SU1539295A1 - Method of reinforcing beam members - Google Patents

Abstract

The invention relates to the construction, in particular to the strengthening of the beam elements during the reconstruction of the building framework. The purpose of the invention is to increase the stability of beams during bending with a decrease in metal consumption during the reconstruction of the building framework. The method of reinforcing beam elements comprises installing on both sides of each element 5 new bearing metal beams 8, combining them between themselves and with reinforcing element 5 on top of transverse flexible links 9, the ends of which have the possibility of movement relative to beams 8. Beams are connected from below with rigid transverse traverses on which jacks are installed, jacking up of all beams with subsequent fixation of their deflection with gaskets, release of jacks. Moreover, for transverse bends 9, the upper metal beams 8 are fastened for the period of jacking. 7 il.

Description

FIG. five

The invention relates to the construction, in particular to the strengthening of the beam elements during the reconstruction of the building framework.

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The purpose of the invention is to increase the stability of beams in bending with a decrease in metal consumption during the reconstruction of the building frame.

FIG. Figure 1 shows the building before reinforcement, a transverse section; in FIG. 2 — the section A-A in FIG. one; in fig. 3 shows the building after reinforcement, a cross section in FIG. - section BB in FIG. 3 in FIG. 5 - section bb In fig.Z; in (Jnr. 6 - section G-D in Fig. 3; in Fig. 7 - section D-D in Fig. 6.

The two-span building is made of extreme columns 1, embedded in foundations 2, middle columns 3, beams 5, erasable on columns 1 and 3, overlapping panels 6, floor structures 7, during the period of reconstruction co-jjiOHbi 1 and foundations 2, on columns 1 bipers on both sides of the new carrier falk (trusses) 8, connected to each other with Yrug by flexible connections (plates, reinforcement) 9 and lower - by transverse traverses 10 (thick inoca) or 11 (rolling profiles: Channel etc.).

Jacks 12 are installed on the lower cross-beams, which, through the support strips 13, unload the corresponding beams S and middle columns 3 and load the new beams 8, while the upper cross-beams 9 bend along with the new beams 8, not allowing them to lose stability by themselves. stresses in the upper zone of the beam) during the jacking period.

After unloading the old beams into the gaps between the upper beams themselves and the overlapping of the plant with wedge gaskets, and between the lower crossheads and the old beams of the gasket 15. This ensures full loading of new load-bearing structures and deformation (from the load) of them, which in turn provides only an additional small deformation (or its complete absence) of the supporting structures, which is especially important in reconstructed buildings, since repeated deformation of the bearing elements (their large deflections)

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in most cases it is unacceptable due to the occurrence of cracks in the seams of the overlap.

Since the overall stability of a large span of beams from the plane is not ensured, the design and construction of upper transverse flexible links connecting the squeezed upper wooden beams (trusses) is carried out as for connecting elements (strips, grids) of compressed composite rods on the conventional transverse force, taken constant along the entire length of the rod.

The method is carried out in the following sequence.

Claims (1)

Above the existing beams, flexible connections are brought in, new beams are placed under the ceiling, the ends of the flexible connections are folded over and attached to washers attached to new beams, lower crossbars are installed, jacks are placed on them and jacking beams followed by fixing their positions riding new beams and overlapping and bottom of old beams and new, free jacks. Formula invented and A method of reinforcing beam elements containing installation of new load-bearing metal beams on both sides of each reinforced beam element, connecting the bottom of the latter with rigid transverse cross-beams, placing jacks on them, jacking up all the beams with subsequent fixation of their deflection with gaskets, combining metal beams between themselves and with the reinforced element and the release of jacks, characterized in that, in order to increase the stability of the beams during bending with a decrease in meta loemkosti at union metal beams between the reconstruction frame of the building itself and the reinforcing element on top performed transverse flexible linkages, the ends of which are movable relative to the beams, to jacking, raskrepl wherein the period jacking of the upper plane of the belt of metal beams. 5 L | 6 5 i / CD yoke fu9.2 Bb yZjy FIG. four L- L. 7 // Fm.6 D (