Two-Way Flexural Behavior of Donut-Type Voided Slabs

被引：0

作者：

Joo-Hong Chung

Hyung-Suk Jung

Baek-il Bae

Chang-Sik Choi

Hyun-Ki Choi

机构：

[1] Hanyang University,Research Institute of Industrial Science

[2] Catholic Kwandong University,Department of Architectural Engineering

[3] Hanyang University,Division of Architectural Engineering

[4] Kyungnam University,Department of Fire and Disaster Prevention Engineering

来源：

International Journal of Concrete Structures and Materials | 2018年 / 12卷

关键词：

voided slab; two-way flexural behavior; experimental investigation and load distribution;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Voided slab systems were developed using segmented void formers such as spherical or oval plastic balls for two-way slab applications. This type of slab is expected to behave like a general two-way reinforced concrete slab because it has segmented voids, rather than the continuous voids of hollow core slabs. However, the structural behaviors of two-way voided slabs with segmented voids have not been clearly verified. Therefore, this paper analyzes the possibility of applying a donut-type two-way voided slab, which was investigated with a 12-point two-way bending test focused on global behaviors, including its load bearing capacity, flexural stiffness, ductility, deflection, and load distribution. In addition, the design method of a donut-type two-way voided slab was reviewed through the yield line method. The test results showed that one donut-type two-way voided slab acted like a conventional two-way reinforced concrete slab with the load distributed evenly between the different directions; however, another donut-type two-way voided slab with different characteristics showed uneven load distribution with different crack patterns. In addition, the yield line method could predict the load bearing capacities of the donut-type voided slabs with approximately 95% accuracy.

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