Abstract
In this paper, the method to calculate strength and deflection of a reinforced concrete one-way slab with a varying compressive membrane force due to lateral restraint was developed, and sixteen reinforced concrete one-way slab (wide flat beams) have been tested to confirm the accuracy of solution obtained from the equation, and the effect of span depth ratio and the rigidity of lateral restraint was discussed. The results obtained may be summarised as follows. 1) The compressive membrane force caused in one-way slab with lateral restraint was measured. 2) It became evident that the membrane force changed as deflection increase. 3) Load-deflection diagrams of one-way slabs with the compressive membrane force showed a very similar characteristic of columns, concavo-convex shape. 4) The arching effect due to the compressive membrane force became larger as span depth ratio decreased. 5) Ultimate load and deflection could be calculated in considerable accuracy using the equations proposed by author.
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