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Internal forces on rectangular or circular cross sections. The stress-strain curve of the concrete corresponds to the parabola rectangle stress diagram.įor standard concrete c2 = 2 o/oo and exponent = 2, closed formulas ( /2/ ) can be used to calculate the
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Internal action curve for reinforcing steel Figure 3.8 In addition, the application indicates when the permissible maximum reinforcement is exceeded.īases of design Internal action curve of concrete Figure 3.3Ĭompressive limit strain of concrete cu cu = 3.5, > C50 irrespective of type of concrete, table 3.1,Ĭompressive strain at end of parabolic area c2 c2 = 2.0, > C50 irrespective of type of concrete, table 3.1,Įxponent n n =2 > C50 depending on type of concrete, table 3.1, Where cross sections under low loading are concerned, compliance with the minimum reinforcement (compression/bending) can become decisive.
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You can select among the kh-(kd)-method (only with uniaxial loading) or the method with a given reinforcement ratio for the bending design. They are resolved by iteration with the help of the Newton method. The result is two or, with double bending, three non-linear equations, whereby the internal forces are functions of the border strains and the inclination angle of the neutral axis (double bending). The internal and external forces must be in balance. In the design of reinforced concrete, the strain state causing failure is calculated for the given internal forces while the reinforcement is unknown.ĭue to the strain distributions in the ULS defined in the standards, at least one border strain is always known. NA-PL Poland PN EN :2008/NA:2010 and PN-EN :2008/NA:2010ĭesign for bending and longitudinal force NA-I Italy UNI EN /NTC:2008 and EN :2004 /AC:2008 NTC: The application of Eurocode in Italy is described in the "Norme tecniche per le costruzioni" (/ 56 /) and the supplementary circular "Circolare finissima " (/ 57 /). NA-A: Austria NORM B :2011 and NORM B :2011 These NAs replace those of 2007 applicable recently. NDP Parameter defined in the National Annex (NA).Ĭurrent versions of the National Annexes (NA):
#FRILO STATIK SOFTWARE#
Software for structural calculation and designĮN: Recommended values EN EN :2004 /A1:2014 and EN :2004 /AC:2008 34Īnalyses on Reinforced Concrete Cross Sections
#FRILO STATIK VERIFICATION#
25 Strain verification in accordance with EN. 25 Crack width verification in accordance with EN. 10Ĭalculation of the effective stiffness. 10 Minimum reinforcement for compression members. 9 Minimum reinforcement for components exposed to bending. 8 Dimension-dependent design (kd method). 5 Design for a given reinforcement ratio. 4ĭesign for bending and longitudinal force.
#FRILO STATIK ARCHIVE#
Documents referring to former standards are available in our document archive at Service > Documentation >Manuals >Archive.Ĭontents Standards and acronyms. Note: This document describes the Eurocode-specific application. This document includes additional information about our reinforced concrete software applications. Analyses on reinforced concrete cross sections