Abstract
Fire is one of the most devastating disasters that have caused human damage, prompting researchers to conduct numerous studies on the behavior of fire-prone elements and take action to minimize damage. With the development of computer simulation theories, it is possible to study the behavior of structures under the influence of different loads (static, dynamic, thermal ... etc), and this leads to saving time, effort and money cost instead of performing laboratory experiments. Thermal loads are considered one of the most dangerous loads to which concrete structures are exposed. Hence it is very important to know the thermal distribution in the cross section of the element exposed to high temperature. Whereas, by knowing the thermal distribution, the designed load and the expected failure load of the structural element can be calculated and thus take the necessary measures to reduce the fire risk as much as possible. In this research, an experimental and analytical study was conducted on models of reinforced concrete columns, where thermocouple were used in different places to monitor the temperature at the specified points, The experimental thermal distribution was compared with the analytical results of the ANSYS Workbench program. The analytical results showed a great accuracy compared to the experimental results. Consequently, an analytical model was simulated to simulate the experimental, through which it is possible to know the thermal distribution of the model. Keywords : thermal distribution, thermal analysis, thermocouple, ANSYS Workbench. DOI: 10.7176/CER/13-1-01 Publication date: January 31 st 2021
Highlights
Reinforced concrete is the basic material for construction, which is used in the installation of most engineering facilities around the world, the exposure of reinforced concrete structures to fire, is one of the most dangers challenges that lead to great destruction and failure the structural in addition to loss of life
With the development of computer simulation theories to study the behavior of elements and structures under the influence of different loads, it became possible to study the behavior of concrete columns under the influence of axial loads and non-axial, and to study the effect of fire and high temperature on these columns
It is possible to merge different types of analysis, such as structural analysis with thermal analysis and obtain results corresponding to the results that can be obtained through laboratory experiments with acceptable accuracy
Summary
A curve was drawn, that expresses the temperature increase with time for the furnace and the surface of the sample, as well as shown in figure (12). As for figures (13-14), the relationship between the rise temperature for the furnace and the surface of the sample with time, has been expressed according to a relationship that was deduced using the Orign2019 program [6]. This equation will be depended on, when conducting thermal analysis using ANSYS Workbench program. Figure (10): site of the sample in the electric furnace and the method for Connecting the thermocouples to the Data Logger device
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