钢筋混凝土加固砖砌体拱涵承载力计算方法  

Calculation method of bearing capacity of strengthening brick culvert masonry arch reinforced by reinforced concrete

作　　者：梁建国 李壮 马帅 姚明星 王高峰 李聪 LIANG Jianguo;LI Zhuang;MA Shuai;YAO Mingxing;WANG Gaofeng;LI Cong(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;Changsha Water Group Co.,Ltd.,Changsha 410015,China;Changsha Public Engineering Construction Center,Changsha 410013,China;China Construction Fifth Engineering Division Co.,Ltd.,Changsha 410004,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]长沙水业集团有限公司,湖南长沙410015 [3]长沙市公共工程建设中心,湖南长沙410013 [4]中国建筑第五工程局有限公司,湖南长沙410004

出　　处：《交通科学与工程》2023年第2期55-61,共7页Journal of Transport Science and Engineering

基　　金：2020年长沙市政府“红旗渠主渠结构加固试验段工法研究及实施”项目。

摘　　要：针对采用高性能钢筋混凝土对排水主渠砌体拱涵结构进行非开挖加固时关于承载力的计算问题,提出了拱腹加固砌体的拱涵、拱顶和拱趾的正截面承载力计算公式。依据拱腹加固砌体的拱涵受力特点,提出了内力计算简图。研究结果表明:采用拱腹高性能钢筋混凝土进行非开挖加固修复,可有效阻止塑性铰的出现;当砌体拱涵拱腹采用增大截面法加固时,计算简图可采用无铰拱计算,并通过实例进行验证,发现本方法的计算结果与试验数据吻合良好,可为类似砖砌体排水拱涵加固设计提供借鉴。By aiming at the lack of bearing capacity calculation method in the current standard for trenchless reinforcement and repair of existing drainage main channel masonry arch culvert with arch vamp high-performance reinforced concrete,the design calculation formula of bearing capacity of the normal section of the arch roof and arch toe of arch culvert reinforced with arch vamp was proposed.Based on the analysis of the stress characteristics of masonry arch culvert reinforced by the arch belly,the calculation diagram of internal force was put forward.Based on basic assumptions,the design formula of bearing capacity of the normal section of the arch and toe was obtained.The results showed that the trenchless reinforcement and restoration with arch high-performance reinforced concrete could effectively prevent the emergence of plastic hinges.When the arch belly of a masonry arch culvert was strengthened by the method of the increasing section,the calculation schematic diagram could be calculated by the hingeless arch.The experimental data were used to verify the theoretical formula,which was in good agreement with the experimental data,which could be used for reference for the design of drainage arch culverts reinforced with brick masonry.

关 键 词：增大截面法 高性能混凝土 排水拱涵 非开挖修复 正截面承载力 

分 类 号：TU31[建筑科学—结构工程]