变高度箱梁桥剪力滞效应的三结合分析法  

Combining Analysis with Three Methods for Shear Lag Effect of Box Girder Bridge with Varying Depths

作　　者：程翔云[1] 李立峰[1] 

机构地区：[1]湖南大学土木工程学院,长沙市410082

出　　处：《公路》2008年第1期104-108,共5页Highway

摘　　要：应用初等梁弯曲理论公式与平面杆系有限元法以及有限条法程序相结合的方法,建立了分析变高度箱梁桥剪力滞效应的计算模型。从两个算例(连续梁桥和悬臂梁桥)的计算结果发现,应用本文模型算得的箱梁翼缘正应力沿横桥向的分布,与应用空间有限元法和有限条法算得的分布,吻合甚好。因此,本文方法具有实用价值,可供设计者选用。Applied the method which combined the elementary theoretical formulae of flexure with computer program of plane finite element method and finite strip method, the calculating model to analyze the shear lag effect of box girder bridge with varying depths is established. From two examples （continuous and cantilever beam bridges）, it is discovered that the the calculation results of transverse normal stress distributions in the flange of box girder obtained by this model are very good coincided with those by methods of space finite element and finite strip. Therefore, the method of this paper has the practical significance and may be selected to use for designer.

关 键 词：剪力滞效应 变高度箱梁 有效翼缘宽度 有限条法 平面杆系有限元法 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]