Energy efficiency of construction processes in Iraq

In this article, a threaded connection of precast reinforced concrete columns is proposed, which can be used to connect elements of fully assembled buildings and structures. The contact-screw joint of precast reinforced concrete consists of an upper and lower column, both having steel external threads of cylindrical shape connected in the end section, while the upper and lower part it consists of 16 deformed steel rods with welding, with 8 rods at each of the parts. The strength of the screw column connection is determined to ensure the transfer of axial loads and torque in the connections, providing for the destruction caused by thread shearing and buckling that can occur between connected columns. The structural characteristics of the connected columns have been determined in accordance with the standards. By means of the necessary calculations for the screw connection of columns made of precast reinforced concrete (steel-reinforced concrete, pipe concrete), the corresponding rigidity and strength have been confirmed. The new developed connections will help in the modularity of the construction of buildings and accelerate the installation process.