| Title |
Evaluation on Construction Load Behavior of Half Precast One-Way Slab using Lightweight Aggregate Concrete |
| Authors |
권희용(Kwon, Hee-Yong) ; 양근혁(Yang, Keun-Hyuk) ; 이혜진(Lee, Hye-Jin) ; 이연정(Lee, Yeon-Jung) |
| DOI |
https://doi.org/10.5659/JAIK.2023.39.10.263 |
| Keywords |
Half PC one-way slab; Lightweight aggregate concrete; Construction load; Flexure |
| Abstract |
This study aims to assess the crack resistance and deflection control of half precast lightweight aggregate concrete one-way slabs when
subjected to construction loads. The main parameters under consideration were the arrangement of tensile reinforcing bars and the use of
micro-steel fibers. The flexural behavior of these slab specimens was assessed under a concentrated top two-point load. The results revealed
that all slab specimens ultimately failed due to the concrete crushing in the compression zone, caused by the rapid propagation of flexural
cracks. Notably, the flexural crack capacity of half precast one-way slabs reinforced with micro-steel fibers was approximately 2.04 times
higher than the moment requirements for construction loads, as calculated by KDS 21 50. Although the moment of inertia for all slab
specimens was roughly 15.0% lower than the effective moment of inertia at the limit deflection, as calculated by KDS 14 20, the disparity
between the experimental and calculated values diminished as deflection increased. In summary, incorporating micro-steel fibers and
prestressing into the half precast slabs increased their flexural crack resistance and stiffness, thereby improving safety against construction
loads. |