Eurocode Essay

7/14/2010 EC3 Made Simple 6 Mei 2009 Content 1. MIND MAP 2. INTRODUCTION 3. EUROCODE 3 4. CROSS SECTION CLASSIFICATION 5. DESIGN OF ELEMENTS 6. WORK EXAMPELS 1 7/14/2010 MIND MAP INTRODUCTION CONNECTIONS EC3 MADE SIMPLE EUROCODE 3 DESIGN CHECKING USING EC3 CROSS SECTION CLASSIFICATION 2 7/14/2010 MIND MAP Eurocode 3 CROSS-SECTION RESISTANCE DESIGN CHECKING BUCKLING RESISTANCE MIND MAP Eurocode 3 TENSION cl. 6. 2. 3 COMPRESSION cl. 6. 2. 4 BENDING cl. 6. 2. 5 SHEAR cl. 6. 2. 6 TORSION cl. 6. 2. 7 BENDING &SHEAR cl. 6. 2. 8 DESIGN CHECKING CROSS-SECTION RESISTANCE BENDING, BENDING SHEAR & AXIAL LOAD cl. 6. 2. 6 BENDING & AXIAL LOAD cl. . 2. 6 3 7/14/2010 MIND MAP Eurocode 3 DESIGN CHECKING BUCKLING RESISTANCE BENDING AND AXIAL COMPRESSION cl. 6. 3. 3 BENDING cl. 6. 3. 2 COMPRESSION cl. 6. 3. 4 4 7/14/2010 Element Design Eurocode 3 CROSS-SECTION RESISTANCE ELEMENT DESIGN BUCKLING RESISTANCE Element Design Eurocode 3 TENSION cl. 6. 2. 3 COMPRESSION cl. 6. 2. 4 BENDING cl. 6. 2. 5 SHEAR cl. 6. 2. 6 TORSION cl. 6. 2. 7 BENDING &SHEAR cl. 6. 2. 8 DESIGN CHECKING CROSS-SECTION RESISTANCE BENDING, BENDING SHEAR & AXIAL LOAD cl. 6. 2. 6 BENDING & AXIAL LOAD cl. 6. 2. 6 5 7/14/2010 Design Element 1 ) Tension (cl. 6. 2. 3) Design Element 2 ) Compression (cl. . 2. 4) 6 7/14/2010 Design Element 3 ) Bending moment (cl. 6. 2. 5) In i l i l I a simple single span, f il failure occurs when d i value of th h design l f the bending moment MEd exceeds design moment resistance of the cross section Mc. Rd. Magnitude depends on section shape, material strength and shape section classification. Where shear force on cross-section is small its effect on the resistance moment may be neglected. Wpl, full plastic section modulus Wel, l ti W l elastic section modulus ti d l Weff, effective section modulus EC3 sets this limit as a shear force of 50% of the plastic shear resistance

Design Element 7 7/14/2010 Design Element 4) Shear (cl. 6. 2. 6) As almost all the shear force is carried by the web and since the variation in shear stress through the web is quite small it is sufficiently accurate for design to assume an average shear stress over the web. b stress ? ? = Vhb 4I ? h ? tf ? max Vhb ? h? = ? 1+ ? 2I ? 4b ? tw Cross – section ? = Vhb 2I The pattern of shear stress in an I section assuming elastic behaviour Variation of shear stress ? 15 Design Element 16 8 7/14/2010 Design Element The shear area Av may be taken as cl. 6. 2. 6 (3) tw h 17 Design Element 5) Torsion (cl. 6. 2. 7) 8 9 7/14/2010 Design Element Combined shear force torsional 19 Design Element 6) Bending and Shear (cl. 6. 2. 8) 20 10 7/14/2010 Design Element Alternative for I section (equal flanges) and bending about major axis, the reduced design plastic resistance axis moment allowing for the shear force is as follow: 21 Design Element 7) Bending and axial force (cl. 6. 2. 9) 22 11 7/14/2010 Design Element Design plastic moment reduced due to axial force 23 Design Element For bi-axial bending, follow this criteria: 24 12 7/14/2010 Design Element 8) Bending, shear and axial force. (6. 2. 10) 25 Thank You 6 Mei 2009 13

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