Fib 57: Shear and punching shear in RC and FRC elements

Fib Bulletin fifty seven is a set of contributions from a workshop on "Recent advancements on shear and punching shear in RC and FRC elements", held in Salò, Italy, in October 2010. Shear is one among a couple of parts of study into basics of the behaviour of concrete buildings the place rivalry is still among researchers. there's a carrying on with debate among researchers from a constructions viewpoint and people from a fabrics or fracture mechanics standpoint concerning the mechanisms that allow the strength circulation via a concrete member and throughout cracks.

In 2009, a operating staff used to be shaped inside of fib job workforce 4.2 "Ultimate restrict country versions" to harmonise assorted rules approximately layout strategies for shear and punching. an enormous consequence of this paintings used to be the consequent discussions among specialists and practitioners concerning the shear and punching provisions of the draft fib version Code, which resulted in the association of the Salò workshop. Invited specialists within the box of shear and FRC gave 18 lectures on the workshop that was once attended via seventy two individuals from 12 international locations in three assorted continents.

The contributions from this convention as compiled during this bulletin are believed to symbolize the easiest of the present nation of data. They definitely are of basic curiosity to fib participants and particularly beneficial within the finalization of the 2010 fib version Code. it really is was hoping that this book will stimulate extra study within the box, to refine and harmonize the to be had analytical types and instruments for shear and punching layout.

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Additional resources for Fib 57: Shear and punching shear in RC and FRC elements (workshop proceedings)

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1986 “The Modified Compression Field Theory for Reinforced Concrete Elements Subjected to Shear,” ACI Journal, 83(2), 219-231. , 1981, “Fundamental Analysis of Aggregate Interlock,” Journal of the Structural Division, ASCE, 107(ST11), pp 2245-2270. 30 2 MC2010: Shear strength of beams and implications of the new approaches . 3 MC2010: The Critical Shear Crack Theory as a mechanical model for punching shear design and its application to code provisions Aurelio Muttoni1 and Miguel Fernández Ruiz2 1 Prof.

The basic principles of the CSCT were introduced for the first time in the Draft code proposal of the Swiss code for structural concrete SIA 162 [Muttoni (1985)]. These theoretical findings [Muttoni and Schwartz (1991)] were the basis of the approach for slabs without transverse reinforcement in the Swiss code SIA 162 [SIA (1993)]. Further fib Bulletin 57: Shear and punching shear in RC and FRC elements 31 . improvements of the theory for shear in one- and two-way slabs [Muttoni (2003)] were also included into the new version of the Swiss code for structural concrete SIA 262 [SIA (2003)], which can be considered to be fully based on this theory with respect to shear design of members without stirrups.

It can be noted that these effects (concentrations of the shear field and of the crack widths) also develop for corner and edge columns. 15. The results are given for levels two and three of approximation of Model Code’s approach, and provide good and consistent agreement, significantly better than other design approaches such as EC-2, ACI 318 [Vocke (2002)]. Level III of approximation Corner columns Edge columns Inner columns with moment transfer Level II of approximation Fig. 15: Comparison of the CSCT with tests of flat slabs with varying moment transfer for inner, corner and edge columns.

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