Design manual to bs8110 bs8110 general detailing rules. Therefore the software is based on a research paper. 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. Nov 21, 2015 specialists in punching shear reinforcement design manual to bs8110. Since the slab is thin and there are no beams around the column, the column slab joint is prone to punching. Design for punching shear concrete structures eurocode.
The punching shear strength of flat slabcolumn connections calculated using the aci code was found to be. Punching shear capacity of double layer frp grid reinforced slabs. These excel spreadsheets are intended as aids for design to both eurocode 2 and bs 8110 1. Aug 30, 2010 rcc2000 spreadsheets for concrete design to bs 8110 and ec2 user guides for each spreadsheet in ms word format and acrobat. It is the only proven punching shear solution with both cares technical approval and bba certification. For example, when we design for bending, in bs 8110 part 01 1997, we can see a factor of 0. 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. Punching strength with shear reinforcement firstly, one has to check if the design shear force v d is smaller than the maximum punching. We strongly recommend the shear stud design is verified against an alternate standard, such as bs 8110 or bs en 1992, eurocode 2.
This approximate method for rectangular beams is based on permissible ratios of spaneffective depth. 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 shear capacity of the slab is checked against the design shear forces at the critical. The punching shear strength of the concrete is not sufficient. 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. The program allows analysis to bs en 1992 eurocode 2. Apr 28, 2020 alternatively, a spreadsheet could be used e. Apr 14, 2018 a spreadsheet is a computer application that simulates a paper worksheet where becoming increasingly popular in solving engineering related problems. Punching shear analysis of reinforced concrete flat plates. The punching shear is a failure mechanism in structural members like slabs and foundation by shear under the action of concentrated loads. 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. Prediction of punching shear capacities of twoway concrete slabs. As per slab dimensions, only bottom slab having depth d2 is effective for resisting punching shear. Codeparameter, aci, eccs, csa, euro code 2, bs8110, ceb fib.
Punching shear twoway shear beam shear oneway shear minimum reinforcement in the following, the values in square brackets are defaults of the program. Critical section for punching shear is at a distance of 1. However, most previous studies on the punching shear strength of steelfiberreinforced concrete flat slabs had presented empirical formulas based on experimental results. Enhancement of punching shear strength of flat slabs using shear. However, the material safety factors for reinforced steel can be seen most of the time in different forms. 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. This paper evaluates the punching shear strength of concrete flat slabs reinforced with different. The action of concentrated loads is on a smaller area in the structural members.
Pdf punching shear analysis of reinforced concrete flat plates. Bs 8110 details how deflections and the accompanying crack widths may be calculated. As per bs 8110, for calculating punching shear capacity we have to consider % tensile reinforcement. 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. Increases the punching shear capacity 6 of flat slabs without increasing the slab.
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. Civil engineering spreadsheet collection 2018 update. 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. Reinforcement detailing manual to bs 8110 free download.
Bs 8110 is a british standard for the design and construction of reinforced and prestressed concrete structures. Comparison of punching shear requirements in bs 8110, ec2 and. 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. Design results of rc members subjected to bending, shear, and. 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. 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. On the other hand, theoretical models proposed in previous studies are difficult to be applied to practical situations. Although used for most civil engineering and building structures, bridges and waterretaining structures are covered by separate standards bs 5400 and bs 8007. 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. Aci 31805, cepfip mc 90, and bs 811097 methods from the punching shear. Punching shear in pad foundations on rock techylib. Reinforced concrete design to bs8110 structural design 1.
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 is a code of practice for the structural use of concrete. Consideration on punching shear strength of steelfiber. Among the strong features of spreadsheets are their instinctive cellbased structure and easy to use capabilities. Form of shear reinforcement to be area of shear reinforcement provided to be provided nmm2 less than 0. This paper compares design provisions for punching shear at internal columns in the superseded british standard bs8110, eurocode 2 ec2 and fib model code. Punching shear resistance of various slabcolumn connections is calculated and compared with the corresponding predictions of different design specifications such as.
Code of practice for design and construction ics 91. The latter is based on the critical shear crack theory csct of muttoni which. Nov 04, 2019 for concrete subjected to flexure or axial loads, a factor of 1. Punching shear % steel structural engineering general. This limit was extensively exceeded by the shearreinforced specimen df3. 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. 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. For the purposes of this part of bs 8110, the definitions given in bs 81101 apply, together with the following. Max frank limited offers the following services and support for shearail in house design service, using a customised design program which. 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. 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. Rcc2000 spreadsheets for concrete design to bs 8110 and ec2. It is assumed that the crack forms at about 45 degrees though it may vary between 2540 degrees and the failure is in the form of a tru.
For concrete subjected to flexure or axial loads, a factor of 1. Punching shear resistance of various slabcolumn connections is calculated and compared. Investigations on the punching behaviour of reinforced. Part 1 1985, eurocode 2 pren 199211 and aci 31802 on pad foundations, with particular emphasis on punching shear was first carried out.
But for rectangular beams some simplified procedures may be used to satisfy the requirements without too much effort. Prediction of punching shear capacities of twoway concrete. Specialists in punching shear reinforcement design manual to bs8110. It was found that, only euro code 2 pren 199211 outlines briefly the issue of pad foundations on rock. Excel, for example, is a powerful spreadsheet with vba robust programming. But they advise that the design be verified against bs 8110 or bs en 1992, eurocode 2. Shearfix punching shear reinforcement ancon australia. 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. The popular rcspreadsheets package version 4 was issued following the amendment to the uk national annex to eurocode 2 in december 2009. For the purposes of this part of bs 8110, the definitions given in bs 8110 1 apply, together with the following. These excel spreadsheets are intended as aids for design to both eurocode 2 and bs 81101.
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. 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. 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. The procedure for determining the punching shear requirements is shown in figure 4. This paper compares design provisions for punching shear at internal columns in the superseded british standard bs 8110, eurocode 2 ec2. Although british standard bs 8110 has now been withdrawn, shear reinforcement can be safely designed and detailed to ec2 where a structure, including. The ancon design program simplifies the specification and ordering of a shearfix system. 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. Punching shear reinforcement asnzs aunz code issues. This part of bs 8110 gives recommendations for the structural use of concrete in buildings and. 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. 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.384 1420 629 165 794 1038 415 322 226 999 1527 1343 335 704 1292 1185 1393 1019 483 1219 1531 405 517 1012 1538 1447 146 1474 64 1319 531 1341 1472 961 1400 733 1185 1245 300