FI80320C - ELEMENTPELARENS OCH -BALKENS BULTFOERBAND. - Google Patents

Description

1 80320

BOLT JOINT OF ELEMENT ELEMENT BEAM AND BEAM

The bolt connection of the element column and beam is a connection developed for element technology. The invention substantially facilitates and simplifies the design, manufacture and installation of the element column and beam. The design of the elements is done with modern technology using a column projection, which always requires heavy work and expensive reinforcements, firstly in the column projections and secondly in the notched ends of the beams. In addition, the use of a column protrusion complicates the technology and production of the element-10. Making a protrusion on steel molds is a cumbersome and expensive operation.

The installation of the elements is hampered and slowed down by the fastenings and post-castings that are necessary during the installation with today's technology, which provide sufficient security to keep the beam in place and prevent the beam from twisting to continue the installation of the elements.

These fastenings have to be used very often .. welding and in practice these fastening work is done under 20 very difficult working conditions. Occupational safety is poor, the worker has to work on his ladder at a height of several meters with both hands. It is, of course, possible to build safe racks for the execution of the work, but this in turn takes time and the effective progress of the work is slowed down. Expensive cranes are idle and waiting for work to continue. The aids and accessories used for fastening are always difficult to take to the right place with the help of a ladder. In addition, it is necessary to wait for the joint castings to harden, the installation work cannot be completed continuously and temporary supports have to be made during the installation phase.

2 80320

The bolted joint according to the invention provides a decisive improvement over all the above drawbacks.

First, the invention substantially facilitates the work of the designer, as the laborious design of the column projections and beam-5 ends is eliminated. The steel parts in the joints are standardized and the appropriate steel part is always selected for each case. Reinforcements for beam elements will be simplified and standardized. The manufacture of the column element path is considerably facilitated by the omission of the projections from the columns 10. Molds no longer need to be broken.

At the column projections, steel housings are installed inside the mold between the column steels, which are connected to each other with two bolts during casting to ensure that they remain in place. As the lower bolt, 15 identical bolts are used, which then fasten the steel support supporting the beam element to the column before installing the column in place. At a later stage, the joint steel of the slab coming from the beam is installed in the hole left by the upper bolt.

20 The manufacture of the beam element is also simplified, because the notch needed for the column projection is left out of the end of the beam. The holes for the fixing pins previously required for attaching the beam to the column projection are still omitted. The steel part coming to the end of the beam can now be fixed to the intact end plate of the casting mold in exactly the right place. This steel feed fits well inside the beam reinforcing steels.

The installation of beam elements is now made easier and faster. Ladder attachments 30 are completely omitted. The installed beam element is firmly attached to the pillars and tile elements can be mounted on it immediately. The beam element can be loaded unilaterally, as the joint 3 80320 receives the torque from the eccentric load. The steel parts in the joints are protected against rust and fire by grout-cast concrete. Post-castings can be performed simultaneously with the joint castings of the slab on the beams. The element installation can thus continue in the upper layer at the same time as the lower layer seam castings are performed.

In order to achieve the above effect, it is necessary that what is set forth in claim 1.

The joint is characterized in that at least one fastening member (1) passing through the column fastens a steel support (2) in an upright position to the column-oriented steel housing (5), which enters the steel housing (5) in part 6), the upper end of the steel support (2) is supported and fastened by a housing-shaped, covered steel part (4) with fastening nails (3) at the end of the beam.

In the following, the invention will be described in detail with reference to the drawings

Figure 1 shows the bolted connection of the element column and beam from the side.

Figure 2 shows the joint spaced horizontally.

Figure 3 shows the joint in a vertical section.

25 Fastening member (1) with a steel support (2) attached to the column. The fastening bolt (1) receives the tensile stresses acting on the joint. The steel support (2), which is a steel tube, partially enters the U-shaped steel housing (5) in the column, whereby its retention 5 is ensured. A steel support (2) with a polygonal cross-section is attached to the column from the upper end of the wall on the column side where the hole of the fastening member (1) is vertically elongated and ensures that the fastening bolt (1) does not support the steel support (2). 2) there is a hole in the outer wall leading to the bolt head. A washer and, if necessary, a sufficient reinforcement plate are used between the base of the fastening bolt (1) and the wall of the steel support (2). The steel support (2) rests on the base part (6) of the steel housing (5), which forms a compressive force receiving the support surface.

The upper end of the steel support (2) is supported and attached to the beam end by a housing-like U-shaped steel part (4) surrounding the steel support (2), which prevents the beam from tilting, the cover part of which forms a support surface receiving compressive force. 20 In this support surface there are steel tapers (3) tapering downwards in the direction of the beam, these fastening nails (3) anchoring the beam to the steel support (2) for the required horizontal force.

In order to obtain the effect of the joint according to claim 1 described above, it is possible to make the joint 25 using different fastening means (1), e.g. different types of dowels and different cross-sectional options of the steel support (2) such as 4-angle, 6-angle, 8-angle or circle.

The problem raised in this study is generally recognized in practical design, in the prefabrication industry and on-site prefabrication and has been discussed in professional journals. In recent years, efforts have been made to find a number of solutions to this, none of which has become generally accepted.

Claims (6)

5 80320 A bolt connection of a prefabricated column and beam is a connection developed in the element technology, in which the prefabricated beam is fastened to the prefabricated column by means of different steel parts and is characterized in that at least one fastening member (1) a steel support (2) which partially enters the steel housing (5) and at its lower end rests on the base part (6) of the steel housing (5), the upper end of the steel support (2) rests and is fastened to the beam-shaped housing with a lid by means of fastening claws (3) ) with a steel part (4). Connection according to Claim 1, characterized in that the fastening element (1) is a bolt which passes in a straight line through the column. Connection according to Claim 1, characterized in that the steel support (2) is a polygonal steel tube. The joint according to claim 1, characterized in that the steel part (4) is housing-shaped, U-shaped and surrounds the steel support (2), the cover part forming a support surface receiving the compressive force 20 with steel beams (3) tapering downwards in the direction of the beam. The joint according to claim 1, characterized in that the steel housing (5) is U-shaped and surrounds the steel support (2), the base part (6) swells the support surface receiving the compressive force, the lower hole in the rear wall of the steel housing (5) is a fastening bolt (1) and upper hole, for mounting the steel housing (5) in the mold and for the joint steel of the slab. 6 80320