钢栈道施工全过程抗风稳定性分析  

Analysis of Wind Resistance Stability of Steel Trestle Road during the Entire Construction

作　　者：谢晓鹏[1] 王娟[2] 窦国涛 杨露 高波[4] XIE Xiao-peng;WANG Juan;DOU Guo-tao;YANG Lu;GAO Bo(School of Civil Engineering and Architecture,Zhengzhou University of Aeronautics,Zhengzhou 450046,China;School of Water Science and Engineering,Zhengzhou University,Zhengzhou 450001,China;College of Civil Engineering,Henan University of Engineering,Zhengzhou 451191,China;Jiangsu Provincial Transportation Engineering Group Co.,Ltd.,Zhenjiang 212100,China)

机构地区：[1]郑州航空工业管理学院土木建筑学院,郑州450046 [2]郑州大学水利科学与工程学院,郑州450001 [3]河南工程学院土木工程学院,郑州451191 [4]江苏省交通工程集团有限公司,镇江212100

出　　处：《科学技术与工程》2020年第24期10045-10051,共7页Science Technology and Engineering

基　　金：国家自然科学基金青年科学基金(51708514);河南省科技攻关项目(182102310721)。

摘　　要：为研究钢栈道施工全过程的抗风稳定性问题,通过以黄河大桥施工栈道施工全过程为背景,采用有限元模拟方法对此进行了分析研究。结果表明:在横桥方向风荷载作用下,钢管桩打入地基,在钢管桩之间焊接剪力撑后,其位移绝对值最大为43.7 mm,其最大米塞斯应力为43.6 MPa;钢管桩顶部焊接桩顶梁后,位移绝对值最大为46.8 mm,其最大米塞斯应力为45.9 MPa;桩顶梁上架设贝雷梁,铺设桥面板后,位移绝对值最大为0.76 mm,其最大米塞斯应力为19.6 MPa。可见在横桥向风荷载作用下,从位移和应力角度来分析,钢管桩顶部焊接桩顶梁后为最不利情况。In this study,finite element analysis was implemented on the steel trestle road of the Yellow River Bridge to investigate its wind-resistant stability during the entire construction.In the experiment,steel pipe piles were driven into the foundation and welded with crossing braces among them.The results show that those steel pipe piles are subjected to a maximum absolute displacement of 43.7 mm,which corresponds to a maximum Mises stress of 43.6 MPa under the wind load that is perpendicular to the bridge.With beams welded on the pile top,the maximum absolute displacement of those pipe piles is 46.8 mm,corresponding to a maximum Mises stress of 45.9 MPa.Amounting beret beams on the pile-top beams and laying bridge deck slabs contribute to a significantly dropped maximum absolute displacement to 0.76 mm,corresponding to a maximum Mises stress of 19.6 MPa.Therefore,it is the most disadvantageous to weld beams on the pile top under the wind load that is perpendicular to the bridge,as it results in the largest displacement and Mises stress.

关 键 词：风荷载 黄河大桥 施工栈道 施工全过程 

分 类 号：U445[建筑科学—桥梁与隧道工程]