Basic principles 9 14 pointload supported slabs 9 design concept 10combination of system elements 15 combinations of hdb. The ancon design program simplifies the specification and ordering of a shearfix system. Create punching shear checks tekla structural designer. Overview punching shear calculation applies to columnsupported slabs, classified as twoway structural. Punching shear analysis of reinforced concrete flat plates. The design of punching shear reinforcement is typically carried out in accordance with the recommendations contained in bs en 1992 eurocode 2. Ancon cd simplifies punching shear reinforcement design. Shearfix design software archives specification product. The resulting stresses are verified along defined control perimeters around the loaded area. The latest version of ancons shearfix software is 5. Punching shear calculations can now be carried out to eurocode 2 and bs8110 using the latest version of ancons free design software, available to download from uk.
Free software is available from ancon that simplifies the design of punching shear reinforcement. Punching stresses generally arises when a concentrated load is applied to a small area of slab. Punching strength with shear reinforcement firstly, one has to check if the design shear force v d is smaller than the maximum punching. Columnfloor intersection and flatslab construction. My understanding is that shear head in this context are open steel sections cast into the slab itself. Ancon has released an enhanced version of its popular shearfix design software that enables engineers to maintain a flat concrete slab at column heads by reinforcing the area against punching shear with a caresapproved, prefabricated, studrail system. 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. Its use negates the need for any localised thickening of the slab with features such as downstand beams or enlarged column heads.
Ancon further enhances its shearfix studrail calculation. Punching shear is a phenomenon in flat slabs caused by concentrated support reactions inducing a cone shaped perforation starting from the top surface of the slab. Decon studrails are a proven, costeffective solution to resist punching shear at slabcolumn connections in elevated slabs and foundation mat slabs, as well as bursting stresses in posttension anchorage zones. Ancon partners with bentley systems for 3d modelling. The latest version of ancons shearfix software is 4. Mushroom construction was introduced around 1900 as a way of avoiding the arrangement. Links can be timeconsuming to both design and install. Shear load connectors reinforcing bar couplers reinforcement continuity systems punching shear reinforcement insulated balcony connectors refractory fixings 3 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.
Studs are manufactured in five diameters 10, 12, 14, 16, 20 and 25 mm from cares. Shearfix punching shear reinforcement ancon australia. Free software is available from ancon to simplify the design of punching shear reinforcement. The software will check your application for punching shear requirement and provide details of any required shearfix rails including a dxf file detailing the arrangement. 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. 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. Although generally preceded by flexural failure, punching shear is a brittle failure mode and the risk of progressive collapse requires a higher safety class in structural design punching shear design. Punching shear calculations are provided for columnspedestals that land on concrete slabs.
From the above discussion we can see that the providing the shear reinforcement is the best method to solve the problem of punching shear. An example is the calculation of the load increment factor. Ancon is proud to sponsor two industry conferences this year and will showcase an innovative range of structural fixing. 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. Ancon has released an enhanced version of its popular shearfix design software that enables engineers to maintain a flat concrete slab at column heads by reinforcing the area against punching shear with a caresapproved, prefabricated, studrail system this eurocode 2 compliant software automatically calculates the optimum design of shearfix punching shear reinforcement for virtually any. Punching shear reinforcement ancon shearfix consists of doubleheaded studs welded to flat rails. Also, it is possible to apply a concentrated punching load to a slab manually. System is manufactured to order to suit application. A shearfix system is easily detailed with ancon s punching shear reinforcement design program see pages 67. Consult ancon building productss entire punching shear reinforcement. Shearfix designed to bs en 1992 can also be applied to structures designed to bs 8110.
So for effective control of punching shear the design is necessary. Design software ancon shearfix design software is available to download free from uk. Ancon shearfix is designed to suit the specific requirements of each application. Punching shear reinforcement ancon shearfix is used within a slab to provide additional reinforcement from punching shear around columns. Ancon has released an enhanced version of its popular shearfix design software that enables engineers to maintain a flat concrete slab at column heads this is achieved by reinforcing the area against punching shear with a caresapproved, prefabricated, studrail system. On the other hand, a limited number of analytical work is done using selfdeveloped programs, commercial software, or by utilizing mathematical model. Ancon shearfix 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. Punching failure comparison with shear links ancon shearfix offers many advantages over loose shear links. Ancon provides free software to determine the optimum system design. The system consists of doubleheaded steel studs welded to flat rails and is designed to suit the load conditions and slab depth at each column using free calculation software from ancon. The module automatically determines the governing punching load from the specified load. This is a shear stud rail system, sometimes called ssr on drawings. Ancon shearfix is installed within a concrete slab to reinforce column heads against punching shear and consists of doubleheaded steel studs welded to flat.
The ancon shearfix design program calculates radial and orthogonal layouts of the shear stud rails required to reinforce concrete slabs at column heads. Ancon punching shear reinforcement system shearfix. It is the users responsibility to check the input values and drawings and verify their feasibility based on current standards and approvals. As 3600 commentary on punching shear asnzs aunz code. Ancon building products 18th december 2018 ancon has released an enhanced version of its popular shearfix design software that enables engineers to maintain a flat concrete slab at column heads by reinforcing the area against punching shear with a caresapproved, prefabricated, studrail system. The system consists of doubleheaded studs welded to flat rails, positioned around the column head or base. Ancon shearfix stud rail by ancon building products. Shearfix punching shear reinforcement design sheet to ec2. Punching shear design according to eurocode 2 in rfem. Ancon shearfix is designed to suit the specific requirements of each. Punchingshear faq safe computers and structures, inc.
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. Enhanced design program for punching shear reinforcement. The basic perimeter, u 1 is at 2d eff from the column. Therefore, halfen gmbh cannot accept responsibility if the results reached with this software or cad libraries contain errors. Shearfix punching shear reinforcement ancon shearfix 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. When you apply a punching shear check to a point load, you must manually define the punching shear check z axis orientation.
The punching shear strength of the concrete is not sufficient. Punching shear is a phenomenon where a concentrated force on a slab causes a. Ancon shearfix punching shear reinforcement system ancon. This eurocode 2 compliant software automatically calculates the optimum design of shearfix punching shear reinforcement for. The heads are hot forged to three times the diameter of the bar. Shearfix consists of doubleheaded steel studs welded to flat rails. The two axis systems are locked together, so if the column is rotated, the punching check axes also rotate. Ancon enhances shearfix studrail calculation program. Ancon launches new eurocodecompliant design program uk. Ancon shearfix punching shear reinforcement infrabuild.
Ancon shearfix is installed within a concrete slab to reinforce column heads against punching shear. The program allows analysis to bs en 1992 eurocode 2. 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. Doubleheaded steel studs, welded to flat steel rails, positioned around a column headbase to provide additional reinforcement against punching shear. By simplifying slab reinforcement at column locations and eliminating column capitals, stirrup cages, or i beam shear heads, they enable efficient design and rapid. Unit 1, venture road, lawn farm business park, woolpit, suffolk, ip30 9rz. Ancon enhances shearfix studrail calculation program 25 oct 2018 ancon has released an enhanced version of its popular shearfix design software that enables engineers to maintain a flat concrete slab at column heads by reinforcing the area against punching shear with. 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.
Ancon shearfix is suitable for flat plate construction and offers advantages over loose. The critical punching shear perimeter is automatically calculated and punching shear steel is designed if required. It is used within a slab to provide additional reinforcement around columns, protecting the slab from the effects of punching shear. Studs are manufactured in five diameters 10, 12, 14, 16, 20 and 25 mm from caresapproved b500c reinforcing bar. Many translated example sentences containing shear reinforcement germanenglish dictionary and. The provisions for punching shear design according to eurocode 2 cannot be applied efficiently without a software solution. 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. The latest version of ancon s shearfix software is 4.
Punching shear reinforcement design program ancon ltd. Ancon further enhances its shearfix studrail calculation program. Download product pack request a call bookmark note compare oneclick quote request a quote. Punching shear how to design against punching shear. In the download area the new calculation software for hdb punching shear reinforcement is available for download. Ancons design method for punching shear reinforcement has been integrated into the bentley systems 3d modelling software for reinforced and posttensioned concrete floor slabs, ram concept. Bs en 1992 eurocode 2 the design of punching shear reinforcement is typically carried out in accordance with the recommendations contained in bs en 1992 eurocode 2. The new halfen hdbz punching shear reinforcement now allows an even more efficient and economic design of foundation slabs and single foundations. You can do this in the properties window by specifying the point load orientation in relation to the global y axis. Products for structural concrete accommodating shear shear load connectors. Punching shear reinforcement ancon building products pdf. Zip shear load connector all dxfdwg cad files zip 3. Even in the early days of concrete structures, the problem of punching shear at the column head area was already recognized fig.
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