KUB-3V system. Detailed description

Transcription

1 KUB-3V system Detailed description

2 The Company SYSTEMA STROY Limited Liability Company

3 1. KUB-3V system is a composite framework without collar beams for the construction of up to 24-floored buildings at the non-seismic areas and up to 16-floored buildings at the seismic areas, and the limiting height (number of floors) of a building at the seismic areas depends on seismic load magnitude (seismicity) near construction site. 2. KUB-3V frame system complies with the up-to-date regulations of the Russian Federation (SR Loads and Impacts. - regulates the loads and impacts on building structures, in particular, constant, long-term, short-term, wind, snow, and other load types. Also, this regulatory document has the data for combination and safety margin factors. SR is an analogue of Eurocode 1, BAEL 91, DTR C2-47/NV99 (RNV 99). SR Construction in Seismic Areas - regulates and establishes the requirements for seismic load adjusted calculation, space-planing solutions, design of the elements and their connections, and provision of seismic resistance for buildings and structures. 3. In 2015, the detailed calculation was done for KUB-3V (KUB-3V-ALG) system suitability for construction at the seismic areas of Algerian Peoples Democratic Republic (APDR). Static and strength calculations for the bearing structures of KUB-3V (KUB-3V-ALG) system residential building was done using Autodesk Robot Structural Analysis Professional 2016, considering the seismic impacts as per RPA 99 norms (APDR Norms). The calculations showed that KUB-3V (KUB-3V-ALG) system could be used in up to 16- floored buildings at the seismic areas of APDR. 4. The bi-directional spatial rigidity of KUB-3V system buildings is ensured by the bearing composite frame combined with the vertical diaphragm plates as well as the brace pieces as per the rising scheme, which provides the sufficient building strength. The building framework has the bi-directional reinforced internal collar beam that is in the composite frame body. 5. KUB-3V system inter-column joint is done at the floor slab level (see Fig. 1). Where the columns have max loads, the bearing steel bars are reinforced with the clamps of 8 to 10 mm dia. Class A1 bars at a pitch (distance) of 100 mm. The floor slab, where it is fixed to the column, has the enhanced pocket of 100х63х6 mm metal angle members. These technical solutions in KUB-3V system allow no bucking of working reinforcement at the inter-column fixture points, hereby avoiding the column destruction. View А Mounting tack Column Floor panel Weld seams with tensile forces at joint Fig. 1 Floor slab level connection of the columns.

4 6. In KUB-3V system, the diaphragm plates have extra reinforcement. The diaphragm plates are installed to each other floor-by-floor, resting on the floor slab through the special metallic embedded parts fixed to the item end s lower portion, followed by connecting the diaphragm plates with each other, floor slab and columns, producing the frame rigidity. 7. KUB-3V is a precast frame system without collar beams, it has no external collar beams. Collar beam in built into floor slab. 8. KUB-3V system s vertical diaphragm plates are installed longitudinally and transversely. KUB-3V system s floor slabs are fixed each other rigidly with the outstanding metal hooks. So, it produces a unified rigid monolithic floor disk. Detailed description of KUB-3V system Main frame parts of KUB-3V system are the floor slabs (divided into above-column, intercolumn, and middle ones) and the columns. The diaphragm plates and braces are used as reinforcing members. KUB-3V system item mounting process is carried out as follows: 1. The columns are installed onto the reinforced sleeve foundations, followed by pouring concrete (see Fig.2). 2. After the columns are mounted, the floor panel is mounted on the column (see Fig.5). When mounting the above-column floor panel, a conductor is used to fix the panel horizontally, strictly as per the project, and the improved support bracket fixes the panel vertically (design elevation) (see Fig.3 and 4). The above-column floor panel mounted at design elevation is fixed to the column by welding the panel shell to the column s working reinforcement, using the steel intermediate components in the shape of angular members or plates. Then, the intercolumn floor panels and the middle panels are mounted, in doing so the protruding bars at the adjacent panel ends are aligned so that a hook is formed through which opening the reinforcement bars are inserted. After mounting the reinforcement bars, the floor panel joints are covered with concrete (see Fig.9). At the same time, the above-column panel-to-column joints are covered with concrete, adding to concrete the additives that increase adhesion of fresh concrete to product concrete. The floor panels are placed at the design position using the dedicated posts to be mounted below the adjacent panel joints (see Fig. 6); 3. Then, the subsequent tier of the columns is mounted. The column joint provides forced installation during which the fixing rod of the upper column lower end shall enter the lower column upper end pipe. The steel bars are welded, provided the joint has tension forces. 4. The diaphragm plates are installed to the mounted floor. The diaphragm plates are installed floor-by-floor to each other, resting on the floor panel through the special embedded parts installed to the item end s lower portion. The diaphragm plates are fixed to the floor panels at the upper and lower parts, installing extra reinforcement bars, and to the columns using the embedded parts mounted onto the column and diaphragm plate. Simultaneously with embedment of the floors, the diaphragm plate s horizontal weld is covered with concrete;

5 KUB-3V system Fig. 1 Column. Conductor. Composite support bracket. Floor slabs (above-column, inter-column, and middle) Column concrete class В25 Foundation grout of М100 cement and sand mortar Fig. 2 Installation of the columns onto the reinforced-concrete sleeve foundation. composite support bracket support screws Fig. 3 Installation of the composite support bracket

6 conductor plates guide Fig. 4 Installation of the conductor and support bracket above-column slab Fig. 5 Mounting the floor panel on the column rest support pole pole tripod Fig. 6 The supporting posts are installed along the floor panel s perimeter

7 above-column slab inter-column slab above-column slab support pole support pole support pole Fig. 7 The above-column floor panels are mounted, and then the inter-column ones Fig. 8 The middle floor slabs are installed last covering the floor joints with concrete Fig. 9 The welds between the floor panels are filled with fine-grained concrete

8 Fig. 10, 11 and 12 Construction phases

9 KUB-3V system framework operation description The framework is based on the substitutive frames principle. The substitutive frames are formed in two mutually perpendicular directions by splitting the framework with vertical planes parallel to the column axes through the middles of the adjacent transverse (internal and end) spans. The substitutive frames are as a tier of the columns connected by the relative collar beams consisting of strip (slab portion) with a width equal to the distance between the middles of two transverse spans adjacent to the respective tier of the columns. (Fig. 1) With the certain columns positioned irregularly, it is recommended in common case to review the regular frame system with the mutually perpendicular axle lines that pass through the center of all the columns. This accepts a tentative (fictitious) elastic support at the intersecting points of the axial lines, where no columns are present, which elasticity is characterized by buckling the conditional collar beam of the substitutive frame in a direction perpendicular to that under review. The tentative collar beam is resulted by the certain laying the reinforcement bars in the structural members. (Fig. 2) Fig. 1 Substitutive frame scheme (hidden collar beam is cross-hatched) Fig. 2 Reinforcement enhancement scheme of the (above-column) slab for obtaining the hidden collar beam. It should also be noted that KUB-3V system has the brace-to-column fixture unit design developed that reduces the structure resonance possibility during forced oscillations (seismic impact). Also, the slab-to-slab fixture unit has good distribution capabilities i. e. it is tentatively rigid (with a force moment bearing capacity of 50 kn*m), which allows, when the member exceeds its max forces, redistributing the loads by hinge formation at the slab joints, without destruction of the bearing structural member itself. This gives an advantage as for the perception of dynamic influences and the resistance to the destruction of building structures.

10 The description of interaction between the framework members. Main connections: 1. The column-to-floor slab connection is rigid and is done by welding the slab shell to the column s reinforcement bars, using the steel intermediates as angle bars or plates, followed by covering the connection with concrete (see Fig. 1.1). Connecting member as a rectangular Floor panel Embedment with concrete class В25 Floor panel Column Connecting member as a rectangular Floor panel Column Fig.1.1 Floor slab-to-column connection 2. The column-to-diaphragm plate connection is rigid and is done by welding the column s embedded parts and the composite diaphragm plate. Embedded part of column Column pitch 750 Fig Column-to-diaphragm plate connection

11 3. The column-to-diaphragm plate connection is hinged and is done by hanging the floor slabs over the bracing wall, transmitting loads partially along O axis. Floor panel diaphragm diaphragm Floor panel diaphragm diaphragm Fig Floor slab-to-diaphragm plate connection 4. The column-to-foundation is rigid and is done either by placing the column to the sleeve foundation or by welding the protruding bars from the foundation and column, followed by covering with concrete. Column concrete class В25 Foundation grout of М100 cement and sand mortar Fig Column-to-sleeve foundation connection 5. The column-to-column connection is rigid and is done by welding the reinforcement bars to each other, followed by covering the joint with concrete. Floor panel Floor panel Embedment with concrete class В25 Fig Column-column joint

12 6. The slab-to-slab connection is rigid (finite bending rigidity from slab plane up to 50 kn*m) and is done by covering the protruding bars from the floor slabs with concrete. Protruding bars with a pitch 300 concrete class В25 Embedment with concrete class В25 concrete class В25 Protruding bars with a pitch 300 Protruding bars with a pitch 300 Fig Slab-to-slab connection 7. Connection of the composite wall members of the diaphragm plate is rigid and is done by covering the protruding bars from the precast wall members of the diaphragm plate with concrete. Fig Connection of the composite wall members of the diaphragm plate

13 Protruding bars with a pitch 200 Protruding bars with a pitch 200 Protruding bars with a pitch 200 Protruding bars with a pitch 200 Column Protruding bars with a pitch 200 Fig Column-to-diaphragm plate connection General load transmission scheme. Vertical loads are transmitted from the floor slabs to the columns and then to the building foundation. Horizontal loads are transmitted from the slabs to the columns, and from the columns to the diaphragm plate walls and building foundation. Dynamic loads are perceived as a total of the building framework structural solutions i.e. the floor slabs framing anchors with the columns and the diaphragm plate walls, considering the rigid connection between the columns and the building foundation.

14 Variants of the enclosing parts The building s bearing framework consists of internal members (columns, floors, and, if needed, braces or diaphragm plates). Practically, any facade solutions can be used as outer enclosing structures (walls): reduced-weight heat-efficient stone (incl. brick-dressed), different cladding panels, ventilated facades, stained-glass enclosures etc 1. Ceramic tiles 2. Flexible ties 3. Facing brick 4. Air clearance 5. Gas-concrete blocks 6. Thermofiller 1. Extra bricks 2. Flexible ties 3. Facing brick 4. Air clearance 5. SKTs blocks 6. Thermofiller 7. Heat-keeping material 1. Fixture element 2. Plaster layer 3. Gas-concrete blocks 4. Heat-keeping material 1. Fixture element 2. Facade tiles 3. Air clearance 4. Bricks 5. Heat-keeping material 1. Protective covering 2. External wall panel 3. Thermofiller 4. Heat-keeping material

15 Facing panel option and fixture system justification. For the precast reinforced-concrete framework of KUB-3V system, it is effective to use МЕТТEМ outer walls with light steel thin-walled structure technology. The outer wall light structures mean a building structure strength, reliability, durability, fire safety, noise protection, and environmental resistance. МЕТТEМ outer walls with light steel thin-walled structure technology consist of the following: the steel, galvanized, cold-rolled products used as a framework, the highly effective mineral-wool plate served as a framework aggregate, the cement-bonded particle boards used for internal finish, and the cement-bonded particle boards, fiber cement sheets etc. used for outdoor finish. The outer wall light structures are mounted with the walls partially embedded inside the building; in doing so, the upper portion of the wall is adjacent to the floor slab, the side portions are adjacent to the columns, and the lower portion partially rests on the floor slab. The outer wall installed is fixed to the upper portion using a steel plate, and to the lower portion using a steel angle bar. To the outer wall, the steel angle bar and plate are fixed using self-tapping screws, and to the floor slab these are fixed with anchor bolts. Cold-rolled products Fiber cement sheet Gypsum bonded particle board Mineral-wool boards Wall panel mounting technology Vent facade grillage Seat angle Mounting plate Heat insulation Sealing bundle МЕТТEМ wall thermopanels Reinforced concrete floor disk Keramgranite

16 Objects with KUB system composite framework without collar beams Low-storey houses Russia, Saint-Petersburg, Mezhozernaya str. 16, bld. А, Multi-apartment residential building with built-in underground parking of 5,336 sq. m in total area

17 Russia, Leningrad Region, Ust-Luga settlement, Lenryba quarter, low-storey residential complex of 10,000 sq. m in total area

18 Russia, Leningrad Region, Schlüsselburg, Krasny Tract str., low-storey residential complex 23,000 sq. m of total area

19 Multi-storey houses Russia, Leningrad Region, Vsevolzhsky district, highroad to Lavriki, 64 variable storey residential complex storeys with КУБ-3V composite technology 88,008 sq. m of total area

20 Russia, Saint-Petersburg, Pargolovo settlement three 24-storeyed houses of the comfort-class residential complex are erected using KUB-3V composite technology

21 Russia, Nizhny Novgorod, Genkina str., 61, 10-storeyed residential house of 10,490 sq. m in total area

22 Russia, Nizhny Novgorod, Osharskaya str., 96, 10-storeyed residential house of 8,090 sq. m in total area

23 Russia, Ulyanovsk, Octyabrskaya str. 1,2, 24-storeyed residential house of 51,189 sq. m. in total area Car parking of 4,475 sq. m. Russia, Korolev, Moscow Region, residential complex