What are the two types of loads applied to concrete?

In the context of concrete, understanding the types of loads is crucial for structural integrity and safety. The correct answer highlights the two primary types of loads that are commonly applied to concrete structures: shear and tensile loads.

Shear loads refer to forces that cause one part of a structure to slide past another, which can create internal stresses within the material. Concrete is generally strong in resisting compressive loads, but it has low tensile strength. Therefore, tensile loads are particularly critical because they can lead to cracking or failure in concrete if not properly managed within the design.

While other combinations of loads, such as compression and bending, torsion and compression, or bending and shear, mention important concepts, they do not capture the specific and significant risks associated with tensile and shear forces in concrete applications. The focus on shear and tensile in the correct option emphasizes the need for engineers and architects to design concrete structures that adequately address these concerns to ensure safety and longevity. Understanding these types of loads allows for appropriate material selection and structural design to mitigate risks related to such forces.