Anyone know of a software that will account for varying slab thickness and openings around the column for calculating punching shear, particularly at the end of the studrails. Punching shear scia structural analysis software and design. The system consists of doubleheaded studs welded to flat rails, positioned around the column head or base. Punching shear around columns and piles are checked in version 6. Punching shear failure could occur as a result of shear stress produced by transfer of shear. Punching shear is a phenomenon where a concentrated force on a slab causes a. Details name punching shear design calculation pages format xlsx size 1 mb download method direct download download. Punching shear is a phenomenon where a concentrated force on a slab causes a shear failure cone that punches through. Punching shear design structural engineering software. Armata punching reinforcement is the first icc approved doubleheaded shear rail system made from deformed reinforced bars. Oneway shear checks are shown for illustration as twoway shear normally governs the design. However, consideration of the factored axial load along with the corresponding applied factored moments is necessary for other footing design checks such as punching shear at the maximum loaded pile, oneway shear, and flexure. One way shear is not checked by the program and additional hand calculation may be required if needed.
Punching shear checks in pile caps the structural world. 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. A number of factors may affect the modeling and formulation of punching shear. Shearail design software introduction for punching shear solution. Concrete design software frequently asked questions. Mar 27, 2018 the design calculations check the foundation in flexure, plane shear and punching shear as appropriate. I am unable to understand what is happening when i import a roof slab. Take the maximum values for punching shear in robot and used punching shear spreadsheet from the concrete center, in your screenshot you have two cases, punching shear design for edge and reentrant corners. From the above discussion we can see that the providing the shear reinforcement is the best method to solve the problem of punching shear. I know decon has a studrail design software, but it is pretty limited in what it can do and it really only does new design, not analysis of an existing conditions. Design of reinforced concrete flat slabs for punching shear.
Punching shear in safe 16 general discussion structural. Punchingshear faq safe computers and structures, inc. What is the maximum amount of nodes and load combinations. Tekla software solutions for advanced building information modeling and. Punching strength without shear reinforcement the punching shear strength of the concrete is not sufficient. For the structural components consisting of slabs, it is necessary to perform shear design on the locations with concentrated load introduction, applying the. These tools help us to calculate, investigate, analyze and design the different structural design projects on hand.
The program is able to analyse both plain and reinforced concrete structures. The shear strength is usually provided by concrete alone in order to avoid expensive shear reinforcement, therefore shear could control the footing thickness. Punching shear design calculation civil engineering. Ive always felt that there was a real opportunity in the software world for more engineer friendly punching shear reporting. Also, it is possible to apply a concentrated punching load to a slab manually.
Overview punching shear calculation applies to columnsupported slabs, classified as twoway structural. By simplifying slab reinforcement at column locations and eliminating column capitals, stirrup cages, or i beam shear heads, they enable efficient design and rapid. Slabs and flat slabs lecture 5 19 th october 2016 contents lecture 5 designing for shear in slabs including punching shear detailing solid slabs flat slab design includes flexure worked example exercise punching shear. The hdb elements with double headed ribbed studs, welded to a mounting rail, are used as shear and punching reinforcement. You can design slabs at internal, edge and corner columns by specifying the distance from the support to the slab edge. Based in ho chi minh city sai gon, vietnam, our team of draftsmen, engineers and designers have partnered with the best architects, engineers and project managers on iconic building projects in the uk, australia, dubai, vietnam and around the world.
Does the program check punching shear around columns and piles. By defining the geometrical properties of a slab supporting joint, the program will determine the shear perimeter around the support. Vcmaster is a software application for technical documentation specifically designed for engineers. This software tutorial shows how simple it is to use the shearail design software for punching shear design. Halfen punching shear reinforcement and shear reinforcement 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. The latest version of ancons shearfix software is 4. Perhaps the punching shear check is the last step to consider in the design of the pile cap. Pile supported foundation pile cap analysis and design. The overall depth of pile cap shall also be selected such that the effective depth of bottom. Punching shear is a failure of reinforced concrete slabs subjected to high localised forces. Design software in etaconform version concrete plant precast. You can design slabs at internal, edge and corner columns by specifying. Tedds engineering library november 2015 tekla tedds user.
Design of slab section in punching shear according to eurocode 2 6. 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. Ancon shearfix punching shear reinforcement system used within a slab to provide additional reinforcement around columns, ancon shearfix provides an ideal solution to the design and construction problems associated with punching shear related links. Compared to manual calculations, it helps us to achieve our read more. Top 5 structural engineering software that you should. The punching shear design must be performed for slabs and floor slabs or foundations, taking into account the slab topology available around the considered. Let us take a look at the image below an excerpt from a working. Design example of punching shear in slabs eurocode 2. 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. Slab modeling, analysis, and design procedures feature a suite of sophisticated tools and applications, couple with posttensioning, punching shear, and beam detailing, and integrate the influence of soils, ramps, columns, braces, walls rectilinear or curvilinear, and other interfacial elements.
Structural engineering software is a major part of practicing structural engineers. Universal interfaces guarantee easy data transfer, so that the output of all programs can be transposed. Take the maximum values for punching shear in robot and used punching shear spreadsheet from the concrete center, in your screenshot you have two cases, punching shear design for. The unique software concept integrates all structural design and cad software. Structurepoint, formerly the pca engineering software group, offers concrete design software programs updated to aci 31814 for concrete buildings, concrete structures and concrete tanks. The ancon design program simplifies the specification and ordering of a shearfix system.
The punching shear analysis is directly linked to any joints that has been defined as a slab support of type column in the concrete tab of a joint properties. Max frank offer a punching shear reinforcement customised design program which automatically calculates the most costeffective design solution for individual site requirements to bs 8110 and ec2. Footing design includes two shear checks per aci 318. As stated in the safe design manual, and prescribed by aci 318 requirements, safe uses 2sqrtfc for shear links rebar and 3sqrtfc for shear studs. Punching shear software structural engineering general.
The punching shear design must be performed for slabs and floor slabs or foundations, taking into account the slab topology available around the considered punching point. The module automatically determines the governing punching load from the specified load. Foundation design software structural engineering software. Punching shear analysis of reinforced concrete flat plates. 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. For structures, the lateral stability of which do not rely on. In accordance to such research, the lfem is an effective tool in global analysis and suitable for the design of reinforced concrete slabcolumn systems with the aim of. Up to four layers of longitudinal slab reinforcement. Select the design punching shear design overwrites option to ensure that punchingshear perimeters and columnpier location types are as intended. Verification of the shear capacity at the control perimeters around a rectangular column. Halfen hdb shear rails are supplied as system elements, for short delivery times, and as complete elements, which are manufactured to measure on demand.
Design for punching shear should allow for the effects of moment transfer at the columnslab junction. If the design shear ved exceeds the shear capacity vrd,c the program. This easytouse program determines the optimum design of shearfix components and generates a printable data sheet and a dxf file of the specified layout. Program for verification of punching shear resistance of concrete slabs according to en 199211 and en 19922. Tedds engineering library november 2015 tekla tedds. In the course of the punching shear design according to en 199211, it must be checked that the acting shear force v ed does not exceed the resistance v rd. Punching shear reinforcement on slab 39 one way joist 41 twoway slab analyzed by the direct design method 47. It has just been shown that the factored axial load alone is sufficient for the punching shear check at the column. 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 structura. Jan, 2017 what is the concrete contribution to punching shear when shear reinforcement is present.
Ptdesign is a leading provider of posttensioning systems, structural solutions and cad detailing. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. Like footings, it is common practice not to use shear reinforcement in pile caps. Asdip foundation is a structural engineering software utilized by engineers for design of pile caps and concrete footings, such as spread footings, strap footings, combined footings, and wall footings, per the latest aci 318 provisions this foundation design software substantially simplifies timeconsuming calculations for structural engineering design. New decon studrail brochure and updated design software. This easytouse program determines the optimum design of shearfix components and generates a. With better material properties than studs from smooth bars, armata provides more efficient design against punching shear failure in flat slabs. Punching shear how to design against punching shear forces. What is the concrete contribution to punching shear when shear reinforcement is present.
Punching shear designer, reinforced concrete slabs cads uk. Jordahl expert software for punching shear reinforcement. So for effective control of punching shear the design is necessary. Basic principles 9 14 pointload supported slabs 9 design concept 10. Max frank offer a punching shear reinforcement customised design program which automatically calculates the most costeffective design solution for. Cads punching shear designer is a software application which performs rapid and costeffective design solution of punching shear calculations for reinforced. Punching shear how to design against punching shear. Punching stresses generally arises when a concentrated load is applied to a small area of slab. Later on, hong guan 2009 applied the nonlinear layered finite element method lfem.
Aside from flexural checks, one of the most important points to consider in the design of the pile cap is the punching shear checks. Punching shear scia structural analysis software and. 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. Structural analysis software rfem and rfpunch pro addon module for punching shear design of reinforced concrete surfaces acc. Punching strength with shear reinforcement firstly, one has to check if the design shear. Safe punching shear problem software issues structural. Jordahl expert anchor channels and punching shear reinforcement. For the flat slab with the general arrangement as shown below, let us design the punching shear for column b1 given the following design information. Easy to use application for analysis of punching shear of reinforced concrete. Please note, designs generated in any shearfix software versions prior to 5. The jordahl expert punching shear reinforcement jda is used to design flat slabs, ground slabs, precast slabs and footings. Aug 14, 2018 it will show you how to consider the punching shear checks using the safe program and the punching shear capacity checks as specified by the aci code.
Usually when we design foundation safe take wall reactions as a beam with intermediate points and shows nc as punching shear ratio. This type of failure is catastrophic because no visible signs are shown prior to failure and commonly occurs in flat slab structures at column support points. For the analysis, a linearelastic model has been used. Here, you may manually adjust any parameters to meet the actual conditions of the model. If punching ratio of column on raft foundation 30 thick is 1. Create punching shear checks tekla structural designer. Jul 17, 2014 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. For structures, the lateral stability of which do not rely on the frame action between the slab and columns and in which adjacent spans do not differ in length by more than 25%, the design punching shear may be obtained by enhancing v ed by 1. Id love to see fem software that would do the following. Lrfd steel girder superstructure design example lrfd. The design program requires the following information to be inputted.
Create punching shear checks you can apply punching shear checks to flat slabs and foundation mats by using the add check command on the design tab. The design calculations check the foundation in flexure, plane shear and punching shear as appropriate. Reinforced concrete structural software includes programs for column design pcacolumn, beam design pcabeam, slab design pcaslab, wall design pcawall, mat design pcamats, foundation design. Pt design is a leading provider of posttensioning systems, structural solutions and cad detailing.
Punching shear design according to eurocode 2 in rfem. If the design shear ved exceeds the shear capacity vrd,c the program computes the necessary shear links reinforcement. Ancon shearfix punching shear reinforcement system used within a slab to provide additional reinforcement around columns, ancon shearfix provides an ideal solution to the design and construction problems associated with punching shear. Aug 14, 2017 footing design includes two shear checks per aci 318. Pretty much every firm that ive worked with has had an internally developed, excel based post processor for punching shear. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete. Punching shear calculations are provided for columnspedestals that land on concrete slabs.
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