某双曲拱桥承载能力检测与评估

摘要

为确保桥梁结构使用安全需对旧桥进行承载能力评估，根据《公路桥梁承载能力检测评定规程》（J T G／T J21－2011）中的桥梁检测方法及其承载能力评定方法，通过引入承载力恶化系数，截面折减系数和活载影响修正系数修正结构构件的承载能力检算结果，承载能力评定结果更能反映出桥梁的实际状况。以某双曲拱桥为例，根据试验结果进行评定，为同类桥梁提供借鉴和参考。%In order to ensure the safety of the bridge structure ,the carrying capacity of the old bridge is evaluated .According to the bridge detection method and bearing capacity evaluation method in the《Specification for Inspection and Evaluation of Load‐bearing Capacity of Highway Bridges》(JTG/T J21-2011) ,by introducing the deterioration coefficient of bearing capacity ,the reduction coefficient of section and the influence of live load , the load capacity of the structure is calculated . T he result of carrying capacity evaluation can reflect the actual condition of the bridge .Taking a double curved arch bridge as an example ,according to the test results ,it provides reference for similar bridges .