法”，揭示了主要设计参数对 SRHSC 梁损伤演化的影响规律。研究成果将为建立地震激励下 SRHSC 框架结构楼层损伤模型提供理论和数据支持。

英文摘要：

Taking the SRHSC beam as research object and based on previous studies on experiment achievements about me-chanical behavior and carrying capacity of SRHSC beam ,it is put forward that the carrying capacity is considered as key mea-sure for evaluating SRHSC beam mechanical property under limit state ,then the mean value of flexural capacity of normal sec-tion and shear capacity of inclined section ratio before and after damage is used as variables and the damage characterization function of SRHSC beam is established finally .With the application of predetermined damage method ,the influence laws of main design parameters on damage evolution of SRHSC beam are obtained .The achievements will provide theoretical support for establishing story damage model of SRHSC frame structure .