单箱双室组合箱梁剪力滞效应分析

发布时间：2018-01-19 23:29

本文关键词： 钢-混凝土组合箱梁剪力滞效应能量变分法滑移　出处：《建筑科学与工程学报》2017年06期 　论文类型：期刊论文

【摘要】：通过对组合箱梁底板、混凝土顶板与悬臂翼板引入不同的剪滞翘曲位移函数,利用能量变分法推导出考虑界面相对滑移、钢腹板剪切变形和剪力滞效应的微分方程及均布荷载作用下的解析解。以带有悬臂翼板的单箱双室组合箱梁为例,运用提出的解析法对其剪力滞效应进行分析,并与ANSYS有限元结果对比。结果表明:提出的解析法所得结果与ANSYS空间有限元计算结果吻合良好;界面滑移量和挠度随着滑移刚度的增大而增加,而剪力滞效应则无较明显的变化,因此在一定条件下可忽略滑移刚度对剪力滞效应的影响;混凝土顶板应力随着滑移刚度的增大而增大,且中腹板部位处顶板的剪力滞效应较边腹板部位处大,而钢箱梁底板则与之相反。
[Abstract]:Through introducing different displacement function of shear lag warpage to the bottom slab of composite box girder, concrete roof and cantilever wing, the relative slip of interface is deduced by energy variation method. Differential equation of shear deformation and shear lag effect of steel web and analytical solution under uniform load. The shear lag effect of single box and double chamber composite box girder with cantilever wing plate is analyzed by using the proposed analytical method. The results are compared with the results of ANSYS finite element method. The results show that the results obtained by the proposed analytical method are in good agreement with the results obtained by the finite element method in ANSYS space. The slip amount and deflection of the interface increase with the increase of the slip stiffness, but the shear lag effect has no obvious change, so the influence of slip stiffness on the shear lag effect can be neglected under certain conditions. The stress of the concrete roof increases with the increase of the slip stiffness, and the shear lag effect of the roof at the middle web is greater than that at the side of the web, but the bottom plate of the steel box girder is opposite.
【作者单位】：重庆大学土木工程学院;重庆大学山地城镇建设与新技术教育部重点实验室;中铁二十一局集团第五工程有限责任公司;
【基金】：重庆市自然科学基金项目(CSTC,2010BB6048)
【分类号】：TU398.9
【正文快照】： 重庆400045;3.中铁二十一局集团第五工程有限责任公司,重庆400025)0引言钢-混凝土组合箱梁通过抗剪连接件将混凝土顶板与钢箱梁紧密连接在一起共同受力,以便充分发挥2种材料的性能[1]。由于抗剪连接件的刚度并非无穷大,因此在钢箱梁和混凝土顶板接触面之间将产生相对滑移;同时

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