不同海拔高度对毛竹主要物理力学性质的影响3 - ICBR

, 2007, 34 (2) : 2222225
Journal of Anhui Agricultural University
3
1 , 2 , 2 , 1 , 1
(11,230036; 21,100102)
:,
: (1) ,
01699 01715 g cm - 3 ;01798 01827 g cm - 3 ,0105T2
(2) 12 368128 11 934107, 551858
5918401831203 1961293 MPa, ,0105T2
:;;;;;
: S781129 : A : 16722352X (2007) 0220222204
Effects of d ifferen t a ltitudes on ma in physica l and m echan ica l properties of bam boo
WANG You2hong 1 , TIAN Gen2lin 2 , L IU Xing2e 2 ,WANG Chuan2gui 1 , KE Shu2hua 1
(11School of Forestry and Landscape A rchitecture, Anhui Agricultural University, Hefei 230036;
21 International Centre for Bamboo and Rattan, Beijing 100102)
Abstract: The main physical and mechanical p roperties of bamboo was measured to investigate the effects of
different altitudes on those p roperties. The results show that both of the air2dry density and basic density increase a2
long with axial height and the altitude increasing. The basic density of bamboo at foot and top of the hill are 01699
g cm - 3 and 01715 gcm - 3 , and the air2dry density are 01798 gcm - 3 and 01827 gcm - 3 respectively. Both the
density differences between the bamboo at foot and top of the hill are significant. The modulus of elasticity in static
bending, the comp ressive strength parallel to grain and the bending strength of bamboo at foot and top of the hill are
12 368128 MPa & 11 934107 MPa, 551858 MPa & 591840 MPa and 1831203 MPa & 1961293 MPa respectively.
Among them, the differences between the comp ressive strength parallel to grain, the bending strength of bamboo at
foot and top of the hill are also significant.
Key words: bamboo; altitude; density; modulus of elasticity in static bending; the comp ressive strength parallel
to grain; the bending strength
,
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Lehaie),
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[ 10 ] ,4 hm 2 ,
200 m,20pH 615
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018,6,11 m,
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4 t
5 t (01001
g)
112
, [ 11 ]
Item
/m
A ltitude
1
Table 1The growth situations of bamboo
/%
Reen MC
/cm
DBH
/m
Height
/m
Height of branch
(HF) Foot of hill 200 9612 71824 1315 516
(HT) Top of hill 300 8213 81092 1414 518
2
211
,
1,,,
[ 12214 ]
115 215 315 415515 m
,
,017% 116%
114% 413%218% ;
214% 118% 216% 611%415%
01699 gcm - 3 ,
01715 gcm - 3 ,
213% ,
[ 15 ] 01798 g
cm - 3 ,01827 gcm - 3 ,
316%T2,: t stat = - 51405, t
0105 = 11981,0105 ;
: t stat = - 31704, t 0105 = 11981,0105
A1Basic density at HF; a1
Basic density at HT; B1A ir2dry density at
HF; b1A ir2dry density at HT
1
Figure 1Effects of different altitudes on bamboo density
,,
,,,
,;
,,,
,,,

224
2007
, [ 12214 ]
212
21211
,
2,
21212
3,
,
,
,215515 m ,
11 934107 MPa;
12 368128 MPa,
,
315%0105T2( t stat =
11443, t 0105 = 11981)
21213
,
,
,4
A1Comp ressive strength parallel to
grain at HF; a1Comp ressive strength
parallel to grain at HT
2
Figure 2Effects of different altitudes on comp ressive strength
parallel to grain of the bamboo
551859 MPa;
591840 MPa,
,711%0105T2
( t stat = - 21802, t 0105 = 11981)
,,
,,,,
[ 12214 ]
A1Modulus of elasticity in static ben2
ding at HF; a1Modulus of elasticity in
static bending at HT
3
Figure 3Effects of different altitudes on modulus of elas2
ticity in static bending of bamboo
A1Bending strength at HF; a1
Bending strength at HT
4
Figure 4Effects of different altitudes on bending strength of
the bamboo
1831203 MPa,
1961293 MPa,
711% , [ 15 ] 0105T2
( t stat = - 31880, t 0105 = 11981)
,,,,
3
,
01699 gcm - 3 , 01715 gcm - 3 ;01798
01827 gcm - 3
213% ,

342
225
316%
,0105T2
: 551858 MPa591840 MPa 1831203 MPa
1961293 MPa,
,,
711% ,
0105,T2
,
12 368128 MPa 11 934107 MPa,
315% ,
0105,T2
,,
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