The main function of expansion joints

Prevents cracks in the house due to climate change. The method is to reserve gaps at certain distances along the length of the building, and disconnect the building from the roof, walls, floors and other components above the ground. disconnect. The width of the expansion joint is generally 20 mm to 30 mm, and the insulation material is filled in the joint. The spacing between the two expansion joints is clearly specified in the building structure code.

If the plane size of the building is too long, due to thermal expansion and contraction, it may cause excessive temperature stress in the structure. It is necessary to set a joint at a certain length of the structure to divide the building into several parts, and the joint is the temperature joint. For different structural systems, the distance between the expansion joints is different, which is specified in Article 8.1 of the current Chinese code "Code for Design of Concrete Structures" GB50010-2010.