基于复阻尼模型的连续刚构桥地震响应分析
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摘要
为了研究复阻尼模型下连续刚构桥的地震响应,文章讨论了利用复阻尼模型求解连续刚构桥地震响应的方法,并按相同的阻尼比,分别采用复阻尼模型和黏性阻尼模型计算了后渚连续刚构桥在不同地震动作用下的响应,将计算结果进行对比,分析了两种不同的阻尼模型对地震响应影响的差别。结果表明,采用不同类型的阻尼对地震响应影响很大,以复阻尼计算出的响应幅值作为设计值,更加偏于安全,对于保证桥梁结构的抗震安全更可靠。
In order to study the seismic responses of continuous rigid-framed bridge under complex damping model,the methods for solving continuous rigid-framed bridge seismic responses by using viscous damping and complex damping models are discussed.And with equal damping ratio,complex damping model and viscous damping model are used to calculate the responses of the Houzhu continuous rigid-framed bridge under various seismic ground motions separately.The contrast of calculated results is made and the difference of seismic responses between two different damping models is analysed.It will is shown that damping has notable influence on seismic responses.It is more safe using complex damping to calculate response amplitude as the design value.It will ensure the safety of seismic resistance for bridges.
In order to study the seismic responses of continuous rigid-framed bridge under complex damping model,the methods for solving continuous rigid-framed bridge seismic responses by using viscous damping and complex damping models are discussed.And with equal damping ratio,complex damping model and viscous damping model are used to calculate the responses of the Houzhu continuous rigid-framed bridge under various seismic ground motions separately.The contrast of calculated results is made and the difference of seismic responses between two different damping models is analysed.It will is shown that damping has notable influence on seismic responses.It is more safe using complex damping to calculate response amplitude as the design value.It will ensure the safety of seismic resistance for bridges.
引文
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[9]王元丰,李鹏.材料阻尼对钢筋混凝土框架结构动力响应影响分析[J].土木工程学报.2008,41(11):39-43.WANG Yuanfeng,LI Peng.Analysis of influence of material damping on the dynamic response of reinforced concrete frame structures[J].ChinaCivil Engineering Journal,2008,41(11):39-43.(in Chinese)
[10]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for Seismic of Design of Buildings[S].(in Chinese)
[2]郑家树,金邦元.大跨度钢管混凝土拱桥空间地震反应分析[J].西南交通大学学报,2003,38(1):53-56.ZHENG Jiashu,JIN Bangyuan.Three-dimensional seismic responses of long-span CFST arch bridge[J].Journal of Southwest Jiaotong University,2003,38(1):53-56.(in Chinese)
[3]周正华,廖振鹏,丁海平.一种时域复阻尼本构方程[J].地震工程与工程振动,1999,19(2):37-44.ZHOU Zhenghua,L1AO Zhenpeng,DING Haiping.A time domain complex damping constitutive equation[J].Journal of Earthquake Engineeringand Engineering Vibration,1999,19(2):37-44(in Chinese)
[4]朱镜清,朱敏.复阻尼地震反应谱的计算方法及其它[J].地震工程与工程振动,2000,20(2):19-23.ZHU Jingqing,ZHU Min.Calculation of complex damping response spectra from earthquake records[J].Journal of Earthquake Engineering andEngineering Vibration,2000,20(2):19-23.(in Chinese)
[5]朱敏,朱镜清.复阻尼地震反应谱计算的再研究[J].地震工程与工程振动,2001,21(2):36-40.ZHU Min,ZHU Jingqing.Further studies on calculation of complex damping seismic response spectra[J].Journal of Earthquake Engineering andEngineering Vibration,2001,21(2):36-40.(in Chinese)
[6]宗周红,赖苍林,林建筑.基于环境振动的大跨度连续刚构桥地震响应分析[J].铁道学报.2005,27(5):83-91.ZONG Zhouhong,LAI Canglin,LIN Jianzhu.Ambient vibration-based seismic response analysis of an existing prestressed continuous rigid-framedbridge[J].Journal of the China Railway Society,2005,27(5):83-91.(in Chinese)
[7]Myklestad N O.The concept of complex damping[J].Journal of Applied Mechanics,1952,19(3):20-30.
[8]王建平,刘宏昭,原大宁,等.含复阻尼振动系统的对偶原则及其数值方法研究[J].振动工程学报,2004,17(1):62-65.WANG Jianping,LIU Hongzhao,YUAN Daning,et al.Dual principle of oscillation systems with complex damping and its numerical method[J].Journal of Vibration Engineering,2004,17(1):62-6.(in Chinese)
[9]王元丰,李鹏.材料阻尼对钢筋混凝土框架结构动力响应影响分析[J].土木工程学报.2008,41(11):39-43.WANG Yuanfeng,LI Peng.Analysis of influence of material damping on the dynamic response of reinforced concrete frame structures[J].ChinaCivil Engineering Journal,2008,41(11):39-43.(in Chinese)
[10]GB50011-2010建筑抗震设计规范[S].GB50011-2010 Code for Seismic of Design of Buildings[S].(in Chinese)
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