钢桁腹预应力混凝土组合梁桥的剪滞效应  

Study on Shear-lag Effect of Steel Truss-web and Pre-stressed Concrete Composite Girder Bridge

作　　者：刘朵[1] 张建东[1] 刘钊[2] 

机构地区：[1]江苏省交通科学研究院,江苏南京211112 [2]东南大学,江苏南京210096

出　　处：《水利与建筑工程学报》2013年第6期73-77,共5页Journal of Water Resources and Architectural Engineering

基　　金：江苏省自然科学基金面上项目(BK2009028);部省联合攻关项目(2009-353-333-300)

摘　　要：钢桁腹预应力混凝土组合梁桥在截面形式上采用桁式腹杆和混凝土顶底板,由于剪切变形的不均匀性,使得组合箱梁在纵向弯曲时产生较为明显的剪滞效应。以某钢桁腹混凝土组合梁桥为例,利用空间实体模型分析了剪滞效应和有效宽度分布规律,并研究了顶底板厚度及钢管壁厚对剪滞效应的影响,为今后同类桥型的设计提供参考。The steel truss-web and pre-stressed concrete composite girder bridge consists of two parts： steel truss-web and top-and-bottom concrete board. Because the distribution of shear deformation is non-uniform, the composite box girder bridge has the obvious shear-lag effect under longitudinal bending. Taking a steel truss-web and pre-stressed concrete composite girder bridge for example, the shear-lag effect and the distribution law of effective width are analyzed by the fi- nite element modal of space, and the effects of top-and-bottom thickness and steel pipe thickness on the shear-lag effect are studied here so as to provide references for the similar design in the future.

关 键 词：钢桁腹预应力混凝土组合梁桥 剪滞效应 有效宽度 顶底板厚度 

分 类 号：U445.462[建筑科学—桥梁与隧道工程]