大跨径圬工拱桥合理加固次序设计方法  

Reasonably Strengthening Sequence Design Method for Long-Span Masonry Arch Bridge

作　　者：刘思孟[1,2] 张立永[1] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]重庆大学土木工程学院,重庆400045

出　　处：《重庆交通大学学报（自然科学版）》2013年第6期1148-1152,共5页Journal of Chongqing Jiaotong University(Natural Science)

基　　金：重庆市教育委员会科学技术研究项目(KJ130016)

摘　　要：为解决圬工拱桥加固过程中加固与加载程序设计问题,从圬工拱的极限承载力计算方法入手,引入了偏心距影响线的概念,采用影响线与反映偏心距变化的阶线图作为工具,通过控制加固施工过程中截面合力偏心距e不超过容许值e0或预设值,提出了大跨径圬工拱桥合理加固次序的设计方法——阶线法。以一座3×100 m混凝土箱板拱桥的加固次序设计过程为例,检验了方法的可行性。The concept of eccentricity influence line was introduced to solve the design problems in the process of strengthening masonry arch bridge and loading the program,starting from the calculation method of the ultimate loading capacity for masonry arch bridges. And the influence lines and the stage-varied lines which reflected the variation of eccentricity were utilized as tools. Eventually,the reasonably strengthening sequence design method—stage-varied line method was proposed,by controlling the eccentricity of the cross-section e,which should be less than allowable or pre-set value e0within all stages of the strengthening construction. In order to validate the method,a case study for strengthening sequence design of a 3 ×100 m concrete arch bridge was carried out.

关 键 词：加固次序设计 偏心距影响线 阶线法 拱桥加固 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]