地震作用下抗震与隔震连续梁桥动力响应试验研究
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
针对某跨海连续梁桥的抗震和隔震性能,通过将其简化,并根据相似比1∶10制作该梁桥单墩抗震与隔震试验模型,采用铅芯橡胶隔震支座,进行抗震及隔震地震模拟振动台试验,研究分别采用120、600、1 200和2 400年一遇地震波输入时结构的加速度响应、隔震支座剪力、墩顶剪力和隔震支座滞回性能,并根据单墩低周往复加载试验结果,判别在不同地震波作用时抗震桥墩和隔震桥墩所处的状态。试验结果显示:隔震后梁桥上部结构地震加速度响应在120和600年一遇地震时减小为抗震结构加速度响应的54%和55%;随着结构响应的增加,隔震位移越大,隔震支座耗能能力越强;采用隔震后,在2 400年一遇地震时,隔震梁桥整个桥墩在弹性范围内,桥墩地震响应小于开裂荷载,而抗震梁桥在600年一遇地震时,桥墩已达到开裂荷载。
Aimed to investigate the seismic and isolated performance of one pure continuous girder bridge across ocean,the seismic and isolated experimental model with the scale of 1∶ 10 was designed and made by simplifying continuous girder bridge as single pier model,and the shaking table test of seismic single pier model and isolated single pier model with lead rubber bearing( LRB) were carried out.Then the acceleration response,shear force of LRB,shear force at the top of pier and hysteretic performance of LRB were studied under inputting earthquake of 120,600,1 200 and 2 400 years return period respectively,and the state of seismic and isolated pier under different earthquake could be judged according to the experimental result of low-period recycle test. Experimental results showed that the acceleration response of superstructure of isolated bridge is reduced to 54% and 55% of seismic bridge under earthquake of 120 and600 years return period respectively. With the increase of structural response,the displacement of isolated layer will become larger and the ability of energy dissipation of LRB will become stronger. The whole pier of isolated bridge is in the elastic state and the seismic response of pier is less the cracking load under earthquake of 2 400 years return period. However,the pier of seismic bridge had been reaches to cracking load of pier under earthquake of 600 years return period.
引文
[1]范立础,王志强.梁桥减隔震设计[M].北京:人民交通出版社,2001.
    [2]Otsuka H,Tanaka H.A study on seismic behavior and displacement control of a continuous girder bridge with low friction sliding bearing support[C].Fourteenth World Conference on Earthquake Engineering,Beijing,2008.
    [3]Peng T B,Yu X T,Wang Z N,et al.Study of the seismic performance of expansion double spherical seismic isolation bearings for continuous girder bridges[J].Earthquake Engineering and Engineering Vibration,2012,11(2):163-172.
    [4]Liao W I,Loh C H,Lee B H.Comparison of dynamic response of isolated and non-isolated continuous girder bridges subjected to near-fault ground motions[J].Engineering Structure,2004,26(14):2173-2183.
    [5]Wei Z H,Yuan W C,Cheung P C,et al.Seismic performance of continuous girder bridges using cable-sliding friction aseismic bearing[J].Procedia Engineering,2011,14:914-921.
    [6]Chen Lingkun,Jiang Lizhong,Wang Liping,et al.Seismic isolation application to high-speed railway bridges with lead rubber bearings[J].Journal of Huazhong University of Science and Technology:Nature Science,2012,40(1):77-81.[陈令坤,蒋丽忠,王丽萍,等.高速铁路铅芯橡胶支座梁桥隔震研究[J].华中科技大学学报:自然科学版,2012,40(1):77-81.]
    [7]Ma Yongquan,Chen Shuisheng.Study of seismic response of isolated continuous girder bridge with LRB[J].Journal of China&Foreign Highway,2011,31(6):146-151.[马涌泉,陈水生.LRB隔震连续梁桥非线性地震响应研究[J].中外公路,2011,31(6):146-151.]
    [8]Chen Shuisheng,Ma Yongquan.A comparative study on seismic response of isolated continuous girder bridges with SRB and LRB[J].Transaction of Beijing Institute of Technology,2012,31(4):358-363.[陈水生,马涌泉.SRB与LRB隔震连续梁桥地震响应对比研究[J].北京理工大学学报,2012,31(4):358-363.]
    [9]Xu Xiuli,Yu Lanzhen,Wang Shuguang,et al.Study on seismic design for high-pier continuous girder bridges[J].Earthquake Resistant Engineering and Retrofitting,2005,27(5):63-67.[徐秀丽,于兰珍,王曙光,等.高墩连续梁桥减震设计研究[J].工程抗震与加固改造,2005,27(5):63-67.]
    [10]Gong Yiqiong,Hu Bo,Yuan Wancheng,et al.Seismic isolation design of continuous girder bridges[J].Journal of Tongji University,2001,29(1):94-98.[龚一琼,胡勃,袁万城,等.连续梁桥的减隔震设计[J].同济大学学报,2001,29(1):94-98.]
    [11]Tian Li,Li Zhongxian.Dynamic response analysis of basedisolated continuous girder bridges subjected to underground explosion waves[J].Journal of Tianjing University,2005,38(7):602-610.[田力,李忠献.地下爆炸波冲击下隔震连续梁桥动力响应分析[J].天津大学学报,2005,38(7):602-610.]
    [12]Liu Yanhui,Tan Ping,Zhou Fulin,et al.Experimental study of seismic performance for the double-chambers thin-wall concrete pier[J].China Civil Engineering Journal,2012,45(Supp 1):90-95.[刘彦辉,谭平,周福霖,等.双室薄壁钢筋混凝土桥墩抗震性能试验研究[J].土木工程学报,2012,45(增1):90-95.]

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