RU2466245C2 - Spatial construction-structure of higher earthquake stability - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: spatial construction-structure of higher earthquake stability includes rod elements from glass-plastic pipes and nodal joints also from glass-plastic pipes, but of larger diameter. In the upper nodal joints six rod elements are formed, which are arranged from each other at the angle of 60° and are forwarded down relative to the horizontal plane at the angle of 30°. In the nodal joints with medium verticality three rod elements meet - from upper and lower nodal joints at the angle of 120° in the plan, and at the angle of 30° relative to the horizontal plane. The lower nodal joint arranged at one axis with the upper one is created in the same manner as the upper one, but it is turned upside down, besides, in the lower nodal joint apart from ascending ones there are another six horizontal rod elements directed towards other lower nodal joints and displaced relative to ascending rod elements by 30° in the plan, which form a lower belt of the spatial construction structure.

EFFECT: higher rigidity and stability under high static and dynamic loads.

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Description

This invention relates to construction, in particular to spatial structures, nodal joints and core elements of which are made of fiberglass pipes, and can be used as load-bearing structures and coatings of industrial, civil and agricultural buildings. It can be used for almost any objects where it is necessary to overlap large areas in areas with increased seismic activity.

A spatial core coating is known - its upper and lower belts are a lattice structure, the elements of which are made in the form of a trapezoidal profile of sheet metal. The diagonal spatial block is also made of trapezoidal profile by stamping. The belts are connected to the diagonal block using bolts (patent SU 687205 A1 from 09.25.79, EV 5/10).

The disadvantage of this solution is the complexity of manufacturing braces in the form of a spatial block and the complexity of the Assembly.

Known volume-molded structural structure. The basis of the design are volume-formed thin-sheet elements of a uniform geometric shape, which are made of rolled sheet steel with a thickness of t = 0.5 ... 3.0 mm. The peculiarity of the volume-molded structural design is that the steel strips are bent in opposite directions along the right or left helical line and are interconnected along congruent faces, with each subsequent connecting element being bent in the direction opposite to the bending direction of the previous one (patent RU 2265110 C2 dated 11.27.05, ЕВВ 5/10).

The disadvantages of this design are the high complexity, the complexity of the manufacturing process and significant consumption of steel.

The closest technical solution, selected as a prototype, is a combined spatial structural coating containing a spatial framework of connected in nodes of the rods of the belts and braces and placed in the middle of the spatial framework along the span. The lower and upper span reinforcing elements rigidly attached to the nodes of the lower belt of the carcass are mounted on supports and are located along the span with the lower contour reinforcing elements fixed and mounted above the frame of the lower belt nodes and the upper contour and span reinforcing elements are rigidly attached to the nodes the upper belt of the spatial frame (patent RU 80471 U1 from 10.02.09, EV 1/58).

The disadvantages of this solution are the high complexity due to the large span of the structure, the complexity of the manufacturing process. With this type of coating with a large span, significant horizontal forces arise on the side supports.

The aim of the claimed invention is to increase the rigidity of the entire structure, the solution of stability at high static and dynamic loads, increase bearing capacity, simplify installation.

The essence of this design lies in the effect of elasticity, in the ability to withstand huge dynamic loads, while maintaining dynamic stability and strength, in particular, due to the relatively high coefficient of internal energy absorption, in which the structure itself acts as a damper, in shape, in cross section resembling a spring.

The invention is illustrated by drawings, where figure 1 shows a General view of a spatial structure; figure 2 is a fragment of the plan of the spatial structure; figure 3 is a section; figure 4 is a fragment of the spatial structure.

The system consists of upper nodal connections 1 (Figs. 3 and 4), of which six core elements 4 are formed, spaced from each other at an angle of 60 ° and directed downward at an angle of 30 ° relative to the horizontal plane. In the middle nodal joints 2, three rod elements 4, 5 converge from the upper 1 and lower 3 nodal joints at an angle of 120 ° relative to each other in plan. Here the nodal connection 2 also plays the role of a stabilizer. The lower nodal connection 3 is located strictly under the upper nodal connection and is created in the same way, only turned upside down. In addition, in the lower nodal connection 3, in which, in addition to the ascending rod elements 5, six more rod elements 6 are located at an angle of 60 ° from each other, directed to other lower nodal connections 3, located in one horizontal plane and offset relative to upper rod elements 5 to 30 ° in the plan. The horizontal rod elements 6 and the lower nodal joints 3 represent the lower zone, in which the formed equilateral triangular cells form regular hexagons or can organize other regular polygons.

The design includes rod elements from fiberglass pipes 4, 5, 6 and nodal connections also from fiberglass pipes of only larger diameter 1, 2, 3 (Figs. 3 and 4).

The proposed form of spatial structure-structure is applied as follows. In the designs of the nodal joints 1, 2, 3, which are a cylindrical shape made of fiberglass, pre-cut holes matching the diameter of the outer diameter of the core elements 4, 5, 6, with a given angle to the axis of the nodal joints 1, 2, 3. After This is the installation of the rod elements 4, 5, 6 in the nodal connection 1, 2, 3 to the center of the axis, previously the rod elements 4, 5, 6 are wedged at both ends. In terms of the angle of the wedge of the rod elements 4, 5, 6, included in the upper 1 and lower nodal joints 3, is 60 °, and in the middle 2 - 120 ° for greater penetration into the nodal connection 1, 2, 3 and better bonding to each other, since the area of conjugation of the rod elements 4, 5, 6 with each other increases. The outer part of the surface of the rod elements 4, 5, 6, where there is a pair with the edge of the cutout of the holes of the nodal joints 1, 2, 3, is treated with glue. Next, the hollow part of the nodal compounds 1, 2, 3 is filled with an epoxy mass to reduce the cost and weight mixed with a filler and chemically inert material. Due to the exclusion of epoxy in the cavity of the core elements 4, 5, 6, sealing diaphragms of rigidity are installed in them.

The use of this spatial structure-structure allows us to solve the most complex technical problems in the form of the curvature of the ceiling in horizontal and vertical sections, as well as in the area of the structures to be covered. Increasing the service life, increasing the reliability of the entire structure, increasing the bearing capacity under static and dynamic loads, survivability in the presence of a chemically aggressive environment, ease of manufacture are some of the many advantages that the present invention has.

The manufacture of structural structures based on spatial elements from fiberglass pipes allows manufacturing structures on automated production lines, which leads to increased labor productivity, reduced material consumption and labor intensity. The design has architectural expressiveness and attractiveness, suitable for creating various forms: both flat coatings, and coatings in the form of cylindrical shells and shells of curvature of the second order.

Claims (1)

Spatial structure-structure of increased seismic resistance, including rod elements from fiberglass pipes and nodal connections also from fiberglass pipes of only a larger diameter, characterized in that six rod elements are formed in the upper nodal joints located at an angle of 60 ° from each other and directed down relative to the horizontal plane at an angle of 30 °, in the middle vertically nodal joints, three core elements converge - from the upper and lower nodal joints At an angle of 120 ° in plan and at an angle of 30 ° relative to the horizontal plane, the lower nodal connection, located on the same axis as the upper one, is created in the same way as the upper one, only turned upside down; in addition, in the lower nodal connection, in addition to the ascending ones, there are also six horizontal rod elements directed to other lower nodal joints and offset relative to the ascending rod elements by 30 ° in plan, which form the lower zone of the spatial structure-structure.

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