Abstract
This paper presents the evaluation of the seismic performance of brick infilled RC frame structures with bed joint reinforcements based on reversed cyclic lateral load tests. Three specimens of the structural model of 1/4 scale-down single-story single-bay brick infilled RC frame was prepared, which were brick infilled RC frames with and without bed joint reinforcements. Two specimens of brick infills with bed joint reinforcements were different in the spacing of bed joint rebars. The specimens were tested by applying a reversed cyclic lateral loading in-plane direction. During the tests, the crack propagation was observed at the peak and residual drifts of each loading cycle to recognize the failure mechanisms of the specimens. As the results, although the use of the bed joint reinforcements ineffective to increase the lateral strength of the overall infilled frame structure. The rebars in mortar bed joints role to sustain the lateral strength in plastic deformation, and provide the whole structure with high ductility. It seemed that the rebars in mortar bed joints confined the brick infills. Therefore, the infilled RC frames can survive in large deformation without failure of the infills in out of the plane direction.
Highlights
Masonry walls are ubiquitously used as infill in reinforced concrete (RC) frame structure buildings in high seismic region
This paper presents the test results comparing the seismic performance between unreinforced brick infilled frames and brick infilled frames with bed joint reinforcements
Under cyclic lateral load on brick infilled RC frame (IFBM) specimen, the initial flexural crack was observed at the bottom of the tensile column in the cycle 1/800 at a drift ratio of 0.13%
Summary
Masonry walls are ubiquitously used as infill in reinforced concrete (RC) frame structure buildings in high seismic region. For providing excellent ductility performance on infilled frame structure and preventing the out of the plane failure of masonry infills, several strengthening methods have been developed by researchers such as the use mesh carbon and mesh glass [7], the use passive compression method [8], and reinforcements embedded in mortar bed joints. The use of horizontal rebars placed in mortar bed joints has been commonly used in brick masonry infills of RC buildings. It is presumed that the use of the horizontal rebars as bed joint reinforcements of brick masonry infills may enhance the ductility performance of the brick masonry infilled RC frame structures, effectively control the crack, and reduce the damage inplane and out of plane directions [12]. The seismic behavior of masonry infills with horizontal bed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
