期刊论文

中文

交通科学与工程

1674-599X

2017

33

2

37-42

10.16544/j.cnki.cn43-1494/u.2017.02.007

本校为第一机构

为了研究施工过程中温度场对板桁结合斜拉桥控制线形的影响效应,结合主梁温度场,对施工状态下的未铺装钢结构板桁进行了24 h连续测试.实测数据表明:在日照情况下,板桁结合主梁温度场为正温差梯度分布;在夜晚情况下,板桁结合主梁温度场为负温差梯度分布.利用实测温度场数据,建立有限元模型并进行了分析.研究结果表明:板桁温差效应对控制线形的影响明显.由板桁正温差引起的主梁竖向位移达到15.66 cm,上、下弦杆的纵向伸缩差达到1.66 cm;由板桁负温差产生的主梁竖向位移为2.15 cm,上、下弦杆的纵向伸缩差较小(0.23 cm).通过计算值与实测值进行对比,板桁温差效应占结构总响应的55%左右.

In order to study the effect of temperature field on the control linearity of plate-truss combined cable-stayed bridge during construction,combined with the specific background of the project,the 24 h continuous test of the temperature field of non surfacing steel structure plate-truss composite beam in the construction state is carried out.The measured data show that the temperature field of plate-truss composite beam is a positive temperature gradient distribution during the daytime sunshine.At night,the temperature field of plate-truss composite beam is with negative temperature gradient.Th...