Advanced Steel Construction

Vol. 13, No. 3, pp. 190-205 (2017)


FIELD MONITORING AND NUMERICAL ANALYSIS OF

THERMAL BEHAVIOR OF LARGE SPAN STEEL STRUCTURES

UNDER SOLAR RADIATION

 

Zhongwei Zhao2, Hongbo Liu1,2* and Zhihua Chen1,2

1 State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China

2School of Civil Engineering, Tianjin University, China

*(Corresponding author: E-mail:This email address is being protected from spambots. You need JavaScript enabled to view it.)

Received: 15 March 2016; Revised: 9 June 2016; Accepted: 13 August 2016

  

DOI:10.18057/IJASC.2017.13.3.1

 

ABSTRACT:

The erection process of large span structures is complex and requires long time to complete, even a few years for some major engineering projects. The structure will expose to solar radiation which will result in larger temperature change in service phase. In order to obtain the temperature distribution and thermal behaviour of large span steel structures under solar radiation, a numerical simulation method based on the ASHRAE model is presented in this paper. In order to provide insights into temperature distribution and data to verify the presented numerical simulation method, field monitoring system was designed for an actual project. The temperature distribution mechanical response of the entire structure was derived by fielding monitoring. Using the temperature numerical simulation method, the temperature distribution and thermal behaviour of a typical steel structure, the lattice shell structures, were studied. The study showed that: 1) the daily temperature variation caused by solar radiation has little effect on the components which located at upper part of spatial latticed shell structures, the internal force can be released by deformation. 2) The components connected to supports were sensitive to thermal load. They were in shadow of the upper structures in general, so the temperature caused by solar radiation has smaller effect than effect of seasonal temperature difference. 3) The shell-shaped latticed shell structures behave like arch, and the internal force can be released by deformation.

 

Keywords:

Large span steel structures, thermal behavior, solar radiation, field monitoring, numerical analysis

 

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