锚栓与粘钢连接件抗剪承载性能试验研究

打开文本图片集

中图分类号：U445文献标识码：A

Experimental Study on Shear Performance of Steel-Concrete Interface Bonded with Bolt and Epoxy

YE Saiwei’，WU Wenming²，LIU Rong' （1. College of Civil and Transportation Engineering，Hohai University，Nanjing，Jiangsu 21Oo24，China; 2.Beijing Gongke Reinforced Bridge Technology Co.，Ltd.，Beijing 10oO88，China）

Abstract：To further obtain the shear capacity of the steel-concrete interface connected by bolts and epoxy，three sets of push-out tests were made and analyzed，including bolt reinforcement specimens， epoxy reinforcement specimens and bolt and epoxy reinforcement specimens. The failure mode，shear force-displacement curve，ultimate bearing capacity and shear stiffness were measured by the push-out test.The research shows that the stiffess of bolt reinforcement specimens is much smaller than that of epoxy reinforced specimens，and the slip before reaching the ultimate shear strength is much larger than that of epoxy reinforced specimen.Before reaching the peak load，for the specimens with fewer anchor bolts，the epoxy bears almost all the load，and the specimens slip obviously when the specimen was damaged. This paper puts forward a more widely used calculation formula used to calculate the shear capacity of bolt and epoxy reinforcement specimens，which can be used in the calculation of shear capacity of large-area reinforcement specimens and high-strength concrete reinforcement specimens.

Key words：bridge strengthen；shear strength； push-out test； steel-concrete bond；bolt and epoxy

改革开放以来大规模修建的钢筋混凝土桥梁，随着时间的推移，普遍出现混凝土开裂、梁体下挠及车辆荷载增加等问题，严重影响桥梁结构正常运行及耐久性[1-2]。（剩余8952字）