超高阻尼隔震橡胶支座的频率相关性试验研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
研究各种因素对高G值超高阻尼隔震橡胶支座(简称SHDR)水平力学性能频率相关性的影响。采用反复加载的试验方法,研究G值大于等于0.8MPa的SHDR支座在不同水平应变、不同竖向压力、不同温度、不同内部橡胶G值(0.8MPa,1.0MPa及1.2MPa)以及不同加载顺序情况下的水平性能频率相关性。分析上述各种因素对高G值SHDR支座的等效刚度及等效阻尼比频率相关性的影响程度,给出除温度外综合考虑上述各种因素后的拟合经验公式。研究表明,竖向压力、水平应变、支座内部橡胶G值和频率加载顺序对其影响较小,而温度对其有较大程度的影响。总体上讲,支座在常温下的等效刚度整体随加载频率的增加而呈非线性增加,而等效阻尼比随频率的增加而呈非线性减小。
The intention of this paper is to study various factors which affect the frequency dependency of horizontal mechanical property of Supper High Damping Rubber Bearing(SHDR) with high shear modulus. The cyclic loading experiment method was adopted to study the effect of shear strain, vertical pressure, temperature, shear modulus of inner rubber of isolator and sequence of loading on the frequency dependency of horizontal mechanical property of SHDR with greater than 0.8MPa shear modulus. The degree of effect on the equivalent stiffness and equivalent damping ratio of SHDR about them was analyzed, some fitted formulas were given, in which all kinds of factors were considered except temperature. Research results show that the effect of vertical pressure, horizontal strain, shear modulus of inner rubber of bearing and sequence of loading on the frequency dependency of SHDR are small, temperature has a certain degree effect on them. As a whole, the equivalent stiffness of SHDR increases nonlinearly with the increase of frequency of loading, the equivalent damping ratio decreases nonlinearly with the increase of frequency.
引文
[1]吴彬,庄军生.铅芯橡胶支座力学性能及其在桥梁工程中减、隔震应用研究[J].中国铁道科学,2004,25(4):138-140(Wu Bin,Zhuang Junsheng.Study on mechanical characteristics of lead-rubber bea ring and its application for shock reduction/isotion in bridge engineering[J].China Railway Science,2004,25(4):138-140(in Chinese))
    [2]李建中,袁万城,范立础.连续梁桥减、隔震体系的优化设计[J].土木工程学报,1998,31(3):47-54(Li Jianzhong,Yuan Wancheng,Fan Lichu.Optimal design of seismic isolation system for continuous bridge[J].China Civil Engineering Journal,1998,31(3):47-54(in Chinese))
    [3]Hwang J S,Chiou J M,Sheng L H,et al.A refined model for base-isolated bridges with bi-linear hysteretic bearings[J].Earthquake Spectra,1996,12(2):245-273
    [4]Ghobarah A,Ali H M.Seismic performance of highway bridges[J].Engineering Structures,1988,10(3):157-166
    [5]Pagnini L C,Solari G.Stochastic analysis of the linear equivalent response of bridge piers with aseismic devices[J].Earthquake Engineering&Structural Dynamics,1999,28(5):543-560
    [6]Huang W H,Fenves G L,Whittaker A S,et al.Characterization of seismic isolation bearings for bridges from bi-directional testing[C]//Proceedings of the 12th World Conference on Earthquake Engineering.Upper Hutt,New Zealand:New Zealand Society for Earthquake Engineering,2000:2047-2048
    [7]叶明坤,资道铭,梁莹莹,等.超高阻尼隔震橡胶支座在桥梁中的应用[J].中国建筑金属结构,2013,(2):112-114
    [8]资道铭,梁莹莹,袁涌,等.几种隔震橡胶支座性能研究及隔震效果探讨[J].预应力技术,2013,(4):18-26
    [9]袁涌,朱宏平,资道铭.高阻尼橡胶隔震支座的力学性能及隔震效果分析研究[J].预应力技术,2011,(1):20-23
    [10]庄学真,沈朝勇,金建敏.桥梁高阻尼橡胶支座力学性能试验研究[J].地震工程与工程振动.2006,26(5):208-212(Zhuang Xuezhen,Shen Chaoyong,Jin Jianmin.Experimental study on mechanical property of high damping rubber bearing for bridge[J].Earthquake Engineering and Engineering Vibration,2006,26(5):208-212(in Chinese)
    [11]GB 20688.2—2006橡胶支座第2部分:桥梁隔震橡胶支座[S].北京:中国标准出版社,2006(GB 20688.2—2006Rubber bearings—Part 2:Elastomeric seismic-protection isolators for bridges[S].Beijing:Standards Press of China,2006(in Chinese))
    [12]JT/T 842—2012公路桥梁高阻尼隔震橡胶支座[S].北京:人民交通出版社,2012(JT/T 842—2012 High damping seismic isolation rubber bearings for highway bridges[S].Beijing:China Communications Press,2012(in Chinese))
    [13]JT/T 822—2011公路桥梁铅芯隔震橡胶支座[S].北京:人民交通出版社,2012(JT/T 822—2011 Lead rubber bearing isolator for highway bridge[S].Beijing:China Communications Press,2012(in Chinese))
    [14]GB/T 20688.1—2007橡胶支座第1部分:隔震橡胶支座试验方法[S].北京:中国标准出版社,2007(GB/T 20688.1—2007 Rubber bearings—Part 1:Seismic-protection isolators test methods[S].Beijing:Standards Press of China,2007(in Chinese))

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心