连续刚构桥箱梁L/4截面腹板裂缝成因分析  

Analysis on Causes of the Web Plate Crack at L/4 Section of a Continuous Rigid Frame Bridge

作　　者：肖光宏[1] 张秋陵[1] 

机构地区：[1]重庆交通大学,重庆400074

出　　处：《重庆交通大学学报（自然科学版）》2010年第6期846-848,共3页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：连续刚构桥梁箱梁腹板裂缝大多出现在0号块的腹板上,在跨中出现腹板裂缝的较少。根据重庆某大桥箱梁L/4截面处出现的裂缝位置、走向及分布,结合现场施工情况分析了裂缝形成和发展的原因,认为前后现浇节段的浇注时间相差过大是裂缝发生的主要原因之一。The web cracks of box girder usually appear in the 0 block of continuous rigid frame bridge.According to location,direction and distribution of the web crack at L/4 section of box girder of a bridge in Chongqing,this paper analyzes the causes of the appearance of crack and the development of crack on the basis of on-site construction work.It is indicated that the pouring time difference between the former segment and the latter segment is the main cause for crack formation and development.

关 键 词：腹板裂缝 成因 分析 

分 类 号：U448[建筑科学—桥梁与隧道工程]