investigation of gate braces due to earthquakes near and far from fault

In order to solve the problem of low stiffness in the framing system, as well as the problem of low formability in a frame with a coaxial bracing, popov proposed a non-axial brace. by choosing the right amount of exit from the center, the system is sufficiently hard and through supplying the shear of the interface beam, the system's ductility is supplied. thissystem has a good ductility, but in order to ensure its plasticity, the interface beam, which is one of the main elements of the structure, surrenders, causing serious damage to the ceiling and difficult to repair after the earthquake. due to fixing problems, the gateway system has been developed.