HALFEN HSD SHEAR DOWEL SYSTEM HALFEN SHEAR DOWEL SYSTEM

HALFEN HSD SHEAR DOWEL S YS TEM Table of contents HALFEN HSD-CRET heavy duty shear dowels - Introduction: - Basics – Expansion joints to prevent constraint stresses 3-4 Product features: - Technical data 5 - Type selection, dimensions 6 Relevant dimensioning resistances: - HSD-CRET Shear dowels with longitudinal movement 7 - HSD-CRET V Shear dowels with longitudinal and transverse movement 8 In situ reinforcement: - Stirrup arrangement 9 - 10 - Design example slab 11 - 12 - Design example beam 13 - 14 Fire protection - HSD-F Fire protection pad 15 Assembling references 16 HALFEN HSD single shear...

HALFEN HSD SHEAR DOWEL S YS TEM Introduction Expansion joints to prevent constraint stresses HSD-CRET sleeve The effects of ▪ shrinkage ▪ temperature ▪ creep in case of post-tensioning ▪ subsidence require constructive measures in large supporting frameworks. HALFEN HSD-CRET shear dowel Movement joints prevent the uncontrolled formation of cracks and the subsequent damage that arises from this as a result of leakage and corrosion. Advantages of the HALFEN shear dowel system: The solution: the HALFEN HSD Shear dowel system Conventional: problems with conventional design Flat slab (vertical section)...

HALFEN HSD SHEAR DOWEL S YS TEM Dimensioning Expansion joints to prevent constraint stresses For flat slabs, it is advisable to arrange the dowels at different spacings according to the different shear load concentrations. The value and the distribution of the shear load to be transmitted can be determined by a finite elements slab calculation. The static model of a continuous beam is suitable for the dimensioning of the edge of the slab. Shear and bending moments will be used for the dimensioning of the reinforcement across and along the edge. It must thereby be noted that transverse and longitudinal...

HALFEN HSD SHEAR DOWEL S YS TEM Heavy -dut y shear dowels Product description HSD-CRET heavy-duty shear dowel consisting of dowel part and sliding socket, single-axis movement - along the dowel axis Dowel part HSD-CRET V heavy-duty shear dowel consisting of dowel part and sliding socket, two-axis movement – along the dowel axis and parallel to the joint Sliding socket, longitudinal movement HALFEN HSD-CRET heavy-duty shear dowels allow a sliding movement in the direction of the dowel axis. The dowels are normally used to transfer shear loads in any direction. A high load capacity is effectuated...

HALFEN HSD SHEAR DOWEL S YS TEM Heavy -dut y shear dowels Type selection diam. Sliding socket - Sliding in longitudinal direction e Load distribution body dowel part 609 socket Load distribution body HSD-CRET type Dowel part Sliding socket V - Sliding in longitudinal and transverse direction Load distribution body Dowels 145/145 V, 150/150 V and 155/155 V have square shaped cross sections 1) edge length of cross section g Ordering example: HALFEN heavy-duty shear dowel Load range V = Transverse and longitudinal movement P = Spot welding K = PE pipe protection cap S = Sheet metal cover

HALFEN HSD SHEAR DOWEL S YS TEM Heavy -dut y shear dowels Dimensioning Ultimate limit state: Load capacity of the additional slab border reinforcement VRd = min (VRd,1; VRd,2; VRd,max) ≤ VRd,s Design resistance of the steel dowel Design resistance of the steel box Load capacity of the concrete compression struts VEd ≤ VRd (with consideration of friction factor fμ) If a dowel will be selected from these tables, no further proofs are required. The values quoted for the maximum dimensioning resistance VRd only apply for an arrangement of the suspension reinforcement according to the table on page...

HALFEN HSD SHEAR DOWEL S YS TEM Heavy -dut y shear dowels Dimensioning VRd = min (VRd,1; VRd,2; VRd,max) ≤ VRd,s VRd,1 VRd,2 VRd,max Design resistance of the steel dowel Design resistance of the steel box load capacity of the concrete compression struts Dimensioning of the joint width f f = calculated joint width + safety supplement (approx. 1cm) Load capacity of the additional slab border reinforcement VEd ≤ VRd (with consideration of friction factor fμ) If a dowel will be selected from these tables, no further proofs are required. The values quoted for the maximum dimensioning resistance VRd...

HALFEN HSD SHEAR DOWEL S YS TEM Heavy -dut y shear dowels In-situ reinforcement bplate Stirrups on both sides as a vertical suspension reinforcement Longitudinal reinforcement parallel to the edge, placed above and below according to the bending design of the continous beam Number of stirrups Asx (fyk= 500 MPa) CRET-122(V) Advice: The reinforcement layout in the above table can be used for all cases in the load tables pages 7-8. 50% of the stirrups from the above table have to be placed on each side of the dowel.

HALFEN HSD SHEAR DOWEL S YS TEM Heavy -dut y shear dowels HALFEN Dimensioning Software For an optimised suspension reinforcement, please use the HSD-CRET design program, downloadable from: www.halfen.(→ country code) If required, a DVD with all design programs, catalogues and approvals is also available. Installation dimensions Calculation acc. to EN 1992-1-1:2008 (section 6) Minimum spacings HSDCRET- HSD- Minimum component thickness CREThmin [cm] Minimum edge distance ar,min Minimum dowel spacing aD,min VRd acc. page 7 - 8 vRd,c = (CRd,c ⋅ k ⋅ (100 ⋅ ρL ⋅ fck)⅓ + k1 ⋅ σcp) ⋅ d [kN/m] (6.2a)...

HALFEN HSD SHEAR DOWEL SYSTEM Heavy-duty shear dowels Design example - slab Design shear force: VEd = 50 kN/m Advice: All calculations of HSD-CRET dowels are done with partial safety factors according to EN 1992-1-1:2008. Slab thickness: h = 280 mm -> effective depth d = h - cn0m - diam./2 = 245 mm Advice: Diameter of the bending reinforcement perpendicular to the joint (here 10 mm) Designed joint width: f = 30 mm (20 mm + 10 mm) Advice: The designed joint width should be the maximum value that can appear during building utilization. In case of lack of detailed information it is recommended to...