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Plan irregularity
Reinforced concrete structures
Limitation of average normalised axial force in columns
Local ductility of columns (DCH)
Check of displacements
Reinforced concrete structures
P100-1/2013 P100-1/2006
dr,a SLS=0,005h Check at SLS dr,aSLS=0,005h
dr,a SLS=0,075h dr,a SLS=0,080h
dr,a SLS=0,010h
Non-structural components missing, or not interacting with the structure.
Design of structural members :
•frame members;
•joints
•walls
More precise provisions for ductility and capacity checking
P100-1/2013
0,01<>0,04
Critical zone at the base:
w,min = 0,005 wd,min = 0,12
All other critical zones:
w,min = 0,0035 wd,min = 0,08
P100-1/2006
0,01<>0,04
Critical zone at the base:
w,min = 0,005
All other critical zones:
w,min = 0,0035
Amplification factor for displacements / Check is not necessary for r.c. wall structuresor wall-predominant
dual structures.
P100-1/2013 P100-1/2006
Normative documents:
SR EN 1992-1:2004 STAS 10107/0-90
and ENV 1992-1
(provisions for design and detailing of seismicresistant components)
P100-1/2013 P100-1/2006
Ductility classes
DCH, DCM, DCL DCH, DCM
DCH – large q factors, capacity design rules, stringent conditions for local ductility
DCM – average q factors, capacity design rules with Rd=1,0, conditions for local ductility
DCL – small q factors, design according to EN 1992-1, no capacity design and ductility conditions
r.c., composite
steel
Q
Type of structure
DCH
DCМ
DCl
Frames, slender coupled walls or
dual system
5 a
u
/a
1
3.5 a
u
/a
1
2.0*
Walls (uncoupled)
4k
w
a
u
/a
1
3k
w
a
u
/a
1
Torsionally flexible structure
3,0
2,0
1.5
Inverted pendulum structure
2,5
2,0
1,5
One-storey structure with
cantilever columns, connected at
the top with floors providing dia-
phragm behaviour, with d<?>0,25
3,5
3,0
2,0
* if d <?> 0,75 in all columns. Otherwise q=1,5.
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