储罐螺栓座计算



储罐螺栓座计算书

项目号 ITEM NO.

CALCULATION OF ANCHOR CHAIR

文件号 DOC. NO.

本计算书是参照《AISI E-1，Volume II, Part VII“Anchor Bolt Chairs”》编制。

This calculation sheet is prepared referring to  AISI E-1，Volume II, Part VII“Anchor Bolt Chairs”

输入数据 Input Data

注：

a

=

210

mm

1.黄色的背景是需要输入的项，红色字体为结果不合格。

b

=

203

mm

2.垫板推荐宽度W=1.65√R(ttr)=

1228.25

，依据为局部应力的范围,仅供参考。

c

=

35

mm

3.一个地脚螺栓的最大拉应力一种算法为为地脚螺栓根径截面积*地脚螺栓屈服强度，H34里公式为=H23*PI()*(H24)^2/4

d

=

60

mm

螺栓直径公制

42

螺栓直径英制

2 1/4"

e

=

128

mm

螺纹根径

37.129

螺纹根径

53.026

g

=

110

mm

或者采用Tank软件推荐的螺栓，如推荐M42的地脚螺栓，实际用的M56，则输入M42的地脚螺栓根径

h

=

350

mm

或者在H34格中填写tank软件计算完成后的地脚螺栓计算中取load/bolt中的最大值。

j

=

22

mm

m

=

12

mm

v

=

68

mm

tr

=

16

mm

储罐内径 Inner diameter of tank

ID

=

34100

mm

最下节罐壁壁厚(去除厚度附加量)The thickness of lowest shell （exclude additional thickness）

t

=

16.5

mm

地脚螺栓屈服强度The yeild stress of anchor bolt

Sy

=

229

Mpa

地脚螺栓螺纹小径The min. diameter of anchor bolt

db

=

37.129

mm

壁板材料及设计温度下的许用应力The shell material and allow stress at TEMP.

SA-283 Gr.C

[σ]S

=

137.9

MPa

筋板材料及设计温度下许用应力Material and Allow stress of gusset

SA-283 Gr.C

[σ]G

=

137.9

MPa

盖板材料及设计温度下许用应力Material and Allow stress of cover plate

SA-283 Gr.C

[σ]Z

=

137.9

MPa

筋板弹性模量 elasticity modulus of gusset

Et

=

198000

MPa

设计计算 Checking strength

储罐半径 The radius of tank

R=ID/2

17050

mm

螺栓孔边缘到顶板外缘的距离Distance from outside of top plate to edge of hole

f=min(b-e-d/2,e-d/2)

50.5

mm

一个地脚螺栓承受的最大拉应力 The max. load for one anchor bolt

P=Sy*πdb2/4

247943.01

N

1）筋板计算The calculation of gusset

筋板压应力 The compression stress of gusset

σG=P/(2c(b-tr))=

18.9

Mpa

细长比Slenderness ratio

λ=0.5h/(0.289c)=

17.3

临界细长比 The critical slenderness ratio

153.7

系数Factor

1.5

筋板许用压应力[σ]c计算The calculation of gusset allow compression stress [σ]c：

当When  λ<=λc

90.95

MPa

当When  λ>λc

3014.04

MPa

Because λ

<=

λc

So:

[σ]c

=

90.95

MPa

Since [σ]c>=σG, 筋板合格The Gusset is OK.

2)盖板计算The calculation of cover plate

σZ=P(0.375g-0.22d)/(fc2)

112.4

MPa

Since [σ]z>=σz, 盖板合格.The Cover plate is OK

3)螺栓座罐壁局部应力计算The local stress of tank shell on the anchor chair

罐壁应力系数Reduction factor

1.00

螺栓座罐壁局部应力局部应力为The local stress of tank shell on the anchor chair:

69.82

MPa

Since [σ]S>=σS, 局部应力合格.The local stress is OK