连续刚构桥顶板纵向裂缝成因分析及设计反思  

Causes Analysis and Design Rethink for Longitudinal Crack of Box Roof of Continuous Rigid Frame Bridge

作　　者：李琦[1,2] 刘清春[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067 [2]西南交通大学土木工程学院,成都610031

出　　处：《交通科技》2012年第3期38-40,共3页Transportation Science & Technology

摘　　要：结合某高速公路全线的4座连续刚构桥的箱梁裂缝病害情况,对预应力混凝土连续刚构桥的常见病害进行了分析,并重点分析了箱梁的顶板裂缝病害成因,对原设计进行了反思,探讨了结构设计中应当注意的构造尺寸、配筋等细节问题,并给出了相应的优化建议。Combined with the crack defect of box girder of 4 continuous rigid frame bridges in express- way, the common disease of pre-stressed concrete continuous rigid frame was introduced and ana- lyzed. The reason of the crack defect of top-slab of box girder was analyzed, and the reflection wasmade on initial design some problems. Were explored in design, such as structure size and reinforce- ment etc. At last the optimization suggestion was summarized.

关 键 词：连续刚构 顶板纵向裂缝 成因分析 设计反思 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]