Cyclic Behaviour of Exterior Precast Concrete Beam To Beam Connections

Abstract eng:
The present study investigates the behavior of dry joint connection between beam elements of precast concrete under reverse cyclic loading. A one-third scale model was adopted for the reference monolithic and precast specimens. The reverse cyclic loading was applied as displacement-controlled lateral loading at the end of the beam. The column was hinged at the bottom and laterally restrained at the top. The precast beam to beam connections were made using stud nuts. In the first stud nut connection (SD1), the stud nut was connected at a distance of 350 mm at top and 250 mm at bottom from the column face. In the second stud nut connection (SD2), the stud nut was connected at a distance of 250 mm at top and 150 mm at bottom from the column face. The test results of the precast specimens have been compared with that of the reference monolithic connection (ML). Various parameters like ultimate load carrying capacity, load-displacement hysteretic behavior, crack pattern, energy dissipation and ductility were observed for the precast specimens and compared with the monolithic specimens. Out of the two precast connections, stud nut connection (SD2) performed better. The precast connections in general showed comparable behavior in terms of ductility. But the monolithic specimen was found to perform better when compared to the precast specimens in terms of strength and energy dissipation.

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