Analysis and modelling of the seismic behaviour of high ... - Ingegneria

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5. SEISMIC BEHAVIOUR OF RC COLUMNS EMBEDDING STEEL PROFILES The shear resistance of this mechanism was evaluated following the prescriptions of prEN 1992-1, Final draft. In the latest version of Eurocode 2, for members not subjected to axial forces and with transverse reinforcement, Vjoint,ccf, is evaluated as the smaller quantity between the concrete compressive strength Vc and the tensile strength of the transverse reinforcement Vs, where: and f 1 V = V = ν ⋅ ⋅b ⋅0.9 ⋅d ⋅ γ θ θ ck c Rd ,max cs c sw yk, w s Rd , sy 0.9 cot s γ s ( cot + tan ) ( 5.33 ) A f V = V = ⋅ ⋅ ⋅d ⋅ θ ( 5.34 ) where ν = 0.6 (1 - fck / 250); is the angle between the concrete struts and the column longitudinal axis and it should be chosen such that the condition 1< cotθ
5. SEISMIC BEHAVIOUR OF RC COLUMNS EMBEDDING STEEL PROFILES with: 204 bc αω wd ≥ 30µ φν dε sy , d − 0, 035 ( 5.36 ) b 0 α global confinement effectiveness factor, equal to α= αn × αs with, for rectangular cross sections: ωwd 2 bi α n = 1 − ( 5.37 ) 6b h 1 − s 2b0 α s = 1 − s 2h 0 0 0 ( 5.38 ) mechanical volumetric ratio of confining hoops within the critical regions equal to: µφ Volume of the confining hoops f Volume of concrete core f yd , w ⋅ ( 5.39 ) required value of the curvature ductility factor equal to: 2q −1 if T ≥ T T 1+ 2( q − 1) c if T1 < T T 1 νd normalized design axial force, equal to Ed εsy,d bc b0 h0 1 c cd N A f design value of tension steel strain at yield gross cross-sectional width c cd width of confined core (to the centerline of the hoops) depth of confined core (to the centerline of the hoops) for the critical regions of columns lcr, except as specified follows: ( 5.40 ) 1. If beams frame into all four sides of the joint and their width is at least three-quarter of the parallel cross-sectional dimension of the column, the spacing of the horizontal confinement reinforcement in the joint may be increased to twice that required, but not to exceed 150 mm.
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Dipartimento di Ingegneria Meccanic
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UNIVERSITÀ DEGLI STUDI DI TRENTO D
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Ai miei genitori
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INDEX 1 INTRODUCTION...............
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INDEX iii 4.10.3 Results of the PsD
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1.1 Introduction 1 1 INTRODUCTION I
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1. INTRODUCTION imposes precise con
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1. INTRODUCTION joints whilst 2D mo
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7 2 DUCTILITY AND SEISMIC RESPONSE
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2. DUCTILITY AND SEISMIC RESPONSE O
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3. SEISMIC BEHAVIOUR OF BOLTED END
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Analysis and modelling of the seismic behaviour of high ... - Ingegneria

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