单跨简支渡槽剪力滞效应分析  

An Analysis of Single Span Simply-supported Aqueduct Bridges from the Perspective of Shear Lag Effect

作　　者：李遇春[1] 王立时[1] 袁纯强[1] 

机构地区：[1]同济大学土木工程学院,上海200092

出　　处：《中国农村水利水电》2012年第5期146-149,154,共5页China Rural Water and Hydropower

摘　　要：应用ANSYS程序建立了几种不同渡槽槽体结构的有限元模型,数值结果表明,采用板壳单元能很好地模拟槽体的剪力滞效应,计算精度满足工程要求。对单跨简支单箱、多箱槽体的剪力滞效应进行了较详细的数值研究,得到了槽体底板与上部翼缘的纵向正应力分布规律,研究了渡槽的截面形式、宽跨比等参数对渡槽剪力滞效应的影响。研究结果对渡槽结构设计具有参考价值。In this paper, several kinds of finite element models of aqueduct bodies have been created by using ANSYS Code. The nu- merical results indicate that the shell element can simulate the shear lag effect of the aqueduct bodies well in view of the accuracy of engineering requirements. This paper discusses the shear lag effects of the simply-supported single-box and multi-box aqueduct bridges in detail by means of the numerical method, which results in obtaining the longitudinal normal stress distribution of the bot- tom and upper flange of the aqueduct bodies. According to the results of calculations, the cross-section shape and width-span ratio of the aqueduct bodies are the main factors which have effect on the shear lag of the aqueduct bodies. The research results function as a reference to the structural design of aqueduct-bridges.

关 键 词：简支渡槽 剪力滞效应 有限元 

分 类 号：TV332[水利工程—水工结构工程]