Analyze the design requirements of electromechanical seismic support system

Nowadays, the requirements for building anti-seismic are more and more strict, which is why the design specifications for electromechanical anti-seismic support systems are more and more standardized. Today, let's talk about the requirements for the design of electromechanical seismic support.

First of all, the design of the seismic support must use the finished component materials, not the section steel for welding. The steel yield strength of C-shaped channel steel used for the support shall not be lower than 250Mpa, and its tensile strength shall not be lower than 330Mpa.

In addition, the cold-formed thin-walled finished support channel steel is required for the inclined support C-shaped channel steel of electromechanical seismic support. Its section form is: 41x41mm, 41x52mm or 41x72mm. Its wall thickness shall not be less than 2.0mm, and its section shape shall be provided with stiffeners with a depth of not less than 1mm to ensure stress. The galvanized layer thickness of electromechanical seismic support must be ≥ 20 microns, and the relevant galvanized layer thickness test report and 240 hour neutral salt spray test report shall be provided.

For the door type seismic support, if double-sided splicing of C-shaped channel steel is required due to stress calculation, in order to ensure the overall stress performance of double-sided channel steel, it is required that the splicing process should adopt the back hole punching connection or integrated laser welding process, instead of discontinuous spot welding connection.

For electromechanical anti-seismic supports, the inner edge of the rolled edge of C-shaped channel steel must be provided with heat treatment teeth with a depth of not less than 0.9mm, and the matching connecting fasteners shall also be provided with dents with the same depth, so as to ensure that the connection can achieve ductile failure when the occluding connection mode encounters a large horizontal load.

Secondly, in order to ensure the reliable installation and connection, the connecting fasteners used in the electromechanical seismic support system must be integrated connecting fasteners, and the connection mode of separate combination of bolts and spring nuts cannot be used.