A SIMPLE METHOD FOR STRENGTHENING THE BRICK MASONRY INFILLED IN THE REINFORCED CONCRETE FRAME STRUCTURE
Keywords:RC building, strengthening brick masonry, seismic performance, reversed cyclic loading
The collapse of the brick masonry infill in the Reinforced Concrete (RC) structures has been
known as one of the causes of the many casualties during the earthquake. This clay brick masonry has been
commonly used as partitions in the RC frame structures in earthquake-prone areas such as West Sumatera,
Indonesia. Strengthening the brick masonry infill is expected to be able to increase the performance of the brick
masonry against the earthquake motions, which also may improve the seismic performance of RC structures.
In this study, four of 1/4 reduced-scale singe-bay and single-story RC frame specimens were prepared and
tested under lateral static reversed cyclic loading. The specimens include one specimen of RC frame infilled
with brick masonry and three specimens of RC frames infilled with strengthened brick masonry. Strengthening
of the brick masonry infill has used three types of wire mesh, namely plastic wire mesh, steel wire mesh, and
chicken wire mesh. The wire mesh was tacked on both sides of the diagonal area of the brick masonry infill.
The wire mesh was then fastened to columns and beams of the RC frame by using chemical epoxy adhesive.
The purpose of this experimental study is to define an effective, inexpensive, and easy to apply the
strengthening of the brick masonry infill such that it may be applied by the local labors in West Sumatera,
Indonesia. The structural test results have shown that all the strengthening methods increase the lateral strength
of the RC frame and can delay the failure of the brick masonry infill. Even though the strengthening by using
the steel wire mesh produced a higher increase in stiffness of the specimen compares to others, however
strengthening by using chicken wire mesh performed the most effective strengthening method. The presence
of the chicken wire mesh maintains the ductility of brick masonry infill and the RC frame as well.