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为了提高刚架系杆拱桥的抗震性能,提出了一种新型抗震墩柱——被动分肢墩的抗震设计概念.即在墩柱中设置竖缝和连接件,利用连接件在罕遇地震下的破坏,降低墩柱抗侧刚度,避开场地卓越周期,减小结构的地震反应.以实桥为原型,设计了采用被动分肢墩的刚架系杆拱桥比例模型,进行了该模型拟静力试验研究.介绍了被动分肢墩的试验破坏过程,滞回特性以及对上部拱肋的影响,试验结果表明:与普通延性抗震墩柱相比,被动分肢墩具有良好的抗震性能.
In order to improve the seismic performance of the frame-tied arch bridge, a new concept of aseismic design of seismic pier-passive pier is proposed, namely, vertical seams and connecting pieces are set in the pier column, Which can reduce the lateral stiffness of the pier and avoid the remarkable cycle of the site and reduce the seismic response of the structure.Based on the real bridge, a proportional model of the frame-tied bridge with passive pier is designed and the model is proposed The static test research is introduced.The experimental failure process, the hysteretic behavior and the influence on the upper arch rib of the passive pier are introduced.The experimental results show that the passive pier has good seismic performance compared with the ordinary ductile seismic pier.