以截面平衡原理分析各种桥型结构体系  

Analysis of Structural Systems of Various Bridge Types on Principle of Sectional Equilibrium

作　　者：梅秀道[1] 汪正兴[1] 王天亮[1] 李星新[1] 

机构地区：[1]中铁大桥局集团桥科院有限公司,湖北武汉430034

出　　处：《桥梁建设》2007年第A02期107-110,共4页Bridge Construction

摘　　要：从材料力学中构件截面抗弯、抗剪平衡原理出发,分析桥梁的横截面、纵向桥型体系的受力特点,并以梁的受力方式来理解常用的纵向受力体系,如拱、斜拉、悬索等结构体系,称之为"等代梁"。从而将常见桥型分为两类:按正弯矩设计的体系,如简支梁、拱桥、悬索桥;按负弯矩设计的体系,如T构、连续梁、连续刚构和斜拉桥。提出了以组合体系来解决目前常见大跨径梁式桥常见病害的看法。On the principle of the bending and shearing equilibrium of structural element sections in the material mechanics, this paper analyzes the force characteristics of bridge cross sections and structural systems of longitudinal bridge types, and acquires an understanding of the commonly-used longitudinal structural systems, such as the arch, cable-stayed and suspension systems in a way of force bearing of girders, which are herein referred to as ＂equivalent girders＂. As a consequence, the paper further classifies the common bridge types into two kinds, i.e. the structural systems designed in terms of positive bending moment, such as the simple-supported girder bridge, arch bridge and suspension bridge and the systems designed in terms of negative bending moment, such as the T-frame bridge, continuous girder bridge, continuous rigid-frame bridge and cable-stayed bridge, and finally the paper gives ideas of coping with the common deteriorations of the current long span girder type bridges by utilization of composite structural system.

关 键 词：桥梁 桥型 结构体系 等代梁 结构分析 

分 类 号：U448.2[建筑科学—桥梁与隧道工程]