形状记忆合金金属橡胶阻尼器防高墩桥梁地震碰撞振动台试验研究
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摘要
为研究形状记忆合金(shape memory alloy,SMA)金属橡胶减振器防高墩桥梁地震碰撞效能,采用ElCentro、Taft和人造地震动,进行了高墩桥梁钢模型地震碰撞试验和防高墩桥梁钢模型试验(设置SMA金属橡胶阻尼器),详细对比分析了SMA金属橡胶阻尼器控制效能.结果证明,由于SMA金属橡胶具有良好的阻尼性能,且其随变形的增加刚度增大,故SMA金属橡胶阻尼减振器能有效地减轻高墩桥梁地震碰撞效应,起到限位器的作用.
To study the control efficiency of a shape memory alloy(SMA) pseudo-rubber metal(PRM) damper on a seismic pounding of a high-pier bridge,based on El Centro,Taft,and artificial ground motions,seismic pounding shaking testing and seismic pounding shaking table testing of a high-pier bridge steel model are carried out.The control efficiency of an SMA PRM damper is analyzed in detail.Results show that SMA PRM possesses favorable damping behavior,and its stiffness becomes large with increasing distortion.It can effectively mitigate the seismic pounding in high-pier bridges,and play a role in resisting drift between the main and the approach bridges.An SMA PRM damper is adapted to reduce seismic pounding devices and restrictor in high-pier and long span bridges.
To study the control efficiency of a shape memory alloy(SMA) pseudo-rubber metal(PRM) damper on a seismic pounding of a high-pier bridge,based on El Centro,Taft,and artificial ground motions,seismic pounding shaking testing and seismic pounding shaking table testing of a high-pier bridge steel model are carried out.The control efficiency of an SMA PRM damper is analyzed in detail.Results show that SMA PRM possesses favorable damping behavior,and its stiffness becomes large with increasing distortion.It can effectively mitigate the seismic pounding in high-pier bridges,and play a role in resisting drift between the main and the approach bridges.An SMA PRM damper is adapted to reduce seismic pounding devices and restrictor in high-pier and long span bridges.
引文
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[13]RUANGRASSAMEE A,KAWASHIMA K.Control ofnonlinear bridge response with pounding effect by variabledampers[J].Engineering Structures,2003,25(5):593-606.
[2]李忠献,岳福青.城市桥梁地震碰撞反应研究与发展[J].地震工程与工程振动,2005,25(4):91-98.LI Zhong-xian,YUE Fu-qing.State of arts of study onseismic pounding responses of urban bridges[J].Journalof Earthquake Engineering and Engineering Vibration,2005,25(4):91-98.(in Chinese)
[3]杜修力,韩强,李忠献.5.12汶川地震中山区公路桥梁震害及启示[J].北京工业大学学报,2008,34(12):1270-1279.DU Xiu-li,HAN Qiang,LI Zhong-xian.The seimic damgeof bridges in the 2008 Wenchuan earthquake and lessonsfrom its damge[J].Journal of Beijing University ofTechnology,2008,34(12):1270-1279.(in Chinese)
[4]孙治国,王东升,郭迅,等.汶川大地震绵竹市回澜立交桥震害调查[J].地震工程与工程振动,2009,29(4):132-138.SUN Zhi-guo,WANG Dong-sheng,GUO Xun,et al.Damge inverstigation of Huilan interchange in Mianzhuafter Wenchuan earthquake.Journal of EarthquakeEngineering and Engineering Vibration,2009,29(4):132-138.(in Chinese)
[5]孟庆利,阎维明,张敏政,等.形状记忆合金(SMA)金属橡胶阻尼器研制[C]∥中国(北京)国际建筑科技大会论文集.北京:科学出版社,2010.
[6]孟庆利,盛增.相邻结构地震碰撞研究简述[J].世界地震工程,2003,19(4):68-72.MENG Qing-li,SHENG zeng.A simplified review on theseismic pounding of adjacent buildings[J].Journal ofWorld Earthquake Engineering,2003,19(4):68-72.(inChinese)
[7]蒋建军,李建中,范立础.桥梁板式橡胶支座与粘滞阻尼器组合使用的减震性能研究[J].公路交通科技,2005,22(8):44-48.JIANG Jian-jun,LI Jian-zhong,FAN Li-chu.Study onaseismic performance of combination of laminated rubberbearing and viscous damper for bridge.Journal of Highwayand Transportation Research and Development,2005,22(8):44-48.(in Chinese)
[8]ZHU Ping,ABE M,FUJINO Y.Evaluation of poundingcountermeasures and serviceability of elevated bridgesduring seismic excitation using 3D modeling[J].Earthquake Engineering and Structural Dynamics,2004,33(5):591-609.
[9]DESROCHES R,DELEMONT M.Seismic retrofit ofsimply supported bridges using shape memory alloys[J].Engineering Structures,2002,24(3):325-332.
[10]BERTON S,STRANDGAARD H,BOLANDER J E.Effect of non-linear fluid viscous dampers on the size ofexpansion joints of multi-span prestressed concretesegmental box-girder bridges[C]∥Proc of 13th WorldConference on Earthquake Engineering.Vancouver,2004.
[11]FENG M Q,KIM J M,SHINOZUKA M,et al.Viscoelastic dampers at expansion joints for seismicprotection of bridges[J].Journal of Bridge Engineering,2000,15(1):67-74.
[12]KIM J M,FENG M Q,SHINOZUKA M.Energydissipating restrainers for highway bridges[J].SoilDynamics and Earthquake Engineering,2000,19(1):65-69.
[13]RUANGRASSAMEE A,KAWASHIMA K.Control ofnonlinear bridge response with pounding effect by variabledampers[J].Engineering Structures,2003,25(5):593-606.
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