American Society of Civil Engineers


Deflection Control of Two-Way Reinforced Concrete Slabs


by Shyh-Jiann Hwang, A.M.ASCE, (Assoc. Prof., Dept. of Ctr. Engrg., Nat. Taiwan Inst. of Technol., Taipei, 10672, Taiwan) and Kuan-Yung Chang, (Lect., Dept. of Civ. Engrg., Nat. Taipei Inst. of Technol., Taipei, 10643, Taiwan; also, Grad. Student, Dept. of Ctr. Engrg., Nat. Taiwan Inst. of Technol., Taipei, 10672, Taiwan)

Journal of Structural Engineering, Vol. 122, No. 2, February 1996, pp. 160-168, (doi:  http://dx.doi.org/10.1061/(ASCE)0733-9445(1996)122:2(160))

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Document type: Journal Paper
Abstract: Limitation of midpanel deflection is an essential performance design of two-way slab systems. Two alternative design procedures for deflection control are presented in this paper. One procedure with fewer parameters is written in a format of the minimum thickness requirements. The other, allowing more flexibility in choices, involves the direct calculation of midpanel deflections. Both procedures suggested herein are simple; however, various factors influencing deflections of two-way slab systems (i.e., loading intensity, slab geometrical configuration, material properties, cracking phenomenon, slab discontinuity, long-term effects, and allowable deflection limits) are also considered. The techniques are provided with illustrative examples as well as comparisons with both the available experimental data and ACI 318-89 being made.


ASCE Subject Headings:
Deflection
Design
Loads
Reinforced concrete
Slabs
Standards and codes