What is the function of temperature steel in ribbed floors?

The function of temperature steel in ribbed floors primarily serves to provide negative reinforcement within the slab thickness. In concrete structures, temperature steel is used to manage the effects of temperature variations, particularly thermal expansion and contraction. By distributing tensile forces that arise due to these temperature changes, temperature steel helps to control cracking and maintain the integrity of the structural elements.

In ribbed floor systems, which have a significant amount of concrete in a thin profile, the design often requires this type of reinforcement to effectively counteract the tensile stresses that could lead to cracking along the surface. Therefore, temperature steel is strategically placed to provide additional support in areas where the concrete is vulnerable to such stresses, ensuring durability and longevity of the structure.

The other options represent functions or considerations that are less relevant to the specific role of temperature steel in ribbed floor applications. For example, while reinforcing against earthquakes might involve additional designs or materials, it is not the primary role of temperature steel. Similarly, while thermal expansion is a concern that temperature steel addresses, its true purpose goes beyond just preventing expansion. Enhancing appearance is not a functional attribute associated with the role of temperature steel in the structural integrity of ribbed floors.