第一作者梁岩男，博士生，讲师，1986年3月生

锈蚀钢筋混凝土构件基于地震损伤的恢复力模型研究

梁岩1,2,罗小勇2, 陈代海1

(1.郑州大学土木工程学院，郑州450001； 2.中南大学土木工程学院，长沙410075)

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。

关键词：钢筋混凝土；锈蚀；恢复力模型；抗震

基金项目：国家自然科学

收稿日期：2013-09-12修改稿收到日期：2014-02-25

中图分类号:P315.95; TU37文献标志码：A

Restoring force model of corroded reinforced concrete members undergoing seismic damage

LIANGYan1,2,LUOXiao-yong2,CHENDai-hai1(1.College of Civil Engineering, Zhengzhou University, Zhengzhou 450001,China;2.College of Civil Engineering, Central South University, Changsha 410075,Chin)

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.

Key words:steel reinforced concrete; corroded; restoring force model; aseismic

结构在设计使用年限内由于环境、荷载等因素影响，必然会出现一定程度损伤，其中最常见的是钢筋锈蚀、混凝土碳化、冻融循环等，这些因素导致结构抗震性能降低。一般而言，对于钢筋混凝土结构，若处于地震区域，当结构耐久性损伤后首先面临的问题可能是结构抗震能力不足。……