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

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