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以一钢桁系杆拱桥工程为背景,研究非线性粘滞阻尼器对改善该钢桁系杆拱桥的抗震性能的影响,利用非线性动力时程分析方法,首先对纵桥向非线性粘滞阻尼器的阻尼系数C和阻尼指数r进行了参数分析,并与没有设置阻尼器情况的地震反应进行了比较;其次,分析了横桥向设置阻尼器对于改善横向的抗震性能的影响。比较结果表明,粘滞阻尼器具有良好的消能减震效果。
Taking a steel truss tied arch bridge project as a background, the influence of nonlinear viscous dampers on improving the seismic performance of the steel-truss tied arch bridge is studied. By means of nonlinear dynamic time history analysis, The damping coefficient C and the damping index r of the damper are analyzed and compared with those without the damper. Secondly, the influence of the transverse damper on the seismic performance is analyzed. The comparison results show that the viscous damper has a good energy dissipation effect.