采用碳纤维布加固的在役小箱梁承载力效果分析  

Bearing Capacity Analysis of in-Service Small Box Girder Reinforced with Carbon Fiber Sheet

作　　者：周泠琪 董军 刘晓晨 肖英楠 ZHOU Ling-qi;DONG Jun;LIU Xiao-chen;XIAO Ying-nan(School of Civil and Transportation Engineering of Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Texida Transportation Facilities Consultants Co.Ltd.,Beijing 100067,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]北京特希达交通勘察设计院有限公司,北京100067

出　　处：《工程建设与设计》2024年第20期50-54,共5页Construction & Design for Engineering

摘　　要：基于某特大桥中的预制小箱梁段的典型病害,使用有限元软件进行了正截面、斜截面、极限承载力等验算,并提出不同维修加固方法的比选,得出对结构损伤小,施工工期短,且承载力提升多的方案。对加固后桥梁的承载力提升进行有限元模拟验算可知,加固后,小箱梁外边梁边跨跨中及中跨跨中截面、正截面抗弯承载能力提高约6%,满足正常使用要求。Based on the typical diseases of prefabricated small box girder section in a large bridge,the normal section,oblique section and ultimate bearing capacity are checked by finite element software,and the comparison and selection of different maintenance and reinforcement methods are put forward,and the scheme with lttle damage to the structure,short construction period and more capacity improvement is obtained.The fnite element simulation of the reinforced bridge shows that the bending bearing capacity of the small box girder is increased by about 6%in the middle span of the outer beam side and the middle section of the middle span and the normal section,which meets the requirements of normal use.

关 键 词：碳纤维板加固 小箱梁 桥梁工程 维修与加固 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]