双固定墩抗震体系在景观连续梁桥中的应用

Application of Double Fixed Pier Seismic System in Landscape Continuous Beam Bridges

摘要:

随着我国经济社会的发展，景观连续梁桥越来越多，各种景观造型及装饰极大地增加了桥梁上部结构自重、二期恒载及相应地震力。结合临沂市某景观桥工程，从桥梁抗震“概念设计”出发，通过采用新型抗震固定支座并进行合理布置，实现了景观连续梁桥的双固定墩抗震体系。通过采用MIDAS软件对桥梁进行抗震验算，验证了该抗震体系既满足正常使用变形要求，又大大降低了墩柱地震力，减少了下部结构材料投入，为高地震烈度地区的景观连续梁桥抗震体系选择提供新的思路。

Abstract:

With the development of economy and society in China， there are more and more landscape continuous beam bridges. Various landscape shapes and decorations greatly increase the superstructure weight， the second-phase permanent load and the corresponding seismic force of the bridge. Combined with a landscape bridge project in Linyi City， starting from the concept design of bridge seismic resistance， the double fixed pier seismic resistance system for landscape continuous beam bridges is realized by adopting the new seismic fixed bearings with the reasonable layout. By using MIDAS software， the seismic checking calculation of the bridge is carried out to verify that the seismic system not only meets the normal deformation requirements， but also greatly reduces the seismic force on piers and columns， reduces the input of substructure materials， which provides the new ideas for selecting the seismic resistant system of landscape continuous beam bridges in high seismic intensity areas.