期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：242
期号：6
页码：1-6
DOI：10.1088/1755-1315/242/6/062059
出版社：IOP Publishing
摘要：Taking a prestressed concrete box girder bridge as the research object, this paper analysis the causes of transverse cracks in the middle span of small box girder and adopts external prestressed bars for reinforcement. Two years of monitoring data showed that the strengthening effect was good, which accumulated experience for the treatment of similar bridge structures.
