摘要
近年来,全球地震频发,而桥梁作为生命线工程,一旦在地震中发生破坏,将会给人民的生命财产及抗震救灾造成巨大的影响。大跨度预应力混凝土连续梁桥是最广泛应用的桥型之一,对其抗震性能进行深入的研究分析,是确保其良好安全性的重要内容。本文以托克托准格尔黄河特大桥为例,进行了地震反应谱分析和时程分析,分析时,考虑桩-土-结构相互作用以及滑动支座摩擦力对桥梁地震反应的影响。研究结果表明:①桩-土-结构相互作用减小了制动墩的内力,增大了其位移。②滑动支座摩擦力减小了桥梁的纵向地震反应,但对桥梁横向地震反应没有影响。③行波效应减小了制动墩的纵向地震反应,增大了其它桥墩的纵向地震反应,但对桥梁横向地震反应没有影响。
In recent decades, earthquake disaster frequently occurred all over the world. And bridges are lifeline engineering, once destruction happened; it will bring great damage to the lives and properties of people. PC continuous beam bridge is one of the most applied extensively bridges, it is necessary to make an in-depth study and analysis to the seismic performance of these bridges, which is an important factor for safety. In this paper, taking Tuoketuo-Zhungeer Yellow River Bridge as an example, two methods including spectrum response analysis and time-history analysis of earthquake are applied to the PC continuous beam bridge, considering the influence of the pile-soil-structure interaction and the friction force of sliding bearings on the seismic response of the bridge . The study results indicate that the internal force of the abutment pier decreases and the displacement increases because of the pile-soil-structure interaction. Secondary, the longitudinal seismic effect of the bridge decreases because of the friction force of sliding bearings, but it has not noticeable influence on the lateral seismic effect. Finally, traveling wave effect reduces the longitudinal seismic response of the braking pier and increases that of the other pier, but the influence on the lateral seismic response is not noticeable. It is expected to give some references for practical seismic design of similar bridges.
出处
《工程抗震与加固改造》
北大核心
2009年第2期21-25,共5页
Earthquake Resistant Engineering and Retrofitting
关键词
连续梁桥
地震反应分析
摩擦力
行波效应
时程分析
continuous beam bridge
seismic response analysis
friction force
traveling wave effect
time history analysis
