Seismic behavior of a precast hollow core wall under biaxial lateral cyclic loading

Abstract

The seismic performance of two geometrically similar precast concrete hollow core walls are investigated experimentally under biaxial lateral cyclic loading. Two wall specimens are detailed with steel-armouring at their base-to-foundation interfaces including supplementary unbonded post-tensioned prestress, fuse-bars and mechanical energy dissipators. Wall 1, with a fixed location of bonded fusebars and unbonded tendons, is tested under various biaxial load paths including "4-leaf clover" and "double 4-leaf clover" patterns. Wall 2 is similarly tested with two different configurations of unbonded tendons, unbonded fuse-bars and steel mechanical energy dissipators. A shaking table is used in slow motion to perform the reversed cyclic in-plane and out-of-plane bi-lateral quasi-static experiments. Test results show that both walls perform very well under various load paths without any discernible structural damage up to 2.0% wall drifts. It is concluded that for initial design equivalent viscous damping of 10% may be adopted to accommodate the effects of hysteretic behaviour.

Hysteretic Response of Tilt-Up Concrete Precast Walls with Embedded Steel Plate Connections

“…Precast concrete wall panels typically have weak planes because the panels are relatively thin, and so their design is a critical consideration in determining the strength, stability, and integrity of the building in which they are used. Specifically, the seismic behavior of a precast sandwich panel structure depends significantly on the connection between the wall panel system and the foundation [1][2][3][4]. However, current design codes do not address the seismic design of precast sandwich panel connections.…”

Seismic Performance of Insulated Sandwich Wall Panel Subjected to Lateral Cyclic Loading

“…However, there exists fundamental question whether this structure could resist lateral forces in the event of earthquake or not. Previous study has shown that RC structure experienced brittle mode failure when tested under lateral cyclic loading using British Standard (BS 8110) [2,3]. Unlike the gravity load and the wind load, seismic force is generated by the dynamic movement of the structure as it vibrates.…”