地震行波输入下大跨连续刚构桥梁半主动控制效应分析

给出了地震行波输入下大跨度桥梁的半主动控制分析方法，对一座四跨连续刚构桥梁进行了具有不同视波速的行波输入下的半主动控制计算分析，并与地震动一致输入下的计算结果进行比较。结果表明，行波效应对该大跨连续刚构桥梁的地震反应和减震效果影响显著，对主梁和桥墩均会在较低视波速地震行波输入时表现出不利影响。为此，建议在确定半主动控制系统的参数时应考虑地震行波效应的影响以确保控震效果。

SEMI-ACTIVE CONTROL EFFECT ANALYSIS FOR LONG-SPAN CONTINUOUS RIGID-FRAMED BRIDGE UNDER SEISMIC TRAVELLING WAVE INPUT

The approach for analysis of semi-active control of long-span bridge under seismic travelling wave input is established.The semi-active control effect calculation and analysis are performed on a four span continuous rigid-framed bridge under seismic travelling waves with different apparent surface velocities,and comparison is made between the calculating results in this case and those under uniform ground motion input.The results indicate that travelling wave effect remarkably influences the seismic responses and vibration control effects on the long-span continuous rigid-framed bridge.It is disadvantageous to the responses of the beams and the piers under the travelling wave input with lower apparent surface velocity.Therefore,it is suggested that the travelling wave effect should be considered for the selection of parameter values of semi-active control system in order to get the designed control effect.