Experimental Study of Infill Walls with Joint Reinforcement Subjected to In-Plane Lateral Load

Buildings

Edén Bojórquez¹  Alfredo Reyes-Salazar¹  Jesús Martin Leal-Graciano¹  Federico Valenzuela-Beltrán¹  Juan Bojórquez¹  Juan J. Pérez-Gavilán² 

[1] Facultad de Ingeniería, Universidad Autónoma de Sinaloa, Calz. Las Americas Nte. S/N, CU, Culiacán de Rosales 80013, Mexico;Instituto de Ingeniería, Universidad Nacional Autónoma de México, Av. Universidad 3000, CU, Ciudad de México 04510, Mexico;

关键词: infill wall;    joint reinforcement;    infilled frame;    seismic behavior;    RC frame structure;   

DOI  :  10.3390/buildings12030259

来源: DOAJ

【 摘 要 】

The results of an experimental study of four infilled frames with brick masonry walls subject to reversal cyclic lateral load are presented. The variables studied were the height to length aspect ratio of the wall and the use of joint reinforcement. The investigation was motivated by the fact that the Mexican code establishes the same specifications about the use of joint reinforcement for infill walls as for confined walls, because there is not enough experimental evidence on joint reinforced infill walls. To investigate the possible interaction of the study variables in the seismic performance of the walls, two pairs of specimens, scaled 1:2, with different aspect ratios (H/L = 0.75, 0.41) were tested. The specimens in each pair were identical except that one of them included steel bars into the bed-joints as reinforcement leading to amount $p_h{f}_{yh}=0.6 \mathrm{MPa}$. The infill walls with H/L = 0.41 were included from a previous study. The behavior of the specimens was defined in terms of lateral strength, ductility, displacement capacity, deformation of the joint reinforcement and crack pattern. The results indicate that joint reinforcement increases the strength of the system; however, the increase was more pronounced in longer walls. Ductility was reduced with horizontal reinforcement and this behavior was more important for longer walls. As occurred in confined walls, the joint reinforcement generates a more distributed cracking and reduces the width of the cracks. The experiments are described and this and other results are discussed in detail.

【 授权许可】

Unknown