摘要
给出了地震行波输入下大跨度桥梁的主动、半主动和被动控制分析方法,并对1座4跨连续刚构桥梁进行了行波输入下地震反应计算,分析了8种振动控制情况下纵桥向和横桥向地震反应的减震效果。结果表明,行波效应会明显降低该连续刚构桥梁8种振动控制方法的纵桥向地震反应减震效果,最大开关控制算法对纵桥向的减震效果相对最好;最大阻尼力被动控制和最大开关控制算法对横桥向的减震效果相对最好,采用该2种控制方法时行波效应对横桥向总体减震效果影响不大。
The analysis approach to active, semi-active and passive control for long-span bridges under seismic traveling-wave inputs is presented. The seismic response calculation for a four span continuous rigid-framed bridge under seismic traveling-wave inputs is performed. The vibration-suppressing effectiveness of seismic responses for lognitudinal and transverse bridges is analyzed with eight vibration control methods. The results indicate that traveling-wave effect can evidently reduce the vibration-suppressing effectiveness of seismic responses in longitudinal bridge direction with eight vibration control methods for the continuous rigid-framed bridge. The maximal switch control algorithm is better for the vibration-suppressing effectiveness of longitudinal bridges correspondingly. The maximal damping force passive control algorithm and the maximal switch control algorithm are better for the vibration-suppressing effectiveness of transverse bridges correspondingly. With these two control methods, the travelingwave effect does not influence the total vibration-suppressing effectiveness of transverse bridges intensively.
出处
《地震工程与工程振动》
CSCD
北大核心
2006年第5期201-207,共7页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金重点项目(50439030)
关键词
行波效应
振动控制
连续刚构桥梁
减震效果
traveling-wave effect
vibration control
continuous rigid-framed bridge
vibration-suppressing effectiveness
