摘要
通过对单箱三室双层交通混凝土简支箱梁模型进行试验研究,对其在上层荷载、下层荷载、上下层荷载3种不同工况的双层均布荷载作用下的剪力滞效应进行分析。结果表明:均布荷载作用下,箱梁跨中截面与1/4跨截面顶板均呈现出正剪力滞现象;在弹性工作阶段双层交通混凝土简支箱梁剪力滞效应与荷载作用大小无关,与荷载作用位置有关;荷载作用在底板引起的箱梁剪力滞效应比荷载作用在顶板引起的剪力滞效应小;当将作用在箱梁顶板的荷载一部分转移到底板时,能减小箱梁的剪力滞效应。
Through the experimental study on the model of the single-box three-rooms double-deck concrete simple box girder, analyzed the shear lag of the box girder under the double uniformly distributed loads of three different conditions. The results showed that： the shear lag effect on the roof of midspan section and 1/4 cross-section both showed positive shear lag phenomenon; the shear lag effect has nothing to do with the size of the load but with the location of the load under elastic stage; when the loads applied on the base plate, the shear lag effect are smaller than the situation that the loads applied on the upper plate; when transferring part of the load from top plate to the bottom plate, the shear lag effect of box girder will reduce.
出处
《湖南工业大学学报》
2013年第4期23-28,共6页
Journal of Hunan University of Technology
基金
湖南省教育厅科研基金资助重点项目(10A029)
关键词
简支箱梁
剪力滞效应
双层荷载
simple box girder
shear lag effect
double-level
