剪力键抗剪刚度对组合梁桥收缩徐变的影响分析  

Influence of Shear Stiffness of Shear Key on Shrinkage and Creep of Composite Beam Bridge

作　　者：鹿俊杰 赵青 LU Junjie;ZHAO Qing(Anhui Jianzhu University, Hefei 230601, China)

机构地区：[1]安徽建筑大学土木工程学院,安徽合肥230601

出　　处：《洛阳理工学院学报（自然科学版）》2021年第4期34-38,共5页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

摘　　要：为研究剪力键抗剪刚度对组合梁桥收缩徐变的影响,根据收缩徐变的本构模型,依托工程实例用有限元软件分析,总结出剪力键抗剪刚度对挠度和应力的影响规律。结果表明:跨中截面挠度随着剪力键刚度的增加而增大,第一跨跨中截面混凝土桥面板应力随剪力键刚度的增加而增大,而第二跨跨中截面混凝土桥面板应力随剪力键刚度的增加先增大后减小,且钢梁应力随剪力键刚度的增加而减小。In order to study the influence of shear stiffness of shear key on the shrinkage and creep of composite beam bridge,the shrinkage and creep constitutive model is obtained.Based on the engineering project,the influence law of shear stiffness of shear key on deflection and stress is summarized by using finite element analysis software.The conclusions show that the deflection of midspan section increases with the increase of shear key stiffness.The stress of concrete bridge deck in the middle section of the first span increases with the increase of shear key stiffness,while that of the second span increases first and then decreases with the increase of shear key stiffness,and the stress of steel beam decreases with the increase of it.

关 键 词：钢混组合梁桥 收缩徐变 有限元分析软件 抗剪刚度 

分 类 号：U446.2[建筑科学—桥梁与隧道工程]