伸缩缝间距对高墩连续刚构桥碰撞效应的影响  

Influence of Expansion Joint Spacing on Collision Effect of High-pier Continuous Rigid Frame Bridge

作　　者：刘桂权 LIU Gui-quan(Hunan Jiaojian Engineering Group Co.,Ltd.,Zhuzhou 412007,China)

机构地区：[1]湖南省交建工程集团有限公司,株洲412007

出　　处：《价值工程》2020年第22期159-162,共4页Value Engineering

摘　　要：以西南山区某一高墩连续刚构桥梁为例,利用OpenSees建立全桥有限元模型,利用接触单元法建立桥跨空间结构碰撞计算模型,探讨了伸缩缝间距对算例桥梁碰撞的和地震响应的影响。结果表明:伸缩缝间距会对高墩连续刚构桥的位移、墩底弯矩、碰撞力和碰撞次数产生显著影响;随着伸缩缝间距越大,梁端的相对位移增大,梁端加速度变化无明显规律,碰撞力和碰撞次数均会降低。Taking a high-pier continuous rigid-frame bridge in the southwest mountainous area as an example,the finite element model of the full bridge was established by using OpenSees,the collision calculation model of the spatial structure of the bridge was established by using the contact element method,and the effect of expansion joint spacing on the bridge collision and seismic response in the example was discussed.The results show that the expansion joint spacing will have a significant impact on the displacement,bending moment,impact force and number of collisions of the high-pier continuous rigid frame bridge;as the expansion joint spacing increases,the relative displacement of the beam end increases,there is no obvious rule of the beam end acceleration changes,and the collision force and the number of collisions will be reduced.

关 键 词：地震作用 连续刚构 碰撞效应 非线性时程法 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]