Seismic Behavior Of A Precast Hollow Core Wall
Under Biaxial Lateral Cyclic Loading
Author(s)
N. H. Hamid & K. D. Ghani
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.
Keywords: bi-lateral loading, steel-armouring, fuse-bars, unbonded posttensioned
tendons, equivalent viscous damping, mechanical energy dissipators.
Keywords
bi-lateral loading, steel-armouring, fuse-bars, unbonded posttensioned
tendons, equivalent viscous damping, mechanical energy dissipators
Related Book
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