HALFEN Rebend Connection HBT
24Pages

HALFEN HBT REBEND CONNECTION ! N EW • DIBt Approval Z-21.8-2035 • Type tested acc. to approval • RAL-Certified

HALFEN HBT REBEND CONNECTION Introduction and system description 3 ■ Type overview/application examples 4-5 ■ Calculation basis according to approval Z-21.8-2035 10-11 ■ Selected load capacity values in accordance with the type test 12-14 ■ Calculating reinforced concrete corbels 15 ■ Layout of the reinforcement in the case 16 References/ Tender texts/Contact Tender text examples 21 CAD drawings for HBT-Elements can be found in the HALFEN CAD library under reinforcement technology. All drawing can be downloaded free at www.halfen.de. Following file formats are available: A free DVD is also...

HA L F E N H BT RE BE ND CO NNE CTIO N Introduction and System Description HBT - the connection solution The HALFEN HBT is the first rebend connection with general building approval. The simplified calculation method according to the approval requires verification of only two basic load cases, this results in higher shear load capacity than previously. HALFEN HBT Rebend connections allow a simple and effective connection of reinforced concrete elements, which are cast in different phases. All types of slabs, from floor slabs, walls and stairs can be subsequently cast with sufficient bond....

Shear load transverse to the case, for example; floor-slab — wall Application Vertical section Rebar type 2 × Type 1 Construction joint Shear load transverse to the case, for example; landing-slab — wall Application Vertical section Rebar type Type 2 + type 3 Cantilever slab Cantilever slab

HALFEN HBT REBEND CONNECTION Type Overview/Application Examples Shear load tranverse to the case, for example floor-slab — floor-slab Application Vertical section Rebar type Shear load transverse to the case, for example corbel — wall Application Vertical section Rebar type Shear load longitudinal to the case, for example wall — wall and floor-slab — wall Application Horizontal section Rebar type

HA L F E N H BT RE BE ND CO NNE CTIO N Single-Row Profiles Profile dimensions End spacing Rebar spacing Casing width Element length Rebar layout Case dimensions [mm] rebar ∅ [mm] 8 Other element lengths on request Rebar types See table on page 7 for rebar dimensions

HA L F E N H BT RE BE ND CO NNE CTIO N Single-Row Profiles Rebar dimensions [mm] profile rebar spacing

HA L F E N H BT RE BE ND CO NNE CTIO N Double-Row Profiles End spacing Rebar spacing Rebar width Casing width Element length Rebar layout Case dimensions [mm] profile Other element lengths on request Rebar types Straight rebar R  educed rebar width at stirrup end due to minimal space in the case (see page 16)

HA L F E N H BT RE BE ND CO NNE CTIO N Double-Row Profiles Rebar dimensions [mm] profile *rebar type 7 for HBT 80 not available

Product selection allowing for required concrete cover of the rebend reinforcement Thickness of component D2 [mm] profile 100 120 140 160 180 200 220 concrete cover c nom [mm] * depends on spacing a between the cases cnom Product selection for 1-part element Product selection for multi-part elements Basis for calculation according to approval number Z-21.8-2035 General information The concept for the approval is based on the calculation and the structural application as applied in the following standards and guidelines: DIN EN 1992-1-1 with DIN EN 1992-1-1/NA (National Annex) and the...

Shear load, transverse to the concrete joint Shear resistance with shear reinforcement The decisive resistance for verification results from 30% of the shear load resistance VRd,max according to DIN EN 1992-1-1, section 6.2.3: Effective static height: Calculation is according to DIN EN 1992-1-1, section 6.2 and DIN EN 19921-1/NA, as for monolithic produced building components; whereby the following additional provisions must be observed. VEd ≤ VRd ≤ 0.3 ⋅ VRd,max An additional load in the longitudinal reinforcement caused by shear forces must be verified assuming a compression strut angle...

Shear load capacity transverse to the case — no shear reinforcement Single connection example; 1 × Type 5 Multipart connection example; 2 × Type 1 Shear load resistance VRd [kN/m] (≤ 0.3 ⋅ VRd,max) rebar ∅/ spacing s [mm/cm] Always refer to the information in the type test concrete strength class C20/25 concrete strength class C25/30 8/20 concrete strength class C30/37 8/20 Note: • Standard dimension according to page 7 and 9 • Load capacities for further rebar dimensions and for rebar spacings of 25 cm[kN], see type test

Shear load capacity transverse to the case — with shear reinforcement Single connection example; 1 × Type 5 Multipart connection example; 2 × Type 1 Please refer to the HDB Product information and approvals no. Z-15.1-249 and Z-15.1-270 when determining the shear reinforcement using HALFEN HDB-S Shear reinforcement. Always refer to the information in the type test Shear load resistance VRd [kN/m] (≤ 0.3 ⋅ VRd,max) rebar ∅/ spacing s [mm/cm] concrete strength class C20/25 concrete strength class C25/30 8/20 concrete strength class C30/37 8/20 Note: • Standard dimension according to page 7...

Shear load capacity, longitudinal to the case — single row profile Shear load resistance VRdi [kN/m] (≤ VRdi,max) profile rebar ∅[mm]/ spacing s [cm] Multipart connection example; 2 × Type 1 Standard type according to page 7 Always refer to the information in the type test Note: • Load capacities for further joint widths, for further rebar dimensions and for rebar spacings of 25 cm, see type test • The joint areas a between the HBT Cases must be designed as rough or suitably indented as defined in DIN EN 1992-1-1; 6.2.5. Shear load capacity, longitudinal to the case — double-row profile...

HA L F E N H BT RE BE ND CO NNE CTIO N Calculating Reinforced Concrete Corbel Calculating a reinforced concrete corbel for HBT Type 7 Type 7 Geometric assumptions: dBR = 10 ∅ Strutural boundary conditions Anchorage length in the corbel: 0.3 . lb,rqd lbd ≥ max 6.7 ∅ Shear load capacity in the corbel: FEd Concrete strength class C30/37 cnom =35 mm Tensile load in the corbel: ac a +z + HEd . Hz o zo o Required reinforcement for tension as,rqd = min ; where Fbd = anchored load Verifying the reinforcement overlap length in the wall for: l0,avail. = b1 - 6∅ In addition to the corbel calculation...