摘要
以上世纪70年代建成的某座双曲拱桥为工程实例,分析了该桥的病害特点,并给出了双曲拱桥加固维修的常规方法。重点讨论了增大主拱圈截面面积进行拱肋加固的两种方法。并结合有限元计算,对加固后结构的承载力、裂缝以及挠度进行了验算,通过对比分析计算结果表明:加固后桥梁的受力性能均能满足规范要求,从结构受力性能上来讲,变拱肋为拱箱的加固方法较锚喷钢筋混凝土加固方法更具优势。
Using a double-curved arch bridge built in the 1970s as an engineering example, the conventional method of rein- forcement and maintenance for double-curved arch bridge is proposed through disease characteristics analysis of this specific bridge. This paper focuses on two arch rib reinforcement methods of increasing main arch ring section area. Then the bearing capacity, crack and deflection of structure after reinforcement are checked combining with finite element computation. The calculated results indicate that all the mechanical behaviors of bridge after strengthening conform to code requirements. Besides, in comparison with the anchor spray cement concrete method, the reinforcement method of changing arch rib for arch box is dominant on structure mechanical behaviors.
出处
《广东公路交通》
2014年第2期36-39,共4页
Guangdong Highway Communications
关键词
双曲拱桥
加固
计算分析
double-carved arch bridge
reinforcement
calculating analysis
