摘要
目的为了研究拱肋内倾角对拱桥抗震性能的影响,比较不同内倾角拱桥的位移及内力响应.方法利用有限元分析软件ABAQUS建立拱肋内倾角分别为0°、4°以及7°的中承式钢箱提篮拱桥多尺度模型,沿横桥向和顺桥向输入强震,分析中承式钢拱桥的拱脚截面、拱顶截面、主梁跨中截面和1/4拱跨截面的位移和内力响应.结果在横桥向地震动作用下,结构的位移响应随内倾角的增大而减小.在内力响应方面,随着内倾角的增大,拱桥四个截面轴力均增大,在1/4跨截面至拱顶截面的弯矩和剪力减小.顺桥向地震作用下,随着拱肋向内倾斜,拱桥位移响应、轴力和剪力逐渐减小,弯矩响应变化不明显.结论增大拱肋内倾角可有效提高拱桥的抗震性能.
In this paper,to study the effect of leaning angle on the seismic performance of arch bridges under ground motions and compare the force and displacement responses of arch bridges with different leaning angle(0°,4°and 7°),3-D space finite element models of half-through steel basket-type arch bridges with leaning angles of 0°,4°and 7°based on a practical engineering are established by software ABAQUS,then strong ground motions are input along the transverse and longitudinal directions to analysis the displacement and force response of arch bridge sections(arch foot,arch vault,mid-span,1/4 arch span).The results show that under the strong transverse ground motion,the displacement response of the structure decreases with the increase of the leaning angle,which improves the seismic performance of the arch bridge.As for the force response,the axial force of each section of arch bridge increase,while the moment and shear decrease from the 1/4 span of bridge to vault section.Under the longitudinal ground motions,the axial force and displacement of the sections are getting smaller as the arch rib is inclined inward,however the change of moment is weak.Increasing the leaning angle can effectively improve the seismic performance of arch bridge。
作者
隋伟宁
李航
王占飞
李天宇
SUI Weining;LI Hang;WANG Zhanfei;LI Tianyu(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,China,110168;School of Transportation Engineering,Shenyang Jianzhu University,Shenyang,China,110168;China Northeast Architecture Design&Research Institute Co.Ltd.,Shenyang,China,110000)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第5期796-804,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51378319)
关键词
桥梁工程
提篮拱桥
有限单元法
内倾角
抗震性能
bridge engineering
basket-type arch bridge
finite element method
leaning angle
seismic performance
