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Transcript of m2464_ec5
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5 (1995-1-1)
-
-
. 407
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199512:2004()
1995 - 1 -1 : 2004
51995-2
12:
1 1 :
-
5
2:
:
:
:
O 5 (EN 1995) :
EN 1995-1-1
EN 1995-1-2
EN 1995-2
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199512:2004()
1995 - 1 -1 : 2004
5-
5
12:
1 1 :
-
5
2:
:
:
:
. 5
.
E12010
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Amendment ()
+
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5 11
.1 ,
.
.2
1990:2002 1991
.
( ,
,
()
,
).
.3 kmod,kdef,
(..2) kh
( )
,
,) .
.4
( )
s
.
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.5
5 11
, , .
.6
(,
).
.
E ,,,.
.
: ( ) ,
,
sys.
.7
.
.2.
ser
.
.8
. ,
,, (),,, ,
,
.
.9 :
( ).
(,SB,..).
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:
5 11
.
,
, ,
(, ,
..).
():
.
(): .
():
.
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.
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A
. 1
1995 :
1. 1990:2002
2. 1991
3. 1998 ,
. 8
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regions of high seismic risk.
Smaller scale timber structures
(traditional buildings or new oneswith timber roofs and floors )
Larger scale timber structures
(buildings with long span timberframes - multi storey timber
Seism is not critical for the timber Seism is not critical for the timber
s ruc ures e. .c
,
anchorage of the roofs on the vertical load
bearing systems (masonry or brick walls, RC
frames e.t.a.) the overall stability, and the
establishment of diaphragmatic action.
,
anchorage of the buildings, the overall
stability, some times the joints, the
establishment of diaphragmatic action and
mainly for the horizontal deformations.
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Smaller scale timber structures
(traditional buildings or new oneswith timber roofs and floors )
Larger scale timber structures
(buildings with long span timberframes - multi storey timber
Seism is not critical for the timber
components, but is critical for the
Seism is not critical for the timber
components, but is critical for the
s ruc ures e. .c
bearing systems (masonry or brick walls, RC
frames e.t.a.) the overall stability, and the
establishment of diaphragmatic action.
,
stability, some times the joints, the
establishment of diaphragmatic action and
mainly for the horizontal deformations.
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.9
:
( ),
,
(,SB,..)
.10
:
,
, ,
(,, ..).
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A .
. 1
1995 :
1. 1990:2002
2. 1991
3. 1998 ,
. . 8
4. 1993 3:
(.. )
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1
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A .
. 1
1995 :
1. 1990:2002
2. 1991
3. 1998 ,
. . 8
4. 1993 3:
(.. )
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(Caironi, Bonera, 1989)
.
1
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A
. 1
1995 :
1. 1990:2002
2. 1991
3. 1998 ,
. . 8
4. 1993 3:
(.. )
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1
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A
. 1
1995 :
1. 1990:2002
2. 1991
3. 1998 ,
. . 8
4. 1993 3:
5. ,
.
.
.
5
.
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1
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()
. 1
1
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. 1
A
1995 :
1. 1990:2002
2. 1991
3. 1998 ,.. .
4. 1993 3:
. .
6. s.
.
1
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:
. 1
(, , ) s.
5.
70 s
1
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338, ()
. 1
(TRADA, 2007)
1
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. 1
s
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5 5
,
s ,
,
.
.
To .
. 1
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. 1
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5 5
T
.
(Excel) .
,
.
. 1
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. 1
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5 5
O EC5
,
,
.
EC5 :
,
, ,
. . .
C5,
.
(.. )
. 1
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,
.. (Glued laminated timber =
)
. 1
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..
92
(, , , , )
E () CEN
, 844112, 5.
. 1
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844 1-12 (3 )
. 1
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-
844 1-12 ()
Round and sawn timber Terminology Part 3:
General terms relating to sawn timber 3:
3.3. Planed timber
E.M..,
(machining)
.3.4. Boule ()..
,
OK
, .
3.5. Square edged
timber
,
()
().
3.6. Wane
, ,
(face) (edge).Face = ()
Edge= () (. 5)
()
edge (.5)
3.7. Unedged
timber
??? . 3.5
().
3.8. Narrowestwidth
()
.
:
. 1
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844 1-12 ()
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.
2
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. 2
.
(
).
Sd Rd
:
Sd =
Rd = ()
2
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. 2
Sd Rd
Y(Sd) (. 1990:2002 1991 )
. , , , , , , ,
. M Gk,j + Ad + 2,i Qk,i
(),(. , 1990:2002)
G =, Q q = , S= , W =
G= 1.35 Q=1.5
0(q)= 0.7 (, , , , )
0 (q)= 1.0 ()
0(s)= 0.5 (1000.)
0(w)= 0.6
2(q)= 0.3 (, ), 2(q)= 0.6(, )
= , .
2(s)= 0.0(1000.)
2(w)= 0.0
2
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. 2
Sd Rd
Y(Sd) (. 1990:2002 1991 )
. G, Gk, + Q,1 Qk,1 + Q,i 0,i Qk,i
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. 2
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. 2
Sd Rd
k
:
. 2
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2.3 1995-1-1.
.
(,, solid
timber):1,3
(Gluedlaminatedtimber): 1,25
k
(LVL) : 1,2
(plywood):
(riented
1,3
(Particleboards): 1,3
(Fibreboards hard): 1,3
,
(Fibreboards MDF): 1,3
(Fibreboards soft) : 1,3
: 1,3
: 1,25
1,0
. 2
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5
LVL. 1 3.
(,, solid
timber):1,3
(Gluedlaminatedtimber): 1,25
OLVL
(),
.
(LVL) : 1,2
(plywood):
(riented
1,3
(Particleboards): 1,3
(Fibreboards hard): 1,3
,
(Fibreboards MDF): 1,3
, ,
(Fibreboards soft) : 1,3
: 1,3
, , . , , . : 1,25
1,0
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.3
.
. 2 , . 3
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Sd Rd
k
. 2 , . 3
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Sd Rd
d k
Sd kmodk
:
Rk
kmod
.
. 2 , . 3
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mo
:
1. Sd kmod
k
.
(.. ).
, ().
. 2 , . 3
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(. 1995-1-1, 2.1, 2.2)
K
10
()
1 6
,
(..)
:
,
.
. 2 , . 3
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(. 1995-1-1, 2.1, 2.2)
10
6 10
()
1 6
1
,
(..)
.
Cost E55
. 2 , . 3
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kmod(. 1995-1-1, 2.4.1,3.1, Amendment,EN 1995-1-1:2004/A - June 2008))
(,)
-
-
-
-
1408-1-1
14080
1
2
0,60
0,60
0,70
0,70
0,80
0,80
0,90
0,90
1,10
1,10
(LVL)
(-,
l wood
EN 14374, EN 14279
636
636-1
636-2
, , , , ,
636-3
(riented StrandBoards - OSB)
EN 300
OSB/2
OSB/3, OSB/4
OSB/3, OSB/4
1
1
2
0,30
0,40
0,30
0,45
0,50
0,40
0,65
0,70
0,55
0,85
0,90
0,70
1,10
1,10
0,90
(particleboards)
312
P4, P5
P5
P6, P7
P7
1
2
1
2
0,30
0,20
0,40
0,30
0,45
0,30
0,50
0,40
0,65
0,45
0,70
0,55
0,85
0,60
0,90
0,70
1,10
0,80
1,10
0,90
(Fibreboards, hard
hardboard)
-HB.LA, HB.HLA1 2
HB.HLA1 2
1
2
0,30
0,20
0,45
0,30
0,65
0,45
0,85
0,60
1,10
0,80
(Fibreboards, medium
622-3
MBH.LA1 2
.LS1 2
1
1
0,20
0,20
-
0,40
0,40
-
0,60
0,60
-
0,80
0,80
1,10
1,10
. - - - , ,
(Fibreboards, MDF)
EN 622-5
MDF.LA, MDF.HLS
MDF.HLS
1
2
0,20
-
0,40
-
0,60
-
0,80
0,45
1,10
0,80
. 2
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Omo
:
Sd kmodk
o(...)
(kmod)
(kdef)
, ,
... > 20%
. 2 , . 3
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Sd kmodk
(...%)
= x 100
B
. 2 , . 3
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EC5 "
.
kmod .
. 2 , . 3
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kmod(. 1995-1-1, 2.4.1,3.1, Ammendment,EN 1995-1-1:2004/A - June 2008))
-
-
-
-
1408-1-1
1408012
0,600,60
0,700,70
0,800,80
0,900,90
1,101,10
(, )
(LVL)
(-,
plywood)
EN 14374, EN 14279
636636-1
636-2
, , , , ,
636-3
(riented StrandBoards - OSB)
EN 300OSB/2
OSB/3, OSB/4
OSB/3, OSB/4
1
1
2
0,30
0,40
0,30
0,45
0,50
0,40
0,65
0,70
0,55
0,85
0,90
0,70
1,10
1,10
0,90
(particleboards)
312
P4, P5P5
P6, P7P7
12
12
0,300,20
0,400,30
0,450,30
0,500,40
0,650,45
0,700,55
0,850,60
0,900,70
1,100,80
1,100,90
-(Fibreboards hard
hardboard)
-HB.LA, HB.HLA1 2
HB.HLA1 2
1
2
0,30
0,20
0,45
0,30
0,65
0,45
0,85
0,60
1,10
0,80
(Fibreboards mediummediumboard)
622-3
MBH.LA1 2
.LS1 2.LS1 2
1
12
0,20
0,20-
0,40
0,40-
0,60
0,60-
0,80
0,800,45
1,10
1,100,80
(Fibreboards MDF)
EN 622-5MDF.LA, MDF.HLS
MDF.HLS
1
2
0,20
-
0,40
-
0,60
-
0,80
0,45
1,10
0,80
. 2 , . 3
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EC5
.
kmod .
(. 1995-1-1, 2.3.1.3)
1 20C, >65%
.
2 20C, >85%
....
3
...
2
. 2 , . 3
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.
,
.
.
.
. 2 , . 3
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. (...
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(. 1995-1-1, 2.3.1.3 )
. . .
1 20C, >65%
.
...
, ,
.
93%.
2 20C, >85%
.
... =
(123)%
... =
,
.
,
(.. ), ,
.
3
...
...
>19%.
(..
:
. , 1 2, ,
... > 19% 3.
2. ).
. 2 , . 3
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(3)
. 2 , . 3
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(3)
. 2 , . 3
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2 ,
3
2
2
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. 2 , . 3
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(
(1)
. 2 , . 3
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kmod(. 1995-1-1, 2.4.1,3.1, Ammendment,EN 1995-1-1:2004/A - June 2008))
-
-
-
-
1408-1-1
1408012
0,600,60
0,700,70
0,800,80
0,900,90
1,101,10
kmod,
, LVL
-
(LVL)
(-,
plywood)
EN 14374, EN 14279
636636-1
636-2
, , , , ,
.
636-3
(riented StrandBoards - OSB)
EN 300OSB/2
OSB/3, OSB/4
OSB/3, OSB/4
1
1
2
0,30
0,40
0,30
0,45
0,50
0,40
0,65
0,70
0,55
0,85
0,90
0,70
1,10
1,10
0,90
(particleboards)
312
P4, P5P5
P6, P7P7
12
12
0,300,20
0,400,30
0,450,30
0,500,40
0,650,45
0,700,55
0,850,60
0,900,70
1,100,80
1,100,90
-(Fibreboards hard
hardboard)
-HB.LA, HB.HLA1 2
HB.HLA1 2
1
2
0,30
0,20
0,45
0,30
0,65
0,45
0,85
0,60
1,10
0,80
(Fibreboards mediummediumboard)
622-3
MBH.LA1 2
.LS1 2.LS1 2
1
12
0,20
0,20-
0,40
0,40-
0,60
0,60-
0,80
0,800,45
1,10
1,100,80
(Fibreboards MDF)
EN 622-5MDF.LA, MDF.HLS
MDF.HLS
1
2
0,20
-
0,40
-
0,60
-
0,80
0,45
1,10
0,80
k
. 2 , . 3
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kmod(. 1995-1-1, 2.4.1,3.1, Ammendment,EN 1995-1-1:2004/A - June 2008))
-
-
-
-
1408-1-1
1408012
0,600,60
0,700,70
0,800,80
0,900,90
1,101,10
()
40% -
(LVL)
(-,
plywood)
EN 14374, EN 14279
636636-1
636-2
, , , , ,
50%)
().
636-3
(riented StrandBoards - OSB)
EN 300OSB/2
OSB/3, OSB/4
OSB/3, OSB/4
1
1
2
0,30
0,40
0,30
0,45
0,50
0,40
0,65
0,70
0,55
0,85
0,90
0,70
1,10
1,10
0,90
(particleboards)
312
P4, P5P5
P6, P7P7
12
12
0,300,20
0,400,30
0,450,30
0,500,40
0,650,45
0,700,55
0,850,60
0,900,70
1,100,80
1,100,90
-(Fibreboards hard
hardboard)
-HB.LA, HB.HLA1 2
HB.HLA1 2
1
2
0,30
0,20
0,45
0,30
0,65
0,45
0,85
0,60
1,10
0,80
(Fibreboards mediummediumboard)
622-3
MBH.LA1 2
.LS1 2.LS1 2
1
12
0,20
0,20-
0,40
0,40-
0,60
0,60-
0,80
0,800,45
1,10
1,100,80
(Fibreboards MDF)
EN 622-5MDF.LA, MDF.HLS
MDF.HLS
1
2
0,20
-
0,40
-
0,60
-
0,80
0,45
1,10
0,80
k
. 2 , . 3
-
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kmod(. 1995-1-1, 2.4.1,3.1, Ammendment,EN 1995-1-1:2004/A - June 2008))
-
-
-
-
1408-1-1
1408012
0,600,60
0,700,70
0,800,80
0,900,90
1,101,10
()
(LVL)
(-,
plywood)
EN 14374, EN 14279
636636-1
636-2
, , , , ,
636-3
(riented StrandBoards - OSB)
EN 300OSB/2
OSB/3, OSB/4
OSB/3, OSB/4
1
1
2
0,30
0,40
0,30
0,45
0,50
0,40
0,65
0,70
0,55
0,85
0,90
0,70
1,10
1,10
0,90
(particleboards)
312
P4, P5P5
P6, P7P7
12
12
0,300,20
0,400,30
0,450,30
0,500,40
0,650,45
0,700,55
0,850,60
0,900,70
1,100,80
1,100,90
-
-
()
(
).
(Fibreboards hard
hardboard)
-HB.LA, HB.HLA1 2
HB.HLA1 2
1
2
0,30
0,20
0,45
0,30
0,65
0,45
0,85
0,60
1,10
0,80
(Fibreboards mediummediumboard)
622-3
MBH.LA1 2
.LS1 2.LS1 2
1
12
0,20
0,20-
0,40
0,40-
0,60
0,60-
0,80
0,800,45
1,10
1,100,80
,
.
(Fibreboards MDF)
EN 622-5MDF.LA, MDF.HLS
MDF.HLS
1
2
0,20
-
0,40
-
0,60
-
0,80
0,45
1,10
0,80
. 2 , . 3
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!!!
,
kmod
.
.. (1.35G+1.5S) ()
(), kmod.
,
kmod.
. 2 , . 3
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;;;
l = 8,1m
yd modk
M yd / kmod
1,0
. 2 , . 3
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,..
1.35G
kmod =0.60
1.35G+1.5Skmod =0.90.
Myd/kmod
1,3
. 2 , . 3
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Sd Rd
k
Sd kmodk
:
Rk
mo
.
. 2, 3, 6 : , ,
-
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Sd Rd
k
:
Sd kmod k
k
kmod
.
:
- kh = ,
- ks s =
. 3
kh =(. )
-
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Sd kmod k k
,
.
k
k
,
.
, .
kh
1995-1-1, 3.2
//
,
. :
k 700 kg/m3,h< 150 mm.
=
=150
min
2,0
hkhfm,kft,0,k
.
kh . :
3,1
10,
1995-1-1, 3.3
,
fm,kft,0,k
.
h (mm) =
.
=
11,
min hkh
h
(LVL)
1995-1-1, 3.4
, m,k .h= mm,
s= .
14374.
=
21
300
,
min
s
h hk
h
(LVL)
1995-1-1, 3.4
, ft,0,k
.
l=mm,s= .
14374.
=
1,1
3000
min
s
l lk
. 3
-
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Sd kmod k k
k
(ksys) (1995-1-1, 6.6).
10%
(ksys = 1,1).
X(4) (.. ,
, ),
.
. 3
-
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Sd kmod k k
k
(ksys) (1995-1-1, 6.6).
10%. (ksys = 1,1) :
4 ., . .
)
( ,
, -, ..).
1,2 m.
, ,
- ,, OSB..),
,
,
.
. 3
-
7/21/2019 m2464_ec5
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(, , ),
s
.
(,, solid 1,3
5
timber):
(Gluedlaminatedtimber): 1,25
(LVL) : 1,2
. : p ywoo ,
(riented
StrandBoards SB):
,
(particleboards): 1,3
(Fibreboards,hard): 1,3
(Fibreboards,medium): 1,3
, . s
(Fibreboards,MDF): 1,3
(Fibreboards,soft): 1,3
. 3
-
7/21/2019 m2464_ec5
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(solid timber)
:
(softwood). , ,
, , , (Douglas
r , p c p ne .
(hardwood). , ,
: , , , , ,
, , , .
: .
(Douglasfir) ,
.
,
.
.
. 3 .
-
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,
(wood based products)
(o)
-
7/21/2019 m2464_ec5
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. 3
-
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(STEP 1, 1995)
LaminatedveneerLumber
. 3
-
7/21/2019 m2464_ec5
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E
, (plywood)
(P, 1998)
.
. 3
-
7/21/2019 m2464_ec5
81/142
,
-
.
. 3
-
7/21/2019 m2464_ec5
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E
-
7/21/2019 m2464_ec5
83/142
,
-
7/21/2019 m2464_ec5
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5 5
,
,
, ,
.
.
.
. 3
-
7/21/2019 m2464_ec5
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.
(, , ,
) .
.
,
(, .)
,
.
.
:
. 3
-
7/21/2019 m2464_ec5
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:
(,
(,
,
, ,
.
,
.
. . . ,
.
.
(STEP 1, 1995)
(!)
. 3
-
7/21/2019 m2464_ec5
87/142
-
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D (deciduous=) C (coniferous=)
. 3
-
7/21/2019 m2464_ec5
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D (deciduous=), C (coniferous=)
.. .
(TRADA, 2007)
. 3
-
7/21/2019 m2464_ec5
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(homogenous)
.
com ne
, .
.
-
7/21/2019 m2464_ec5
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.
. 6
-
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(. 1995-1-1, 6.1, 6.2, 6.3)
(. 1995-1-1, 6.1, 6.2, 6.3)
-
-
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.
. 6
-
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.
.
(. 1995-1-1, 6.1, 6.2, 6.3)
-
. 6
(EN 1995 1 1 6 4)
-
7/21/2019 m2464_ec5
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(EN 1995-1-1, 6.4)
.
Manual, Canadian
wood construction
. 6
-
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(. 1995-1-1, 6.1, 6.2, 6.3)
. 6
-
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. 6
( 1995-1-1 6 1 2)
-
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(1995 1 1, 6.1.2)
() .
//
-
(338) C24 b 8,0 cm
mean k /m3 420 h 14 0 cm
fm,k N/mm2 24 A 112 cm2
ft,0,k N/mm2 14 Wy 261 cm3
ft,90,k N/mm2 0,5 Iy 1829 cm4
fc,0,k N/mm2 21 Wz 149 cm3
c90k N/mm2 2 5 Iz 597 cm4, ,
fv,k N/mm2 2,5 iz 2,3 cm
E0,mean N/mm2 11000 iy 4,0 cm
Gmean N/mm2 690
E0,05 N/mm2 7400
b 8 0 cmo
'
h' h
h' 12,0 cm
A' 96 cm2
,
. 6
( 1995-1-1 6 1 3)
-
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(1995 1 1, 6.1.3)
5 .
.
, ,
(
. 6
~0,5/mm2
13/ 2 22/ 2
-
7/21/2019 m2464_ec5
100/142
~13/mm2 ~22/mm2.
. 6
(. . )
-
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. 6
-
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, ,
. 6
(1995-1-1, 6.1.5)
-
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( , )
,
.
' .
, .
C5
. ,
kc,90.
1 < kc,90 < 1.75 (. Amendment)Piazza at all, 2009
. 6
(1995-1-1, 6.1.5)
-
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kc,90
5.
4 (!)
.
amendment (
.
1. (..
).
).
(A)
. 6
(1995-1-1, 6.1.5)
-
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( , )
. 6
(1995-1-1, 6.1.5)
-
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h
a l= 100 mm
2.
. 6
1. //
-
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, : rel,z 0,3 rel,y 0,3
1.
. 6
1. //
-
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d
L
b*L Nd
. 6
(1995-1-1, 6.2.2)
-
7/21/2019 m2464_ec5
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.
. 6
(1995-1-1, 6.2.2)
-
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, . , .
. 6
2. // ()
-
7/21/2019 m2464_ec5
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: rel,z>0,3 rel,y>0,3
zelton, Baird, 2004
. 6
// ()
-
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, ,: rel,z > 0,3 rel,y > 0,3,
.
(...).
. 6
(1995-1-1, 6.1.6)
-
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, (LVL):
: km =0,7: km =1,0
: km =1, 0
. 6
y z
-
7/21/2019 m2464_ec5
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km = 0
. 6
y z (
-
7/21/2019 m2464_ec5
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, rel,m > 0,75)
. 6
y z (
-
7/21/2019 m2464_ec5
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Caironi, Bonera, 1989
. 6
y z
-
7/21/2019 m2464_ec5
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kcrit .
:
(GItor)
z
lef:
-
-
lef
Caironi, Bonera, 1989
. 6
y z (
-
7/21/2019 m2464_ec5
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()
Caironi, Bonera, 1989
. 6
y z (
-
7/21/2019 m2464_ec5
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.
Kcrit = 1
= lef
Caironi, Bonera, 1989
. 6
y z (
-
7/21/2019 m2464_ec5
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Caironi, Bonera, 1989
. 6
y
-
7/21/2019 m2464_ec5
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. 6
y
-
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,
x kcrit
,
. 6
-
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x kcy
x kcrit
kc,z
. 6
-
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2
2
= 2 .
. 6
-
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2
(plywood) ,
.
.
. 6
()
-
7/21/2019 m2464_ec5
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G. Tampone, 2007
lv
. 6
-
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. 6
-
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, ,
(hef)
(. kv)
.
(Piazza at al., 2009)
kv ,
.
. 6
-
7/21/2019 m2464_ec5
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1.
i=0 ()
2.
kv
= 1,0.Piazza at al., 2009
. 6
-
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.
-
7/21/2019 m2464_ec5
131/142
.
. 7
-
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( uinst
).
(ucreep).
, , . , . ser
(EC6 ). .
. 7
:
( ( ) G
-
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( (u inst). mean, Gmean
(ucreep).
() u net,fin = u inst + u creep - uc = ufin - uc
. 7
:
inst . mean, mean
-
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(ucreep).
() u fin = u inst + u creep = unet,fin
. 7
:
-
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(ucreep
). kdef
=u fin = u inst + u creep
,creep
u Q,creep = 2 kdefuinst ()
. 7
u G cree = kdefuinst ( kdef
(. 1 995-1-1 , 3.2, Ammendment,EN 1995-1-1:2004/A - June 2008)
)
-
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)
u Q1,creep = 2 kdefuinst (
1 2 3 (solid timber)
E (glued laminated
EN 1408-1-1
EN 14080
5
t m er
(laminated veneer lumber - LVL)
EN 1 4374, EN 14279
,
,
,
-
, (plywood)
EN 636636-1 0,80
-
-
kdef
636-2
636-30,80
0,80
1,00
1,00
-
2,50
(riented Strand
Boards - OS B)
300
OSB/2
OSB/3, OS B/4
2,25
1,50
-
2,25
-
-
.
(particleboards) 312P4
P5
P6P7
2,25
2,25
1,501,50
-
3,00
-2,25
-
-
--
-
(60% 1
200%
(Fibreboards hard hardboards)
-
HB.LA,HB.HLA1, HB.HLA2
2,252,25
-3,00
--
(Fibreboards medium mediumboards)
622-3
MBH.LA, MBH.LA 2 .LS1, .LS2
3,003,00
-4,00
--
3).
(Fibreboards MDF)
EN 622-5
MDF.LA,MDF.HLS
2,252,25
-3,00
--
. 7
kdef
(. 1 995-1-1 , 3.2, Ammendment,EN 1995-1-1:2004/A - June 2008)
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1 2 3 (solid timber)
E (glued laminated
EN 1408-1-1
EN 14080
t m er
(laminated veneer lumber - LVL)
EN 1 4374, EN 14279
,
,
,
-
, (plywood)
EN 636636-1 0,80
-
- 636-2
636-30,80
0,80
1,00
1,00
-
2,50
(riented Strand
Boards - OS B)
300
OSB/2
OSB/3, OS B/4
2,25
1,50
-
2,25
-
-
(particleboards) 312P4
P5
P6P7
2,25
2,25
1,501,50
-
3,00
-2,25
-
-
--
-
(... ~30%)
, kdef
(Fibreboards hard hardboards)
-
HB.LA,HB.HLA1, HB.HLA2
2,252,25
-3,00
--
(Fibreboards medium mediumboards)
622-3
MBH.LA, MBH.LA 2 .LS1, .LS2
3,003,00
-4,00
--
.
1,0.
(Fibreboards MDF)
EN 622-5
MDF.LA,MDF.HLS
2,252,25
-3,00
--
. 7
-
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. 7
1. u fi = u t fi
-
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5 (1995-1-1, 2.2.3 (2),
u fin unet,fin
, ,
()
1990.
(. 1995-1-1, 7.2).
uinst
unet,fin
l/300 l/250
Gkj + Qk,1 + 0,i Qk,i (EN 1990 (6.14b))
l/150 l/125inst inst,Gj inst,Q,1 0,i inst,Q,k,i
(),
uinst,Q = uinst,Q,1 +0,i uinst,Q,k,i < l /300 ()
. 7
2.
u fi = u t fi
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u fin unet,fin
5 (1995-1-1, 2.2.3 (3),
, ufin, 1990.
(. 1995, 1-1, 7.2).
uinst
unet,fin
Gkj + 2,i Qk,i
l/300 l/250
:
ufin = u + u + u
l/150 l/125
= uinst,G (1+kdef) + uinst,Q1 (1+2,1 kdef) + uinst,Qi ( 0,i + 2,i kdef ) < l /250
-
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:
.
(.
).
.
-
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