铁路上承式钢板梁桥横向振动抑制方案研究
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摘要
通过对目前抑制铁路上承式钢板梁桥横向振动的几种方案进行定性的分析和比较 ,认为 :静力加固方案可以使桥梁振幅有所减小 ,但不能避免准共振现象的发生 ,而且工程造价较高 ,施工也不方便 ;两桥连接方案减振效果明显 (减振率近 5 0 % ) ,比较经济也比较方便 ,但同样不能避免准共振现象的发生 ;动力减振方案 (MTMD抑振方案 )可以有效的抑制桥梁的准共振现象 (现场试验中减振率达 5 1.83% ) ,而且工程造价较低 ,施工简单、方便
Based on qualitative analysis and comparison of several options for suppressing transverse vibration on deck type steel plate girder of railway bridge, conclusions are made as follows: with static reinforcing, the vibration amplitude can be suppressed to some extent, but quasi resonance of the bridge can not be avoided, moreover, the construction is inconvenient and costly. With option of two bridge connection, the effectiveness of vibration suppression is clear (the damping ratio approaches 50%) and it is fairly economic and easy, however, the quasi resonance of the bridge can not be avoided either. With dynamic option (MTMD option), the quasi resonance of the bridge can be effectively avoided (the damping ratio is up to 51.38% as tested in field), moreover, the construction cost is low, and the construction is simply and convenient.
Based on qualitative analysis and comparison of several options for suppressing transverse vibration on deck type steel plate girder of railway bridge, conclusions are made as follows: with static reinforcing, the vibration amplitude can be suppressed to some extent, but quasi resonance of the bridge can not be avoided, moreover, the construction is inconvenient and costly. With option of two bridge connection, the effectiveness of vibration suppression is clear (the damping ratio approaches 50%) and it is fairly economic and easy, however, the quasi resonance of the bridge can not be avoided either. With dynamic option (MTMD option), the quasi resonance of the bridge can be effectively avoided (the damping ratio is up to 51.38% as tested in field), moreover, the construction cost is low, and the construction is simply and convenient.
引文
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[2 ] 郑州铁路局桥检队 .京广线郑州黄河大桥振动试验报告[R] ,郑州 :1997.
[3] 孙训方 .材料力学 (上册 ) [M] ,北京 :人民教育出版社 ,1979.
[4] 苏木标 ,李建中 ,梁志广 .MTMD抑制铁路上承钢板梁桥横向振动试验研究 [J] .振动与冲击 ,2 0 0 0 ,19(1) :19-2 3.
[5 ] 苏木标 ,高 杨 ,李建中 .两桥连接抑制桥梁横向振动研究[J] .地震工程与工程振动 .2 0 0 0 ,2 0 (1) :190 -197.
[6 ] 丁文镜 .减振理论 [M] .北京 :清华大学出版社 ,1988.
[7] 李建中 ,苏木标 ,杨益谦 .TMD抑制既有钢桥提速时发生振动的研究 [J] .铁道学报 ,1999,2 1(1) :81-85
[2 ] 郑州铁路局桥检队 .京广线郑州黄河大桥振动试验报告[R] ,郑州 :1997.
[3] 孙训方 .材料力学 (上册 ) [M] ,北京 :人民教育出版社 ,1979.
[4] 苏木标 ,李建中 ,梁志广 .MTMD抑制铁路上承钢板梁桥横向振动试验研究 [J] .振动与冲击 ,2 0 0 0 ,19(1) :19-2 3.
[5 ] 苏木标 ,高 杨 ,李建中 .两桥连接抑制桥梁横向振动研究[J] .地震工程与工程振动 .2 0 0 0 ,2 0 (1) :190 -197.
[6 ] 丁文镜 .减振理论 [M] .北京 :清华大学出版社 ,1988.
[7] 李建中 ,苏木标 ,杨益谦 .TMD抑制既有钢桥提速时发生振动的研究 [J] .铁道学报 ,1999,2 1(1) :81-85
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