|Table of Contents|

Three-dimensional solar temperature field and support arrangement of concrete curved box girder bridges(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2023年5期
Page:
61-71
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Three-dimensional solar temperature field and support arrangement of concrete curved box girder bridges
Author(s):
HAO Jian-ming1;  GAO Bo-ying1;  DING Nan2;  LI Rui-xuan3;  HAO Xian-wu1
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. School of Automobile,Chang'an University, Xi'an 710064, Shaanxi, China; 3. Gansusheng Yuanda Road Industry Group CO. LTD., Lanzhou 730050, Gansu, China)
Keywords:
bridge engineering;  curved box girder bridge;  three-dimensional solar temperature field;  temperature effect;  support arrangement
PACS:
U441.5
DOI:
10.19721/j.cnki.1671-8879.2023.05.007
Abstract:
In order to study the three-dimensional temperature field effect of concrete curved boxgirder, the transient thermal analysis using ANSYS was used to obtain the solar temperaturedistribution of curved box girder bridge in day, the effects of each parameter of curved girderon the temperature distribution of box girder web surface and the vertical and lateral temperaturedifference distribution of box girder cross-section were studied. On this basis, the mostunfavorable combination of vertical and horizontal temperature parameters of concrete curved boxgirder bridges were summarized, and the most unfavorable vertical and horizontal positivetemperature gradients to curved box girder bridges were proposed, combining with the regulationsof temperature loads in bridge design codes of various countries. The finite element softwareMIDAS/Civil was used to impose the most unfavorable positive temperature gradient of thecurved box girder bridge, and different boundary conditions were used for comparative analysis.The results show that the curvature radius and span parameters of the bridge, winter climate,section size, and thermal parameters have a significant impact on the transverse temperaturedifference of the box girder section,and the thickness of asphalt pavement and thermal parametershave a greater influence on the vertical temperature difference of the box girder in summer, theinner side of the middle pier is provided with a fixed support and the outer side is provided with atangential limit support, and the inner side of the other piers are provided with a radial limitsupport and the outer two-way movable support, which can make the displacement and bearingforce distribution of the curved box girder bridge more reasonable.4 tabs, 17 figs, 22 refs.

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Last Update: 2023-10-10