|
Title |
Effect of Void Former on Flexural Behavior of Semi-Precast Lightweight Aggregate Concrete One-Way Slab with Micro-Steel Fibers
|
|
DOI |
https://doi.org/10.4334/JKCI.2025.37.2.165 |
|
Keywords |
하프 프리캐스트 일방향 슬래브; 휨 거동; 경량골재 콘크리트; 마이크로 강섬유 half precast concrete one-way slab; flexural behavior; lightweight aggregate concrete; micro-steel fiber |
|
Abstract |
The objective of this study is to examine the effect of void formers on the flexural behavior of semi-precast concreteone-way slabs using lightweight aggregate concrete with micro-steel fiber (SPCS_FLWC). The main parameters are the type oflongitudinal reinforcement and the presence or absence of void formers. Four simply supported SPCS_FLWC specimens wereprepared and tested under a top two-point load. Test results showed that although the SPCS_FLWC specimens were made oflightweight aggregate concrete, which has lower flexural crack resistance performance than normal-weight concrete and incorporatingvoid formers, their first cracking moment and maximum moment of the SPCS_FLWC specimens were higher than the valuespredicted by KDS 14 20. However, specimens with void formers exhibited brittle post-peak behavior in the load?deflectionrelationship, due to horizontal cracks at the interface between the upper SPC slab and the lower topping concrete. This resulted in alower displacement ductility ratio. Furthermore, the displacement ductility ratio was lower than the value predicted by the nonlinearanalysis procedures proposed by Yang et al.
|