Prestressed concrete structure, so that the concrete is pre-compressed before loading. Prestressing can improve the tensile capacity of concrete under load, prevent or delay the appearance of cracks, increase the stiffness of the structure and save steel and cement. Preloading stress is used to reduce or offset the tensile stress of concrete caused by load, so as to control the tensile stress of structural members in a small range, even in a compressed state, to delay the emergence and development of concrete cracks, and then to improve the crack resistance and stiffness of members.

Advantages of pc member prestressed concrete

1, good crack resistance and high rigidity.

Due to the prestress of the member, the occurrence of cracks is greatly delayed. Under the action of service load, cracks will not appear or be delayed, thus improving the stiffness of the components and increasing the durability of the structure.

2. Save materials and reduce self-weight

Because the structure must use high-strength materials, it can reduce the amount of steel bars and the section size of members, save steel and concrete, and reduce the weight of the structure, which has obvious advantages for long-span and heavy-load structures.