【摘要】 为建立锈蚀钢筋混凝土构件恢复力模型,通过对6个锈蚀钢筋混凝土受弯构件低周反复荷载试验,得到不同锈蚀程度的各试件的滞回曲线及骨架曲线,分析了钢筋锈蚀对试件抗震性能的影响。根据试验成果,结合钢筋锈蚀引起结构破坏形态的改变,综合考虑钢筋锈蚀后引起结构截面几何损伤、钢筋和混凝土力学性能降低、粘结滑移性能劣化以及结构刚度退化等各种耐久性损伤因素,并考虑箍筋锈蚀引起结构延性的影响,提出了锈蚀钢筋混凝土构件基于地震损伤的恢复力模型的确定方法。通过与试验进行对比分析表明模型描绘的骨架曲线和滞回曲线与试验结果总体吻合较好,所描述的现象与试验一致,该恢复力模型可在损伤钢筋混凝土结构地震反应分析中采用。更多还原

【Abstract】 To study the restoring force model of corroded reinforced concrete members undergoing seismic damage,the tests of cyclic loading on six corroded flexural members were carried out. The hysteresis loops and skeleton curves of corroded reinforced concrete specimens with various levels of corrosion were obtained and the effects of reinforcement corrosion on aseismic property of specimens were analyzed. Based on test results,in accordance with morphological changes of the structures due to steel corrosion,comprehensively considering various kinds of durable damages of the structures,such as,geometrical damage of concrete cross-section,mechanical performance degradation of concrete and reinforcement,bond-slip performance degradation,stiffness degradation and so on,as well as the amendment caused by stirrup corrosion,the method to establish the restoring force model of corroded reinforced concrete members under flexural and compressive stress conditions was proposed. Comparing with experimental data,the calculated skeleton curves and hysteretic curves with the model agreed well with the test results and the phenomena described with the model conformed well with the test results. The model could be used in the seismic response analysis of damaged reinforced concrete structures.更多还原