跨度48m半穿式钢桁梁横向刚度加固研究  

A Study of How to Improve the Transverse Rigidity of the 48-m Middle-Through Steel Truss Girder

作　　者：张维超 

机构地区：[1]中铁十局集团公司,山东济南250001

出　　处：《国防交通工程与技术》2007年第2期24-27,共4页Traffic Engineering and Technology for National Defence

摘　　要：理论分析了京沪线某既有一孔半穿式钢桁梁桥提速后横向振幅超限的原因,提出采用增大主桁下弦截面和加大下平纵联斜撑杆件截面积的方法进行加固,实践证明该加固设计方案对提高半穿式钢桁梁桥横向刚度具有施工简便、经济、加固效果良好的特点。The reason why the lateral amplitude of one existing middle-through steel truss girder on the Beijing-Shanghai Railway surpasses the limit after the train is sped up is theoretically analyzed in the paper, with measures to improve the lateral rigidity and the reinforcing design method presented, in which case both the cross-section of the bottom chord of the main truss and the cross-sections of the lower plain longitudinal connectors and diagonal braces are enlarged. And after it is put into practice, the reinforcing effect turns out to be fairly satisfactory.

关 键 词：半穿式钢桁梁 横向振幅 加固设计 

分 类 号：U441.3[建筑科学—桥梁与隧道工程] U448.36[交通运输工程—道路与铁道工程]