预应力混凝土连续箱梁体外预应力加固实例分析
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摘要
体外预应力加固方法比传统的加固方法有概念明确、加固效果显著的优点。文中以哈尔滨市某预应力混凝土现浇连续梁高架桥为背景,简单介绍了体外预应力加固体系及体外束的布置方式,通过桥梁加固前后静力荷载试验数据分析,得出该桥通过体外预应力加固后,其结构整体刚度、承载能力得到显著改善,满足了原设计荷载要求,实现了预期的加固效果。
The external prestressing reinforcement method has a clearer concept and a stronger reinforcement effect than the traditional reinforcement method. Based on a background of a prestressed concrete viaduct with cast-in-place continuous beams in Harbin, this paper briefly introduces the external prestressed reinforcement system and the arrangement of the external beam. Through the analysis of the static load test data before and after the bridge reinforcement, it is concluded that the overall stiffness and bearing capacity of the bridge is significantly improved after reinforcement, which satisfies the original design load requirements and achieves the expected reinforcement effect.
The external prestressing reinforcement method has a clearer concept and a stronger reinforcement effect than the traditional reinforcement method. Based on a background of a prestressed concrete viaduct with cast-in-place continuous beams in Harbin, this paper briefly introduces the external prestressed reinforcement system and the arrangement of the external beam. Through the analysis of the static load test data before and after the bridge reinforcement, it is concluded that the overall stiffness and bearing capacity of the bridge is significantly improved after reinforcement, which satisfies the original design load requirements and achieves the expected reinforcement effect.
引文
[1]殷小龙,张利,程歆琛.浅谈体外预应力加固技术及应用[J].长春工程学院院报(自然科学版),2016, 7,(3):30-34.
[2]杨坚.体外预应力加固机理研究[D].昆明:昆明理工大学,2008.
[3]段智馨.体外预应力技术加固连续刚构桥梁的实例应用[J].中外公路,2013(4):179-181.
[4]安定宇.体外预应力法加固连续刚构桥实例分析[J].北方交通,2016(6):52-55.
[5]李英田.体外预应力混凝土简支T梁抗弯试验研究[D].广州:广东工业大学,2014.
[6]杜拱辰.现代预应力混凝土结构[M].北京:中国建筑工业出版社,2005.
[7]柳炳康,吴胜星.工程结构鉴定与加固[M].北京:中国建筑工业出版社,2000.
[8]张迎霞.体外预应力悬索分载法加固混凝土梁的试验研究与理论分析[D].武汉:武汉理工大学,2005.
[2]杨坚.体外预应力加固机理研究[D].昆明:昆明理工大学,2008.
[3]段智馨.体外预应力技术加固连续刚构桥梁的实例应用[J].中外公路,2013(4):179-181.
[4]安定宇.体外预应力法加固连续刚构桥实例分析[J].北方交通,2016(6):52-55.
[5]李英田.体外预应力混凝土简支T梁抗弯试验研究[D].广州:广东工业大学,2014.
[6]杜拱辰.现代预应力混凝土结构[M].北京:中国建筑工业出版社,2005.
[7]柳炳康,吴胜星.工程结构鉴定与加固[M].北京:中国建筑工业出版社,2000.
[8]张迎霞.体外预应力悬索分载法加固混凝土梁的试验研究与理论分析[D].武汉:武汉理工大学,2005.