高墩格构式支架风致响应和扭转效应分析  

Analysis of Wind-induced Response and Torsional Effect of High-pier Lattice Support

作　　者：程为 CHENG Wei(China Railway Construction Bridge Engineering Bureau Group Fourth Engineering Co.,Ltd.,Harbin,Heilongjiang 150000)

机构地区：[1]中铁建大桥工程局集团第四工程有限公司,黑龙江哈尔滨150000

出　　处：《黑龙江交通科技》2024年第2期65-68,73,共5页Communications Science and Technology Heilongjiang

基　　金：中国铁建股份有限公司科研计划项目2019-B03。

摘　　要：针对格构式高支架杆件长、直径小、整体结构轻极易受到风荷载影响的问题,采用有限元模拟的方法建立四腿和六腿格构式高支架精细有限元模型,并通过时域法对模型进行修正,得出格构式高支架在10级风荷载作用下的位移,获取风振系数并对扭转响应和扭转风荷载进行分析。结果表明,四腿单柱格构式高支架在10级风下纵桥向的最大位移为85.9 mm,六腿格构式高支架在10级风下纵桥向的最大位移为42.8 mm,精细有限元模型可以很好地模拟两种不同工况下风荷载对杆件的影响。In view of the length,small diameter,light overall structure is easily affected by wind load.The fine finite element model is used to establish the four-legged and six-legged lattice high scaffold by finite element simulation,and the model is corrected by time domain method to obtain the displacement of the lattice high scaffold under the ten-level wind load,the wind vibration coefficient is obtained and the torsional response and torsional wind load are analyzed.The results show that the maximum displacement of the four-leg single-column high bracket is 85.9 mm in the tenth wind,and the maximum displacement of the six-leg high bracket is 42.8 mm in the tenth wind.The fine finite element model can well simulate the influence of wind load on the rod under two different working conditions.

关 键 词：钢管格构高支架 风荷载 风致响应 扭转效应 

分 类 号：U454.4[建筑科学—桥梁与隧道工程]