$$$$ IDENTI NOTICE BR232186 12/07/31 21:15:00 7455 DATE 12/07/31 Procedure IDENTI Voir aussi : ---------------- Y1 Y2 ... Yn = IDENTI NOMMOD X1 X2 ... Xm ; Description : __________ The IDENTI procedure makes it possible to identify material parameters in relation to some behavior models. Contents : _________ NOMMOD : name of the model (MOT type) | MAZARS | ... | X1 .. Xm : values for identifying the parameters Y1 .. Yn : identified parameters a) Case of MAZARS's model : _________________________ m= 7 X1 : INITIAL YOUNG'S MODULUS X2 : POISSON'S RATIO X3 : YIELD STRESS IN TENSION X4 : RESIDUAL STRESS IN TENSION X5 : FRAGILITY INDEX ( 0 < X5 < 1 ) X6 : YIELD STRESS IN COMPRESSION X7 : STRAIN CORRESPONDING TO THE PREVIOUS STRESS n=5 Y1 : KTR0 PARAMETER Y2 : ATRA Y3 : BTRA Y4 : ACOM Y5 : BCOM b) Case of MAXWELL's model : ___________________________ If identification is done from creep curve of EUROCODE 2 ( default option) m = 8 X1 UNITE = unit of calculus (seconde, jour, annee) X2 TMAX = maximum duration of the calculus X3 NB = number of viscous branches ( elastic branch is labelled 0) X4 EUROCODE X5 RM = mean radius of the structure in meters X6 ROH = percentage of humidity (0. < roh < 100.) X7 S = coefficient relating to the cement X8 FCM = mean compressive resistance in Mpa If identification is done from creep curve of BPEL m = 7 X1 UNITE = unit of calculus (seconde, jour, annee) X2 TMAX = maximum duration of the calculus X3 NB = number of viscous branches ( elastic branch is labelled 0) X4 BPEL X5 RM = mean radius of the structure in meters X6 ROH = percentage of humidity (0. < roh < 100.) X7 FC28 = mean compressive resistance at 28 days in MPa n=3 Y1 : evolution containing Young's modulus in Pa versus time in days Y2 : table containing the modulus of each branch, in Pa versus time in days Y3 : table containing the relaxation time of each branch, in days If identification is done from creep curve of LCPC m = 7 X1 UNITE = unit of calculus (seconde, jour, annee) X2 TMAX = maximum duration of the calculus X3 NB = number of viscous branches ( elastic branch is labelled 0) X4 LCPC X5 RM = mean radius of the structure in meters X6 RHOS= ratio of reinforcement in a reinforced concrete section (0. < RHOS < 1.) X7 E1AN = Young's moduulus measured in laboratory at 1 year age [MPa] n=3 Y1 : evolution containing Young's modulus in Pa versus time in days Y2 : table containing the modulus of each branch, in Pa versus time in days Y3 : table containing the relaxation time of each branch, in days c) Case of GLRC_DM's model ___________________________ m = 12 X1 : concrete Young's modulus X2 : concrete Poisson ratio X3 : steel Young's modulus X4 : steel Poisson ratio X5 : shell thickness X6 : steel cross section area per linear meter X7 : relative position of a steel layer in the thickness X8 : concrete tensile strength X9 : limit membrane load in compression per linear meter X10 : parameter GAMMA_T such as 0 < GAMMA_T < 1 X11 : parameter GAMMA_F such as 0 < GAMMA_F < 1 X12 : do we expect high degradation due to shear? 1 if yes, 0 else n = 7 Y1 : equivalent Young's modulus in membrane Y2 : equivalent Poisson ratio in membrane Y3 : equivalent Young's modulus in bending Y4 : equivalent Poisson ratio in bending Y5 : initial threshold in the damage surface Y6 : parameter GAMMA_C Y7 : coupling parameter in membrane/bending ALPHA * References: [1] B. Richard, N. Ile. (2013). Influence of concrete cracking on transfere movements - phase 2: implementation in Cast3M of a simplified reinf concrete model and structural validations (in French). CEA Tech RT12-011/A.
© Cast3M 2003 - All rights reserved.
Disclaimer