RECONSTRUCTED MULTISTORY BUILDING Russian patent published in 2005 - IPC

FIELD: construction, particularly to reconstruct residential and public buildings and architectural masterpieces.

SUBSTANCE: load-bearing system of the building is made as partial building frame with columns located in building center and rested upon existent strip foundations by monolithic reinforced concrete bases of the columns. The building frame is provided with flat floor structures supported by the columns in building center and by outer walls along floor structure peripheries with the use of monolithic reinforced concrete dowels and/or by means of floor structure cantilevers. The dowels are integrally formed with floor structures during mounting thereof and located in recesses for supporting demounted floor structures. The cantilevers extend beyond outer walls and pass through openings of building walls. The cantilevers are adapted for balconies or other additional building structures arrangement. The frame may be formed of composite reinforced concrete members. Each floor structure is composed of composite hollow-core slabs with opened cavities located along their perimeters. The slabs are united into groups along sides thereof by interslab joints. Each group extends in floor structure plane and is located in closed reinforced concrete frame defined by load-bearing and tying cross-bars connected in frame corners and concealed in floor structure plane. Hollow-core slab ends rest upon load-bearing cross-bars through reinforced concrete dowels integrally formed with them and arranged in opened cavities of the hollow-core slabs. All floor structure is provided with monolithic reinforced concrete wall cross-bars installed along structure perimeter and having reinforced concrete dowels on outer faces thereof extending through the full floor structure thickness. The above dowels are located in wall depressions. Cantilevers of floor structures passing beyond the walls are made in through openings thereof on extensions of load-bearing or tie cross-bars and support hollow-core slabs through monolithic reinforced concrete dowels. Partial building frame may be constructed of monolithic reinforced concrete and have flat floor structures made as integrated slab inside building. Cantilevers of the floor structures formed as separate bars integrally formed with the slab may pass through outer wall openings. The bars are connected one to another from outside by flat slab. Column base in multistory building to be reconstructed may be formed as monolithic reinforced concrete raft with thickness increasing from column to strip foundation edges and supported by strip foundation ledges in central part thereof and by adjoining reinforced ground base in end parts. Additional building stories are provided with outer walls lying in plane with existent ones, floor structures supported by outer walls along the perimeter thereof and by columns in building center. Additional stories may be constructed of single-layer walls of cellular concrete block work. Reinforcing structure with decorative coating is formed on outer surfaces of existent outer building walls. Upper building story is made as a half-story.

EFFECT: reduced specific material consumption, maximum possible retention of old structures and pre-existing architectural building appearance along with increased building quality.

6 cl, 12 dwg