seismic analysis as a tool for checking the structural system

z
y
x
Stresses σ x [MPa] Stresses σ y [MPa] Stresses τ xy [MPa]
Fig.11 Stresses on shear walls
Cross-section rotation capacity
The prescribed minimum rotation capacity (CCDF) for column - ductile class „L“ is μ 5.
No. of Steel
bars
Steel bar area
Young'
modulus Steel Concrete
Design bending
moment
ohybova pruzna
unosnost po
odpadnuti krycej
vrstvy
5 C35/45
H B d1 (cover) Φs As Es fyk fck Msd Mu q
[mm] [mm] [mm] [mm] [mm2] [MPa] [MPa] [MPa] [kNm] [kNm]
500 500 25 25 2454,4 200000 220 35 454,0 227,0 2
1 / r
=
d [mm] 462,5 vyska od horneho okraja po os vystuze
xlim [mm] 351,90 Hranica pruzneho pretvorenia Medzny moment zo seizmického výpo
ξsy 0,7609 pre hodnotu q= 2
εsy,k 0,0011
Ns [N] 539961
xcu' [mm] 34,283 vyska tlaceneho betonu po odpadnuti krytia d0[mm]= 420 rameno vnutornych sil po odpadnuti kryt
xcu [mm] 59,283 suradnica neutralnej osi po odpadnuti krytia
ξcu 0,1282
ε
εcu 0,0035 cu( 1−ξsy)
= 5,94 concrete failure
Tecenie vystuze
Nsd [N] 1079922
xsu'd [mm] 68,567 vyska tlaceneho beton μ1/r= min = 5,01
xsu [mm] 93,567 suradnica neutralnej o
ξsu 0,2023
ε su ,k (1 − ξ sy )
εsu,k 0,0201
ε sy ,k (1 − ξ cu )
= 5,01 steet failure
ε
sy,
k
ξ
cu
ξ cu =(x cu +d 1 )/d
ξ sy =x lim /d
σ b
ε cu =-0,0035
concrete
Tear off cover
ε c
d
d 1
H
B
steel
x
ε su,k
x lim
d 1
x cu ‘
ε sy,k =f yk /E s
σ s
x cu
ε s
Fig. 12 Cross section 500x500mm rotation capacity analysis
ANSYS konference 2008
16. ANSYS FEM Users‘ Meeting & 14. ANSYS CFD Users’ Meeting
Luhačovice 5. - 7. listopadu 2008
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