Abstract：Considering the problem that prestressing tendons in two-way slabs can not be arranged and tensioned in two ways, a design idea that prestressing tendons in two-way slabs are arranged and tensioned in one way is presented. Some design points are given including the calculation of carrying capacity and prestress effects, and the checking computations of crack and deformation. The analysis is performed for a two-way slab simply supported at four sides with one-way arrangement of prestressing tendons. The influences of arrangement types of prestressing tendons to its ultimate loads, distribution of primary moment and secondary moment, crack and deformation are discussed. The results show that when the total number is constant, the more prestressing tendons are arranged in center strip, the better it is for slabs.
2008, Vol. 29 
