Title: Analysis of out-of-plane performance
of composite slab with precast concrete
ribbed panels under a hanging load
Date Published: September - October 2019
Volume: 64
Issue: 5
Page Numbers: 43 - 57
Authors: Jingshu Zhang, Binyang Liu, Binbin Han, Yongsong Ni, and Zhenlong Li
https://doi.org/10.15554/pcij64.5-02
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Abstract
When studying the out-of-plane performance of a
composite slab, distributing the load on the top slab
surface may overestimate the integrity of the combined interface and result in unsafe shear capacity
because the load path is from the top surface to the
bottom of the slab. It is difficult to observe cracking
and crack distribution on the top surface of the slab
during load application. In this paper, a static hanging
load test of a two-span, two-way composite slab with
precast concrete ribbed panels (CSPRP) was conducted. The hanging loading conditions were achieved
by constructing loading frames and connecting the
frames to a series of inverted U-shaped cables, which
were suspended from the ribs of the precast concrete
ribbed panels.
After the cast-in-place concrete topping achieved its
design strength, concrete blocks were placed in the
loading frame to load the CSPRP. A comparative
test of a two-span, two-way cast-in-place concrete
slab was conducted at the same time, under the same
conditions. The results showed that CSPRPs and cast-in-place concrete slabs exhibited comparable performance. The stiffness and crack resistance of CSPRPs
were similar to those of cast-in-place concrete slabs.
The mechanical properties of the combined interface
of the CSPRP was compared with a common flat-plate composite slab. The results showed that the
shear behavior on the combined interface of CSPRPs
meets the shear strength requirements under serviceable working conditions better than common flat-plate
composite slabs. The combined interface of CSPRPs
will not disengage under service loads.