粘滞阻尼器在金水沟特大桥中的应用研究
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摘要
金水沟特大桥为黄韩侯铁路线上的一座高墩大跨刚构连续梁桥,对其进行抗震分析后发现,地震力控制桥梁的设计。为减小其地震反应,在金水沟特大桥上设置液体粘滞阻尼器。采用动力非线性时程分析方法,对非线性粘滞阻尼器的阻尼系数和阻尼指数进行参数敏感性分析,研究不同阻尼器参数对减震效果的影响,并与不设阻尼器情况的地震响应结果进行比较。分析表明,在金水沟特大桥上设置粘滞阻尼器后,可以有效地降低结构关键部位在地震作用下的位移,减小结构构件的地震力,确保结构在地震下的安全。
Jinshuigou Bridge is a continuous rigid frame girder bridge with high piers in Huanghanhou Railway.The results of seismic analysis on it showed that the bridge design was dominated by the earthquake force.So,fluid viscous dampers were set on the bridge to control the seismic responses.In the paper,the sensitivity analysis of damping coefficient and damping exponent of fluid viscous damper are performed by using nonlinear dynamic time-history method,and the shock absorption effects from different damper parameters are discussed in contrast with that of cases without the damper.It indicates that setting the viscous damper in Jinshuigou Bridge could reduce efficiently the displacement of key positions as well as the seismic response of the bridge,and so could ensure the safety of the structure under earthquake.
Jinshuigou Bridge is a continuous rigid frame girder bridge with high piers in Huanghanhou Railway.The results of seismic analysis on it showed that the bridge design was dominated by the earthquake force.So,fluid viscous dampers were set on the bridge to control the seismic responses.In the paper,the sensitivity analysis of damping coefficient and damping exponent of fluid viscous damper are performed by using nonlinear dynamic time-history method,and the shock absorption effects from different damper parameters are discussed in contrast with that of cases without the damper.It indicates that setting the viscous damper in Jinshuigou Bridge could reduce efficiently the displacement of key positions as well as the seismic response of the bridge,and so could ensure the safety of the structure under earthquake.
引文
[1]中华人民共和国铁道部.GB50111—2006铁路工程抗震设计规范[S].北京:中国计划出版社,2009.
[2]中华人民共和国交通运输部.JTG/T B02—01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[3]刘振宇,等.南宁大桥粘滞阻尼器参数分析[J].桥梁建设,2007(4):26.
[4]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报,2005,18(3):38.
[5]斌暄,王磊,王歧峰.使用非线性粘滞阻尼器的桥梁在地震反应中的响应分析[J].公路交通科技,2007,24(10):77.
[6]魏锦涛.液体粘滞阻尼器及其在土木工程中的应用[J].四川建筑科学研究.2006,32(2):125.
[7]蒋建军,周红波.非线性粘滞阻尼器对悬索桥地震反应的影响[J].城市道桥与防洪.2004(6):100.
[8]陈永祁,耿瑞琦,马良喆.桥梁用液体黏滞阻尼器的减振设计和类型选择[J].土木工程学报,2007,40(7):57.
[9]蒋建军,蒋劲松.广西南宁大桥液体粘滞阻尼器设计[J].世界桥梁,2007(4):10.
[10]方志.粘滞阻尼器参数对大跨度桥梁抗震性能影响研究[J].公路交通科技.2009,26(2):75.
[2]中华人民共和国交通运输部.JTG/T B02—01—2008公路桥梁抗震设计细则[S].北京:人民交通出版社,2008.
[3]刘振宇,等.南宁大桥粘滞阻尼器参数分析[J].桥梁建设,2007(4):26.
[4]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报,2005,18(3):38.
[5]斌暄,王磊,王歧峰.使用非线性粘滞阻尼器的桥梁在地震反应中的响应分析[J].公路交通科技,2007,24(10):77.
[6]魏锦涛.液体粘滞阻尼器及其在土木工程中的应用[J].四川建筑科学研究.2006,32(2):125.
[7]蒋建军,周红波.非线性粘滞阻尼器对悬索桥地震反应的影响[J].城市道桥与防洪.2004(6):100.
[8]陈永祁,耿瑞琦,马良喆.桥梁用液体黏滞阻尼器的减振设计和类型选择[J].土木工程学报,2007,40(7):57.
[9]蒋建军,蒋劲松.广西南宁大桥液体粘滞阻尼器设计[J].世界桥梁,2007(4):10.
[10]方志.粘滞阻尼器参数对大跨度桥梁抗震性能影响研究[J].公路交通科技.2009,26(2):75.
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