连续梁桥纵向减震性能振动台试验与理论分析
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摘要
近几十年的地震灾害中,连续梁桥结构破坏较为严重。桥梁消能减震设计作为一种先进的抗震设计方法,在理论上可有效减轻连续梁桥在地震作用下的破坏,但目前尚缺乏足够的强震或试验验证。因此,为研究连续梁桥在纵向设置黏滞阻尼器后的结构地震响应和减震效果,以青岛海湾大桥50m跨引桥为工程背景,制作完成了3跨连续梁桥(1个固定墩、3个自由墩)的1/20缩尺比例模型,进行常规设计桥梁和在自由墩顶和桥面主梁之间增置阻尼器桥梁的振动台对比试验。通过输入青岛人工地震波,从7个方面详细阐述设置黏滞阻尼器后,连续梁桥在不同地震烈度下纵向减震效果,并且对试验结果进行理论分析,验证试验正确性,为工程实践及科学研究奠定基础。
In recent decades,continuous-beam bridges suffered serious damages in earthquake disasters.The bridge energy-dissipation and earthquake-resistance technology is an advanced vibration reduction technology.It is proved in theory that this technology can effectively mitigate the damage during earthquakes.But tests or evidences in large earthquakes are still needed.Therefore in order to study the earthquake response and seismic-reduced effect of continuous-beam bridges with longitudinal viscous dampers,with the Qingdao Gulf Bridge as the background,a 1/ 20 scale model of three-span continuous-beam bridge(one fixed pier and three free piers) was designed and studied under shaking table test,in which three viscous dampers were installed between the tops of free piers and the girder in the longitudinal direction.Using the Qingdao artificial seismic waves as the input,seven aspects of seismic-reduction effect were elaborated regarding the continuous-beam bridge with longitudinal viscous dampers under the different seismic intensities,and the test results were analyzed theoretically.
In recent decades,continuous-beam bridges suffered serious damages in earthquake disasters.The bridge energy-dissipation and earthquake-resistance technology is an advanced vibration reduction technology.It is proved in theory that this technology can effectively mitigate the damage during earthquakes.But tests or evidences in large earthquakes are still needed.Therefore in order to study the earthquake response and seismic-reduced effect of continuous-beam bridges with longitudinal viscous dampers,with the Qingdao Gulf Bridge as the background,a 1/ 20 scale model of three-span continuous-beam bridge(one fixed pier and three free piers) was designed and studied under shaking table test,in which three viscous dampers were installed between the tops of free piers and the girder in the longitudinal direction.Using the Qingdao artificial seismic waves as the input,seven aspects of seismic-reduction effect were elaborated regarding the continuous-beam bridge with longitudinal viscous dampers under the different seismic intensities,and the test results were analyzed theoretically.
引文
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[2]范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001
[3]王曙光,刘伟庆,徐秀丽,等.大跨连续梁桥纵向消能减震振动台模型试验[J].中国公路学报,2009,22(5):54-59(Wang Shuguang,Liu Weiqing,Xu Xiuli,et al.Shaking table model test of long-span continuous girderbridge with longitudinal seismic energy dissipating[J].China Journal of Highway and Transport,2009,22(5):54-59(in Chinese))
[4]周颖,卢文胜,吕西林.模拟地震振动台模型实用设计方法[J].结构工程师,2003(3):30-33(Zhou Ying,LuWensheng,Lu Xilin.Practical model design method ofshaking table tests[J].Structural Engineers,2003(3):30-33(in Chinese))
[5]钟栋青,王曙光,刘伟庆.在振动台模型试验中黏滞阻尼器的设计方法[J].地震工程与工程振动,2011,31(6):191-195(Zhong Dongqing,Wang Shuguang,LiuWeiqing.Design method of viscous dampers in shakingtable model test[J].Earthquake Engineering andEngineering Vibration,2011,31(6):191-195(inChinese))
[6]蒋通,贺磊.非线性黏滞阻尼器消能结构减振效果分析[J].世界地震工程,2005,21(2):57-63(Jiang Tong,He Lei.Analysis of vibration reduction effects for energy dissipation structures with non-linear viscous dampers[J].World Earthquake Engineering,2005,21(2):57-63(in Chinese))
[7]吴斌,张纪刚,欧进萍.三种阻尼减振结构抗震性能的对比分析[J].世界地震工程,2004,20(1):75-81(Wu Bin,Zhang Jigang,Ou Jinping.The analysis and comparison of seismic performance of structures with three types of dampers[J].World Earthquake Engineering,2004,20(1):75-81(in Chinese))
[8]周福霖.工程结构减震控制[M].北京:地震出版社,1997
[9]李加武,卢斌,刘健新.连续梁减震性能的振动台试验研究[J].桥梁建设,2002(6):20-22(Li Jiawu,Lu Bin,Liu Jianxin.Shake table experimental study of the seismic-reduced behavior of continuous-beam bridges[J].Bridge Construction,2002(6):20-22(in Chinese))
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