Investigation of concrete box girder positive temperature gradient patterns considering different climatic regions

Structures ◽  
2022 ◽  
Vol 35 ◽  
pp. 591-607
Author(s):  
Chenzhi Cai ◽  
Shiji Huang ◽  
Xuhui He ◽  
Tieming Zhou ◽  
Yunfeng Zou
Keyword(s):  
Temperature Gradient ◽  
Positive Temperature ◽  
Box Girder ◽  
Climatic Regions ◽  
Concrete Box Girder ◽  
Positive Temperature Gradient

Research of Temperature Field of Long Span Concrete Box Girder Bridge Caused by Solar Radiation

2012 ◽  
Vol 256-259 ◽  
pp. 1635-1639
Author(s):  
Cun Ren Jiang ◽  
Jian Min Ren ◽  
Zhuo Ling Wang
Keyword(s):  
Temperature Field ◽  
Temperature Gradient ◽  
Solar Radiation ◽  
Structure Design ◽  
Box Girder ◽  
Qinghai Province ◽  
Long Span ◽  
Concrete Box Girder ◽  
Girder Bridge ◽  
Bottom Slab

When stimulate temperature field of concrete box girder caused by solar radiation with ANSYS, it’s feasible to turn boundary conditions to third boundary condition. Taking Ping'an Huangshui River Super-large Bridge in Qinghai Province for example, the research analyzes box girder temperature field distribution and deduces realistic temperature gradient mode by comparing calculations with measurements. Calculations show that bottom slab of box girder also has quite big temperature gradient which should be taken seriously in bridge structure design.

Study on temperature gradient of concrete box girder in Shandong area based on long-term monitoring

2021 ◽  
Author(s):  
Zeying Yang ◽  
Yinglin Sun ◽  
Chenghe Wang ◽  
Zhengquan Cheng ◽  
Tianmin Wang ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Box Girder ◽  
Long Term Monitoring ◽  
Concrete Box Girder ◽  
Term Monitoring

Temperature Sensitivity Analysis of Large Span PC Concrete Box-Girder Bridge

2013 ◽  
Vol 291-294 ◽  
pp. 1060-1063
Author(s):  
Guo Jing He ◽  
Jie Lu ◽  
Jin Yi
Keyword(s):  
Temperature Gradient ◽  
Stress Condition ◽  
Element Analysis ◽  
Box Girder ◽  
Climate Conditions ◽  
Temperature Changes ◽  
Girder Bridges ◽  
Concrete Box Girder ◽  
Concrete Box Girder Bridges ◽  
Girder Bridge

Setting in the youshui Bridge Project and referring to the stipulation on the temperature gradient in current code, this aims to investigate the effects on the stress condition of concrete box-girder bridges caused by the overall heating, cooling or standard temperature changes. The process was carried out by virtue of the general finite element analysis software—MIDAS/CIVIL. The result showed that temperature would greatly affect the structural behavior of a bridge, in particular that the stress condition of the top plate is sensitive to temperature changes. It was therefore suggested that climate conditions should be taken into consideration when determining the temperature gradient values in the code.

Effects of Solar Temperature Gradient on Long-Span Concrete Box Girder during Cantilever Construction

2016 ◽  
Vol 21 (3) ◽  
pp. 04015061 ◽  
Author(s):  
XuMing Song ◽  
Hani Melhem ◽  
Jun Li ◽  
QingYuan Xu ◽  
LiJun Cheng
Keyword(s):  
Temperature Gradient ◽  
Box Girder ◽  
Long Span ◽  
Concrete Box Girder ◽  
Cantilever Construction

Thermal Effects on Box Girder Concrete Bridges

2017 ◽  
Vol 738 ◽  
pp. 273-283
Author(s):  
Martin Moravcik ◽  
Lukas Krkoska
Keyword(s):  
Temperature Gradient ◽  
Prestressed Concrete ◽  
Design Procedure ◽  
Concrete Bridges ◽  
Temperature Gradients ◽  
Box Girder ◽  
Bridge Structures ◽  
Concrete Box Girder ◽  
Girder Bridge ◽  
Recorded Temperature

Thermal load, especially vertical temperature gradient, is an important factor that should be considered during the bridge design procedure. In the world, several researches focusing on temperature gradient was made, mostly in USA and China, but only a few analyzed actual temperature gradients measuring at European bridges. In this paper, short overview of temperature loading of bridge structures is described. Then, the temperature measurement of prestressed concrete box girder bridge built by launching method is analyzed. Recorded temperature gradient has been compared with temperature gradients for the concrete box girder cross section recommended by Eurocode design specifications.

scholarly journals Temperature Gradient and Its Effect on Long-Span Prestressed Concrete Box Girder Bridge

2020 ◽  
Vol 2020 ◽  
pp. 1-18
Author(s):  
B. Gu ◽  
F. Y. Zhou ◽  
W. Gao ◽  
F. Z. Xie ◽  
L. H. Lei
Keyword(s):  
Temperature Distribution ◽  
Temperature Gradient ◽  
Prestressed Concrete ◽  
Longitudinal Direction ◽  
Measured Data ◽  
Box Girder ◽  
Long Span ◽  
Concrete Box Girder ◽  
Girder Bridge ◽  
Gradient Models

Temperature variations in the girder at two cross-sections of a long-span prestressed concrete box girder bridge (PCBG) were analysed based on measured data. The results show that the temperature distribution in the concrete box girder (CBG) is strongly influenced by its size, and the temperature distribution in the girder changes along the longitudinal direction of the bridge. To clarify the temperature distribution in the long-span PCBG bridge, a two-dimensional (2D) temperature prediction model, validated by the measured data, was proposed, and the effect of the girder size on the temperature distribution of the CBG was studied using the model. Based on the results of the studies, simplified vertical and transverse temperature gradient models that could consider changes along the longitudinal direction of the bridge were proposed and validated by using the measured data and three-dimensional (3D) mechanical finite element model (FEM) of the bridge. Then, the deformations and stresses derived from the proposed temperature gradient models and the models according to different codes were studied and compared. Finally, conclusions and recommendations for future bridge design are provided.

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