HALFEN UNIVERSAL CONNECTION HUC 10-E CONCRETE. NEW! Approval for shear forces up to 3390 kn/m

Transcription

1 HALFEN UNIVERSAL CONNECTION HUC 10-E CONCRETE NEW! Approval for shear forces up to 3390 kn/m

2 H A L F E N H U C U N I V E R S A L CO N N E C T I O N System description HSC-B Concrete Steel Connection Cast in components consist of bars with female connections. The bars are accurately located in the concrete with a positioning plate page 3. HSC-B Concrete Steel Connection The external face plate of the system is supplied pre-drilled to match the required connection pattern of the cast-in bars. It is used as a welded end plate for structural steel beams or as part of the connection hardware for bracing systems. authority ng Z o N t pr. Ap DIB ed The HALFEN HUC Universal Connection System is a family of components that together provides very effective solutions for the transfer of high structural loads into concrete. The components of the HUC family comprise of the HSC-B Concrete Steel Connection System and the HSCC Steel Corbel System. The load range and adaptability of these components enables the HUC system to offer a huge range of connection applications. These include connections for steel beams, steel corbels, and anchor points for both DETAN Tension Rods, and cable bracing systems. Buil di HALFEN Universal Connection System ov appr PREVIEW HALFEN HSCC Steel Corbels Further application examples page 4 HALFEN HSCC Steel Corbels Available in 34 pre-engineered sizes HALFEN HSCC Steel Corbels are also connected to concrete using the cast-in female bars of the HSC-B Concrete Steel Connector. HSCC Steel Corbels provide up to double the load capacity of concrete corbels and take up less room. This means that the construction height normally allowed for support corbels can be significantly reduced page 15. FEd epo st r e t 1 e Typ in 201 rt Load range FEd 115 kn to 2600 kn. FEd FEd German Building Authority Approvals Building authority approval Z for HALFEN HSC-B Concrete Steel Connector Type test report in 2011 for HALFEN HSCC Steel Corbels Building authority approval Z for HALFEN HSC Stud Connector Building authority approval Z for HALFEN HBS-05 Screw Connection HALFEN HUC 10-E

3 The advantages at a glance HALFEN HSC-B Concrete Steel Connection is a high load solution for securely connecting structural steel components to concrete. The system is designed to safely support bending moments, plus tension, and shear loads. It is approved by the German building authority. Easy design Simple verification of load bearing capacity using tension-shear interaction diagrams The system features extremely short anchorage lengths to allow secure connections to shallow concrete elements Building authority DIBt Appr. No. Z approved Time and cost saving Accurate and simple location of the female bars to the concrete formwork using a positioning plate no holes through the formwork are needed Site welding work is avoided. HSC-B steel face plates are accurate laser cut units that are designed to be accurately factory assembled to structural steel Easy bolted connections Adaptable to many applications Secure transfer of tension loads, shear loads and bending moments Suitable for non-predominantly static loads Single and two-sided connections available Bent anchor bars for thin and specially shaped concrete elements also available Can be used with almost any reinforcement pattern Several types of structural component can be supported e.g. steel corbels, beams, DETAN Tension Rods and bracing cables Environmentally focused Components are available in hot dip galvanized (fv), electro-zinc plated (gv) or in stainless steel (A4) material to match corrosion protection with environmental conditions. The screw connection allows an easy recycling of the material. Suitable for non-predominantly static loads HALFEN HUC

4 Application examples HALFEN HSC-B Concrete Steel Connector The laser cut HSC-B face plate enables the accurate factory manufacture of structural steel components especially steel beams. The prefabricated steel components are then connected to the structure on site using simple bolted connections to cast-in female bars, which have been accurately located in the concrete using a positioning plate. Fig.: single- and double-sided steel beam connections to reinforced concrete columns or concrete walls HALFEN HSC-B Concrete Steel Connector with HSCC Steel Corbels Reinforced concrete beam bearing on a HALFEN HSCC Steel Corbel page 15 Crane girder with HALFEN HSCC Steel Corbel Further application examples with HSC-B HSC-B face plate with welded connection flange for DETAN Tension Rod HSC-B System with special connection for timber beam Tension cable connection using HSC-B Concrete Connection System HALFEN HUC 10-E

5 Installation example HALFEN HSC-B Concrete Steel Connector using HSC-B SH female bars in 2 groups of 4 to form a connection for a steel beam to a reinforced concrete column. 1. Removal of thread protector 7. After the concrete is poured and the formwork removed the threads should be protected from corrosion by replacing the thread protector. 4. The positioning plate with its attached female bars is attached either with a magnet to a steel formwork, or by nailing to timber formwork. 2. Connection of the HSC-B SH female bars to the positioning plate using flat headed bolts. 5. The column and additional reinforcement is positioned according to the design of the structural engineer see also page The structural steel beam with HSC-B face plate can be bolted into position. Alternatively: The positioning plate can be mounted flush if drilling the formwork is preferred 3. Cutting and fitting of self adhesive foam sheet to form a recess in the concrete at the connection location. When used with steel formwork a magnet is located in the middle of the positioning plate. Accessories page 7 6. The female bars should be securely wired to the column reinforcement Positioning plate Formwork More detailed installation information is provided online. Available at HALFEN HUC 10-E 5

6 Product overview HSC-B FP Face Plate t c Differing edge distances for the bolt holes in the positioning and face plates. Positioning plate t p = 3mm Face plate 5 mm 5 mm h c h p u To order please provide a sketch with the following information. Positioning plate: Dimensions b p and h p, plus position and diameters of bolt, and nailing holes. Please also state the finish required. Face plate: Dimensions b c, h c, t c, plus position and diameters of the bolt holes. Please also state the material required. d s HSC-B SH with die forged head. Especially suitable for short anchoring lengths. d s b c HSC-B SD especially suited for two-sided connections to columns and walls. L L HSC-B Positioning- and face plates P /FP Type Finish Positioning plates HSC-B P Hot dip galvanized [fv]/ Electro-zinc plated [gv] Face plates HSC-B FP Mill finish HSC-B SH female bar with anchor head Type d s L Hot dip galvanized [fv] Stainless steel [A4] Electro-zinc plated [gv] HSC-B SH HSC-B SH HSC-B SH Finish applies to exposed female threaded connection sleeve. Bars are mill finish carbon steel HSC-B SD double sided female bar Type b p d s L HSC-B P Positioning Plate Hot dip galvanized [fv] Recommendation: For easy installation use a positioning plate with a slightly larger footprint than the face plate. i.e. b p = b c + 10 mm, h p = h c + 10 mm (to give 5 mm clearance all around) Stainless steel [A4] Electro-zinc plated [gv] HSC-B SD HSC-B SD HSC-B SD Finish applies to exposed female threaded connection sleeve. Bars are mill finish carbon steel Female bar diameter (d s ) and length (L) are determined by concrete component sizes and calculation (see pages 9 14). Dimensions d s and L are incorporated into the type code for ordering e.g. HSC-B SD is a 16 mm diameter two-sided connection bar 400 mm long HALFEN HUC 10-E

7 Product overview d s HSC-B S especially suited for connections to slabs. L HSC-B S female bar Type d s L Hot dip galvanized [fv] Stainless steel [A4] Electro-zinc plated [gv] HSC-B S HSC-B S HSC-B S Finish applies to exposed female threaded connection sleeve. Bars are mill finish carbon steel. x HSC-B SB bent female bar Type d s L/x/y/d Br / Hot dip galvanized [fv] Stainless steel A4 Electro-zinc plated [gv] HSC-B SB-16.../.../.../ HSC-B SB-20.../.../.../ y d Br HSC-B SB-25.../.../.../ Requires statements for dimensions and bending design. Recommended d Br 10 d s Standard bending angle = 90, if not differently stated. Finish applies to exposed female threaded connection sleeve. Bars are mill finish carbon steel. d s HSC-B SB especially suited for connections to columns or walls. Female bar dimensions are determined by concrete component sizes and calculation (see pages 8 14). Dimensions are incorporated into the type code for ordering. E.g. HSC-B SB-16/300/800/180/90 is a 16 mm diameter connection bar 300 x 800 mm bent at 90 degrees with a 180 mm d Br dimension. Accessories HSC-B FI Flat-headed assembly bolt for positioning plate 3 mm head Article-name type nominal size Nominal size Length L HSC-B FI M M HSC-B FI M M HSC-B FI M M HSC-B SE Sealing accessories for concreting Article name Description HSC-B SE Foam sheet one-sided self adhesive 15 x 15 mm, length 1000 mm Installation Variations Application with sliding formwork: Positioning plate is recessed installed with flat headed bolts. Application with drilled formwork: Positioning plate is flush to formwork. 3 mm foam sheet (shuttering aid) 3 mm positioning plate L Face plate L Face plate 3 mm positioning plate 2010 HALFEN HUC 10-E 7

8 Design and dimensioning following German approval Z The regulations of the German approval cover the alignment of HSC-B in the structural concrete member, plus the dimensioning and constructional requirements. The regulations are referenced in the following paragraphs and they apply to both single- and two-sided connections. In addition, the capacities of connected steel and concrete structural components, plus the connecting bolts have to be verified. Materials Normal weight concrete, class C20/25 up to C70/85 HSC-B-bar: BSt 500 S Diameters mm Corrosion protection of the sleeves Hot dip galvanized (fv) Stainless steel (A4) Electro-Zinc plated (gv) Stress and resistance Predominantly and not predominantly static loads Yield strength of reinforcement steel f yd = f yk = 500 N/mm ² = 435 N/mm² s 1.15 Fatigue resistance values of HSC-B female bars: Hole pattern The quantity of HSC-B bars are selected according to the connection requirements. Single and multilayer anchorage patterns are possible, but the minimum distances given in the table below should be considered. The maximum hole diameters given in the table below for the HSC-B face plate, (or similar component) should also not be exceeded. Dimensions, geometric regulations HSC-B Bolt Minimum distances d s [-] a ij,edge a ij u hole diam. max. d L 16 M M M Bolt lengths The length of the bolts selected for the connection of the structural steel component should account for a minimum thread engagement of 1 d s and maximum thread engagement of L 1 with the female bar. d L min 1 d s The maximum bolt engagement depth L 1 (table below) is determined by the anchor s threaded sleeve size. L 1 Maximum bolt engagement depth HSC-B d s L Stress ranges for N = : Δ RSK = 80 N/mm² for d HSC-B = 16 mm and d HSC-B = 20 mm Δ RSK = 70 N/mm² for d HSC-B = 25 mm u Hole pattern minimum distances Stress exponents by Wöhlerline: k 1 = 3.5 for N k 1 = 3 for N 10 7 k 2 = 5 a ij,edge a ij a ij a ij a ij,edge Detailed dimensioning example available at HALFEN HUC 10-E

9 Design and dimensioning following German approval Z Geometry a c 1 1 F Ed H Ed h c Z Ed D Ed V ij,ed V Ed, N Ed, M Ed z = 0.9 d d hc Z Ed D Ed V ij,ed ah z = 0.9 d d hc V ij,ed b c V fr,ed V ij,ed V fr,ed b col 1 (Dim. section 1-1) 1 (Dim. section 1-1) Actions on the joint Static forces occurring in the joint between positioning and face plate (Dimensioning section 1-1) have to be determined. Universal steel member V Ed N Ed M Ed Corbel as attached structural member V Ed = F Ed H Ed 0,2 F Ed (if friction forces resulting from restraint deformations can not be excluded) Tensile force Z Ed, Compressive force D Ed Z Ed = M Ed z + N Ed (d h c) z Z Ed = V Ed a c z + H Ed (a H + z) z Lever arm of internal force z = 0.9 d M Ed D Ed = z D Ed = V Ed z a c Positioning plate: The positioning plate is not considered in the calculation. Its standard thickness is 3 mm. In some conditions a vent hole 4 mm diameter should be incorporated to aid the concrete casting process. The plate should have some level of corrosion protection. Dimensioning of the attached structural component: The attached component should be designed according to the appropriate standard e.g. DIN Additional information page 8. Corrosion protection is provided by galvanizing according to DIN EN ISO Friction The load bearing proportion of friction V fr,ed,inf may be activated providing that the surfaces of positioning plate and face plate are suitable for friction transfer. If it is not suitable, the load bearing proportion of friction may not be used (see table). V fr,ed,inf = D Ed μ inf for verification of bolts, threaded sleeves, and local concrete failure V fr,ed,sup = D Ed μ sup for verification of concrete edge failure Friction coefficients μ inf μ sup friction proportion activatable friction proportion not activatable For verifications in ULS HALFEN HUC 10-E 9

10 Design and dimensioning following German approval Z N ij,ed Tension load per threaded sleeve from the bolt V ij,ed Shear load per threaded sleeve from the bolt n tie Number of bolts in tension n tot Total number of bolts A sp Cross sectional area per bolt M = 1.1 (Partial safety factor) Static actions: N ij,ed = Z Ed V n ij,ed = (V Ed V fr,ed,inf ) tie n tot Dimensioning of the bolts (N-V interaction acc. to DIN ) Resistances: N ij,rd = min f y,b,k A Sp 1.1 M f u,b,k V ij,rd = A Sp a A Sp 1.25 M f u,b,k M Cross sectional areas of the bolts Diameter A sp [mm²] M M M Interaction verification: N ij,ed N ij,rd 2 + V ij,ed V ij,rd According to DIN interaction verification may be omitted, if N ij,ed /N ij,rd 0,25 or V ij,ed /V ij,rd 0,25 Recommendation: determine the number of bolts in the pre-selection graphs shown on pages 11 and 12. Resistance parameters of the bolts Classification f y,b,k [kn/cm²] f u,b,k [kn/cm²] a Threaded sleeve dimensioning (elastic - plastic method acc. to DIN ) Each size of threaded sleeves can be checked using the limitation curves in the graph below. The capacity of the threaded sleeve is confirmed if the acting variables V ij,ed, N ij,ed stay below the confines of the curve. The load bearing capacity of the reinforcement bar attached to the threaded sleeves also has to be checked. Graph plots the design values allowed under the German approval for the threaded sleeves of the HSC-B anchors Nij,Rd [kn] HSC-B HSC-B 16 HSC-B V ij,rd [kn] HALFEN HUC 10-E

11 Pre-selection The performance per HSC-B anchor is determined by: The threaded sleeve. Its headed /reinforcing bar The bolts used to connect the structural components to the threaded sleeve. HSC-B 16 Load range graph Indicates the upper limits of one sleeve with the headed/reinforcing bar and varying grades of M16 connecting bolts. The load capacity of the sleeve and the yield value (F yd ) of the attached anchor/reinforcement must be analysed in comparison to the load capacity of the bolts used. The load capacity of the bolts will vary according to the strength grade selected. Nij,Rd [kn] F yd, 16 = 87.4 kn M M To simplify pre-selection, the range of these components are combined in the following graphs. The yield force of the headed /reinforcing bar anchor is determined on the basis of F yd = 435 N/mm², while load bearing capacities of the different bolt grades bolts follow DIN (see page 10). 60 HSC-B M M V ij,rd [kn] HSC-B 20 Load range graph Indicates the upper limits of one sleeve with the headed/reinforcing bar and varying grades of M20 connecting bolts. Nij,Rd [kn] F yd, 20 = kn M M HSC-B M M V ij,rd [kn] 2010 HALFEN HUC 10-E 11

12 Pre-selection HSC-B 25 Load range graph Indicates the upper limits of one sleeve with headed/reinforcing bar and varying grades of M27 connecting bolts. Nij,Rd [kn] F yd, 25 = kn M M HSC-B M M V ij,rd [kn] Concrete design and dimensioning following German approval Z HSC-B threaded sleeve dimensions d s L M S w d s S w L M The maximum shear force capacity of the steel connection max V Ed is determined by the load capacity of the concrete edge. Local concrete failure Action: shear force per sleeve V ij,ed ( page 10) Resistance per sleeve: V ij,c,loc,rd = 1.3 S w ² (f c R p,0.2 ) 0.5 c c = 1.5 S w = wrench size ( table) f c = f ck,cube 60 N/mm² R p,0.2 = 440 N/mm² (Characteristic tensile yield strength of the sleeve material) V ij,ed Verification: 1.0 V ij,c,loc,rd Concrete edge failure Action: V con,ed = (V Ed + V fr,ed,sup ) 2 Friction proportion V fr,ed,sup ( page 9) Local concrete failure Max V Ed in kn per meter face plate width d s C20/25 C30/37 C50/ These table values have to be reduced corresponding to the resulting bending moment by 0.2 M Ed / (0.9 d). Resistance: V con,rd = 15 c b c L M f ck 0.25 in [N] = 0.85 c = 1.5 f ck 50 N/mm² b c = face plate width of the attachment member L M = sleeve length table Verification: V con,ed V con,rd 1.0 Concrete edge failure HALFEN HUC 10-E

13 Concrete design and dimensioning following German approval Z Primary reinforcement preventing tensile splitting The primary reinforcement preventing tensile splitting is provided by the first stirrup directly below each row of threaded sleeve anchors in both the tensile and in the compression zone. Minimum diameter for stirrups and longitudinal reinforcement HSC-B d sw,2 d sl,edge d sl,bet A sw,1 = 0.25 V Ed S w n tot a ij,max f yk n tot = total number of bolts S w = wrench size, table page 10 a ij,max = maximum distance between two sleeves in one row 2. Secondary reinforcement preventing tensile splitting Secondary reinforcement preventing tensile splitting is provided by the stirrups positioned in both the tension and compression zones. The stirrups are spaced according to the minimum distances in the area x sw shown in the figure. Minimum stirrup diameters d sw,2 are provided in the table above. A sw,2,tie = 0.25 V Ed 2 1 a ij b col 1.15 f yk A sw,2,strut = 0.25 V con,ed 1 a ij b col 1.15 f yk b c A sl,edge A sl,bet a ij Minimum constructional distances [cm] xsw = 2/3 bc xsw = 2/3 bc a ij = distance between two sleeves in one row b col = width of the reinforced concrete member V con,ed = page 12 b col Longitudinal reinforcement A minimum level of longitudinal reinforcement A sl,edge and A sl,bet has to be positioned in the concrete between the threaded sleeve bars. Minimum bar diameters are shown in the table above. This reinforcement has to be anchored above and below the steel member. Tensile zone stirrups (tie) Positioning of longitudinal reinforcement and reinforcement to prevent tensile splitting Compression zone stirrups (strut) 2010 HALFEN HUC 10-E 13

14 Concrete reinforcement design and dimensioning following German approval Z Anchorage of tension connection The position of the tension anchor relative to the rear longitudinal column reinforcement is critical (see illustrations). Recommendation: Use headed female anchors rather than bars (very simple to calculate). See German approval Z and separate catalogue HALFEN HSC Stud Connector, which can be downloaded at Position of headed female anchor as tension connection d Br 10 d s Position of bent female anchor as tension connection Text for invitation to tender HALFEN HSC-B Concrete Steel Connection comprising cast-in female bars for connecting steel structural members; positioning plate for accurate location of the female bars; and face plate connection to be incorporated into the supported structural component, suitable for predominantly static and non-predominantly static loads, suitable connection method to structural concrete for any structural steel component subject to bending moments, tension loads, and shear loads, available with rectangular anchor heads, for minimum anchorage lengths, bar material BSt 500 S type of bar... corrosion protection... diameter... length... positioning plate and face plate acc. to adjacent drawing, or equal, delivery and assembly acc. to the manufacturer s installation instructions. Example: with Steel beam HALFEN HUC 10-E

15 HALFEN Steel Corbel Connection The advantages at a glance HALFEN HSCC Steel Corbel Connections are a range of standard type tested corbels based on the HSC-B Concrete Steel Connection. They securely transfer tension and shear loads between attached structural components. HSCC Steel corbels have up to double the capacity of reinforced concrete corbels. They require smaller beam recesses which enable higher load bearing capacities for the supported beams. As a result the connection dimensions and building height can be reduced significantly. Reduced connection height resulting from smaller beam recesses Type test report in 2011 Optimised construction sequence Easy to handle low weight components Straightforward bolted assembly Immediately loadable connection Avoids formwork drilling Replaces concrete corbels so simplifying formwork and transportation of precast structural components Universally applicable Type tested range to support loads from 115 kn up to 2600 kn substantially reducing design time. Suitable to support components from walls, columns, and other concrete structural elements. Accurate installation using HSC-B positioning plate Suitable for non-predominantly static loads Environmentally focused Components are available in hot dip galvanized (fv), electro-zinc plated (gv) or in stainless steel (A4) material to match corrosion protection with environmental conditions. The screw connection allows an easy recycling of the material HALFEN HUC

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