桥梁加固薄弱受弯构件承载力极限状态计算.pdf

Vol21 　No 6 公 　路 　交 　通 　科 　技 2004 年 6 月 JOURNAL OF HIGHWAY AND TRANSPORTATION RESEARCH AND DEVELOPMENT 文章编号 : (2004) 桥梁加固薄弱受弯构件承载力 极限状态计算 1 1 ,2 1 张树仁 , 宋建永 , 王 　彤 ( 1 哈尔滨工业大学 , 黑龙江 　哈尔滨 　150090 ; 2 交通部公路科学研究所 , 北京 　100088) 摘要 : 桥梁结构一般采用带载加固 , 其承载力应按两阶段受力构件计算。首先分析加筋和加混凝土两类受弯构件正截 面承载力计算方法和计算公式。另外在试验研究的基础上建立考虑两阶段受力影响的桥梁加固钢筋混凝土受弯构件斜 截面承载力计算公式和实用条件 , 分析两阶段受力对箍筋、弯起钢筋、混凝土和后加补强斜钢板抗剪承载力的影响。 最后给出桥梁加固薄弱受弯构件设计实用计算方法。 关键词 : 桥梁加固 ; 分阶段受力 ; 正截面承载力 ; 斜截面承载力 ; 公式适用条件 中图分类号: U44572 　　　　　　文献标识码 : A Analysis of Ultimate Loadcarrying Capacity of Strengthened Weak Bending Member of Bridge s 1 1 ,2 1 ZHANG Shuren , SONG Jianyong , WANG Tong ( 1Harbin Institute of Technology , Heilongjiang 　Harbin 　150090 , China ; 2Research Institute of Highway of Ministry of Communications , Beijing　100088 , China) Abstract : The ultimate loadcarrying capacity of strengthened weak bending member of bridges should be calculated by 2stage loading methodThe analysis method and calculation expressions of loadcarrying capacity of cross section of weak bending members strengthened by steel bar or concrete are established firstlyThe calculation method and expressions of loadcarrying capacity of inclined section of strengthened weak bending member and its application conditions are discussed on the basis of test analyses , and the influences of