斜坡坡度对山区桥梁地震响应的影响研究  

Study on the influence of slope gradient on seismic response of mountain bridges

作　　者：于健 谯岩 刘曦 艾长超 YU Jian;QIAO Yan;LIU Xi;AI Changchao(Qihe Chengtou Yellow River Bridge Management Co.,Ltd.,Jinan 250000,China;CCCC Infrastructure Maintenance Group Co.,Ltd.,Jinan 250000,China)

机构地区：[1]齐河城投黄河大桥经营管理有限公司,山东济南250000 [2]中交基础设施养护集团有限公司,山东济南250000

出　　处：《四川建材》2024年第7期169-171,共3页Sichuan Building Materials

摘　　要：为研究斜坡坡度对山区多跨连续梁桥地震响应的影响,以一座典型中小跨径多跨连续梁桥为研究对象,采用数值分析方法研究斜坡坡度对桥梁地震响应的影响。研究结果表明:随着斜坡坡度的增大,结构的振型发生明显变化,上坡墩振型质量参与减少,下坡墩振型质量参与增加。随着斜坡坡度的增大,多跨连续梁桥上坡墩墩底和桩顶内力逐渐增大,下坡墩墩底和桩顶内力逐渐减小,且两者差值逐渐增大。多跨连续梁桥上坡墩墩顶纵向位移和下坡墩墩顶纵向位移的差值随着斜坡坡度的增大变化趋势并不明显,但随着斜坡坡度的增大,桥墩整体墩顶位移呈现减小趋势。地处斜坡的桥梁与地处无坡度的桥梁在地震作用下受力存在明显差异,实际施工及设计时要具体情况具体分析。In order to study the influence of slope gradient on the seismic response of multi-span continuous girder bridges in mountainous areas,a typical medium-small-span multi-span continuous girder bridge is studied.The influence of slope gradient on the seismic response of bridges is studied by numerical analysis.The results show that with the increase of slope slope,the vibration mode of the structure changes significantly,the vibration quality of the uphill pier is reduced,and the vibration mode of the downhill pier is increased.With the increase of the slope of the slope,the internal forces of the upslope pier and the pile top of the multi-span continuous girder bridge gradually increase,and the internal forces of the bottom of the downhill pier and the top of the pile gradually decrease,and the difference between the two increases gradually.The difference between the longitudinal displacement of the pier top of the multi-span continuous beam bridge and the longitudinal displacement of the pier top of the downhill pier is not obvious with the increase of the gradient of the slope.However,as the slope of the slope increases,the displacement of the overall pier of the pier Presenting a decreasing trend.There is a significant difference in the force of the bridges on the slopes and the bridges without slopes under the action of earthquakes.The actual construction and design should be analyzed in detail.

关 键 词：桥梁工程 斜坡 山区 多跨连续梁桥 地震响应 非线性时程分析 

分 类 号：U441[建筑科学—桥梁与隧道工程]