（1 中国十七冶集团有限公司技术中心，马鞍山 243000；2 安徽工业大学建筑工程学院，马鞍山 243032）

[摘要]  以型钢高强混凝土（SRHSC）梁为研究对象，结合前期关于SRHSC梁受力机理及承载能力的试验研究成果，认为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”计算分析了截面高度、混凝土强度等级、配钢率及型钢翼缘宽度比（型钢翼缘宽度和梁截面宽度的比值）等参数的损伤敏感度，揭示了主要设计参数对SRHSC梁损伤演化规律的影响规律。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。

[关键词]  型钢高强混凝土梁；设计参数；损伤敏感度；极限承载能力；损伤演化

中图分类号：TU398⁺.2           文献标识码：A           文章编号：

Damage sensitivity analysis for main design parameters of SRHSC beams

Jin Rencai¹, Tao Qinglin²

(1 Technology Center, China MCC17 group Co., Ltd., Maanshan 243000, China;

2 School of Civil & Architecture Engineering, Anhui University of Technology, Maanshan 243032, China)

Abstract: Taking thesteel reinforced high strength concrete (SRHSC) beam as research object, and based on previous studies on experiment achievements about mechanical behavior and carrying capacity of SRHSC beam, carrying capacity is considered as key measure for evaluating SRHSC beam mechanical property under limit state, then the mean value of flexural capacity of normal section 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, damage sensitivity of sectional height, concrete strength, steel ratio and flange width ratio (the ratio of steel flange width and beam width) are revealed, then the influence law of main design parameters on damage evolution of SRHSC beam is obtained. The achievements will provide theoretical support for establishing story damage model of SRHSC frame structure.

Keywords: steel reinforced high strength concrete (SRHSC) beam; design parameter; damage sensitivity analysis; ultimate carrying capacity; damage evolution

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