SUGGESTING DEFLECTION EXPRESSIONS FOR RC 2-WAY SLABS

The purpose of the experimental work presented in this study is to study the effect of concrete compressive strength and steel reinforcement ratio on capacity and deflection of reinforced concrete two-way slabs. Three steel reinforcement ratios are considered which are minimum, maximum and average of them in addition to two concrete compressive strength
values of 20 and 30 MPa. The results from experimental work show that increasing the reinforcing steel ratio leads to increase the ultimate capacity of the slab in addition to decrease the maximum deflection. For slabs with
= 20 MPa, increasing the reinforcing steel ratio from the minimum to the maximum, i.e. 600 %, leads to increase ultimate capacity by about 156 % and decrease maximum deflection by about 52 %. Wheras, For slabs with
= 30 MPa, increasing the reinforcing steel ratio from the minimum to the maximum, i.e. 900 %, leads to increase ultimate capacity by about 155 % and decrease maximum central deflection by about 27 %. In addition, matmatical expresions for load-deflection relationships are presented in the current study.