Prestressed concrete works by introducing compressive stress into the concrete before it is loaded. This is achieved by using high-strength steel cables or wires, known as tendons, which are embedded in the concrete. The tendons are tensioned, or stretched, to create a compressive force in the concrete. This compressive force helps to counteract the tensile stresses that occur in the concrete when it is loaded.

Fritz Leonhardt made significant contributions to the development of prestressed concrete design and construction. His book, "Prestressed Concrete Design and Construction," is a comprehensive guide to the principles and applications of prestressed concrete. Leonhardt's work on prestressed concrete led to the construction of several notable prestressed concrete structures, including bridges, buildings, and dams.

Prestressed concrete is a type of concrete that has been subjected to compressive stress before it is loaded, which helps to improve its strength and durability. The concept of prestressed concrete was first introduced in the early 20th century, and since then, it has become a widely used construction material in the building industry. One of the pioneers in the field of prestressed concrete is Fritz Leonhardt, a German engineer who made significant contributions to the development of prestressed concrete design and construction.

Prestressed concrete has a long history dating back to the early 20th century. The first prestressed concrete structure was built in 1908 by the French engineer, Eugène Freyssinet. However, it wasn't until the 1930s that prestressed concrete began to gain popularity as a construction material. Fritz Leonhardt, a German engineer, was one of the key figures in the development of prestressed concrete. Leonhardt's work on prestressed concrete led to the construction of several notable prestressed concrete structures, including bridges, buildings, and dams.