EXPERIMENTAL INVESTIGATIONS OF 1/3-SCALE R/C FRAME WITHINFILL WALLS BUILDING STRUCTURES

摘要

This paper presents experimental dynamic shaking table tests on 1/3-scale specimens of RC framestructures with infill walls under real earthquake excitations, with the aim of verifying the validity andapplicability of the proposed retrofitting technique. Taking into account the similitude requirements, theartificial mass simulation has been applied as a method for model design of the specimens. Accordingly,the time scale and the intensity of earthquake records have been altered to ensure that the shaking tablemotion will produce the required inelastic behavior of the model. The first test specimen was a pure 3DR/C frame structure with infill walls. The second specimen had additional CFRP strips on the inner andouter faces of the infill walls applied using epoxy resin, for the purpose of demonstrating the proposedretrofitting technique. Longitudinal deformations, lateral deformations, shear deformations of the infillwalls and displacements at the column bases were measured. Accelerometers were mounted to measurethe accelerations in both longitudinal and lateral directions. The general conclusion is that the CFRP stripsput on the infill walls can significantly improve the RC frame behavior under strong seismic excitation.