既有桥梁钢结构构件的检算与加固研究  

Study on Check of Existing Steel Structure and Bridge Strengthening

作　　者：杨美良[1] 张建仁[1] 李传习[1] 

机构地区：[1]长沙理工大学,湖南长沙410076

出　　处：《公路交通科技》2006年第S1期51-54,共4页Journal of Highway and Transportation Research and Development

基　　金：西部交通建设科技项目(200131822358)

摘　　要：从钢梁的强度、刚度、稳定和疲劳等方面阐述了既有桥梁钢结构构件的检算原理,介绍了桥梁加固原则。针对规范[1]中按传统的弹性平板屈曲理论计算钢箱梁受压翼缘临界应力偏高和压弯构件弯扭屈曲计算未考虑附加弯矩对屈曲弯矩影响等不足,运用能量法则,提出了修正方法,对检算与加固有借鉴作用。The check theory of strength,stiffness,stability and fatigue for steel structures is presented.The bridge strengthening principles are introduced.The disadvantages of the critical stress of the pressed flanges and the interaction formula for the lateral-torsional buckling of beam-columns in code for design of steel structure are modified.These can give reference to the check and strengthening of bridges.

关 键 词：钢结构 钢箱梁 检算 加固 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]