FIRE TEST DESIGN OF FOUR-EDGE FIXED LARGE FULL-SCALE TWO-WAY REINFORCED CONCRETE SLABS AND THERE INSTALLATION UNDER EXTREMELY NARROW SPACE

In the present study,the fire test design of two large full-scale two-way reinforced concrete slabs being fixed at four edges and their installation under extremely narrow space were investigated.Firstly,the choosing of materials,concrete cover thickness,specimen dimensions and the calculating of internal forces and reinforced details at every working conditions were discussed;the internal forces of four-point supported slab with cantilever edges were also analyzed by ANSYS.Secondly,the process of installing the large full-scale specimen under extremely narrow space and insufficient capacity of bridge crane were illustrated in detail.Finally,the methods of simulating the slab supported at four fixed edges were introduced.The results showed that all working conditions should be taken into account while in the specimen design.The analyses by ANSYS indicated that the internal forces of the slab supported at four points were mainly focused on the four points and the lines passed them.The site and the capacity of the hoisting equipments should be considered in the design of large specimens.When there is no sufficient horizontal space in ground,the specimen can be lifted up firstly,so there is sufficient horizontal space on the lifted-up plane for installation.