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栓钉锈蚀的钢-混凝土组合梁疲劳性能研究

Fatigue behavior of steel-concrete composite beams with corroded stud
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摘要 为研究栓钉锈蚀后负弯矩区钢-混凝土组合梁的疲劳性能,分别进行1个试件的静力试验和5个试件的疲劳试验研究。通过静力试验获得组合梁的极限荷载,为疲劳试验提供依据。通过疲劳试验测试分析了不同栓钉锈蚀率组合梁在经历不同的疲劳循环加载次数后的材料应变、跨中挠度、残余变形及刚度等。试验结果表明,栓钉锈蚀率的增加使组合梁疲劳寿命下降,使负弯矩区组合梁在经历相同疲劳加载次数后的残余变形增加。组合梁刚度在疲劳加载过程中有一定程度的退化,弯曲刚度的退化与栓钉的锈蚀率无明显关系,滑移刚度的退化会随着栓钉锈蚀率的增加而加剧。 In order to study the fatigue behavior of steel-concrete composite beams with corroded stubs under negative bending moment,one specimen was tested under static loading while five specimens were tested under fatigue loading.In the static test,the bearing capacity of the composite beam under negative bending moment was obtained as a reference for the fatigue tests. In the fatigue tests,the load-strain curves,load-mid span deflection curves,the residual deformation and stiffness were obtained. The test results indicate that the fatigue life of test specimens decreases with the increases of corrosion rate of studs while the residual deformation increases with the increases of corrosion rate of studs. The stiffness of test specimens decreases during the fatigue loading process but has no relationship with the corrosion rates. The slip stiffness decreases significantly with the increases of corrosion rate of the studs.
作者 张海鹏 陈驹 金伟良 毛江鸿 ZHANG Haipeng;CHEN Ju;JIN Weiliang;MAO Jianghong(College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058 , China;Ningbo Institule of Technology, Zhejiang University, Ningbo 315100, China)
出处 《建筑结构学报》 EI CAS CSCD 北大核心 2019年第5期89-95,共7页 Journal of Building Structures
基金 “十三五”国家重点研发计划(2017YFC0703409).
关键词 钢-混凝土组合梁 负弯矩区 栓钉锈蚀 静力试验 疲劳试验 疲劳性能 steel-concrete composite beam negative bending moment area stud corrosion static test fatigue test fatigue property
作者简介 张海鹏,出生于1993年,男,硕士研究生,主要从事组合结构的研究。E-mail:zhpzju@foxmail,com;通信作者:陈驹,出生于1978年,男,工学博士,教授,主要从事组合结构的研究。E-mail:cecj@zju.edu.cn.
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