CN104652679B - Variable-cross-section mixing type arch top net case for storage tank - Google Patents
Variable-cross-section mixing type arch top net case for storage tank Download PDFInfo
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- CN104652679B CN104652679B CN201510048401.9A CN201510048401A CN104652679B CN 104652679 B CN104652679 B CN 104652679B CN 201510048401 A CN201510048401 A CN 201510048401A CN 104652679 B CN104652679 B CN 104652679B
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- reticulated shell
- rod member
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Abstract
The invention discloses a variable-cross-section mixing type arch top net case for a storage tank, and relates to the field of oil gas storage and transportation. The invention provides the structural form of the variable-cross-section mixing type arch top net case for the storage tank through the structural optimization and value simulation in consideration of the requirements of light weight of the large-scale arch top net case storage tank. Compared with the existing storage tank arch top net case, the variable-cross-section mixing type arch top net case has the following advantages that (1) the storage tank arch top net case is developed to the trend of light weight, the stress condition of the integral structure is sufficiently considered, the materials can be effectively saved on the premise of ensuring the sufficient intensity, rigidity and stability, and in addition, the safety is ensured; (2) the load transferred to the lower part tank body from the net case top is reduced, so that the deformation and the stress of the tank wall top structure of the arch top net case storage tank are reduced, and further, the design idea of strong tank and weak top of the large-scale arch top storage tank is further embodied; (3) all net case rod elements can be easily distinguished and classified, and the convenience of field construction and installation is improved.
Description
Technical field
The present invention relates to a kind of storage tank variable cross-section mixed type vault reticulated shell, belong to petrochemical industry warehousing and transportation facilities field.
Background technology
With the increase of energy demand, product oil warehouse assumes maximization, scale, the arch-roof tank of auxiliary construction or interior
The volume of floating roof tank is increasing.It is referred from wide variety of latticed shell structure in civil engineering and there is big, reasonable stress of span etc.
Feature, large-scale finished product oil tank begins with vault reticulated shell as residual oil in tank.The latticed shell structure of domestic at present more employing is
Reticulated Domes, main inclusion bidirectional meridian type reticulated shell, moral of showing severity Le type reticulated shell, Kiewitt spherical domes, connection square reticulated shell
And geodesic domes etc., wherein Kai Weite is more reasonable with the latticed shell structure of connection side's mixed type.Vault reticulated shell storage tank is used for
Store product oil, should follow the design principle of " strong tank weak top ", even if occur to lose efficacy also to ensure the intact of bottom tank body, unlikely
In causing huge economy and security loss.
However, existing storage tank vault latticed shell structure typically adopts sectional dimension identical rod member, there is problems with：
（1）The actually stress of each rod member of reticulated shell uneven, if bar cross section size is all identical, inevitable to carry the most dangerous bar
The stressing conditions of part determining rod member specification, and for some stress less rod member it is impossible to give full play of the performance of material,
Stock utilization is low, less economical, and for large-scale vault reticulated shell storage tank, this puts especially prominent；（2）For storage tank vault net
Shell, suffered fixed load includes the gravity laod of reticulated shell rod member and eyelid covering, and this fractional load can be delivered to bottom tank body, and tank skin
A few circle steel plates at top only have 10mm, if load is excessive, bottom tank body can be adversely affected it is impossible to embody vault net
The design principle of shell storage tank " strong tank weak top ".So, in the case that skin gage determines, reticulated shell rod member should be reduced as far as possible
Gravity laod, that is, reduce the specification of rod member.
Content of the invention
The purpose of the present invention be overcome above-mentioned the deficiencies in the prior art in place of, according to Analysis results of numerical simulation, comprehensive network
Shell rod member stress and monolithic stability implementations, propose a kind of variable cross-section mixed type vault reticulated shell being applied to large-scale storage tank, full
On the premise of sufficient intensity, rigidity and stability requirement, can effective material-saving, reduce reticulated shell top simultaneously and pass to bottom tank body
Load is to reduce deformation and the stress of vault reticulated shell storage tank shell top structure, and rod member is readily discernible and sorts out, and is easy to pacify
Dress.
For achieving the above object, the technical solution used in the present invention is as follows：A kind of storage tank variable cross-section mixed type vault net
Shell, including Kn Kiewitt spherical domes, is centered around the peripheral connection square reticulated shell of Kn Kiewitt spherical domes and is arranged on connection square net
The nM of shell outer shroud1Individual bearing quarter butt, wherein K is the code name of Kai Weite type, and n represents the number circumferentially split, M1For the triumphant Witter of Kn
The number of rings of type reticulated shell.
Further, the rod member in described vault reticulated shell is divided into four parts, and Part I is bearing quarter butt；Part II
For the nM in Kn Kiewitt spherical domes1The outmost turns ring rod member of root main rib rod member and connection square reticulated shell, Kn Kiewitt spherical domes
Middle outmost turns acyclic to rod member and connection square reticulated shell in acyclic to rod member；Part III is Kn Kiewitt spherical domes and connection
Remaining ring rod member in the ring rod member that square reticulated shell has, and connection square reticulated shell；Part IV is Kn triumphant Witter type net
Remaining rod member in shell；The wherein sectional dimension of the rod member of the sectional dimension of the rod member of Part I, Part II, Part IV
The sectional dimension of rod member, the sectional dimension of the rod member of Part III be sequentially reduced, and all rod members is highly consistent.
Further, Kn Kiewitt spherical domes number of rings M1Account for the 60% to 80% of total number of rings M of described vault reticulated shell, join square net
Girdle number M2Account for the 20% to 40% of total number of rings M of vault reticulated shell.
Further, all reticulated shell rod members adopt welded H section steel.
A kind of application of vault reticulated shell, described vault reticulated shell is applied to storage tank；Described storage tank includes vault reticulated shell, tank
Wall, collar tie beam and steel eyelid covering, vault reticulated shell passes through nM1Individual bearing quarter butt is arranged on collar tie beam, and collar tie beam is arranged on tank skin, described steel
Eyelid covering is laid in vault reticulated shell.
Compared with the prior art, the present invention has the beneficial effect that：
1st, the present invention considers integrally-built stressing conditions, is ensureing that structure has sufficient intensity, rigidity and stability
On the premise of, material property can be made full use of, thus material-saving is to lightweight development it is ensured that safety and economy；
2nd, the present invention can reduce the load passing to bottom tank body from reticulated shell top, thus reducing vault reticulated shell storage tank shell top
The deformation of portion's structure and stress, embody the design concept of Large-scale Storage Tank with Dome Roofs " strong tank weak top " further；
3rd, the present invention makes reticulated shell rod member readily discernible and sorts out, and increased field erected convenience.
Brief description
Fig. 1 is the general structure schematic diagram of the present invention；
Fig. 2 is the partial structural diagram of the present invention；
Fig. 3 is the rod member specification grade distribution schematic diagram of the present invention；
Fig. 4 is welded H section steel sectional view；
Fig. 5 is rod member specification identical vault reticulated shell storage tank FEM model schematic diagram；
Fig. 6 is variable cross-section vault reticulated shell FEM model schematic diagram；
Fig. 7, Fig. 8 are I, II enlarged drawing of Fig. 6 respectively；
In figure label：1. triumphant Witter reticulated shell, 2. connection square reticulated shell, 3. bearing quarter butt, 4. main rib rod member, 5. connection square reticulated shell
With Kiewitt spherical domes region adjacent thereto, the 6. triumphant Witter reticulated shell ring rod member total with connection square reticulated shell, 7. connection square
Remaining ring rod member in reticulated shell, 8. reticulated shell outmost turns ring rod member.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Referring to Fig. 1, a kind of variable cross-section mixed type vault latticed shell structure of storage tank is：Including Kn Kiewitt spherical domes 1, connection
Square reticulated shell 2 and bearing quarter butt 3, connection square reticulated shell 2 is located at the periphery of Kn Kiewitt spherical domes 1, and bearing quarter butt 3 is arranged on connection
On the outer shroud of square reticulated shell 2, for vault reticulated shell is arranged on tank skin and collar tie beam.Whole vault latticed shell structure has M ring, its
Middle Kn Kiewitt spherical domes 1（K is the code name of Kai Weite type, and n represents the number circumferentially split）Occupy the M at middle part1Ring, connection
Square reticulated shell 2 occupies M2Ring（M=M1+M2).
As shown in Figures 2 and 3, storage tank of the present invention all bar cross section sizes of variable cross-section mixed type vault reticulated shell are not
Unanimously, the situation according to reticulated shell rod member stress and stability in the large, the principle using variable cross-section is selected to bar cross section size
Take, be classified as 1., 2., 3., 4. four grades, wherein 1. represent that sectional dimension is maximum, specific as follows：nM1Individual bearing quarter butt 3
Not only worst in stress, or the tie of connection reticulated shell top and bottom tank body, for ensureing its safety, the section of bearing quarter butt 3
Size is taken as maximum, as the first estate 1., and determines other rod member specifications as benchmark（Determine the height of other rod members
H）；NM in Kn Kiewitt spherical domes1Root main rib rod member（4）With connection square reticulated shell（2）Outmost turns ring rod member（8）Stress
Larger, 2. these bar cross sections are taken as the second grade, simultaneously take account of reticulated shell occur unstability typically from Kn Kiewitt spherical domes 1 with
The joint portion of connection square reticulated shell 2 starts, and the stress of ring rod member is less, therefore by all acyclic in region 5 to rod member（I.e.
In Kn Kiewitt spherical domes outmost turns acyclic to rod member and connection square reticulated shell（2）In acyclic to rod member）Specification be taken as
Second grade 2., to ensure that this region has enough rigidity；By remaining inside Kai Weite reticulated shell of region 5 rod member stress more
Uniformly, as the tertiary gradient 3.；Finally, the ring rod member 6 that Kn triumphant Witter reticulated shell 1 is had with connection square reticulated shell 2, and connection square
Remaining ring rod member 7 stress in reticulated shell is less, can be taken as the fourth estate 4..
The gusset-type joint that connects through between rod member is realized, for ease of installing, all rod members size H in the height direction
Must be consistent（As shown in Figure 4）.Above-mentioned sectional dimension can be by adjusting rod member cross-sectional width B, web thickness t1, edge of a wing thickness t2
To realize.
Preferably, all reticulated shell rod members adopt welded H section steel, reference standard YB 3301-2005《Welded H section steel》.Welding
, as shown in figure 4, model WH H × B, wherein H is height, and B is width, t for H profile steel sectional view and label symbol1Thick for web
Degree, t2For edge of a wing thickness.Preferably, Kiewitt spherical domes number of rings M1Preferably account for the 60% to 80% of total number of rings M of structure, join square reticulated shell
Number of rings M2Account for the 20% to 40% of total number of rings M of structure.
In construction, complete periphery connection square reticulated shell and nM first1The assembling of individual bearing quarter butt, then n is completed by scaffold
NM is amounted on individual main rib direction1The assembling of root rod member, then on the basis of these main rib rod members, ecto-entad completes remaining rod member
Assembling.Wherein, each rod member by belonging to Kiewitt spherical domes or can join square reticulated shell, belong to n region of Kiewitt spherical domes
In which part, to sort out numbering further in accordance with its rod member specification grade, to be so favorably improved installation convenience.
Whole vault reticulated shell is sling after assembling and is arranged on tank skin collar tie beam, completes the connection of bearing and collar tie beam, finally in vault reticulated shell
Top laying steel eyelid covering composition tank deck.
Whole reticulated shell passes through nM1Individual bearing quarter butt 3 is supported on tank skin and collar tie beam, and then laying steel eyelid covering forms sealing.
Embodiment 1
One volume is the mixed type vault reticulated shell storage tank of 30,000 sides, and span is 46m, rise 6.16m, the radius of sphere net case
For 46m, whole reticulated shell has 10 rings, and wherein Kiewitt spherical domes account for 8 rings at middle part, and outmost turns 2 ring is connection square reticulated shell.Top
The steel eyelid covering of 3mm is laid in portion, is converted into area load 500Pa, is a part for fixed load；Additional load is 1200Pa.
Set up vault reticulated shell storage tank FEM (finite element) model using general finite element software ANSYS, as shown in Figure 5.Wherein, rod member
Using space beams with thin-wall unit B EAM188, tank skin adopts shell unit SHELL181.Meeting reticulated shell intensity, rigidity and monolithic stability
Property require on the premise of, rod member uniform specification adopt WH150 × 100 × 5 × 8mm, that is, H profile steel depth of section be 150mm, width
For 100mm, web thickness is 5mm, and edge of a wing thickness is 8mm.Known by calculating and post processing, now rod member steel using amount is 42.6t,
Tank skin top strain is 95.0MPa, and horizontal direction is deformed into 8.5mm.
Set up variable cross-section vault reticulated shell storage tank FEM (finite element) model under identical design parameter, as shown in figs 6-8（Only show
Vault reticulated shell part）.Rod member specification is divided into four grades according to mentioned above principle, is respectively：①WH150×100×5×8mm；②
WH150×100×4×6mm；③WH150×100×3.2×4.5mm；④WH150×75×3.2×4.5mm.In this feelings
Under condition, the intensity of reticulated shell, rigidity and stability in the large also can meet requirement.Known by calculating and post processing, now rod member is used
Steel amount is 28.2t, and tank skin top strain is 92.0MPa, and horizontal direction is deformed into 7.6mm.It can be seen that, in this example, adopt
The present invention can not only reduce by about 34% reticulated shell rod member steel using amount, improves economy, and on the premise of ensureing reticulated shell safety,
The stress value at tank skin top about 3% and 10% horizontal direction deflection can also be reduced, embody Large-scale Storage Tank with Dome Roofs " strong tank further
The design concept on weak top ".In addition, the division of rod member specification grade, additionally aid the identification of rod member and classification during installation, improve peace
Dress convenience.
The present invention is only limited by claims and its four corner and equivalent.Disclosed above is only the present invention
Preferred embodiment, but be not used for limiting itself, any be familiar with those skilled in the art without prejudice to present invention spirit
In the case of intension, the impartial change done and change, all should be within the scope of the present invention.
Claims (3)
1. a kind of storage tank with variable cross-section mixed type vault reticulated shell it is characterised in that：Including Kn Kiewitt spherical domes（1）, be centered around
Kn Kiewitt spherical domes（1）The connection square reticulated shell of periphery（2）, and be arranged on connection square reticulated shell（2）The nM of outer shroud1Individual bearing is short
Bar（3）, wherein K is the code name of Kai Weite type, and n represents the number circumferentially split, M1Number of rings for Kn Kiewitt spherical domes；Arch
Rod member in the reticulated shell of top is divided into four parts, and Part I is bearing quarter butt（3）；Part II is Kn Kiewitt spherical domes（1）
In nM1Root main rib rod member（4）With connection square reticulated shell（2）Outmost turns ring rod member（8）, Kn Kiewitt spherical domes（1）In
Outer ring acyclic to rod member and connection square reticulated shell（2）In acyclic to rod member；Part III is Kn Kiewitt spherical domes（1）With
Connection square reticulated shell（2）Total ring rod member（6）, and connection square reticulated shell（2）Remaining interior ring rod member（7）；Part IV
For Kn Kiewitt spherical domes（1）In remaining rod member；The wherein rod member of the sectional dimension of the rod member of Part I, Part II
Sectional dimension, the sectional dimension of the rod member of Part IV, the sectional dimension of the rod member of Part III are sequentially reduced, and all rod members
Highly consistent；Kn Kiewitt spherical domes（1）Number of rings M1Account for the 60% to 80% of total number of rings M of described vault reticulated shell, join square reticulated shell
（2）Number of rings M2Account for the 20% to 40% of total number of rings M of vault reticulated shell.
2. storage tank according to claim 1 with variable cross-section mixed type vault reticulated shell it is characterised in that：All reticulated shell rod members are adopted
Use welded H section steel.
3. a kind of application of the vault reticulated shell described in claim 1 is it is characterised in that be applied to storage tank by described vault reticulated shell；
Described storage tank includes vault reticulated shell, tank skin, collar tie beam and steel eyelid covering, and vault reticulated shell passes through nM1Individual bearing quarter butt（3）It is arranged on collar tie beam
On, collar tie beam is arranged on tank skin, and described steel eyelid covering is laid in vault reticulated shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510048401.9A CN104652679B (en) | 2015-01-30 | 2015-01-30 | Variable-cross-section mixing type arch top net case for storage tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510048401.9A CN104652679B (en) | 2015-01-30 | 2015-01-30 | Variable-cross-section mixing type arch top net case for storage tank |
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| CN104652679B true CN104652679B (en) | 2017-02-22 |
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| US3950901A (en) * | 1974-11-04 | 1976-04-20 | Sumner John S | Domical structure with novel beam interlocking connections |
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| CN100532750C (en) * | 2007-03-30 | 2009-08-26 | 北京工业大学 | Cord string branch dome |
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