Investigation of thermal action on reinforced concrete frame structures

Temperature change causes decreasing or increasing internal forces in frame members and expansion or contraction. If the element is subjected to temperature changes, and if it is restricted, internal pressure and tensile forces may occur. Temperature changes in reinforced concrete structures cause expansion and contraction, ie volume change. If this expansion or contraction is completely or partially restricted, it will cause stresses, in the structural elements. If deformations due to expansion or contraction are prevented, unexpected internal forces occur in the structural elements. Stresses cause fracture or cracking in reinforced concrete structures. Therefore, it is necessary to calculate the amount of stress generated in structural elements due to the temperature difference, considering the temperature distribution in reinforced concrete structural elements. It is important to understand the behaviour of structures under thermal effects. But this remains controversial in the design of reinforced concrete structures. Although the structural design in the analytical model provides advantages in developing complex models, the actual structural behaviour still requires future research under thermal effects. In this study presents an analytical study is carried out to investigate seasonal temperature changes due to codes. In order to determine the effect of thermal difference on reinforced concrete buildings, numerical models based on different number of floors and different number of bays were prepared. Plate and reinforced concrete frame system is considered as numerical models and its have been temperature loaded. Temperature effects on slabs, columns and beams were loaded separately and together and have been evaluted conclusions. As a result of the calculations and evaluations, it has been found that the displacement from the building center to the outside of the building increased and this gave almost the same result on each floor, regardless of the number of floors. The vertical displacement increases in proportion to the number of floors. The largest displacement occurs when all elements or only slab and beam are temperature loaded. Due to the effect of temperature, the internal forces on the bearing elements have reached the maximum values if slab and beam were temperature loaded. When the temperature is given to all the elements and the temperature is given to the slab and the beam, the internal forces are equal. Therefore, only the effect of temperature on the slab and the beam is sufficient for the examination of the internal forces.