The software enables efficient calcu lation of halfen hdbs shear rails according to eurocode 2. Cemarking according to en 10901 on hotrolled framing channels and cantilevers with declared design bearing capacity according to the european standard en 19931. They can be easily and efficiently calculated using the halfen hta software. Punching shear check at wall ends and wall corners trenno structural 19 jul 18 09.
Punching program for verification of punching shear resistance of concrete slabs according to en 199211 and en 19922. Furthermore, you can open the design program by halfen. Basics expansion joints to prevent constraint stresses 34 product features. Optional consideration of minimum moments according to en 1992. Using bespoke software, hyten can offer a complete punching shear design service that compliments both loose bar and carpet system reinforcement. A full range of shear stud lengths are available, in 5mm increments to ensure the correct placement of studs and cover in the slab is respected. Shearfix is suitable for all column shapes and is easy. The punching shear strength of the concrete is not sufficient. To facilitate orientation, a slab is always displayed with the corresponding node of punching shear. A free download of the software is available at safety and quality as a din iso 9001 certi.
The problem of punching shear, which is critical for this type of construction, can be resolved cost efficiently and dependably with the reinforcement bar schock bole. Punching hilti aktiengese lschaft fl9494 schaan 28 days desig n value strengthening layout adhesive hilti hitre 500 strengthening anchor type hzap m16 niche depth for lower anchorage hinf 40 mm maximum hei ght of shear reinforcement maxd x. Halfen international newsletter december 2017 update. Jul 29, 2018 you may find this useful what is punching shear. The shear load from the slab is transferred through the studs into the column. General information on halfendeha punching shear reinforcement. It is the users responsibility to check the input values and drawings and verify their feasibility based on current standards and approvals. The concrete will provide a certain level of shear resistance around the columns but this may need to be supplemented by punching shear reinforcement arranged on concentric perimeters. Punching shear the punching shear is a failure mechanism in structural members like slabs and foundation by shear under the action of concentrated loads. The concrete shear strength in oneway action is defined by the expression. This writing i defines the different conditions for punching shear calculation, ii presents the. On the other hand, the punching shear strength depends of the column location on the footing, either interior, edge or corner, per the expression. The hdb elements with double headed ribbed studs, welded to a mounting rail, are used as shear and punching reinforcement. Basic principles 9 14 pointload supported slabs 9 design concept 10combination of system elements 15 combinations of hdb system elements 15 installation notes 16 17 layout of.
The studs are welded to the rail at centres determined by ancons software or by a design calculation. Punching shear strength as function of slab rotation the opening of the critical shear crack reduces the strength of the inclined concrete compression strut carrying shear and eventually leads to the punching shear failure. Therefore, halfen gmbh cannot accept responsibility if the results reached with this software or cad libraries contain errors. Halfen shear rail concrete hdb e punching shear reinforcement calculation according to european technical approval eta120454. The ancon design program simplifies the specification and ordering of a shearfix system.
The sheartech doubleheaded studs are supplied to site factory welded to carrier rails at predetermined spacings in accordance with the relevant ec2 or bs8110 design standard under a bs en iso 9001. An example is the calculation of the load increment factor. Basic principles 9 14 pointload supported slabs 9 design concept 10combination of system elements 15 combinations of hdb. Halfen punching shear reinforcement and shear reinforcement. Technical data 5 type selection, dimensions 6 relevant dimensioning resistances. With hdbz punching shear reinforcement, halfen has now developed a. This easytouse program allows the optimum design to be determined and generates a printable calculation sheet, a dxf file and a parts list of the specified layout. Punching shear failure mechanism is observed in normal floor slabs, flat slabs, and in the fo. Punching strength with shear reinforcement firstly, one has to check if the design shear force v d is smaller than the maximum punching. The action of concentrated loads is on a smaller area in the structural members. Halfen punching shear reinforcement salam enterprises. Punching shear arises when a concentrated load is applied to a small area of a slab or, most commonly, the reaction of a column against a slab. Halfen hdb punching shear and shear reinforcement 4 7 hdb punching shear reinforcement 5 hdbs shear reinforcement 6 product overview 8 halfen hdb as punching shear and shear reinforcement 8 calculation.
Overview punching shear calculation applies to columnsupported slabs, classified as twoway structural. Hdbz punching shear reinforcement for foundation slabs and foundations. If punching ratio of column on raft foundation 30 thick is 1. To prevent punching of columns through concrete slabs, punching shear reinforcement, commonly in the form of doubleheaded studs or link reinforcement, is often used in the loaded areas of columns. The system consists of doubleheaded studs welded to flat rails, positioned around the column head or base. Where the reinforcement is congested hdb elements are ideal for installation from below, i. Punching shear analysis with lattice girders interface to filigran software. The software application performs the following separate calculations. Halfen software hdb shear reinforcement reinforcement. Aside from flexural checks, one of the most important points to consider in the design of the pile cap is the punching shear checks.
The software generates automatic lists of material and dxf. Halfen hdb shear rails are supplied as system elements, for short delivery. Fdb ii a new generation of punching shear reinforcement. Only icc approved structural thermal break icces esr 3799. The hdb complete elements are welded to a flat steel rail. The new htace 4022p and htace 5030p channel profiles are approved with eta160453 for use in europe and are ce marked. Punching shear force vu should be smaller than the column reaction, and similar to the value of column reaction minus column weight and load within the shear perimeter. Punching shear check at wall ends and wall corners. The basic perimeter, u 1 is at 2d eff from the column.
Numerical and graphical display of results 3d, 2d, and in sections punching shear design with or without punching shear reinforcement. Punching shear design according to eurocode 2 in rfem. Overview punching shear calculation applies to columnsupported slabs, classified as twoway structural systems. Due to the specially designed shape multi lowslip anchorage points in the concrete a component reinforced with hdbz up to 100 % more load capacity than a foundation without punching shear. With rfpunch pro, the punching shear design can be performed. Halfendeha you can use the halfendeha exportcalculationimport tool to export existing geometric data and, if necessary, supporting forces and reinforcement results of fea calculations only when working in a projectbased manner to halfen dehas calculation program, where you can calculate punching shear. In this video, we investigate how to analyze a slab for punching shear, how to design rebar and stud rails, and some theory, tips and tricks. Fastening postinstalled shearreinforcement hiltihzap. The authorisation code is required to unlock the software will be displayed after you have entered your contact details, or for email registration will be sent to your email address. Halfen shear dowel system hsd the halfen shear dowel system hsd is an application for the distribution of shear loads in construction joints. The resulting stresses are verified along defined control perimeters around the loaded area. Punching shear strength of reinforced concrete slabs without. Rtool collection structural member design rib software.
Punching shear calculation spreadsheet download link more from my sitepunching shear check as per aci31814 spreadsheetpile group. Halfen usa is excited to announce the release of its new design software for the hsd shear dowel product range. Halfen design software hdbfdb iihdbs 2729 type selection, order information, accessories 3031 tender speci. Users can manually define a specific dowel and spacing or allow the software to select the most efficient dowel. Punchingshear faq safe computers and structures, inc. Innovative punching shear reinforcement for foundations. The critical punching shear perimeter is automatically calculated and punching shear steel is designed if required. The new halfen hdbz punching shear reinforcement now allows an even more efficient and economic design of foundation slabs and single foundations. After selecting a halfen channel and a suitable bolt the calculation results can be easily copied in a list and saved in a file. Using traditional links for this is timeconsuming and expensive. In most cases, this reaction is the one from the column acting against the slab. Punching shear checks in pile caps the structural world. Shear connector rails of different manufacturers schock, halfen, jordahl are.
Aug, 2017 check a slab for punching shear using slb. Unbalanced moments mu2 and mu3 should be similar to the column moments at the top of the column times the reduction factor aci 318 gama v. Stud diameters range from 8mm to 32mm to suit any slab thickness. Halfen hdb software, which has proved its worth over numerous years, is available for optimized dimensioning. Used within a slab to provide additional reinforcement around columns, ancon shearfix is the ideal solution to the design and construction problems associated with punching shear. The provisions for punching shear design according to eurocode 2 cannot be applied efficiently without a software solution.
The shear load from the slab is transferred through the. The calculations are done in accordance with bs en 1992. Halfendeha you can use this module to transfer the existing geometry and, if necessary, the required structural reinforcement from the cad system to halfen dehas calculation program, which analyzes punching shear after you have entered all the necessary data. This is mainly to avoid nonuniform settlements and displacements due to divergent deformations. Cads punching shear designer is a software application which performs rapid and costeffective design solution of punching shear calculations for reinforced concrete flat slab structures. The schock bole is a punching shear reinforcement consisting of doubleheaded studs and anchors with spacing bars to secure correct positioning. Reinforcement systems huc stadium erfurt halfen youtube. Halfen hsd shear dowel s ys tem table of contents halfen hsdcret heavy duty shear dowels introduction. Punching shear safe 2016 tutorial example and practical. According to muttoni and schwartz,12 the width of the critical crack can.
What is a punching shear, and what are the causes and. Halfen hdb shear rails are supplied as system elements, for short delivery times, and as complete elements, which are manufactured to measure on demand. Halfen punching shear reinforcement the hdb elements with double headed ribbed studs, welded to a mounting rail, are used as shear and punching reinforcement. This calculation programs and cad libraries are products of halfen gmbh, langenfeld, germany. Mar 10, 2019 the halfen hucuniversal connection system is a family of components that together provides very effective solutions for the transfer of high structural loads into concrete. Please enter the product key displayed when you start the software. Hdb shear reinforcement mdhaszhdbznp halfen archiup. Hsdcret shear dowels with longitudinal movement 7 hsdcret v shear dowels with. Ancon punching shear reinforcement system shearfix. Punching shear resistance is, as the article states, a planar phenomenon rather than a point stress phenomenon. Punching shear design with definition of perimeters dlubal software. Integration of design software by the halfen shear reinforcement rails producer. Hdb punching shear reinforcement 5 hdbs shear reinforcement 6 product overview 8 halfen hdb as punching shear and shear reinforcement 8 calculation. With hdbz punching shear reinforcement, halfen has now developed a solution specifically optimized for application in foundations.
Innovative punching shear reinforcement for foundations concrete. Ancon punching shear reinforcement system shearfix the system consists of doubleheaded studs welded to flat rails the weight of a slab supported on a column induces shear stresses in the slab, which may result in the column punching through the slab and destruction due to the punching and not bending. Punchingshear force vu should be smaller than the column reaction, and similar to the value of column reaction minus column weight and load within the shear perimeter. This is why an improved design concept was derived for the hdb shear rail punching reinforcement based on current punching shear tests and incorporated into the european technical approval eta120454. Halfen punching shear reinforcement and shear reinforcement halfen hdb punching shear and shear reinforcement 4 7. As we all know, punching shear is a concentrated load causing shear stress on the section around the load and this load should be resisted by the structural member from where the concentrated load or the reaction is rested. Ht shear kit is a simple and costeffective means of providing punching reinforcement. The punching shear is a failure mechanism in structural members like slabs and foundation by shear under the action of concentrated loads.
Punching shear designer, reinforced concrete slabs cads uk. The new software covers the full range of shear dowels, hsd and hsd ultra, for slab to slab connection and wall to slab. The program allows analysis to bs en 1992 eurocode 2. Sheartech punching shear reinforcement engineered solutions.
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