Title:
Behavior and Strength of CIP-PCP Slabs with High-Strength Reinforcing Bars (Prepublished)
Author(s):
Yongjae Yu; Dagoberto Garza; Elias I. Saqan, and Oguzhan Bayrak
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
CIP-PCP slabs; crack control; crack width; high-strength reinforcing bar; serviceability
DOI:
10.14359/51749174
Date:
9/11/2025
Abstract:
Several studies have revealed that slabs with cast-in-place over precast, prestressed panels (CIP-PCP) behave differently from traditional concrete slabs because of the panel joints between the PCP components. While high-strength reinforcing bars can improve load capacity or reduce reinforcing bar quantity in traditional slabs, limited research has focused on their application in CIP-PCP slabs. This study addressed this gap by conducting four-point bending tests on CIP-PCP slabs with normal- and high-strength reinforcing bars. Two configurations of high-strength steel were used: one with the same reinforcing bar layout as normal-strength reinforcing bars and another with increased reinforcing bar spacing to reduce the reinforcing bar quantity. Additionally, slab specimens were designed to replicate real-world bridge deck conditions, including longitudinal and transverse joints, for detailed analysis. The results indicated that reducing reinforcing bar quantity by adjusting reinforcing bar spacing based on the specified yield strength ratio between normal- and high-strength steels maintained a comparable load capacity, with crack widths magnitude similar to those in normal-strength steel layout in the service state.