中文摘要：

为研究PBL剪力键的疲劳性能,进行6组PBL剪力键试件的正交疲劳试验。试件基于EC4的标准推出试验构造,采用不同的疲劳荷载幅进行加载;测试开孔钢板、贯穿钢筋、混凝土板的应变,以及残余滑移量;得到PBL剪力键的疲劳破坏形态,疲劳荷载与疲劳寿命、残余滑移量之间的相对关系,以及PBL剪力键疲劳性能的影响因素。研究结果表明：PBL剪力键的疲劳性能优秀;所研究的试件,疲劳破坏形式皆为混凝土板的开裂;残余滑移量能表征PBL剪力键的疲劳损伤累积过程,根据残余滑移量的发展,可以将PBL剪力键的疲劳破坏过程分为3个阶段;根据疲劳试验结果,可以建立PBL剪力键的疲劳寿命与相对疲劳强度、疲劳荷载峰谷值之间的关系式;PBL剪力键的疲劳性能与混凝土强度、剪力键的构造尺寸（主要是开孔钢板孔径及厚度）等相关。

英文摘要：

Orthotropic tests of 6 groups of specimens were conducted to investigate the fatigue performance of PBL shear connectors. Designed according to standard push-out tests of Eurocode 4,the test specimens were tested under variable fatigue amplitude. The strains and residual relative slippage of perforated plates,transverse rebars and concrete slabs were respectively tested. The failure modes of PBL shear connectors,the impact factors of fatigue performance,the relationship between fatigue load and fatigue lifetime,and relationship between fatigue load and residual relative slippage were obtained. The research results show that PBL shear connectors have good fatigue performance and the fatigue failures of PBL shear connectors manifest as cracks of concrete slabs. On basis of residual relative slippage,which characterizes the fatigue damage accumulation process,the fatigue failure of PBL shear connectors can be divided into 3stages. A relationship formula between fatigue lifetime of PBL shear connector,the relative fatigue strength and the Max /Min load is deduced from the test results. The fatigue performance of PBL shear connector is influenced by the concrete strength and structural dimensions of test specimens,especially the diameters of perforated holes and thickness of perforated plates.