Tubular building structure

FIELD: construction.

SUBSTANCE: tubular building structure comprising pipes filled with concrete with nodal connection elements placed at their ends and comprising end upper and lower support square plates and steel supporting gussets welded to the external surface of the pipes. It is made with height of three floors of the building and is equipped with additional intermediate steel support plates. In parallel to the surface of upper end support plates and above them there are steel reinforcement rods with equal protrusions at each side of the pipe. Reinforcement rods may be arranged outside the steep pipes in pairs and symmetrically relative to the vertical axis of the pipes or are pulled via a steel shell of pipes.

EFFECT: increased stability, accelerated assembly of building frames.

1 cl, 4 dwg

 

The present invention relates to the construction, namely the tubular building structure in the form of trubobetonnykh columns with a pair overlaps, and is intended for use in the erection of prefabricated load-bearing frames for multi-storey buildings and structures.

Known load-bearing columns in the form of troublethe widely used in developed countries in the construction of multi-storey and high-rise buildings, televise, bridges and other structures in the form of coaxial paired, mostly, round steel pipes filled with concrete after installation of the steel shell, as a rule, in construction conditions (see, for example. Modern Street Tube Confined Concrete Structures / Cai Shao-Huai, China Communication Press, 2003, 358 p.).

Also known tubular building structure in the form of coaxially mated steel pipes with nodal connection element at the ends in the form of a flanged joint with a weld seam (see, for example, the book A.I. KIKIN and other "Design of steel tubes filled with concrete. - M.: Stroiizdat. 1974. - 145 C.). Developers design is recommended to fill the joint cavity between the flanges plastic cement perforated steel pipe for an air outlet. However, such a connection, as shown, the construction does not provide a sufficient strength of the pipe joint.

In addition, in the known solutions implemented in China is their trubobetonnykh columns after the installation of steel pipes directly on the construction site. This makes it very time-consuming need for ravnopravnosti concrete over the entire height of the column and creates a significant dependence of the characteristics trubobetonnykh columns in the Russian climate from the outdoor temperature. In the cold season to the complexity of the manufacturing process of the known constructions is added the need to produce insulation and additional heating of the concrete columns. Such conditions make it difficult to achieve uniform structural properties height trubobetonnykh columns, thus difficult to control the quality of concrete and consequently achieve the required bearing capacity of known structures.

Very fully described different ways of joints trubobetonnykh columns in the first normative documents in Russia, released the FSUE "SRC "BUILDING" in 2011 (the company's standard one HUNDRED 36554501-025-2011 "TRUBOBETONNYKH COLUMNS). The main part of the known solutions involves fairly complex elements of nodes and coupling for connection trubobetonnykh columns with each other vertically and with the construction of floors horizontally, which complicates their use for fast frame multi-storey and high-rise buildings and buildings with high reliability, especially during construction in areas of significant seismic activity.

At the closer the technical nature of the proposed solution is of tubular construction includes coaxially spaced upper and lower steel round pipe, connected with a horizontal load-bearing beams-beams hub connecting element in the form of three conjugate bases of hollow steel cylinders: upper, middle and lower (see, for example, patent RF №2342501, CL E04B 1/30, 2007). Thus the top and bottom of the middle cylinder is made of a steel backing plates of square section with a side of the square from 1.5 to 2.0 times of the outer diameter of the lower pipe, the thickness of the plates is selected from 1.5 to 3.0 wall thickness of the lower pipe, the ends of the horizontal beams-beams placed inside a steel tube provided with anchors for tension steel reinforcement cables in internal cavities of the beams located at mid-height medium cylinders along the symmetry axis of the internal cavity of the beams, with the beams have a square or rectangular section, and the lower support plate connected to the outer surface of the lower steel pipe steel gusset plates with thickness similar to the thickness of the supporting plates, and arranged vertically in planes passing through the diagonal, vertical and horizontal axis of the square plates.

The solution allows you to accelerate the installation of building frames, to increase their stability, seismic/especially with the use of BA is OK-beams, pre-stressed in conditions of construction sites. The mounting frames of buildings and structures is accelerated by the application of the developed nodes connecting elements, allowing you to build load-bearing columns vertically with poured concrete and connection horizontal prestressed beams-beams of reinforced concrete.

However, this technical solution has the disadvantage of considerable complexity in construction conditions due to the large amount of welding and the need of poured concrete internal volume of steel pipes, beams-beams and nodes connecting elements, which, as shown, the application slows down the pace of the mounting frame, especially in the construction of high-rise buildings, when it is necessary to apply the concrete to a considerable height, and to ensure its continuity in-line space and hardening in the oscillations of the day and night temperatures.

In addition, the use is known of the invention calls for the necessity of insulation and additional heating hardening of concrete during construction in the winter, and also makes it difficult to ensure ravnopravnosti concrete throughout the body trubobetonnykh supporting structure and its contiguity to the floors of multi-storey buildings and structures.

The purpose of this izaberete the Oia is to simplify and speed up installation trubobetonnykh columns and construction of floors of multi-storey and high-rise buildings and structures, regardless of weather conditions, stable given the strength and reliability of load-bearing structures of frames.

This objective is achieved in that the tubular construction design for modular construction of frames for multi-storey and high-rise buildings and structures, including circular, square or rectangular tubes filled with concrete, anchor fasteners, placed at the ends of the pipes and containing welded to the outer surface of the pipe end of the upper and lower bearing steel square plate with a side of from 1.5 to 2.0 diameter or the average width of steel pipes and steel supporting scarves, made with a height of three floors and equipped with an additional intermediate steel base plate welded to the outer surface of the pipe at the height of intersection with the floor joists, the thickness of each plate is selected in the range of 2 to 5 thickness of the pipe wall; the end of the support plate is made with the landing grooves with a depth ranging from 0.2 to 0.5 of the thickness of the plates to secure them to the ends of steel pipes and provided with holes for bolt fastening pipes to one another vertically and construction of floors in the horizontal direction, and an intermediate support plate provided with holes for bolt fastening pipes with the construction of floors horizontally, the orifices DL the bolts are located symmetrically around the perimeter of the outer surface of the steel pipe; parallel to the surface of the upper end of the support plate and above them are steel reinforcing bars with a minimum diameter of 14 mm with equal editions on each side of the pipe and a total length of from 2 to 4 diameters or average widths of steel pipes, and are reinforcing bars on the outside of steel pipes in pairs and symmetrically relative to the vertical axis of the pipe at a distance from the surface of the supporting plates, selected in the range from 3 to 10 thicknesses of the plates. In addition, the steel reinforcing rods passed through the steel casing pipe.

Beyond these parameters, the manufacture of tubular construction design goal is not achieved.

We offer tubular construction is depicted in figure 1 - General view; figure 2 is a longitudinal section; figure 3 is a view of the support plate in the direction of arrow "A" in figure 1: - placing reinforcing bars on the outside of the steel pipe; b - placement of rebar through the steel shell pipe; 4 - section In figure 1.

Tubular construction design contains a coaxially spaced steel pipes 1 and 2, for example, a round shape, with a height of three floors each, filled with concrete, for example, class b-30 - 2. At the ends of each tube are placed nodal connection element node clutch, including the top 3 and bottom 4 square steel mounting the plate thickness from 1.5 to 3 wall thickness of pipe, located coaxially with the pipes 1 and 2 welded to it and is made with grooves and landing slots 5 depth from 0.2 to 0.5 of the thickness of the plates to join them in the ends of steel pipes. Plates 3 and 4 are welded to the outer surface of the pipe in a continuous seam 6.

Design in the middle part contains the intermediate supporting steel plate 7 for the connection of tubular construction with the construction of floors, for example, by bolts 8. The thickness of each intermediate plate 7 is selected in the range from 2 to 5 wall thickness of pipe.

Socket 4 and the intermediate 7 backing plates to the outer surface of pipe welded steel supporting gussets 9 thickness equal to the thickness of these plates, and placed vertically in planes passing through the diagonal as well as vertical and horizontal axis of the supporting plates.

Each support plate is provided with holes 10 for bolt fastening columns with each other vertically and mounting the structures of the floors.

If necessary, increase the resistance power cut in places mates trubobetonnykh columns with beams or beams-beams in the proposed tubular design provides embedded steel reinforcing bars 11 different profile for the manufacture of monolithic floor coverings. The rods 11 raspolagayutsya surface of the upper end of the support plates 3 and have a diameter less than 14 mm As shown in figure 3, the reinforcing rods 11 are laid with equal editions of 12 on each side of the pipe and a total length of from 2 to 4 diameters or average widths of steel pipes. Are reinforcing bars on the outside of steel pipes 1, 2 in pairs and symmetrically relative to the vertical axis of the pipe at a distance "d" from the surface of the end supporting plates selected in the range from 3 to 10 thicknesses of the plates. To increase the resistance force of the slice node clutch trubobetonnykh columns with overlapping reinforcing bars 11 can be passed through a steel casing pipe (figb),

To ensure the rigidity of the frames of high-rise buildings and constructions, the invention provides for a monolithic slab at the level of the junction of the steel pipes with the thickness of the slab, including the thickness of both the supporting end plates and rebar with a protective layer of concrete (figure 1).

The selected dimensions of the support plates according to the invention ensures the reliability of the connection tubular constructions in a single trubobetonnykh column vertically at the expense of sufficient area to support a tubular structures and bolt fastening them together. The design allows for high resistance to the force of the cut to be placed under the base plate supporting steel gussets, the presence coloradobased and operational reliability trubobetonnykh design. Bolt of fastening of both end and intermediate support plates allow firmly and operatively connected with the tubular construction design as prestressed and ordinary beams, girders or slabs of a skeleton of a building or structure (figure 1).

Developed specifications and design parameters are optimal for achieving the goal of the invention to simplify the Assembly of the frame of a building and speed of installation.

At the time of Assembly of the frame of the building, for example, 43 storey building (Moscow, street davydkovsky, 3) showed the possibility of reducing the period of construction when applying the present invention in 2 times. The use of bolted connections supporting plates of the columns in combination with rigid diaphragms monolithic reinforced concrete floors every 3 floor high-rise building provides increased resistance, earthquake resistance and reliability.

The present invention can allow for the rapid Assembly of frames of residential and public multi-storey and high-rise buildings and structures of the components of prefabrication with guaranteed quality at any time of the year, which is very important for construction in Russia and other countries with cold climate.

1. Tubular construction for precast construction frameworks mnogoetazhnyiy high-rise buildings and structures, consisting of round, square or rectangular tubes filled with concrete, anchor fasteners, placed at the ends of the pipes and containing welded to the outer surface of the pipe end of the upper and lower bearing steel square plate with a side of from 1.5 to 2.0 diameter or the average width of steel pipes and steel supporting scarves, characterized in that the height of a three storey building and is equipped with an additional intermediate steel base plate welded to the outer surface of the pipe at the height of intersection with the floor beams, the thickness of each plate is selected in the range from 2 to 5 thickness pipe wall; the end of the support plate is made with the landing grooves with a depth ranging from 0.2 to 0.5 of the thickness of the plates to secure them to the ends of steel pipes and provided with holes for bolt fastening pipes to each other vertically and the construction of floors in the horizontal direction, and an intermediate support plate provided with holes for bolt fastening pipes with the construction of floors horizontally, with the bolt holes are located symmetrically around the perimeter of the outer surface of the steel pipe; parallel to the surface of the upper end of the support plate and above them are steel reinforcing rods with a diameter of at least 14 is m equal editions on each side of the pipe and total length from 2 to 4 diameters or average widths of steel pipes, and there are bars on the outside of steel pipes in pairs and symmetrically relative to the vertical axis of the pipe at a distance from the surface of the supporting plates, selected in the range from 3 to 10 thicknesses of plates.

2. Tubular construction according to claim 1, characterized in that, with the aim of increasing the resistance of the anchor coupling element power cut, steel reinforcing bars are fed through the steel casing pipe.



 

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