文档介绍：摘要据有关专家预测,我国正面临着一个新的地震活跃期。桥梁工程作为交通生命线的重要组成部分,却在历次地震中均有不同程度的破坏发生,并导致次生灾害更为严重。因此如何提高桥梁的抗震性能也就倍受重视,国内外学者就此提出了很多看法,利用粘滞阻尼器提高结构的抗震性能就是其中一种。对于粘滞阻尼器来说,阻尼系数C和阻尼指数a值选取的不同,粘滞阻尼器对结构响应的影响就不同。可见,粘滞阻尼器的参数分析和确定尤为重要,即为确保安装粘滞阻尼器的桥梁结构在地震发生时的安全性,对其参数加以分析研究具有十分重要的社会意义和经济效益。本论文结合工程实例对桥梁设置抗震粘滞阻尼器的参数进行分析研究,首先介绍了粘滞阻尼器的工作原理、特点、力学性能和它应用于桥梁结构时的安装方式;讨论了粘滞阻尼器的几种理论分析模型及其适用范围。进而建立了以实际工程为背景的动力计算模型,应用非线性时程分析方法,重点分析粘滞阻尼器参数改变对结构地震响应的影响, 归纳总结结构地震响应随阻尼参数改变的变化规律,并以能有效降低控制截面墩底弯矩、墩底剪力和墩梁相对位移为标准优选一组阻尼参数。最后对桥梁结构进行减震效果对比,结果表明设置粘滞阻尼器能有效降低结构的地震响应,是一种有效的减震措施。关键词:粘滞阻尼器、非线性时程分析、阻尼指数、阻尼系数、结构响应、参数分析 Abstract Experts predict thatChinaisfacing anewperiod is allimportant part of thetransport hub,but in theprevious earthquake occurred invarying degrees ofdamage andlead tomore serioussecondary how toimprove the seismicbehavior of thebridge hasbeen more proposed many measures, theviscousdampers is one viscousdamper,the damping coefficientCand thedamping index q are chosen different,viscousdampers on thestructuralresponse of and identificationoftheviscousdamperparameters isparticularly ensuretheinstallationof theviscousdampers forbridge inearthquake safety, analysis ofthedampingparameters hasgreat socialsignificance and economic benefits. This bines theengineeringexample of continuous bridge,analysis and researchestheparameters ,this paper describes theworking principle ofviscousdampers,characteristics,mechanical properties and Installation when itis applied tothebridge,and discussesthe theoretical analysis models of viscousdamper and ,this paper establishes apractical engineering background dynamic model,and USeS the nonlinear timehistoryanalysismethod,focused onanalyzing thedamper parameters on thestructuralseismicresponse,summarized dampingparameters change with thevariationofstructuralseismic standard ofselecting betterdamping parameters