عنوان مقاله:بررسی تاثیر حرارت بر قاب بتنی مسلح در نرم افزار اجزاء محدود

This article examines the effect of heat on reinforced concrete frame. A concrete frame with certain geometrical dimensions is modeled in ABAQUS finite element software, and its bearing capacity and other characteristics such as hardness and formability are obtained. Then, the concrete frame of 1000, 800, 600, 400, and 200 degrees Celsius was heated and the bearing capacities and coefficients were calculated. The purpose of investigating the effect of heat on the bearing capacity, hardness and formability of concrete frames subjected to heat is very important for making concrete structures resistant to fire.

The effect of heat on materials, including yield stress and modulus of elasticity of rebar, as well as resistance and modulus of elasticity of concrete, has been applied through the ASTM E119 heat code. The results show that the bearing capacity of the frame decreases with the increase in temperature, which is very significant at temperatures of 800 and 1000 degrees centigrade. Considering the dependence of hardness and formability on the change of the initial place of delivery, the decreasing trend in the frames depends on the change of the place of delivery. In the models under temperature of 800 and 1000, due to the collapse of the system, the hardness value has been greatly reduced.