液体黏滞阻尼器在大跨度桥梁中对伸缩缝保护作用的探讨
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摘要
为了限制动荷载作用下梁端的位移,经常要在梁端安装阻尼器,与伸缩缝在结构上形成并联装置。当桥面突然发生大规模的刹车,或在突加的地震、风荷载等荷载的冲击作用下,阻尼器是否会对伸缩缝起到保护作用就成为一个令人关心的问题。由一般多自由度体系动力方程出发,通过矩阵变换得到结构局部关于阻尼器单自由度方程。基于此单自由度方程,对阻尼器在结构中具有局部减震效果提出了理论上的论证,在此基础上就阻尼器在各种冲击荷载作用下对伸缩缝的保护作用进行了探讨。
Fluid viscous damper is usually selected to be equipped at the ends of beam to restrict their displacements.Under this condition,fluid viscous dampers and expansion joint are usually parallel in structure.The question is whether the damper have the protecting function for expansion joint under the impact force caused by earthquake,wind and vehicle etc.From multi-degree-of-fredom equation,a local single-degree-of-freedom equation of damper is obtained by matrix transform,and on the basis of it,the effects of decreasing local vibration is put forward in theory.Subsequently,The protecting function for expansion joints of damper under the impact forces is investigated.
Fluid viscous damper is usually selected to be equipped at the ends of beam to restrict their displacements.Under this condition,fluid viscous dampers and expansion joint are usually parallel in structure.The question is whether the damper have the protecting function for expansion joint under the impact force caused by earthquake,wind and vehicle etc.From multi-degree-of-fredom equation,a local single-degree-of-freedom equation of damper is obtained by matrix transform,and on the basis of it,the effects of decreasing local vibration is put forward in theory.Subsequently,The protecting function for expansion joints of damper under the impact forces is investigated.
引文
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[2]王凤才,聂荣兴.路桥伸缩缝接合技术的重大改革[J].江南学院学报,2000,15(2):69-71.
[3]金增洪.通向斯堪的纳维亚的桥梁[J].中外公路,2003,l23(6):63-67.
[4]周世忠.中国悬索桥的发展[J].桥梁建设,2003,23(5):30-34.
[5]韩万水,黄平明,兰燕.斜拉桥纵向设置黏滞阻尼器参数分析[J].地震工程与工程振动,2005,l25(6):146-151.
[6]Constantinou M C,Symans M C.Experimental and Analytical Investigation of seismic response of structures with supplemental fluid viscousdampers[R].Buffalo,NY:NCEER Rep.90-0032,State Univ.of New York at Buffalo,1992.
[7]Makris N,Constantinou M C.Viscous damper:testing,modeling and application in vibration of seismic isolation[R].Buffalo,NY:NCEERRep.90-0028,State Univ.of New York at Buffalo,1990.
[8]Reihorn A M,Li C,Constantinou MC.Experimental and analytical investigation of seismic retrofit of structures with supplement damping:PartI:Fluid Viscous Damping Devices[R].Buffalo,NY:NCEER Rep.90-0001,State Univ.of New York at Buffalo,1995.
[9]Niwa Naoki,Kobori Takuji,Takahashi Motoichi,et al.Passive seismic response controlled high-rise building with high damping device[J].Earthquake Engineering&Structural Dynamics,1995,24(5):655-671.
[10]欧进萍,丁建华.油缸间隙式黏滞阻尼器理论与性能试验[J].地震工程与工程振动,1999,19(4):82-89.
[11]翁大根,卢著辉,徐斌,等.黏滞阻尼器力学性能试验研究[J].世界地震工程,2002,18(4):30-34.
[12]范立础.桥梁抗震[M].上海:同济大学出版社,1997.
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