The development of interlocking models of lightweight bricks and shear failure assessment of its wall structures

• Published in: IOP conference series. Materials Science and Engineering 2021-02, Vol.1073 (1), p.12021
• Main Authors: Rochman, T, Rasidi, N, Aditya, Y
• Format: Article
• Language: English
• Subjects: Bricks; Building components; Columns (structural); Compressive strength; Cyclic loads; Deflection; Earthquake damage; Earthquake loads; Lightweight; Load; Locking; Model testing; Modelling; Redevelopment; Reinforced concrete; Shear strength; Shear tests; Specific gravity; Stiffness; Strength testing; Structural damage; Taguchi methods
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/1073/1/012021

In this paper the development of interlocking models of lightweight bricks is proposed and its shear failure assessment in wall structures has been studied. Walls are a brittle infill structures and quiet vulnerable to collapse compared among all building components when a strong earthquake occurs. An interlocking system approach is such a simple method that is proposed to make sure the wall behave keep strong and stiff during seismic load. This research was performed to improve the shear capability and modelling of lightweight brick as well, which is interlocked each other. The data from the specific gravity testing results and its compressive strength then inputted as one of the modelling parameters. An experiment was carried out utilizing the Taguchi method to find out the optimum mixture used in shear testing in medium scale of walls. The compressive strength and shear strength testing methods follow the Indonesian code of SNI 03-1974-1990 and ASTM E2126-2011. The cube specimens of 15x15x15cm were used for compressive experiments, while a set of wall structures of 100x100 cm that was surrounded by reinforced concrete practical frame of columns and beams of 13x13 cm was used as shear test specimens. From shear testing results that using cyclic loads, it was found that the system can resist a maximum load of 45 kN by a lateral deflection of 45 mm. The results also obtained elastic stiffness of 2.55 kN / mm, the yielding behaviour occurs at the load, lateral deflection, ductility factor Δf/Δy and shear strength of 38.25 kN, 14,961 mm, 2.61 and 35,714 kN / mm respectively, which means that each width of 1 mm wall can be resist a shear load of 35,714 kN. It can be simply concluded that in cyclic shear loads, the more the wall is getting damaged or cracked, the structural stiffness will decreased as shown in a hysteresis behaviour.