PBL剪力键的弹性静力解析解  

Analytical Solutions to Elastic Static Force of PBL Shear Connectors

作　　者：司秀勇[1] 刘丽芳 肖林[2] SI Xiuyong;LIU Lifang;XIAO Lin(School of Civil Engineering & Mechanics, Yanshan University, Qinhuangdao Hebei 066004, China;School of Civil Engineering, Southwest Jiaotong University, Chengdu Sichuan 610031, China)

机构地区：[1]燕山大学建筑工程与力学学院,河北秦皇岛066004 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《中国铁道科学》2018年第6期8-14,共7页China Railway Science

基　　金：国家自然科学基金资助项目(51308467);四川省科技厅国际合作项目(2015HH0058);中央高校基本科研业务费项目(2682016CX016)

摘　　要：基于Airy应力函数和Winkler弹性地基梁理论,进行钢混组合结构中PBL剪力键在工作状态下的弹性静力解析解研究。根据PBL剪力键在工作状态下的受力特性,将PBL剪力键简化为混凝土圆环与贯穿钢筋相互作用的力学模型。在假设混凝土圆环的接触应力为抛物线分布的条件下,借助Airy应力函数,求解其工作状态下的应力和位移的解析解;应用Winkler弹性地基梁理论,得出贯穿钢筋的应力和位移的解析解。运用该解析解和有限元对算例的计算结果进行对比,结果表明该PBL剪力键在工作状态下的弹性静力解析解是可靠的。Based on the Airy stress function and the theory of Winkler elastic foundation beam,the analytical solutions to elastic static force of PBL shear connectors in steel-concrete composite structures under working conditions were studied.According to the mechanical characteristics of PBL shear connectors under working conditions,PBL shear connector was simplified as a mechanical model for the interaction between concrete ring and penetrating steel bar.Under the assumption that the contact stress of concrete ring was parabolic distribution,the analytical solutions to the stress and displa cement under working conditions were solved by means of Airy stress function.The analytical solutions to the stress and displacement of penetrating steel bar were obtained by applying the theory of Winkler elastic foundation beam.The analytical solutions and the finite element method were used to compare the calculation results of the numerical example,which showed that the analytical solutions to the elastic static force of PBL shear connectors under the working conditions were reliable.

关 键 词：钢混组合结构 PBL剪力键 弹性静力 解析解 Winkler弹性地基梁 Airy应力函数 

分 类 号：U441[建筑科学—桥梁与隧道工程]