体外索加固预应力混凝土连续箱梁裂缝效果研究  

Study on the effect of external cable reinforcement on cracks in prestressed concrete continuous box girders

作　　者：陈光垕 CHEN Guanghou

机构地区：[1]三明市城市建设发展集团有限公司,福建三明365000

出　　处：《福建建设科技》2025年第2期69-72,共4页Fujian Construction Science & Technology

摘　　要：以某预应力混凝土连续箱梁桥体外索加固施工为工程背景,在施工过程中,对其进行全过程监测,掌握桥梁线形及关键截面内力的变化规律,通过理论模型仿真数值对比分析,加固完工后通过再次梁体检测,综合评定其施工加固效果,结果表明该预应力体外索加固施工方法达到既定过程及最终设计预期。相关加固监测分析方法对类似桥梁的加固可提供理论数据和经验。Taking the external cable reinforcement construction of a prestressed concrete continuous box girder bridge as the engineering background,during the construction process,the whole process is monitored to grasp the variation law of the bridge s alignment and the internal force of key sections.Through the comparative analysis of theoretical model simulation numerical values,and the girder testing after reinforcement construction,the construction reinforcement effect is comprehensively evaluated.The results show that the prestressed external cable reinforcement construction method meets the established requirements.Relevant reinforcement monitoring and analysis methods can provide theoretical data and experience for the reinforcement of similar bridges.

关 键 词：体外索加固 连续箱梁 加固监测 有限元计算 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]