正交异性组合桥面板界面滑移效应研究

发布时间：2018-03-26 06:26

本文选题：正交异性钢桥面板　切入点：钢-混组合结构　出处：《桥梁建设》2017年01期

【摘要】：钢-混组合桥面板常规计算中忽略了钢桥面板与混凝土桥面板界面间的相对滑移,无法反映由相对滑移导致的组合效应降低以及层间的荷载重分配。为研究界面滑移模拟方法、界面滑移对钢-混组合结构的组合效应以及受力性能的影响,基于钢桥面板与混凝土桥面板的受力特性和变形协调条件,推导界面相对滑移微分方程,给出考虑滑移条件下的挠度计算公式;并依托海口东海岸如意岛跨海大桥项目,选取包含1个纵肋的单梁,通过有限元分析和足尺模型试验对跨中挠度、钢-混界面和栓钉滑移等进行分析。结果表明:随着荷载增大,界面滑移不断增大,且增加的速度越来越快,对组合效应的削弱和对受力性能的影响也更为明显;为得出准确的受力和变形结果,应考虑界面滑移效应;文中提出的界面滑移模拟方法能揭示界面滑移对组合效应和受力性能的影响规律。
[Abstract]:In the conventional calculation of steel-concrete composite deck slab, the relative slip between steel deck slab and concrete deck slab is neglected, which can not reflect the reduction of combination effect caused by relative slip and the redistribution of load between layers. The influence of interface slip on the combination effect and mechanical performance of steel-concrete composite structure is discussed. Based on the stress characteristics and deformation coordination conditions of steel deck slab and concrete deck slab, the differential equation of interface relative slip is derived. The calculation formula of deflection under the condition of considering slip is given, and based on the project of Ruidao Bridge on the east coast of Haikou, a single beam with one longitudinal rib is selected, and the deflection of the span is calculated by finite element analysis and full-scale model test. The results show that the interfacial slip increases with the increase of load, and the increasing speed is faster and faster, and the combination effect is weakened and the effect on the mechanical performance is more obvious. In order to obtain accurate results of stress and deformation, the slip effect of interface should be considered, and the simulation method of interface slip in this paper can reveal the law of the influence of interface slip on the combination effect and mechanical performance.
【作者单位】：西南交通大学土木工程学院;
【基金】：自然科学基金项目(51178394,51578455) 国家科技支撑计划项目(2011BAG07B03) 中央高校基本科研业务费专项资金资助项目(2682014CX078)~~
【分类号】：U443.31

【相似文献】