基于最小势能原理薄壁悬臂箱梁的剪力滞问题研究  

The Research on the Shear Lag of Thin-walked Box Girder Based on the Minimum Potential Energy Principle

作　　者：余必龙 

机构地区：[1]同济大学结构工程与防灾研究所,上海200092

出　　处：《佳木斯大学学报（自然科学版）》2017年第2期199-201,共3页Journal of Jiamusi University：Natural Science Edition

摘　　要：薄壁箱梁中翼板的剪力滞效应,使得翼板内正应力分布不均匀。实际工程中按材料力学的方法计算翼板,这样得到的翼板厚度不足以承担实际的荷载,留下了工程隐患。本文依据弹性力学最小势能原理,运用matlab工具计算一工程实例,分析了悬臂箱梁剪力滞效应,并与有限元分析软件建模结果进行对比,对工程设计具有一定借鉴意义。The shear - lag effect of the middle plate in the thin - walled box girder can cause an uneven distribution of normal stress on the flange. Parameters of the flange are calculated by mechanics of materials in the actual projects, but the thickness of the wing is insufficient to actual load, which leaves project risks. Based on the principle of minimum potential energy of elastic mechanics, this paper calculates engineering project by using Matlab, analyzes the shear - lag effect of cantilever box girder, and compares the results with the modeling outcome by finite element analysis software, which has certain reference for engineering design.

关 键 词：薄壁箱梁 剪力滞 最小势能原理 有限元分析 

分 类 号：U448.36[建筑科学—桥梁与隧道工程]