SU1564300A1 - Stay roof - Google Patents

Abstract

The invention relates to the construction, in particular to double-row cable-stayed coatings of buildings and structures, and can be used in the erection of buildings in seismic conditions. The aim of the invention is to increase the seismic resistance of the coating. The cable-stayed flooring includes cable-stayed trusses, each of which consists of a carrier cable 1 and a stabilizing cable 2, interconnected by posts 3. Roofing plates 4 are supported on pillars 3. Stands 3 have a developed cross-section in the plane of the cable-stayed farm and are attached to cables 1 and 2 through the friction assemblies 5. The bearing shrouds are fixed on the upper support contour 6, which is mounted on the frame 7 through the movable sliding supports. The stabilizing cables 2 are attached to the lower contour 8, which is rigidly connected with the structure of the frame 7. 7 Il.

Description

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The invention relates to the construction of double-byte bytes.

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covering buildings and structures, and can be used in the construction of buildings in seismic conditions, as well as under the influence of other dynamic loads, such as wind loads.

The purpose of the invention is to increase the seismicity of the coating.

Figure 1 shows the coating in Tan; figure 2 is a section L-A on ir.l; fig.Z - node I in figure 2; Aa FIG. 4 — node J) in FIG. 2; Fig. 5 (section B-B in Fig. 4; Fig. 6 shows the deformation scheme of the support unit of the cable frame under the influence of a horizontal seismic force; Fig. 7 shows the circuit of the rocking support legs of the Bearing guy.

The byte cover for seismic buildings includes byte trusses, each of which consists of a carrier guy 1 and a stabilizing guy 2, connected by small stacks 3. The roof panels 4 are supported on the stoics 3. The septic tanks 3 have a developed cross section, for example, I-beam in flat - to the trusses of the trusses and attached to the cables 1 and 2 through the friction units 5. The non-supporting cables 1 are fixed on the upper Support Circuit 6 of a circular outline in the 1 plan, which is mounted on the structure of the supporting frame 7 of the building. Movable sliding supports.

The stabilizing cables 2 are attached to the lower contour 8, rigidly connected with the frame structure 7,. t, e. below the contour clamping level 6. . The sliding supports of the contour 6 are made in the form of spherical washers 9 with lens-like inserts 10 installed in them with the possibility of rolling. Sliding supports are evenly spaced along contour 6 in places where the contour is supported on underlying structures of frame 7, Upper spherical washers are rigidly attached to support contour 6, and lower ones to elements of carrying cortical 7. Friction nodes 5 consist of friction hinges 11 and clamps 12, which are detachable for fastening to the cables 1 and 2 and fastened with bolts 13.

The proposed design of the coating during seismic effects on the building works as follows. Horizontal inertial forces P, arising at the level of the coating, cause an offset of the Јrnh of the support contour 6 (Fig. 6). Since the ends of the stabilizing cables 2 are fastened to the lower support contour 8, which is rigidly connected to the frame 7 of the building, the lattice of the cable trusses is deformed (Fig. 6). The frictional hinges 11 provide rotation of the pillars 3 relative to the cables 1 and 2. As a result, the kinetic energy of the seismic impulse is incurred to change the equilibrium state of the cable system, overcoming the resistance to twisting of the friction hinges 11 connecting the pillars 3 to the cables 1 and 2, and bending themselves 3 racks in the plane of the farm. At the same time, part of the kinetic energy is expended in sliding supports with a lens-like insert 10. When the support contour is displaced, the inserts 10 are rotated in such a way that a moment of force M of support reactions is created, which tends to return the contour to its original position (Fig. 7) M Rt-at Rj / a,

where R.,, R4 are the support reactions in sliding bearings;

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eccentricities of the application of support reactions.

The return of the entire coating system to an equilibrium state occurs as a result of the elasticity of the pillars 3, the cables 1 and 2, and the reverse movement of the sliding supports of circuit 6 due to the occurrence of a moment of support reaction forces M in these supports.

The geometrical and physical characteristics of the cables 1 and 2, the pillars 3, the sliding supports, and the compliance of the friction hinges 11 are set based on calculations of the actual seismic effects.

Claims (1)

Thus, the proposed coating significantly reduces the magnitude of the seismic forces transmitted from the coating to the building frame, due to the increased absorption of seismic energy in the coating structure itself and in places where it is supported on the underlying structures. i Formula of invention The byte covering comprising a frame with supporting contours mounted on it, carrying cables fixed to the upper contour, stabilizing - 51564300 & shoring cables fixed to the lower goal of increasing seismic stability of the pp contour and racks located the roofs, the upper support contour mi- between the cables and connected to them more fully with movable sliding supports at the nodes with the formation of cable-stayed forms, and frames, and - Frnktsion- characterized in that, with rymi. 12 one BUT In i 9 YU Fig.Z Fi.T U 3 9 Mf dgpf g.g v / and pf one 00 V9 {J I 6 g 7