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Bjelke-/bjelkeforbindelser
BSF 225 kN, Bean-beam connection
BSF is a console-free system and consists of three parts:
- Beam unit: Cast into the concrete beam and must be anchored with specified anchoring reinforcement.
- Beam-beam unit: Cast into the concrete beam and must be anchored with specified anchoring reinforcement.
- Knife/sledge: Connect the beam to the column. This is made of solid steel and forms the part of the connection that transfers the load from the beam to the column. Before beam assembly, the knife is retracted and hidden inside the beam unit.
All parts are made of steel. The three main components are in steel grade S355. Threaded rods are quality 8.8, and stop washers are in steel quality S355.
Design principles
When deployed, the sliding knife cantilevers from the beam into the beam-beam unit. It bears onto the base of the beam-beam unit at the free end, which induces rotation of the knife. This is resisted by bearing against half-round bearing blocks in the beam. These half-round blocks in turn bear against reinforcement which is not shown.
Alle deler er laget av stål. De tre hovedkomponentene er i stålkvalitet S355.
Gjengestenger er kvalitet 8.8, og stoppskiver er i stålkvalitet S355 (leveres ved forespørsel).
Design prinsipper
Når kniven er på plass i bjelke-bjelkeenheten, fungerer denne som en utkrager fra bjelkeenden. Lasten påføres på enden av kniven hvor den overføres til bunnplaten i bjelke-bjelkekassen. Momentet fra utkragingen balanseres ved at kniven har opplegg mot to halvrundstål på bjelkekassen, ett i fremre overkant av bjelkekassen og ett på undersiden av kassen ved knivens bakre ende. Armering bøyd rundt disse halvrundstålene overfører oppleggskreftene fra kniven videre inn i betongbjelken.
- Capacity
- 225 kN
- Minimum column width
- 240 mm
- Minimum beam width
- 190 mm
- Minimum beam height
- 370 mm
- S 225, kniv
- 14.4 kg
- B 225, bjelkeenhet
- 7.4 kg
- SF 225 B-B, bjelke-bjelkeenhet
- 2.1 kg
- Memo nr 501 — BSF, capacities and minimum beam and column dimensions.
- Memo nr 502 — BSF, main dimensions.
- Memo nr 503 — BSF, reference levels in design.
- Memo nr 504 — BSF, tolerances.
- Memo nr 505 — BSF, torsion.
- Memo nr 506 — BSF, expansion joints.
- Memo nr 507 — BSF, seismic proposal.
- Memo nr 508 — BSF connection solution.
- Memo nr 509 — BSF, winter conditions fire protection & corrosion.
- Memo nr 510 — BSF, marking of the units.
- Memo nr 551 — BSF, a short guide to BSF sliding inserts.
- BSF Calculations
- Memo nr 521 — BSF, design of reinforcement.
- Memo nr 522a — BSF 225, reinforcement in beam end.
- Memo nr 522b — BSF 300, reinforcement in beam end.
- Memo nr 522c — BSF 450, reinforcement in beam end.
- Memo nr 522d — BSF 700, reinforcement in beam end.
- Memo nr 522e — BSF 1100, reinforcement in beam end
- Memo nr 523 — BSF, example reinforcement pattern in column.
- Memo nr 524 — BSF, design of reinforcement, units used in pairs.
- Memo nr 525 — BSF, design of reinforcement cantilivered beam-beam.
- Memo nr 526 — BSF, design of reinforcement T-connection beam-beam.
- Memo nr 527 — BSF, two sided t-connection beam-beam.
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