New design decisions of prefabricated girderless floors of multi-storeyed buildings

Abstract

Abstract. Nowadays new trends are clearly manifested in building structures for buildings of various appointment and specific characteristics of their long-term operation. The priority in the construction industry takes place construction of high-rise residential and office buildings. Numerous studies in Ukraine and abroad proved that the construction of the frame with girderless floor provides resistance to both vertical and horizontal loads. It makes it possible to improve the traditional methods of frame building design. However, in the monolithic building of girderless floors there are a number of unresolved problems of structural, technological and organizational character. The authors have developed the construction of prefabricate reinforced concrete girderless floor that includes column drops, intercolumn slabs, span slabs. Column drops have bevelled lateral edges around the perimeter, forming a platform to support intercolumn slabs. Mounting of slabs occurs in the definite order. In the capacity of the columns it can be used as traditional prefabricated reinforced concrete structures as concrete filled steel tube ones. The advantage is that, comparing to modern reinforced concrete girderless floor, additional supporting equipment is not used during mounting slabs and scaffolding. The proposed girderless floors can be recommended for use in the construction of residential and public buildings for various purposes.

Experimantal Researches of the Current Burdening Course Plates Achievements

“…The system of beamless overlapping with modified multi-hollow plates [2,3], designed by the authors, is able to provide optimum due to the plates layout joints total length and strength and does not require large material and labour costs for the installation and replacement of joints between individual plates. This is achieved by the fact that precast, intercolumnar and span slabs are used in precast concrete precast slabs, with slabs along the perimeter having sloping lateral faces forming a platform for supporting adjacent slabs [4]. The overall stiffness of the flooring is achieved by welding together the mortgages that are pre-seen on all slabs.…”

Structural solution of the horizontal joint of floor slabs in girderless frame

“…Attempts are being made to create durable, suitable for normal function, strong and technological joints [9], which will have a positive impact on the overall stability of precast concrete buildings [10]. In [11], for example, a new solution for the joints of a column and a plate in a girderless frame is proposed, which simplifies technological operations and optimizes the stress-strain state of the joint and the frame as a whole.…”