VIBRIZOLATED FOUNDATION OF INDUSTRIAL BUILDING Russian patent published in 2018 - IPC E02D27/34 E04H9/02 

FIELD: construction.

SUBSTANCE: invention relates to foundations of buildings and structures in seismically dangerous regions. Vibration-insulated foundation of a production building contains the frame of a building with a base, bearing walls with fences in the form of a floor and a ceiling, which are lined with sound-absorbing structures, window and door openings, as well as piece sound absorbers, containing a frame in which the sound-absorbing material is located, and installed above the noisy equipment. Base load-bearing slabs are equipped in the places of their fixation to the bearing walls of the building with a system of spatial vibration isolation consisting of horizontally located vibration isolators, perceiving vertical static and dynamic loads, as well as vertical vibration isolators receiving horizontal static and dynamic loads. Floor in rooms is made on elastic base and comprises mounting plate, made of reinforced vibration damping concrete material, which is set on the base plate of an inter-floor bridging with cavities through layers of vibro-damping material and hydro-insulating material with a gap relative to bearing walls of the shop. Cavities of the base plate are filled with vibration damping material, for example, foamed polymer. Elastic base of the floor is made of a rigid porous vibration-absorbing material, for example an elastomer or polyurethane, with a degree of porosity in the range of optimum values: 30÷45 %, or from needle-punched mats of “Vibrosil” type on the basis of silica or aluminoborosilicate fiber, or from hard vibration damping materials, for example a plastic, or from soundproofing plates on the basis of a glass staple fiber of the type “Noisy” with a material density of 60÷80 kg/m³. Ceiling is made of acoustic hanging, consisting of a rigid frame suspended from the ceiling of a production building with sound absorbing material inside the frame, wrapped with acoustically transparent material, and a perforated sheet is attached to the frame, the frame being formed in the form of a rectangular parallelepiped with the dimensions of the sides in plan B×C, ratio of which lies in the optimal range of values B:C = 1: 1…2:1, and the optimal size ratios must also be observed: D – from the suspension point of the frame to either side of it and E is the thickness of the layer of sound absorbing material, the ratio of these dimensions being in the optimum range of values: E:D = 0.1…0.5, and in a skeleton fixtures are established. Perforated sheet of a false ceiling has the following perforation parameters: perforation diameter – 3…7 mm, percent perforation 10…15 %. Base of the building frame is made with vibration isolation of the reinforced concrete slab, which consists of interconnected reinforced concrete beams in the base of the building, which includes at least four vibration isolators installed between the metal plate and a reinforced concrete beam located at the base of the building, made in one piece with at least eight ribbon foundation blocks, which are peculiar “traps”. Each of the metal plates is installed on at least three concrete pillars-stops, and between each ribbon foundation blocks and each of the reinforced concrete beams are installed sand pads, and under the vibration isolators are fixed strain gauges, which control the draft of the vibration isolators. Sand pads are installed in metal detachable clips. Each of the vibration isolators consists of rigidly interconnected rubber plates: the upper and lower, in which through holes are made, located on the surface of the vibration isolator in staggered order, and in the form of vibration isolators are made square or rectangular, and their lateral faces are made in the form of curved surfaces of the n-th order, providing an equal frequency of the vibration isolation system as a whole, herewith the holes have a shape providing equifrequency of the vibration isolator. Each of the vibration isolators consists of a base, an elastic mesh element and washers interacting with the bushings, the base being in the form of a plate with fastening holes, and mesh elastic element with its lower part rests on the base and is fixed by the lower washer, rigidly connected to the base, and upper part is fixed by an upper pressure washer, rigidly connected to a centrally located ring, enclosed by a coaxially arranged ring rigidly connected to the base. Density of the mesh structure of the elastic mesh element is in the optimal range of values: 1.2 g/cm³ ÷ 2.0 g/cm³. Wire material of elastic mesh elements is EI-708 steel, and its diameter is in the optimal range of 0.09 mm ÷ 0.15 mm.

EFFECT: technical result consists in increasing the seismic resistance of a production building.

2 cl, 8 dwg