A Study On The Ultimate Bearing Capacity Of A Assembled Monolithic Concrete Slab Floor

This paper mainly discussed one type of two-way superposed slab floor with prestress in one way. The lower layer of the superposed floor is precast-prestressed sandwich slab, and the upper layer is cast-in-situ concrete. Reinforcements set in the precast slabs lapped with each other at the side of it. In this way, the floor stand loads in two ways. Adopting unbond prestress improve mechanical behavior of the superposed floor.The detail procedures of the loading test on the ultimate bearing capacity under different load cases and the author's first-hand experience during the tests are documented in the paper.Based on the experimental performance, it has been verified that the superposed floor assembled by the precast-prestressed sandwich slab working under the design and the reliability of the lateral connecting character of the slab.To explain the experimental results in quantitative terms, a theoretical model of the 6m X 12m continuous floor was developed based on the cross-beam finite element method. Considering the concrete cracking, the bent rigidity was corrected in terms of Code for Design of Concrete Structures(GB50010-2002). With the receivable deviation in engineering, the calculated deformations and the ultimate capacities calculated by the formula of Code are shown to be in satisfying agreement with the experimental results.In addition, the structural form, character and the construction technology of the prestress floor were studied.Finally, the paper made a economic analysis of the floor by comparison with other plan.