摘要
无缝桥整体性好、行车舒适、后期养护维修少,地震作用下不易落梁,"小震不坏、大震不倒",具有可持续、高耐久与较强的防灾减灾能力。不过,桥台桩基是此类型桥梁的最不利部位。国外无缝桥的桥台桩基多采用H型钢,然而,我国主要以混凝土桩为主,两者在"中震可修与易损性"上存在一定差异。目前,对混凝土桩基的无缝桥抗震性能尚缺乏深入系统的研究,抗震规范也未给出相应的设计计算方法,影响了其应用与发展。为此,本文综述了无缝桥抗震性能特点与设计计算方法的研究现状,提出了无缝桥抗震性能的主要研究方向与简化抗震设计计算方法,可为此类型桥梁抗震规范的制定提供参考。
There are no joints and bearings for jointless bridge while abutments integrate with girders, which make its structure simple and convenient to maintain and is not easy to fall down under the impact of earthquake. That means small earthquake cannot damage jointless bridges while rare earthquake cannot destroy them. However, the piles of abutment are one of the most disadvantageous components for jointless bridge. In order to accommodate the jointless bridge to the requirements of seismic resistance, H-shaped rolled steel for the piles of abutment are usually adopted in foreign developed countries. Nevertheless, in our country, most of jointless bridges usually use concrete piles. The flexural stiffness and deformation behavior of concrete piles are different from roiled steel one, The guide spscifications for Seismic Bridge Design in our country do not present the method of how to design and calculate the seismic shear force yet. Therefore, the seismic features and design method are reviewed especially for the jointless bridges with concrete piles. The main research orientation and design method of seismic performance are presented, which can be recommended to the seismic specification.
出处
《地震工程与工程振动》
CSCD
北大核心
2015年第5期15-22,共8页
Earthquake Engineering and Engineering Dynamics
基金
国家自然科学基金项目(51578161
51278126
51208111)
