Statistical Evaluation of Minimum Thickness Provisions for Slab Deflection Control

Bertero, Raúl D.; Bertero, Agustin

doi:10.14359/51706926

Cited by 11 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Kheyroddin and Maleki [15] proposed a new equation of the effective moment of inertia of FRP-steel RC beams using Branson's formula. Bertero and Bertero [16] evaluated the accuracy of Branson and Bischoff equations for the minimum deflection of two-way slabs. Bischoff [17] calculated the deflection of tilt-up concrete wall panels under service load.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Shear Effect on Deflection of RC Beams

2021

View full text Add to dashboard Cite

This study evaluates the effect of shear on the deflection of reinforced concrete (RC) beams subjected to combined bending and shear. A total of nine simply supported beams were manufactured with the shear span-to-depth ratio, tension steel ratio, and shear capacity ratio as test variables. The experimental results were used to evaluate the effect of shear on the deflection by separating them into flexural and shear deformations. The theoretical deflection of the specimens was calculated using the effective moment of inertia equation recommended by ACI 318-19 based on the curvature relationships and experimental results of the flexure critical beams. By comparing the experimental and analytical results, it was revealed that the deflection obtained using the ACI equation underestimated the experimental results by up to about 1.6 times when the shear effect was large.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaluation of Shear Effect on Deflection of RC Beams

2021

View full text Add to dashboard Cite

show abstract

“…As an alternative to complicated deflection calculations, design codes introduce deflection control rules based on limiting the span-to-thinkness ratio of the slab. The span-tothickness ratio method is the most popular approach whereby serviceability requirements are deemed satisfactory if a required minimum thickness is provided to the slab [25,26].…”

Section: Introductionmentioning

confidence: 99%

Vibration Performance of Flat Plate Concrete Floors With Codified Minimum Thickness

Nguyen¹

2022

GEOMATE

View full text Add to dashboard Cite

Limiting vibrations to ensure occupant comfort is a serviceability requirement that should be considered in the design of floor systems. Current concrete design codes do not explicitly address the issue of vibrations when providing guidelines for calculation of the slab thickness of a flat plate floor. Concrete codes have introduced several methods of determination of the slab thickness or span-to-thickness ratio on the basis of deflection control. The objective of this article is to investigate to what extent a flat plate floor with codified minimum thickness would meet the requirement for walking-induced vibration control. The modal properties of flat plate floors spanning 6-9 m were determined and the 90th percentile velocity response to walking excitation was calculated using probability-based design charts developed by a European guideline on floor vibrations. For deflection control, on average the floor designed following the European concrete code was 6% thinner than the floor designed using the American concrete code and 34% thinner than the floor designed according to the Australian concrete code. It was interestingly found that the vibration of a floor that was dimensioned for deflection control as per any of the three concrete design codes well met the acceptance criteria for human comfort in office buildings, residential buildings, hotels and schools. In addition, the vibration of a 9-m-span floor whose slab thickness was determined using the Australian concrete code provisions could even be acceptable for critical areas.

show abstract

“…Regarding deflection control, several methodologies were proposed to estimate the deflection of RC beams [3,4] and slabs [5], depending mainly on the loading, quantity of reinforcement, geometry, creep and shrinkage. However, a simplified method based on the span-to-depth (or slenderness) ratio limit was developed.…”

Section: Introductionmentioning

confidence: 99%