双曲拱桥承载能力验算与静载试验研究

CALCULATION OF LOAD CARRYING CAPACITY AND STATIC LOADING TESTS OF DOUBLE-CURVED ARCH BRIDGE

双曲拱桥因其造价低、载重量大、施工方便等特点在上世纪六七十年代被广泛修建,由于设计标准低、施工质量差、载重超负荷等原因,现已出现不同程度病害,影响桥梁安全运营。文中以晨光大桥检测工程为例,详细介绍承载能力验算及静载试验过程,通过静载试验实测数据与理论数据对比综合分析,得出桥梁安全储备已不能满足安全运营。针对病害及不满足承载力要求部位给出加固建议,为同类型桥梁质量评定提供参考。

The double-curved arch bridge is widely constructed in the 1960s and 1970s featuring low cost,large load capacity,and convenient construction.Due to the low design standard,poor construction quality,and overloading of loads,different degrees of diseases have appeared,affecting the safe operation of the bridge.Taking the testing project of Chenguang Bridge as the case,the process of bearing capacity calculation and static load test is detailed.The measured data of static load test in comparison with the theoretical data is comprehensively analyzed.The results show the safety reserve of the bridge no longer meets the safe operation.Reinforcement recommendations for the same type of bridge quality assessment are proposed for the disasters that do not meet the requirements of the bearing capacity of the parts.