Codeparameter, aci, eccs, csa, euro code 2, bs8110, ceb fib. Civil engineering spreadsheet collection 2018 update. The tests results were compared with the punching shear models in aci 318, aci 440, eurocode 2, bs 8110, cebfib mc90, jsce, and a number of models proposed in the. Code of practice for design and construction ics 91. Although used for most civil engineering and building structures, bridges and waterretaining structures are covered by separate standards bs 5400 and bs 8007. Punching shear analysis of reinforced concrete flat plates. Shearfix punching shear reinforcement technical approval shearfix has been evaluated by uk cares for use in reinforced concrete slabs and footings designed in accordance with bs en 1992 eurocode 2.
For the purposes of this part of bs 8110, the definitions given in bs 8110 1 apply, together with the following. Bs 8110 details how deflections and the accompanying crack widths may be calculated. Punching shear twoway shear beam shear oneway shear minimum reinforcement in the following, the values in square brackets are defaults of the program. The latter is based on the critical shear crack theory csct of muttoni which. Punching shear reinforcement asnzs aunz code issues. Column design as per bs8110 free download as powerpoint presentation. This paper compares design provisions for punching shear at internal columns in the superseded british standard bs8110, eurocode 2 ec2 and fib model code. Nov 20, 2019 before designing a beam, first, we need to find the bending moments and shear forces of the beam section through an analysis.
Aci 31805, cepfip mc 90, and bs 811097 methods from the punching shear. However, most previous studies on the punching shear strength of steelfiberreinforced concrete flat slabs had presented empirical formulas based on experimental results. This approximate method for rectangular beams is based on permissible ratios of spaneffective depth. Bs 8110 is a code of practice for the structural use of concrete. We strongly recommend the shear stud design is verified against an alternate standard, such as bs 8110 or bs en 1992, eurocode 2. This paper compares design provisions for punching shear at internal columns in the superseded british standard bs 8110, eurocode 2 ec2. Apr 14, 2018 a spreadsheet is a computer application that simulates a paper worksheet where becoming increasingly popular in solving engineering related problems. Design of reinforced concrete slabs 103 calculated punching shear stress at perimeter ui shear force per unit width for bending about xaxis shear force per unit width for bending about yaxis maximum crack width mm depth of neutral axis from compression face distance from edge in ldirection to start of a yield line. But for rectangular beams some simplified procedures may be used to satisfy the requirements without too much effort. Holding down bolts design spreadsheet to bs 59501, 8110 1 spreadsheet for designing holding down bolts to bs 5950, bs 8110 and concrete society advice note no 5. Specialists in punching shear reinforcement design manual to bs8110.
Jan 07, 2017 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. 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. The punching shear strength of flat slabcolumn connections calculated using the aci code was found to be. We strongly recommend the shear stud design is verified against an alternate standard such as bs en 199211 eurocode 2 or bs 8110. Bs 8110 part 01 is one of the most commonly used standards, and the method expressed in the code can be understood very easily compared guides given for. The punching shear is a failure mechanism in structural members like slabs and foundation by shear under the action of concentrated loads. 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. The shear capacity of the slab is checked against the design shear forces at the critical shear perimeter refer to as 36002009 for further details on determining the critical shear perimeter and if required. Investigations on the punching behaviour of reinforced. For example, when we design for bending, in bs 8110 part 01 1997, we can see a factor of 0.
Max frank limited offers the following services and support for shearail in house design service, using a customised design program which. Punching shear capacity of double layer frp grid reinforced slabs. Bs 8110 is a british standard for the design and construction of reinforced and prestressed concrete structures. The relevant committee of the british standards institute considers that there is no need to support bs 8110 as the department for communities and local government have indicated that eurocode 2 is acceptable for design according to the building regulations. Excel, for example, is a powerful spreadsheet with vba robust programming. This limit was extensively exceeded by the shearreinforced specimen df3. The action of concentrated loads is on a smaller area in the structural members. Rcc2000 spreadsheets for concrete design to bs 8110 and ec2. For concrete subjected to flexure or axial loads, a factor of 1. Bs 8110 design shear construction solutions a division of arcelormittal kent wire limited table 3 form and area of shear reinforcements in beams value of. Sep 03, 2011 design of reinforced concrete slabs 103 calculated punching shear stress at perimeter ui shear force per unit width for bending about xaxis shear force per unit width for bending about yaxis maximum crack width mm depth of neutral axis from compression face distance from edge in ldirection to start of a yield line.
In most cases, this reaction is the one from the column acting against the slab. Design manual to bs8110 bs8110 general detailing rules. The program allows analysis to bs en 1992 eurocode 2. Pdf punching shear analysis of reinforced concrete flat plates. Design rules have been presented9 for application of british standard bs 8110 to stud design for.
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. Shearail prefabricated punching shear reinforcement system, which is bs 8110 and ec2 compliant, enables site work to be carried out far more effectively and efficiently than traditional loose links, making it ideal for complex project management. Apr 28, 2020 alternatively, a spreadsheet could be used e. The shear capacity of the slab is checked against the design shear forces at the critical. This paper compares design provisions for punching shear at internal columns in the superseded british standard bs 8110, eurocode 2 ec2 and fib model code 2010 mc2010. Design results of rc members subjected to bending, shear, and. But they advise that the design be verified against bs 8110 or bs en 1992, eurocode 2. It is the only proven punching shear solution with both cares technical approval and bba certification. Consideration on punching shear strength of steelfiber. For the purposes of this part of bs 8110, the definitions given in bs 81101 apply, together with the following.
Mc2010 is based on the critical shear crack theory proposed by muttoni, which relates shear resistance to the width of the socalled critical shear crack which depends. Punching strength with shear reinforcement firstly, one has to check if the design shear force v d is smaller than the maximum punching. On the other hand, theoretical models proposed in previous studies are difficult to be applied to practical situations. The experimental punching shear strengths were compared with the available theoretical predictions, including the aci 318 code, bs 8110 code, aci 440 design guidelines, and a number of models proposed by some researchers in the literature. Form of shear reinforcement to be area of shear reinforcement provided to be provided nmm2 less than 0. Prediction of punching shear capacities of twoway concrete. Holding down bolts design spreadsheet to bs 59501, 81101 spreadsheet for designing holding down bolts to bs 5950, bs 8110 and concrete society advice note no 5.
The punching shear strength of the concrete is not sufficient. This paper compares design provisions for punching shear at internal columns in the superseded british standard bs8110, eurocode 2 ec2 and fib model code 2010 mc2010. As per bs 8110, for calculating punching shear capacity we have to consider % tensile reinforcement. Reinforced concrete design to bs8110 structural design 1. Punching shear % steel structural engineering general. However, the material safety factors for reinforced steel can be seen most of the time in different forms. Design for punching shear concrete structures eurocode. Punching shear in pad foundations on rock techylib. Before designing a beam, first, we need to find the bending moments and shear forces of the beam section through an analysis. How to calculate punching shear in flat slab quora. Shearfix punching shear reinforcement ancon australia. Bs 8110 part 01 is one of the most commonly used standards, and the method expressed in the code can be understood very easily compared guides given for the design of other elements.
Nov 21, 2015 specialists in punching shear reinforcement design manual to bs8110. Reinforcement detailing manual to bs 8110 free download. Comparison of punching shear requirements in bs 8110, ec2 and. However, when the load safety factors are included in calculating the design loads, the values of the resulting design loads become different for each code, and in this case, the aci was found to require less reinforcement than the bs. It was found that, only euro code 2 pren 199211 outlines briefly the issue of pad foundations on rock. Increases the punching shear capacity 6 of flat slabs without increasing the slab. This paper evaluates the punching shear strength of concrete flat slabs reinforced with different. The popular rcspreadsheets package version 4 was issued following the amendment to the uk national annex to eurocode 2 in december 2009. Prediction of punching shear capacities of twoway concrete slabs. Part 1 1985, eurocode 2 pren 199211 and aci 31802 on pad foundations, with particular emphasis on punching shear was first carried out. Therefore the software is based on a research paper. 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. These excel spreadsheets are intended as aids for design to both eurocode 2 and bs 81101.
Enhancement of punching shear strength of flat slabs using shear. Among the strong features of spreadsheets are their instinctive cellbased structure and easy to use capabilities. Critical section for punching shear is at a distance of 1. As per slab dimensions, only bottom slab having depth d2 is effective for resisting punching shear. The procedure for determining the punching shear requirements is shown in figure 4. Since the slab is thin and there are no beams around the column, the column slab joint is prone to punching. 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. Nov 04, 2019 for concrete subjected to flexure or axial loads, a factor of 1. These excel spreadsheets are intended as aids for design to both eurocode 2 and bs 8110 1. The ancon design program simplifies the specification and ordering of a shearfix system. Punching shear resistance of various slabcolumn connections is calculated and compared with the corresponding predictions of different design specifications such as. Although british standard bs 8110 has now been withdrawn, shear reinforcement can be safely designed and detailed to ec2 where a structure, including.
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