梁模板(扣件式)计算书10层梁
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一、工程属性
梁底支撑小梁最大悬挑长度(mm) 200 结构表面的要求结构表面隐蔽
平面图
立面图
四、面板验算
面板类型覆面木胶合板面板厚度(mm) 12 面板抗弯强度设计值[f](N/mm2) 15 面板弹性模量E(N/mm2) 10000
W=bh2/6=1000×12×12/6=24000mm3,I=bh3/12=1000×12×12×12/12=144000mm4
q
1=γ
×max[1.2(G
1k
+(G
2k
+G
3k
)×h)+1.4Q
2k
,
1.35(G
1k +(G
2k
+G
3k
)×h)+1.4ψ
c
Q
2k
]×b=0.9×max[1.2×(0.1+(24+1.5)×1)+1.4×2,
1.35×(0.1+(24+1.5)×1)+1.4×0.7×2]×1=3
2.868kN/m
q
1静=0.9×1.35×[G
1k
+(G
2k
+G
3k
)×h]×b=0.9×1.35×[0.1+(24+1.5)×1]×1
=31.104kN/m
q
1活=0.9×1.4×0.7×Q
2k
×b=0.9×1.4×0.7×2×1=1.764kN/m
q
2=[G
1k
+(G
2k
+G
3k
)×h]×b=[0.1+(24+1.5)×1]×1=25.6kN/m
1、强度验算
M
max =0.125q
1
L2=0.125q
1
l2=0.125×32.868×0.152=0.092kN·m
σ=M
max
/W=0.092×106/24000=3.852N/mm2≤[f]=15N/mm2满足要求!
2、挠度验算
ν
max =0.521q
2
L4/(100EI)=0.521×25.6×1504/(100×10000×144000)=
0.047mm≤[ν]=l/250=150/250=0.6mm满足要求!
3、支座反力计算
设计值(承载能力极限状态)
R
1=R
3
=0.375 q
1静
l +0.437 q
1活
l=0.375×31.104×0.15+0.437×1.764×0.15=
1.865kN
R
2=1.25q
1
l=1.25×32.868×0.15=6.163kN
标准值(正常使用极限状态)
R
1'=R
3
'=0.375 q
2
l=0.375×25.6×0.15=1.44kN
R
2'=1.25q
2
l=1.25×25.6×0.15=4.8kN
五、小梁验算
小梁截面惯性矩I(cm4) 213.33 验算方式三等跨连续梁
q
1
=
max{1.865+0.9×1.35×[(0.3-0.1)×0.3/2+0.5×1]+0.9×max[1.2×(0.5+(24+1. 1)×0.12)+1.4×2,
1.35×(0.5+(24+1.1)×0.12)+1.4×0.7×2]×((0.9-0.45)-0.3/2)/2×1,
6.163+0.9×1.35×(0.3-0.1)×0.3/2}=6.199kN/m
q
2
=
max{1.44+(0.3-0.1)×0.3/2+0.5×1+(0.5+(24+1.1)×0.12)×((0.9-0.45)-0.3/2
)/2×1,4.8+(0.3-0.1)×0.3/2}=4.83kN/m
1、抗弯验算
M
max =max[0.1q
1
l
1
2,0.5q
1
l
2
2]=max[0.1×6.199×0.92,0.5×6.199×0.22]=
0.502kN·m
σ=M
max
/W=0.502×106/53330=9.416N/mm2≤[f]=13N/mm2满足要求!
2、抗剪验算
V
max =max[0.6q
1
l
1
,q
1
l
2
]=max[0.6×6.199×0.9,6.199×0.2]=3.348kN
τ
max =3V
max
/(2bh
)=3×3.348×1000/(2×50×80)=1.255N/mm2≤[τ]=
1.4N/mm2满足要求!
3、挠度验算
ν
1=0.677q
2
l
1
4/(100EI)=0.677×4.83×9004/(100×9600×2133300)=
1.048mm≤[ν]=l
1
/250=900/250=3.6mm
ν
2=q
2
l
2
4/(8EI)=4.83×2004/(8×9600×2133300)=0.047mm≤[ν]=2l
2
/250
=2×200/250=1.6mm满足要求!
4、支座反力计算
梁头处(即梁底支撑主梁悬挑段根部)
承载能力极限状态
R
max =max[1.1q
1
l
1
,0.4q
1
l
1
+q
1
l
2
]=max[1.1×6.199×0.9,
0.4×6.199×0.9+6.199×0.2]=6.137kN
同理可得,梁底支撑小梁所受最大支座反力依次为R
1=2.484kN,R
2
=6.137kN,
R
3
=3.349kN
正常使用极限状态
R'
max =max[1.1q
2
l
1
,0.4q
2
l
1
+q
2
l
2
]=max[1.1×4.83×0.9,
0.4×4.83×0.9+4.83×0.2]=4.782kN
同理可得,梁底支撑小梁所受最大支座反力依次为R'
1=2.063kN,R'
2
=4.782kN,
R'
3
=2.928kN 六、主梁验算