基于倾角仪测试铁路桥梁静态挠度
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摘要
桥梁挠度测量是桥梁检测的重要组成部分和安全性评价的一项重要指标。随着铁路桥梁设计跨度逐步增大、桥梁主跨下面为江流等因素,传统的静态挠度测试法如水准仪等不再适合测试大跨度桥梁的静态挠度,该文利用QY倾角仪测量了焦柳铁路线上的融水大桥第3跨的静态挠度。测试结果表明:倾角仪测得的静态挠度值与水准仪测得值相差较小,其挠度曲线也相似于有限元分析所得挠度曲线,可适用于大跨度铁路桥梁的静态挠度测试。
The bridge deflection measurement is an important component for the bridge examination and an important target for the security evaluation.As the span of railway bridge designed is longer than before and there are always water under the bridge,the traditional way of static deflection measurement,such as level gauge,can't be used to measure the static deflection of large bridge.The static deflections of Rongshui Bridge at Jiaoliu railway are measured with QY inclinometer.The test results indicate that the static deflection measurement results of QY inclinometer is very close to those of the level gauge,and its deflection curve is also similar with that obtained by the finite element analysis.And the result shows the QY inclinometer can satisfy the deflection test requests of large-scale railroad bridges.
The bridge deflection measurement is an important component for the bridge examination and an important target for the security evaluation.As the span of railway bridge designed is longer than before and there are always water under the bridge,the traditional way of static deflection measurement,such as level gauge,can't be used to measure the static deflection of large bridge.The static deflections of Rongshui Bridge at Jiaoliu railway are measured with QY inclinometer.The test results indicate that the static deflection measurement results of QY inclinometer is very close to those of the level gauge,and its deflection curve is also similar with that obtained by the finite element analysis.And the result shows the QY inclinometer can satisfy the deflection test requests of large-scale railroad bridges.
引文
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[2]杨学山,侯兴民.桥梁挠度测试的一种新方法[J].土木工程学报,2002,35(2):92-96.
[3]杨学山,马树林.QY型倾角仪瞬态反映测试方法的研究[J].地震工程与工程振动,2002,22(2):97-100.
[4]侯兴民,杨学山.陶赖昭松花江大桥挠度测量分析[J].地震工程与工程振动,2003,23(2):77-80.
[5]王济,胡晓.Matlab在振动信号处理中的应用[M].北京:中国水利水电出版社,2005.
[6]杨乐平,李海涛.LabVIEW高级程序设计[M].北京:清华大学出版社,2002.
[7]杨学山.工程振动测量仪器和测试技术[M].北京:中国计量出版社,1999.
[8]李天昀.两种快速局部傅里叶变换的研究[J].系统工程与电子技术,2004,17(1):7-15.
[9]应怀樵.波形和频谱分析与随机数据处理[M].北京:中国铁道出版社,1985.
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