无铺装层PK断面混凝土梁日照温度场分析

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Abstract To address the lack of a solar thermal gradient in a PK section concrete girder without pavement in highway bridge regulation and the limited research on this topic both local and abroad, an ANSYS model for the right branch cable-stayed bridge concrete girder without pavement of the Maanshan Yangtze River Expressway is built to calculate the temperature field. Results agree well with the measured values. The parameter analysis of the concrete girder without pavement shows that absorptivity significantly influences the maximum vertical temperature difference of the girder, and wind speed is another important factor. A vertical maximum gradient temperature model under the worst environment and its exponential function in the course of bridge construction are calculated. The distribution trend of the gradient temperature obtained from our research basically tallies with those from existing specifications of different countries. The values of the gradient temperature differ because of the effect of geography. Therefore, improving the specification for the gradient temperature of concrete girders without pavement in Chinese highway bridge regulations is suggested.

Key words： bridge engineering concrete girder PK section temperature field gradient temperature

Received: 04 March 2016

Fund:Supported by the National Key Research and Development Program of China (973 Program) (No. 2015CB057702); the National Natural Science Foundation of China (No. 51378080);and the Key Discipline of Civil Engineering Advantage Features Innovative Program of Changsha University of Science and Technology (No. 15ZDXK02)

Corresponding Authors: XIE Wen-chang,E-mail address:xie_wenchang@163.com E-mail: xie_wenchang@163.com

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	XIE Wen-chang
	ZHANG Yu-ping
	LI Chuan-xi

Cite this article:

XIE Wen-chang,ZHANG Yu-ping,LI Chuan-xi. Analysis of the Temperature Field of a PK Section Concrete Girder without Pavement Caused by Solar Radiation[J]. Journal of Highway and Transportation Research and Development, 2016, 10(3): 34-40.

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http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/ OR http://manu27.magtech.com.cn/Jwk_gljtkj_en/EN/Y2016/V10/I3/34

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