不同地震烈度下隔震连续梁桥模型振动台试验
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摘要
为了研究在不同地震烈度下不同类型场地的隔震连续梁桥结构的振动特性和隔震效果,根据一座在建的两跨隔震梁桥,按1/10的比例设计了一座两跨隔震梁桥模型及试验用方形铅芯橡胶支座,并对其力学性能进行试验;在此基础上对梁桥结构模型进行了地震模拟振动台试验。结果表明:地震动的幅度和频谱成分、场地类别、地震烈度、断层等因素对隔震桥梁体系的隔震效果有很大影响;输入不同地震波和不同加速度峰值,小震时铅芯橡胶支座水平刚度较大,结构较稳定,大震时铅芯橡胶支座水平刚度较小,支座恢复力-位移滞回曲线面积较大,可以较多地耗散地震输入能量,减小能量向桥梁上部结构的传递。
In order to investigate different types of fields of the vibration properties and isolated effect of isolated continuous girder bridges under different earthquake intensity excitations,a 1/10 isolated bridge model consisting of two-span continuous deck and square lead rubber bearing(LRB) using in test were designed and mechanical characteristics of LRB were tested.Based on it,simulated shaking table test was carried out.Results show that the amplitude and ingredient of frequency spectra,site sort,earthquake intensity and fault layer have important influence on isolated effect of isolated bridges.Under different peak seismic waves and peak accelerations,the isolated bridge structure is stable because horizontal stiffness of LRB is great under minor earthquake input.Much earthquake energy is dissipated and energy transmitted to the upper part of bridge can be reduced due to areas of displacement hysteretic curves of bearing restoring force is big and horizontal stiffness of LRB is small under large earthquake input.
In order to investigate different types of fields of the vibration properties and isolated effect of isolated continuous girder bridges under different earthquake intensity excitations,a 1/10 isolated bridge model consisting of two-span continuous deck and square lead rubber bearing(LRB) using in test were designed and mechanical characteristics of LRB were tested.Based on it,simulated shaking table test was carried out.Results show that the amplitude and ingredient of frequency spectra,site sort,earthquake intensity and fault layer have important influence on isolated effect of isolated bridges.Under different peak seismic waves and peak accelerations,the isolated bridge structure is stable because horizontal stiffness of LRB is great under minor earthquake input.Much earthquake energy is dissipated and energy transmitted to the upper part of bridge can be reduced due to areas of displacement hysteretic curves of bearing restoring force is big and horizontal stiffness of LRB is small under large earthquake input.
引文
[1]日本建筑学会.隔震结构设计[M].刘文光,译.北京:地震出版社,2006.Architectural Institute of Japan.Recommendation forthe Design of Base Isolated Buildings[M].Translatedby LIU Wen-guang.Beijing:Earthquake Press,2006.
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[4]TSOPELAS P,CONSTANTINOU M C,KIM Y S,et al.Experimental Study of FPS System in BridgeSeismic Isolation[J].Earthquake Engineering&Structural Dynamics,1996,25(1):65-76.
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[10]周勇军,彭晓彬,赵煜,等.简支梁桥顺桥向地震动分析[J].交通运输工程学报,2007,7(6):86-89.ZHOU Yong-jun,PENG Xiao-bin,ZHAO Yu,et al.Analysis of Longitudinal Seismic Vibration for Simp-ly-supported Beam Bridge[J].Journal of Traffic andTransportation Engineering,2007,7(6):86-89.
[11]王锁军,王元清,吴杰,等.组合梁刚度对组合框架的抗震性能影响分析[J].建筑科学与工程学报,2006,23(1):39-44.WANG Suo-jun,WANG Yuan-qing,WU Jie,et al.Analysis of Composite Beam Rigidity InfluencingSeismic Properties of Composite Frame[J].Journal ofArchitecture and Civil Engineering,2006,23(1):39-44.
[12]周勇军,赵小星,宋一凡,等.连续梁桥模态分析与试验[J].长安大学学报:自然科学版,2007,27(3):57-60.ZHOU Yong-jun,ZHAO Xiao-xing,SONG Yi-fan,et al.Modal Analysis and Experiment Test ofContinuous Beam Bridge[J].Journal of Chang anUniversity:Natural Science Edition,2007,27(3):57-60.
[13]邰扣霞,丁大钧.中国桥梁建设新飞跃[J].建筑科学与工程学报,2006,23(2):30-40.TAI Kou-xia,DING Da-jun.New Leaps in Construc-tion of Bridges in China[J].Journal of Architectureand Civil Engineering,2006,23(2):30-40.
[14]陈水生,万益春,野田尚昭.隔震桥梁地震响应非线性分析[J].长安大学学报:自然科学版,2006,26(1):54-58.CHEN Shui-sheng,WAN Yi-chun,NODA N.Nonlin-ear Response of Isolated-bridge Subjected to SeismicExcitation[J].Journal of Chang an University:Nat-ural Science Edition,2006,26(1):54-58.
[15]薛晓锋,胡兆同,刘健新.功能分离式桥梁减震支座[J].长安大学学报:自然科学版,2005,25(1):33-36.XUE Xiao-feng,HU Zhao-tong,LIU Jian-xin.Inte-grated Isolation Bearing of Bridge[J].Journal ofChang an University:Natural Science Edition,2005,25(1):33-36.
[16]孙汝蛟,刘健新,胡兆同.高阻尼橡胶剪切型拉索减振器[J].长安大学学报:自然科学版,2005,25(1):37-40.SUN Ru-jiao,LIU Jian-xin,HU Zhao-tong.ShearingDampers on Stay Cables with High-damping Rubber[J].Journal of Chang an University:Natural ScienceEdition,2005,25(1):37-40.
[17]韩强,杜修力,刘文光,等.橡胶隔震支座拉伸性能试验研究[J].北京工业大学学报,2006,32(3):208-212.HAN Qiang,DU Xiu-li,LIU Wen-guang,et al.Ex-periment Study on Tensile Properties of LRB[J].Journal of Beijing University of Technology,2006,32(3):208-212.
[2]KELLY J M.Earthquake Resistant Design with Rub-ber[M].2nd ed.London:Springer,1996.
[3]CONSTANTINOU M C,KARTOUM A,REIHORNA M,et al.Sliding Isolation System for Bridges:Ex-perimental Study[J].Earthquake Spectra,1992,8(3):321-344.
[4]TSOPELAS P,CONSTANTINOU M C,KIM Y S,et al.Experimental Study of FPS System in BridgeSeismic Isolation[J].Earthquake Engineering&Structural Dynamics,1996,25(1):65-76.
[5]TSOPELAS P,CONSTANTINOU M C,OKAMOTOS,et al.Experimental Study of Bridge Seismic SlidingIsolation Systems[J].Engineering Structures,1996,18(4):301-310.
[6]范立础,袁万城.桥梁橡胶支座减、隔震性能研究[J].同济大学学报,1989,17(4):447-455.FAN Li-chu,YUAN Wan-cheng.Study on BridgeRubber Bearings[J].Journal of Tongji University,1989,17(4):447-455.
[7]张俊平,周福霖,廖蜀樵.桥梁隔震体系振动台试验研究(Ⅰ)———试验意义与模型设计[J].地震工程与工程振动,2001,21(4):128-134.ZHANG Jun-ping,ZHOU Fu-lin,LIAO Shu-qiao.Ex-perimental Study on Isolated Bridge System(Ⅰ)-Test Significance and Model Design[J].EarthquakeEngineering and Engineering Vibration,2001,21(4):128-134.
[8]张俊平,周福霖,闫维明,等.桥梁隔震体系振动台试验研究(Ⅱ)———主要测试结果介绍[J].地震工程与工程振动,2002,22(1):101-108.ZHANG Jun-ping,ZHOU Fu-lin,YAN Wei-ming,et al.Experimental Study on Isolated Bridge System(Ⅱ)-An Introduction to Main Measured Results[J].Earthquake Engineering and Engineering Vibra-tion,2002,22(1):101-108.
[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 Jia-wu,LU Bin,LIU Jian-xin.Shake Table Experi-mental Study of the Seism-reduced Behavior of Con-tinuous-beam Bridges[J].Bridge Construction,2002(6):20-22.
[10]周勇军,彭晓彬,赵煜,等.简支梁桥顺桥向地震动分析[J].交通运输工程学报,2007,7(6):86-89.ZHOU Yong-jun,PENG Xiao-bin,ZHAO Yu,et al.Analysis of Longitudinal Seismic Vibration for Simp-ly-supported Beam Bridge[J].Journal of Traffic andTransportation Engineering,2007,7(6):86-89.
[11]王锁军,王元清,吴杰,等.组合梁刚度对组合框架的抗震性能影响分析[J].建筑科学与工程学报,2006,23(1):39-44.WANG Suo-jun,WANG Yuan-qing,WU Jie,et al.Analysis of Composite Beam Rigidity InfluencingSeismic Properties of Composite Frame[J].Journal ofArchitecture and Civil Engineering,2006,23(1):39-44.
[12]周勇军,赵小星,宋一凡,等.连续梁桥模态分析与试验[J].长安大学学报:自然科学版,2007,27(3):57-60.ZHOU Yong-jun,ZHAO Xiao-xing,SONG Yi-fan,et al.Modal Analysis and Experiment Test ofContinuous Beam Bridge[J].Journal of Chang anUniversity:Natural Science Edition,2007,27(3):57-60.
[13]邰扣霞,丁大钧.中国桥梁建设新飞跃[J].建筑科学与工程学报,2006,23(2):30-40.TAI Kou-xia,DING Da-jun.New Leaps in Construc-tion of Bridges in China[J].Journal of Architectureand Civil Engineering,2006,23(2):30-40.
[14]陈水生,万益春,野田尚昭.隔震桥梁地震响应非线性分析[J].长安大学学报:自然科学版,2006,26(1):54-58.CHEN Shui-sheng,WAN Yi-chun,NODA N.Nonlin-ear Response of Isolated-bridge Subjected to SeismicExcitation[J].Journal of Chang an University:Nat-ural Science Edition,2006,26(1):54-58.
[15]薛晓锋,胡兆同,刘健新.功能分离式桥梁减震支座[J].长安大学学报:自然科学版,2005,25(1):33-36.XUE Xiao-feng,HU Zhao-tong,LIU Jian-xin.Inte-grated Isolation Bearing of Bridge[J].Journal ofChang an University:Natural Science Edition,2005,25(1):33-36.
[16]孙汝蛟,刘健新,胡兆同.高阻尼橡胶剪切型拉索减振器[J].长安大学学报:自然科学版,2005,25(1):37-40.SUN Ru-jiao,LIU Jian-xin,HU Zhao-tong.ShearingDampers on Stay Cables with High-damping Rubber[J].Journal of Chang an University:Natural ScienceEdition,2005,25(1):37-40.
[17]韩强,杜修力,刘文光,等.橡胶隔震支座拉伸性能试验研究[J].北京工业大学学报,2006,32(3):208-212.HAN Qiang,DU Xiu-li,LIU Wen-guang,et al.Ex-periment Study on Tensile Properties of LRB[J].Journal of Beijing University of Technology,2006,32(3):208-212.
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