Title: Cyclic behavior of hollow-core diaphragm subassemblies
Date Published: March - April 2019
Volume: 64
Issue: 2
Page Numbers: 80 - 96
Authors: Nelson M. Angel, Juan F. Correal, and José I. Restrepo
https://doi.org/10.15554/pcij64.2-02
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Abstract
This paper highlights the results of the experimental
phase of a comprehensive research project on the
seismic performance of hollow-core diaphragms. The
four specimens tested resembled a subdiaphragm region
framed by beams. Variations in the boundary conditions of the hollow-core slabs and the inclusion of a cast-inplace
concrete topping slab were considered. A bidirectional
test fixture was used for simultaneous control of
in-plane lateral load and bending deformations. Global
and local behaviors were examined under a sequence
of increasing cyclic demands. Untopped hollow-core
diaphragm specimens exhibited stable behavior that was
influenced by shear strength along longitudinal joints
and a bearing mechanism that developed between the
hollow-core slabs and the supporting beams. The performance
of the topped specimen was affected by localized
damage to the cast-in-place concrete topping and large
demands on the welded-wire mesh reinforcement.