简谐荷载作用下组合梁动滑移响应分析  

Analytical dynamic slip solution for steel-concrete composite beams under harmonic load

作　　者：侯忠明[1,2] 夏禾[3] 张彦玲[4] 王元清[2] 

机构地区：[1]中冶建筑研究总院有限公司,北京100088 [2]清华大学土木工程系,北京100084 [3]北京交通大学土木建筑工程学院,北京100044 [4]石家庄铁道大学土木工程学院,石家庄050043

出　　处：《振动与冲击》2016年第2期18-23,30,共7页Journal of Vibration and Shock

基　　金：国家重点基础研究计划973项目(2013CB036203);国家自然科学基金项目(51178025;51108281);河北省高等学校科学技术研究项目重点课题(ZD2014025)

摘　　要：由于组合梁在外力作用下钢梁与混凝土板之间会发生相对滑移,进行结构受力计算时须考虑滑移所致影响,基于组合梁基本动力理论,获得集中简谐荷载作用下组合梁挠度响应表达式,据挠度、滑移微分方程获得动滑移响应表达式。经一系列数学变换使动滑移响应表达式的静态分量部分满足级数求和条件。对比分析理论与实测结果表明,二者吻合良好。可将静滑移结果视为动滑移的特殊形式,简谐荷载分量对组合梁有效滑移影响较小,对连接件受力性能影响较大。A relative slip will occur at the interface between steel girder and concrete slab of a composite beam when it is subjected to external loads, which should be taken into account in structural analyses. Based on the fundamental dynamic theory, an analytical deflection solution to simply-supported composite beams under concentrated harmonic load was derived, and according to the differential relationships between the deflection and slip, the dynamic slip response was obtained. The static component in the dynamic slip expression was made to meet the series summation conditions by applying a series of mathematical transformations. The theoretical results were compared with the experimental ones, showing a good agreement. The analysis results show that the static slip can be essentially counted as a special case of dynamic response, and the harmonic component has a relatively small effect on the effective slip, but a great influence on the mechanical performance of shear connectors.

关 键 词：钢-混组合梁 滑移响应 解析方法 动力理论 滑移共振 试验研究 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]