朔黄重载铁路子牙新河特大桥技术状态评估
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摘要
为了评估重载铁路桥梁的技术状态,对朔黄铁路子牙新河特大桥进行了动力试验。利用冲击振动试验法识别桥墩横向自振频率以及梁体横向和竖向自振频率。动力试验中,通过测试运营列车作用下梁体控制截面的梁体振幅和加速度的响应,并将突测结果与《铁路桥梁检定规范》规定的限值比较。结果表明,梁体各项动力参数指标均满足规范要求,这说明梁体结构的运营性能良好。该桥部分桥墩之前进行过加固,为了评估加固前和加固后桥墩结构的动力性能,试验选取典型桥墩进行动力测试分析。比较加固前后桥墩振动参数的变化情况。评估结论可验证桥墩加固效果,为其余桥墩是否需要加固提供数据支持。
In order to estimate the technical status of heavy load railway bridge,Ziyaxin River Bridge in Shuohuang Heavy Load Railway is dynamically tested.The impact vibration test method is used to distinguish the transverse natural vibration frequency of bridge pier,and the transverse and vertical natural vibration frequencies of girder.In the dynamic test,the measured result is compared with the limit value stipulated in Railway Bridge Inspection Specifications by the test of the girder amplitude of girder control section and the response of acceleration under the operation action of train.The result shows that various dynamic parameter indexes of girder all satisfy the requirements of the specification,and illustrates the good operation function of girder structure.The partial piers of this bridge have been reinforced.In order to estimate the dynamic performance of pier structure before and after reinforced,the typical pier is selected to carry out the dynamic test analysis in the test The change conditions of pier vibration parameters before and after reinforced are compared.The estimation conclusion can validate the pier reinforcement effect,which can provide the data support for whether or not to reinforce the rest piers.
In order to estimate the technical status of heavy load railway bridge,Ziyaxin River Bridge in Shuohuang Heavy Load Railway is dynamically tested.The impact vibration test method is used to distinguish the transverse natural vibration frequency of bridge pier,and the transverse and vertical natural vibration frequencies of girder.In the dynamic test,the measured result is compared with the limit value stipulated in Railway Bridge Inspection Specifications by the test of the girder amplitude of girder control section and the response of acceleration under the operation action of train.The result shows that various dynamic parameter indexes of girder all satisfy the requirements of the specification,and illustrates the good operation function of girder structure.The partial piers of this bridge have been reinforced.In order to estimate the dynamic performance of pier structure before and after reinforced,the typical pier is selected to carry out the dynamic test analysis in the test The change conditions of pier vibration parameters before and after reinforced are compared.The estimation conclusion can validate the pier reinforcement effect,which can provide the data support for whether or not to reinforce the rest piers.
引文
[1]战家旺.既有铁路桥墩健全度评估和试验方法研究[D].北京:北京交通大学,2006.
[2]李旻,罗兴华.重载铁路桥梁横向振动检测及加固研究[J].神华科技,2013,11(5):80-83.
[3]周海林,王星华.桥墩病害动力测试分析[J].中国铁道科学,2001,22(5):128-1 32
[4]铁运函[2004]120号,铁路桥梁检定规范[S].
[5]刘汉夫,张煅.铁路桥梁自振频率测试与分析方法的探讨[J].铁道标准设计,2005(12):41-44.
[6]战家旺,夏禾.既有桥梁墩台自振频率测试的冲击振动试验法[J].北京交通大学学报,2005,29(1):14-1 7.
[7]高怀志,王君杰.桥梁检测和状态评估研究与应用[J].世界地震工程,2000,1 6(2):57-64.
[2]李旻,罗兴华.重载铁路桥梁横向振动检测及加固研究[J].神华科技,2013,11(5):80-83.
[3]周海林,王星华.桥墩病害动力测试分析[J].中国铁道科学,2001,22(5):128-1 32
[4]铁运函[2004]120号,铁路桥梁检定规范[S].
[5]刘汉夫,张煅.铁路桥梁自振频率测试与分析方法的探讨[J].铁道标准设计,2005(12):41-44.
[6]战家旺,夏禾.既有桥梁墩台自振频率测试的冲击振动试验法[J].北京交通大学学报,2005,29(1):14-1 7.
[7]高怀志,王君杰.桥梁检测和状态评估研究与应用[J].世界地震工程,2000,1 6(2):57-64.
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