INVESTIGATION OF FLEXURAL BEHAVIORS OF BIAXIAL VOIDED SLABS WITH ELLIPSOIDAL BALLS AND STEEL CAGES

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AMOUSHAHI M.; ZEYNALIAN M.; HASHEMI M.; MOSTOFINEJAD D.; FARAHBOD F.; ASADOLLAHI H.

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Journal Paper

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Journal: Sharif Journal of Civil Engineering Year:2020 | Volume:36-2 | Issue:3/2 Page(s): 29-37

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Title

INVESTIGATION OF FLEXURAL BEHAVIORS OF BIAXIAL VOIDED SLABS WITH ELLIPSOIDAL BALLS AND STEEL CAGES

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Keywords

Biaxial voided slab

flat slab

flexural behavior

ellipsoidal void

steel cage

Abstract

A wide variety of systems have been introduced so far for the construction of roofs, as one of the most essential structural components of buildings. A conventional roofing system is the solid slab that offers adequate rigidity to distribute gravitational and seismic loads, while it is also relatively resistant against fire. However, its main drawback is its overweight that increases the associated seismic loads. To resolve this problem, modifications were proposed that resulted in different types of Biaxial voided slabs. In one such system, spherical and ellipsoidal plastic balls enclosed in steel cages were used to eliminate ineffective concrete. Due to the novelty of the system, however, little was known about the bending behavior of the roof thus constructed. Most of previous studies have been conducted on spherically-shaped voids ignoring ellipsoidal ones. This is while the effect of supporting cages on voids has not been investigated at all. The present study was, therefore, designed and implemented to study the behavior of Biaxial voided slabs containing ellipsoidal plastic balls and the effect of supporting cages on bending behavior. To investigate these aspects of the system, two full-scale bending specimens were cast for investigating bending capacity, cracking distribution, and deflection in solid and Biaxial voided slabs. Moreover, the effect of cage longitudinal rods was studied on the ultimate capacity of the bending specimens. Finally, the experimental results were then examined by ACI 318-14 recommendations to put forth suggestions for using the ACI 318-14 equations in designing Biaxial voided slabs. It was found that while both solid and biaxial voided specimens exhibited almost similar bending behavior and the same failure mode. Also, the bending behavior of biaxial voided specimen was affected by the steel cages used. So, to use the ACI 318-14 equations, if this longitudinal cage bar is considered, the percentage difference between experimental and calculated results reached just one percent.

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APA: Copy

AMOUSHAHI, M., ZEYNALIAN, M., HASHEMI, M., MOSTOFINEJAD, D., FARAHBOD, F., & ASADOLLAHI, H.. (2020). INVESTIGATION OF FLEXURAL BEHAVIORS OF BIAXIAL VOIDED SLABS WITH ELLIPSOIDAL BALLS AND STEEL CAGES. SHARIF: CIVIL ENINEERING, 36-2(3/2 ), 29-37. SID. https://sid.ir/paper/962111/en

Vancouver: Copy

AMOUSHAHI M., ZEYNALIAN M., HASHEMI M., MOSTOFINEJAD D., FARAHBOD F., ASADOLLAHI H.. INVESTIGATION OF FLEXURAL BEHAVIORS OF BIAXIAL VOIDED SLABS WITH ELLIPSOIDAL BALLS AND STEEL CAGES. SHARIF: CIVIL ENINEERING[Internet]. 2020;36-2(3/2 ):29-37. Available from: https://sid.ir/paper/962111/en

IEEE: Copy

M. AMOUSHAHI, M. ZEYNALIAN, M. HASHEMI, D. MOSTOFINEJAD, F. FARAHBOD, and H. ASADOLLAHI, “INVESTIGATION OF FLEXURAL BEHAVIORS OF BIAXIAL VOIDED SLABS WITH ELLIPSOIDAL BALLS AND STEEL CAGES,” SHARIF: CIVIL ENINEERING, vol. 36-2, no. 3/2 , pp. 29–37, 2020, [Online]. Available: https://sid.ir/paper/962111/en

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