基于SMA复合橡胶支座的桥梁隔震
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摘要
针对结构减震、隔震问题,提出了一种基于SMA复合橡胶支座的智能隔震系统,应用SMA复合橡胶支座对一受代表3种场地频率地震波激励的多跨简支桥的标准跨桥梁进行了时程分析,并与应用普通橡胶支座的桥梁进行了减震、隔震效果的比较．结果表明,应用SMA复合橡胶支座隔震,不仅能取得更为显著的减震、隔震效果,而且能使地震后隔震桥梁的梁体得以复位,从而验证了SMA复合橡胶支座在桥梁隔震中的有效性、智能性和自恢复能力．
A smart seismic isolation system is proposed by compounding a laminated rubber bearing with SMA- composite rubber bearing.By using the proposed SMA-composite rubber bearings,the time-history analysis of a standard-span girder of a multi-span simple bridge excited by three kinds of earthquake wave that respectively denote three sorts of ground frequency is simulated,and the isolation effects are compared with those of the or- dinary rubber bearings.The results show that not only the isolation effects of the SMA-composite rubber bear- ings are significant,but the isolated girder can be reset after the earthquake.This demonstrates the effective- ness,intelligence and resetting capacity of the proposed SMA-composite rubber bearing in the bridge isolation.
A smart seismic isolation system is proposed by compounding a laminated rubber bearing with SMA- composite rubber bearing.By using the proposed SMA-composite rubber bearings,the time-history analysis of a standard-span girder of a multi-span simple bridge excited by three kinds of earthquake wave that respectively denote three sorts of ground frequency is simulated,and the isolation effects are compared with those of the or- dinary rubber bearings.The results show that not only the isolation effects of the SMA-composite rubber bear- ings are significant,but the isolated girder can be reset after the earthquake.This demonstrates the effective- ness,intelligence and resetting capacity of the proposed SMA-composite rubber bearing in the bridge isolation.
引文
[1]陈海泉，李忠献．基于形状记忆合金的桥梁隔震[J]．工程力学，2001，10(增)：838—842．Chen Haiquan,Li Zhongxian.Bridge isolation based on shape memory alloys[J].Engineering Mechanics,2001,10(Suppl):838—842(in Chinese).
[2]李忠献，陈海泉，刘建涛．应用SMA夏合橡胶支座的桥梁隔震[J]．地震工程与工程振动，2002．22(2)：143—148．Li Zhongxian,Chen Haiquan,Liu Jiantao.Bridge isolation with SMA-composite rubber bearing[J].Earthquake Engineering and Engineering Vibration,2002,22(2):143—148(in Chinese).
[3]陈海泉．应用形状记忆合金的大跨桥粱结构振动控制理论研究与振动台试验[D]．天津：天津大学建筑工程学院，2003．Chen Haiquan.Theoretical Research and Shaking-Table Test on Vibration Control for Long-Span Using Shape Memory Alloys[D].Tianjin:School of Civil Engineering,Tianjin Universify,2003(in Chinese).
[4]李国豪．工程结构抗震动力学[M]．上海：上海科学技术出版社，1980．Li Guohao.Aseismic Dynamics of Engineering Stature[M].Shanghai:Scientific and Technical Publishers,1980(in Chinese).
[5]陈海泉，李忠献，李延涛．应用形状记忆合金的高层建筑结构智能隔震[J]．天津大学学报，2002，35(6)：143—148．Chen Haiquan,Li Zhongxian,Li Yantao.Intelligent isolation of high-rise building structures applying shape memory alloys[J].Journal of Tianjin University,2002,35(6):143—148(in Chinese).
[2]李忠献，陈海泉，刘建涛．应用SMA夏合橡胶支座的桥梁隔震[J]．地震工程与工程振动，2002．22(2)：143—148．Li Zhongxian,Chen Haiquan,Liu Jiantao.Bridge isolation with SMA-composite rubber bearing[J].Earthquake Engineering and Engineering Vibration,2002,22(2):143—148(in Chinese).
[3]陈海泉．应用形状记忆合金的大跨桥粱结构振动控制理论研究与振动台试验[D]．天津：天津大学建筑工程学院，2003．Chen Haiquan.Theoretical Research and Shaking-Table Test on Vibration Control for Long-Span Using Shape Memory Alloys[D].Tianjin:School of Civil Engineering,Tianjin Universify,2003(in Chinese).
[4]李国豪．工程结构抗震动力学[M]．上海：上海科学技术出版社，1980．Li Guohao.Aseismic Dynamics of Engineering Stature[M].Shanghai:Scientific and Technical Publishers,1980(in Chinese).
[5]陈海泉，李忠献，李延涛．应用形状记忆合金的高层建筑结构智能隔震[J]．天津大学学报，2002，35(6)：143—148．Chen Haiquan,Li Zhongxian,Li Yantao.Intelligent isolation of high-rise building structures applying shape memory alloys[J].Journal of Tianjin University,2002,35(6):143—148(in Chinese).
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