The seismic stability of facade system with facing by composite panels
The hinged ventilated facades installing is a perspective technology of buildings decoration. Suspended facade systems are widely used for construction and reconstruction of residential, administrative, public and industrial buildings. Using suspended facade systems for decorating exterior walls is helping designers to solve the problems of thermal protection and architectural and artistic expressiveness of buildings by using modern heat-insulating and decoration materials. The finishing of facades with composite panels is especially effective for buildings erected in areas with seismic activity because the using of lightweight cladding leads to a significant reduction in the mass of external walls and to the reduction of seismic loads. In this article we present the results of the experimental study of bearing capacity and operational reliability under dynamic loads of hinged facade system with toothed nodal fastening of aluminum composite panels, which was developed in the Moscow State Construction University. The tests were conducted on a vibrating platform of a pendulum type by a vibrational (resonant) method, which allows to determine the power load simulating seismic actions in a wide range of frequencies, in the Central Research Institute of Building Constructions named after V.A. Kucherenko (CRIBC). The results of experimental studies clearly demonstrated the increased seismic stability of the structure with toothed nodal fastening of composite panels in comparison with facade systems having a similar type of cladding. We found out that the developed design is able to dissipate the energy from the dynamic load due to the presence of additional connections in the structural solution of the tooth assemblies and allow to quench the energy of the oscillation of the system under seismic influences.