DESIGN OF DOUBLE BASEMENT SHOPPING COMPLEX USING POST TENSIONED SLAB

Abstract

Nowadays, design of modern an architectural building structure requires the use of slender and free from numerous supports slabs. The most suitable solution for above requirements is the post-tensioned slabs with unbounded tendons. Slabs prestressed by unbounded tendons are successfully used worldwide for several decades. During that time many recommendations dealing with the forming of geometry and prestressing, dimensioning and erection technology were issued. During the recent years prestressed slabs characterized by span and slenderness substantially exceeding recommended limitations were designed and erected with success in Poland. During the slabs erection and in two years of their using, the deflection of three oversized slabs was monitoring. In spite of designed the slabs significantly larger and slenderer than the recommended maximum value of span and span to depth ratio, the deflection of the slabs is definitely far from the limit value. The paper shows the design of the structure and detailing of the PT slab. The slab length is 17.5 m.