CAJ | 학술논문

为揭示连续桥梁支座摩擦作用在地震波作用下的响应规律，采用动态时程分析法，以预应力混凝土现浇连续箱梁桥为背景，建立三种工况的有限元模型，借助ANSYS有限元软件分析了El-Centro波、天津波对支座、桩径、初始刚度等多种工况下的减震率影响的变化规律，得出了对于连续桥梁设置活动支座有利于桥梁抗震，认为在桥梁抗震中由固定墩单独抗震设计是偏于安全的。研究表明，对于连续桥梁在进行抗震设计时应考虑活动支座的摩擦作用，最佳摩擦系数的确定应考虑到桥梁结构刚度、模型简化体系的影响。
위게시련속교량지좌마찰작용재지진파작용하적향응규률，채용동태시정분석법，이예응력혼응토현요련속상량교위배경，건립삼충공황적유한원모형，차조ANSYS유한원연건분석료El-Centro파、천진파대지좌、장경、초시강도등다충공황하적감진솔영향적변화규률，득출료대우련속교량설치활동지좌유리우교량항진，인위재교량항진중유고정돈단독항진설계시편우안전적。연구표명，대우련속교량재진행항진설계시응고필활동지좌적마찰작용，최가마찰계수적학정응고필도교량결구강도、모형간화체계적영향。
In order to reveal the respond rules of the continuous bridge bearing friction action in seismic waves, using dynamic time history analysis, against the background of cast-in-situ prestressed concrete continuous box girder bridge, the finite element model in three working conditions is built. With the finite element software—ANSYS, this study analyzed the change rules of El-Centro waves and Tianjin seismic waves effections of vibration decreasing ratio on bearing, stake diameter and initial stiffness in several working conditions. The setting expansion bearing on continuous bridge is conducive to shock resistance, and separate seismic design for the anchor block in the bridge anti-earthquake is in favor of safety. The result of research shows that seismic design for continuous bridge should consider the frictional effect of expansion bearing, and the determination of the best friction coefficient should consider the influence of bridge structure stiffness and model simplified system.