基于有限元方法的PBL剪力键承载力分析  

Analysis on Shear-capacity of PBL Shear Connectors based on finite Element Analysis Method

作　　者：周勇超[1] 王丁丁 ZHOU Yong-chao;WANG Ding-ding(School of Highway,Chang'an University,Xi'an 710064,China)

机构地区：[1]长安大学公路学院,西安市710064

出　　处：《公路》2022年第8期109-113,共5页Highway

基　　金：国家自然科学基金资助项目,项目编号52078044。

摘　　要：为深入了解PBL剪力键承载时的传力机理以及破坏模式,通过ABAQUS模拟软件建立PBL剪力键的精细化有限元仿真模型,详细介绍了剪力键的建模过程以及材料本构关系的处理。首先,将有限元模型得出的数值解与PBL剪力键试验结果对比,验证了数值模拟方法的可靠性;其次,对抗剪滑移曲线进行了分析,验证了剪力键破坏大致分为弹性上升段和塑性屈服段;最后,对PBL剪力键的抗剪全过程的主要影响因素进行了分析。结果表明,混凝土榫提供了弹性阶段PBL剪力键的抗剪刚度;抗剪承载力主要受贯通钢筋直径大小的影响,并随着贯通钢筋直径增大而提高。In order to deeply understand the shear transfer mechanism and the failure mode of PBL shear connectors, the fine finite element simulation model of PBL shear connectors is established by using simulation software of ABAQUS. The modeling process and material constitution of shear connectors are introduced in detail. Firstly, by comparing with the test result of PBL shear connector, the reliability of the numerical simulation method is verified. Secondly, the load slip curve is analyzed, and it is verified that the failure of shear connector is roughly divided into elastic rising section and plastic yield section. Finally, the main influencing factors of the whole shear process of shear connector are deeply discussed, and the shear stiffness of PBL connector in elastic stage is mainly provided by concrete tenon. The diameter of through reinforcement has a significant impact on the shear bearing capacity, and the larger the diameter of through reinforcement, the higher the shear bearing capacity.

关 键 词：桥梁工程 PBL剪力键 有限元 全过程仿真 非线性 精细化分析 

分 类 号：U441.5[建筑科学—桥梁与隧道工程] U443.37[交通运输工程—道路与铁道工程]