Experimental Research on Mechanical Properties of L-Shaped Joints Between Peripheral Wall Panels of Prefabricated Steel Structure Residences

As a part of the research on the countermeasures of prefabricated steel structure residences under rarely occurred earthquakes, the concept of realizing rapid replaceable resilient function of peripheral wall panel system under rarely occurred earthquakes was put forward, based on the traditional connection technique between wallboard and main structure was optimized and improved, and an L-shaped joint with angle steel perpendicular to light wall panel was proposed, six specimens of autoclaved aerated concrete wall panels (ALC) were designed. Through the quasi-static load test, the deformation behavior of the new connection and the failure mode of ALC were studied. The effects of thickness of angle steels at connections and restraint at the lower end of wall panels on the hysteretic characteristics, deformation capacity, stiffness degradation, angle steel strain and energy dissipation capacity of peripheral wall panels were discussed. The test results showed that the smaller thickness of angle steel of L-shaped joints, the greater the deformation, the better the energy consumption and the less the damage of wall panels;the lower end restraint of the wall panels was strengthened, the overall stiffness and bearing capacity of the peripheral wall panels were increased, small residual deformation;when the drift reached 2%, the L-shaped node had sufficient stability and the wall panel had no obvious damage; when the drift exceeded 2%, the L-shaped joint showed a good deformation performance, which could make the peripheral wall plate adapt to large structural deformation.