考虑支座摩擦和墩柱损伤的桥梁用液体粘滞阻尼器参数确定方法

对桥梁阻尼器参数确定方法的相关文献进行了回顾，指出现有常用参数分析法费时费力；而简化分析法存在仅适用于结构保持在弹性阶段、无法考虑罕遇地震下支座摩擦及墩柱轻度损伤等复杂情况的弊端。以非线性静力分析获得的能力曲线为基础，利用性能点、目标点求解时获得的关键参数，结合等效弹性单自由度体系附加非线性粘滞阻尼器的参数确定公式，提出了考虑支座摩擦和墩柱损伤的桥用阻尼器参数确定方法。将本文方法应用于某三跨连续梁桥抗震加固分析，验证了本文方法的实用性及准确性。指出了该方法具有的优势及使用时需注意的问题。本文方法可用于中小跨径桥梁抗震加固时液体粘滞阻尼器的参数确定。

Parameter determination method for fluid viscous damper used in bridges considering bearing friction and pier damage

By reviewing Parameter determination Method of Fluid Viscous Damper (FVD) applied in structural engineering, the defects of wasting time when parameter analysis method were used, and the defects of not considering the bearing friction and pier damage or other nonlinearity when using normal simplified method were pointed out. New Parameter determinations Method which can easily and quickly consider the above nonlinearity were given in this paper. Which can been expressed as follows: based on the pushover curve given by nonlinear static analysis, getting the key parameters when calculating performance point and target point, then substituting them into the structural dynamic formula of elastic SDF systems with non-linear fluid viscous dampers, parameter of the viscous damper can be achieved. Taking a seismic retrofitting example of a three-span continuous girder bridge using FVD, the accuracy and proficiency of the parameter determination method given by this paper was validated. The advantages and some problems which should be noticed when applying this method were given in this paper. The parameter determination method can be used in the seismic retrofit design of medium and small-span bridges when FVD were used.