钢筋混凝土桁架拱桥钢箱加固及效果评定  

Steel box reinforcement and effect evaluation of reinforced concrete truss arch bridge

作　　者：刘学术 LIU Xueshu(Gansu Transportation Planning Survey and Design Institute Co.,Ltd.,Lanzhou 730030,China)

机构地区：[1]甘肃省交通规划勘察设计院股份有限公司,甘肃兰州730030

出　　处：《中国高新科技》2021年第18期150-151,共2页

摘　　要：某桁架拱桥因上游突发泥石流灾害而大面积严重损坏,在恢复重建期通过对该桥外观评定和荷载试验,发现其多处构件破损严重、整体性差、承载能力不足,结合病害对该桥采取了以拱肋钢箱加固为主的综合加固措施以改善其使用性能。加固完成后分别采用技术状况和荷载试验对该桥的承载能力及加固效果进行评定。结果表明,加固后的桥梁承载能力有较大幅的提高,加固后桥梁能满足设计荷载的承载要求且有一定安全储备,表明该方法对同类桥梁或类似结构的加固具有一定应用价值。A truss arch bridge was severely damaged due to a large-scale debris flow disaster in the upstream.During the restoration and reconstruction period,the appearance evaluation and load test of the bridge were performed.It was found that many of its components were severely damaged,poor integrity,and insufficient load-bearing capacity.Comprehensive reinforcement measures mainly focused on the reinforcement of the arch rib steel box are used to improve its performance.After the completion of the reinforcement,technical conditions and load tests were used to evaluate the bearing capacity and reinforcement effect of the bridge.The results show that the bearing capacity of the reinforced bridge has been greatly improved.After the reinforcement,the bridge can meet the bearing requirements of the design load and has a certain degree.The safety reserve indicates that the method has certain application value for the reinforcement of similar bridges or similar structures.

关 键 词：桁架拱桥 钢箱加固 荷载试验 承载能力 

分 类 号：U44[建筑科学—桥梁与隧道工程]