简支梁桥的振动测试与动力特性分析
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摘要
以某座钢筋混凝土梁桥为例,在简要介绍该桥梁概况及桥梁振动测试试验过程的基础上,结合试验结果建立了符合测试桥梁当前状态的有限元模型,通过测试桥梁实测结果和有限元模拟计算结果的比较,较为详细地分析了该钢筋混凝土梁桥的动力特性。结果表明:桥梁实测、计算频率和振型基本吻合;建立合适有限元模型可作为测试桥梁今后的动力特性变化的参考,对桥梁评价和养护有一定的指导意义。
Taking a reinforced concrete beam bridge as an example,based on a brief introduction of the bridge profile and the bridge vibration test test process,a finite element model conforming to the current state of the test bridge is established based on the test results. The dynamic characteristics of the reinforced concrete beam bridge are analyzed in detail by comparing the tested results with the simulated results. The results show that the tested and calculated frequencies and vibration modes of the bridge are basically consistent,and the establishment of a suitable finite element model can be used as a reference for the future dynamic characteristics of the bridge,which has a certain guiding significance for evaluation and maintenance of the bridge.
Taking a reinforced concrete beam bridge as an example,based on a brief introduction of the bridge profile and the bridge vibration test test process,a finite element model conforming to the current state of the test bridge is established based on the test results. The dynamic characteristics of the reinforced concrete beam bridge are analyzed in detail by comparing the tested results with the simulated results. The results show that the tested and calculated frequencies and vibration modes of the bridge are basically consistent,and the establishment of a suitable finite element model can be used as a reference for the future dynamic characteristics of the bridge,which has a certain guiding significance for evaluation and maintenance of the bridge.
引文
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[2]夏立鹏,郑愚.现有桥面板加固方法综述[J].东莞理工学院学报,2016(1):80-89.
[3]田桂涛.普通钢筋砼桥梁结构应力测评方法的探讨与研究[D].重庆:重庆交通大学,2011.
[4]王黎园.某多跨预应力连续梁桥检测与现状评估[J].辽宁省交通高等专科学校学报,2011(1):1-4.
[5]夏樟华.基于静动力的桥梁结构有限元模型修正[D].福州:福州大学,2005.
[6]阮毅.既有混凝土独塔斜拉桥承载力评估[D].福州:福州大学,2013.
[7]王忠.基于振动测试的简支T梁桥桥面改造效果评估[J].福建建设科技,2009(5):56-58.
[8]叶琳.拓宽混凝土拱桥动力特性分析[J].城市道桥与防洪,2013(3):75-78+81+214.
[9]李清,宁灿程,于雪莉.上承式铁路混凝土拱桥加固技术研究[J].河南城建学院学报,2010(2):10-12+61.
[10]王峻高.增大截面加固钢筋混凝土T梁桥工作性能的动力评价方法[J].福建交通科技,2012(2):57-61.
[11]柯重基.洪濑旧桥粘钢加固静动力特性分析[J].公路交通科技(应用技术版),2011(6):26-30+38.