双幅连续刚构桥施工阶段风荷载研究  

Wind load study during the construction phase of a double-width continuous rigid frame bridge

作　　者：吕卫军 叶茂 白桦[2] LYU Weijun;YE Mao;BAI Hua(Shaanxi Transportation Planning and Design Institute Co.,Ltd.,Xi'an 710065,China;School of Highway,Chang'an University,Xi'an 710064,China)

机构地区：[1]陕西省交通规划设计研究院有限公司,陕西西安710065 [2]长安大学公路学院,陕西西安710064

出　　处：《甘肃科学学报》2024年第4期62-67,共6页Journal of Gansu Sciences

摘　　要：为了研究双幅高墩连续刚构桥的风荷载特性,以陕西洛河大桥为工程背景,通过风洞测压试验,探讨了该连续刚构桥桥墩风压系数随施工阶段结构形式的变化规律,并基于计算流体动力学(CFD)数值模拟,研究了最大双悬臂状态上、下行双幅桥风致干扰效应随其间距的变化规律。结果表明:桥墩最大负压发生在最大悬臂施工阶段,对压力系数的影响明显;双幅桥之间的风致干扰效应随着间距的增大越来越弱。In order to study the wind load characteristics of the double-width high-pier continuous rigid frame bridge,taking the Luohe Bridge in Shaanxi Province as the engineering background,the variation law of the wind pressure coefficient of the continuous rigid bridge pier with the structural form in the construction stage was discussed through the wind tunnel pressure measurement test,and the variation law of the wind-induced interference effect of the maximum double-cantilever state with the spacing of the double-amplitude bridge was studied based on the numerical simulation of computational fluid dynamics(CFD).The results show that the maximum negative pressure of the pier occurs in the construction stage of the maximum cantilever and has an obvious influence on the pressure coefficient,and the wind-induced interference effect between the double-width bridges becomes weaker and weaker with the increase of the spacing.

关 键 词：连续刚构 风洞试验 风压系数 干扰效应 

分 类 号：U441.2[建筑科学—桥梁与隧道工程]