高烈度区人行桥阻尼器参数分析

The Parameter Analysis of Pedestrian Bridge Damper in High Intensity Area

采用MIDAS建立一座高烈度区人行桥的有限元计算模型,分析其动力特性,并采用非线性时程分析法对比了不同阻尼器参数下(阻尼系数C和速度指数α)的地震响应。分析结果表明:设置粘滞阻尼器后,可有效降低结构关键部位在地震作用下的相对位移,避免了相邻构件之间可能发生的碰撞。

Using MIDAS, this paper established the finite element calculation model of pedestrian bridge in a high intensity area, and analyzed its dynamic characteristics. It also compared the seismic response under different damper parameters(damping coefficient C and speed index α) using nonlinear time history analysis method. The analysis results showed that after setting the viscous damper, it could effectively reduce the relative displacement of the structure key parts under the earthquake action and avoid the possible collisions between the adjacent components.