Abstract
Quasi-static tests were performed for the large-scale precast sandwich wall structures with friction devices. The frictional plates, steel plates, and bolts were used for friction devices to dissipate energy. The structural resilience could be easily realized by the proposed additional dissipated energy system. The results show that the structure with friction devices remained elastic after tests and the friction devices can effectively dissipate energy and protected the concrete structure. The residual displacements of structures with frictional connectors were generally large and additional prestressing force was needed to provide self-centering capability. The finite element analysis was conducted to simulate the experimental structure using the MSC.marc software. Numerical results were in good agreement with the experimental results. Parametric analysis showed that the dissipated energy and lateral load resistance could be improved by increasing the frictional force of vertical or horizontal connectors; however, the residual displacement would also be increased; the self-centering capability could be improved by increasing the posttensioning force. Simplified analysis procedure was also proposed and elaborated. The comparisons between the experimental and analytical results were satisfactory at the whole process of roof drift ratio, especially at 1/150 and 1/50, which were generally used to design the structures.
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