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Advances in Concrete Construction
  Volume 9, Number 5, May 2020 , pages 437-448

Influence of connection detailing on the performance of wall-to-wall vertical connections under cyclic loading
S. Hemamalini and R. Vidjeapriya

    In high rise buildings that utilize precast large panel system for construction, the shear wall provides strength and stiffness during earthquakes. The performance of a wall panel system depends mainly on the type of connection used to transfer the forces from one wall element to another wall element. This paper presents an experimental investigation on different types of construction detailing of the precast wall to wall vertical connections under reverse cyclic loading. One of the commonly used connections in India to connect wall to wall panel is the loop bar connection. Hence for this study, three types of wet connections and one type of dry connection namely: Staggered loop bar connection, Equally spaced loop bar connection, U-Hook connection, and Channel connection respectively were used to connect the precast walls. One third scale model of the wall was used for this study. The main objective of the experimental work is to evaluate the performance of the wall to wall connections in terms of hysteretic behaviour, ultimate load carrying capacity, energy dissipation capacity, stiffness degradation, ductility, viscous damping ratio, and crack pattern. All the connections exhibited similar load carrying capacity. The U-Hook connection exhibited higher ductility and energy dissipation when compared to the other three connections.
Key Words
    precast concrete; wall to wall; wet connections; dry connections; reverse cyclic loading
S. Hemamalini and R. Vidjeapriya: College of Engineering, Guindy, Anna University, Chennai, India

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