|Table of Contents|

Spatial sunshine temperature field of concrete curved box girder bridge(PDF)

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

Issue:
2022年4期
Page:
40-51
Research Field:
桥梁与隧道工程
Publishing date:

Info

Title:
Spatial sunshine temperature field of concrete curved box girder bridge
Author(s):
ZHU Jin-song1;  WANG Zhen-yang1;  GU Yu-hui2;  LI Yan-bo1
(1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Hebei Xiong'an Rongwu Expressway Co., Ltd, Baoding 071700, Hebei, China)
Keywords:
bridge engineering;  space temperature field;  concrete curved box girder bridge;  three-dimensional shelter;  time history change
PACS:
U448.35
DOI:
10.19721/j.cnki.1671-8879.2022.04.005
Abstract:
In order to study the spatial sunshine temperature field and its variation law of concrete curved box girder bridge, firstly, based on the theory of heat transfer and the three-dimensional shielding theory of solar radiation, the air heat transfer in concrete enclosed space was considered, the calculation process of spatial sunshine temperature field of curved box girder bridge based on finite element method was proposed. Then, a concrete curved box girder bridge under construction in Hebei Province was chose as an engineering case, the time-varying law of the spatial sunshine temperature field of the bridge on the summer solstice of 2019 was analyzed, and the influence of curvature radius and flange width on the spatial sunshine temperature field of the concrete curved box girder bridge was analyzed. The results show that due to the shielding effect of the flange plate of the curved box girder bridge and the change of the incident angle of the sun rising in the east and setting in the west, the temperature time-varying law of the webs of different sections is different. The time of the highest temperature of the west web section is about 3 hours later than that of the east web section. The positive vertical temperature gradient temperature difference of the outer web of the curved box girder bridge is the largest, about 15.3 ℃, and the maximum temperature difference of the outer web of different sections is about 0.8 ℃. The width of flange plate has obvious influence on the spatial temperature distribution characteristics of concrete curved box girder bridge, while the radius of curvature has little influence on it.2 tabs, 18 figs, 25 refs.

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Last Update: 2022-07-20