MATEC Web Conf.
Volume 319, 20202020 8th Asia Conference on Mechanical and Materials Engineering (ACMME 2020)
|Number of page(s)||5|
|Published online||10 September 2020|
Experimental analysis of gradient of negative temperature for polypropylene fiber concrete U-shaped girder
School of Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
2 China Railway 14th Bureau Group Co., Ltd, Jinan 250101, China
3 Shandong Hi-speed Hubei Development Co., Ltd, Wuhan 430010, China
* Corresponding author: email@example.com
To study the negative temperature gradient models of a rail transit U-shaped girder during the winter season, a U-shaped rail transit girder was researched in Qingdao. The temperature field of the midspan section was observed for a 48-h period during the winter. The maximum vertical and horizontal temperature difference distributions were obtained, and the negative temperature gradient models for the winter were established. The results show that the vertical temperature gradient models of the web and bottom slab should be considered. The vertical temperature gradient model of the web is a piecewise function composed of exponential and linear functions. The vertical temperature gradient model of the bottom slab is an exponential function. The transverse temperature gradient of the web is obvious, whereas the transverse temperature gradient of the bottom slab is slight.
© The Authors, published by EDP Sciences, 2020
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