储罐带肋球壳拱顶计算



带肋球壳拱顶

项目号 ITEM NO.

注：

Calculation of  Dome with ribs

文件号 DOC. NO.

1

黄色的背景是需要输入的项，蓝色字体为结果。如果出现红色文字，则说明计算不通过。

2

参考标准GB/T50341-2014附录H和和其条文说明。

3

密闭油罐拱顶带肋球壳的曲率半径不宜大于40m

本计算书是参照GB/T50341-2014 附录H编制的。

4

肋条间距

1400

不得大于1500mm

This calculation sheet is prepared referring to GB/T50341-2014  appendix H.

5

肋高厚比

8

不宜大于12

6

固定顶的设计外载不应小于1.2KPa，见GB50341 7.1.2

图示FIG

7

罐顶和罐壁处连接面积请按照GB50341或者API650附录F计算.

输入数据 Input Data

或按照角钢圈类型计算，尺寸见API650附录F，及下图：

角钢圈类型 Type of angle ring

b

tc

=

8

mm

ta

=

16

mm

tb

=

0

mm

ts

=

0

mm

Le

=

80

mm

Note:按照GB50341，Le应小于16ta According to GB50341, Le shall be less than 16ta

固定顶的设计外载荷                                                                                               Design load of self-supporting dome

PL=

2.2

KPa

罐顶与罐壁连接处的有效面积                                                   Effective Cross-sectional area in the dome roof-to-shell joint

A=

5301.27

mm2

储罐直径 Diameter of Tank

D=

30

m

球壳曲率半径 Dome radius

RS=

34.8

m

设计温度下钢材弹性模量                                                     Modulus of Elasticity at design temperature

E=

191000

MPa

罐顶板的有效厚度 Effective thickness of roof

th=

6

mm

纬向肋宽度 Latitude rib width

h1=

80

mm

纬向肋有效厚度 Effective Latitude rib thickness

b1=

10

mm

纬向肋在经向的间距                                                             Distance of Latitude rib at longitude

L1S=

1301

mm

经向肋宽度 Longitude rib width

h2=

80

mm

经向肋有效厚度 Effective Longitude rib thickness

b2=

10

mm

经向肋在纬向的间距                                                                   Distance of longitude rib at latitude

L2S=

1400

mm

设计计算 Checking strength

纬向肋与顶板在经向的组合截面形心到顶板中面的距离  Distance of  combination of cross-section centroid of latitudinal rib and roof plate to roof

3.997

mm

纬向肋与顶板在经向的面积折算系数 Area factor of Latitude rib and roof

1.102

16526.80

mm3

经向肋与顶板在纬向的组合截面形心到顶板中面的距离  Distance of  combination of cross-section centroid of longitude rib and roof plate to roof

3.739

mm

经向肋与顶板在纬向的面积折算系数 Area factor of longitude rib and roof

1.095

15449.49

mm3

带肋球壳的折算厚度               conversion of thickness of domewith rib

20.08

mm

带肋球壳的许用外载荷 Alloware load of dome with rib

3.48

KPa

罐顶与罐壁连接处许用截面积             Allowance Cross-sectional area in the dome roof-to-shell joint

[A]=4.6DRSPL/2.2

4802.4

mm2

[P]

≥

PL

It is safe

[A]

≤

A

It is safe