CN106799094A - A kind of dust collector box body H-shaped section Column stability enhancing construction and method - Google Patents
A kind of dust collector box body H-shaped section Column stability enhancing construction and method Download PDFInfo
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- CN106799094A CN106799094A CN201710052921.6A CN201710052921A CN106799094A CN 106799094 A CN106799094 A CN 106799094A CN 201710052921 A CN201710052921 A CN 201710052921A CN 106799094 A CN106799094 A CN 106799094A
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- 230000002708 enhancing effect Effects 0.000 title claims abstract description 47
- 238000010276 construction Methods 0.000 title claims abstract description 46
- 239000000428 dust Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003351 stiffener Substances 0.000 claims abstract description 117
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 112
- 239000010959 steel Substances 0.000 claims abstract description 112
- 238000005728 strengthening Methods 0.000 claims abstract description 100
- 238000005520 cutting process Methods 0.000 claims description 6
- 230000002452 interceptive effect Effects 0.000 claims description 6
- 230000003601 intercostal effect Effects 0.000 claims description 2
- 230000008093 supporting effect Effects 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 1
- 238000003466 welding Methods 0.000 abstract description 7
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- 239000003500 flue dust Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/001—Means for connecting filter housings to supports
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/82—Housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16S—CONSTRUCTIONAL ELEMENTS IN GENERAL; STRUCTURES BUILT-UP FROM SUCH ELEMENTS, IN GENERAL
- F16S1/00—Sheets, panels, or other members of similar proportions; Constructions comprising assemblies of such members
- F16S1/10—Composite members, e.g. with ribs or flanges attached
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Abstract
The invention discloses a kind of dust collector box body H-shaped section Column stability enhancing construction and method, belong to technical field of structural engineering.The present invention is interval to one piece of strengthening steel slab of each welding in the preceding edge of a wing both sides of H-shaped section column in the adjacent ribbed stiffener of the wallboard for having ribbed stiffener, and strengthening steel slab opposite side is welded in wallboard.The present invention clearly proposes the method for designing of this kind of H-shaped section Column stability enhancing construction simultaneously.Can make column that its stable bearing capacity be greatly improved on original architecture basics after implementing the present invention, column design section, and stability enhancing construction processing and fabricating facility can further be reduced with this, save steel, low production cost.
Description
Technical field
The present invention relates to a kind of dust collector box body H-shaped section Column stability enhancing construction and method, belong to Structural Engineering
Technical field.
Background technology
Deduster is to be widely used in being used to eliminate main force's environmental protection of flue dust in the industries such as thermoelectricity, metallurgy, chemical industry and building materials
Equipment, casing (can also claim housing) is most important of which process components.When casing building enclosure is using flat plate wall of putting more energy into
During plate-H-shaped (or I-shaped) section pillar construction system, the side wing edge of H-shaped section column one is with steel plate wallboard sequential welding in succession
Connect.Casing deadlight is subject to the lateral load that negative pressure and wind load are formed, and the lateral load of effect can be transmitted and is assigned on wallboard
On column so that column bears moment of flexure；Column top undertakes axial compressive force, therefore, it is a bending component that column is actual.Column exists
Main under moment of flexure and axial compressive force collective effect that unstable failure occurs, casing central post destruction position is frequently experienced in column and is close to
The local axial compression stress large area at top, and other most of regional stress levels are not high.
The content of the invention
It is an object of the invention to the column being directed in wallboard-H-shaped section pillar construction system, there is provided one kind can show
The reinforcing construction and method for strengthening the H-shaped section Column stability are write, is prone to lose to solve existing dust collector box body column
Steady destruction, the low problem of strength of materials utilization rate can thereby reduce column design section, mitigate dead load, so as to reduce
Production cost.
Therefore, being constructed the invention provides a kind of enhancing of dust collector box body H-shaped section Column stability, the deduster case
Body wallboard is the flat plate with ribbed stiffener, and one piece is each side welded in neighbouring intercostal region of putting more energy into, column web
Strengthening steel slab, the vertical edge of the strengthening steel slab one is welded to connect with the preceding edge of a wing of column, and another vertical edge is welded with dust collector box body wallboard
Connection.Stability enhancing construction can improve H-shaped section column and stability when bearing cross-brace is connected with wallboard.Ability
Field technique personnel it should be clear that the H-shaped section column edge of a wing being connected with wallboard be the rear edge of a wing, away from the H-shaped section column of wallboard
The edge of a wing is the preceding edge of a wing.
In one embodiment of the invention, H-shaped section Column stability enhancing is configured to strengthen deduster
The stability of casing.
In one embodiment of the invention, H-shaped section column can also be expressed as I-shaped cross-section column.
In one embodiment of the invention, for edge column, only the stability enhancing construction is arranged in side.
In one embodiment of the invention, the strengthening steel slab thickness is equal to casing wallboard wall thickness.
In one embodiment of the invention, the strengthening steel slab and the vertical attachment weld of wallboard are after wallboard and column
The distance of edge of a wing attachment weld is 100mm.
In one embodiment of the invention, the strengthening steel slab is along stem height direction arrangement interval：Work as column
When cross-brace is smaller than three ribbed stiffeners intervals, strengthening steel slab is only in the interval arrangement of first, top ribbed stiffener；Work as transverse direction
Branch tie distance more than or equal to three and it is interval less than six ribbed stiffeners when, strengthening steel slab is in the Liang Ge ribbed stiffeners area of top first and second
Between arrange；When cross-brace spacing is interval more than or equal to six ribbed stiffeners, strengthening steel slab is totally three, top first, second and third
The interval arrangement of ribbed stiffener.It will be apparent to those skilled in the art that the cross-brace is casing column suffered perpendicular to wallboard side
To support.
In one embodiment of the invention, the strengthening steel slab upper and lower ends are not connected with wallboard ribbed stiffener, root
According to ribbed stiffener section form, appropriate cutting strengthening steel slab is allowed to avoid interfering with ribbed stiffener edge.
The present invention also provides using a kind of dust collector box body H-shaped section Column stability enhancing construction to improve H-shaped
The method of section Column stability, wherein, the strengthening steel slab thickness is equal to casing wallboard wall thickness；Strengthening steel slab is vertical with wallboard
The distance of attachment weld edge of a wing attachment weld after wallboard and column is 100mm；Strengthening steel slab is along stem height direction arrangement area
Between be：When column cross-brace is smaller than three ribbed stiffeners intervals, strengthening steel slab is only in first, top ribbed stiffener interval
Arrangement；When cross-brace spacing more than or equal to three and it is interval less than six ribbed stiffeners when, strengthening steel slab is first and second liang of top
The interval arrangement of individual ribbed stiffener；When cross-brace spacing is interval more than or equal to six ribbed stiffeners, strengthening steel slab top first,
2nd, three interval arrangements of totally three ribbed stiffeners；Strengthening steel slab upper and lower ends are not connected with wallboard ribbed stiffener, according to ribbed stiffener section
Form, appropriate cutting strengthening steel slab is allowed to avoid interfering with ribbed stiffener edge.
The beneficial effects of the present invention are：Construction measure is strengthened using above-mentioned dust collector box body H-shaped section Column stability
Afterwards, can make dust collector box body column that its stable bearing capacity is significantly improved on original architecture basics.The present invention is especially suitable for
Wallboard is the flat plate situation with ribbed stiffener, it is only necessary to which the column top lower section high pressure stress region to being prone to unstability uses
Stability enhancing construction, this stability enhancing construction processing and fabricating facility, and save steel, no matter lateral load it is larger or
Dust collector box body column bearing capacity can be significantly improved in the case of less.
Brief description of the drawings
Fig. 1 is structural representation of the invention.
Fig. 2 is dust collector box body wallboard-pillar construction system FEM model and the office for not using stability to strengthen construction
Portion's enlarged drawing.
Fig. 3 is to carry out the enhanced dust collector box body wallboard of stability-pillar construction system finite element mould using the present invention
Type and partial enlarged drawing.
Fig. 4 bears lateral load schematic diagram for wallboard.
Fig. 5 be strengthening steel slab and the vertical attachment weld of wallboard after wallboard and column edge of a wing attachment weld apart from column
The influence relation curve of stability.
The vertical stress component and horizontal component schematic diagram of its active force when Fig. 6 is connected to preceding flange plate for strengthening steel slab is oblique.
Fig. 7 is the influence relation curve of strengthening steel slab thickness opposition column stability.
1：H-shaped section column；2：Strengthening steel slab；3：Wallboard ribbed stiffener；4：Steel plate wallboard；5：Diaphragm plate.
Specific embodiment
Further illustrate below in conjunction with the accompanying drawings and by specific embodiment and implementation result technical scheme and
Its forming process.It is understood that embodiment described herein is used only for explaining the present invention, rather than to limit of the invention
It is fixed.
Referring to the drawings shown in 1, accompanying drawing 1 is dust collector box body of the present invention (housing) H-shaped (I-shaped) section Column stability
Strengthen the structural representation of construction.3 areas of adjacent ribbed stiffener on the both sides steel plates wallboard 4 of dust collector box body H-shaped section column 1
One piece of strengthening steel slab 2 is welded in domain, and the side of the strengthening steel slab 2 is welded to connect with the preceding edge of a wing of H-shaped section column 1, opposite side and wall
Plate 4 is welded to connect, and strengthening steel slab 2 is arranged symmetrically in the web left and right sides of H-shaped section column 1, if H-shaped section column 1 is in
Casing edge, then steel plate wall plate 4 only adjacent with side be welded to connect.The strengthening steel slab 2 is along the short transverse of H-shaped section column 1
Arrangement interval is：Add when cross-brace (i.e. the suffered support perpendicular to the direction of wallboard 4 of H-shaped section column 1) is smaller than three
When strength rib is interval, strengthening steel slab 2 is only in the interval arrangement of first, top ribbed stiffener；When cross-brace spacing more than or equal to three and
When interval less than six ribbed stiffeners, strengthening steel slab 2 is in the interval arrangement of first and second two, top ribbed stiffener；When cross-brace spacing
When interval more than or equal to six ribbed stiffeners, strengthening steel slab 2 at top first, second and third, arrange by totally three ribbed stiffener intervals.It is described to add
Gu the thickness of steel plate 2 is equal to the wall thickness of casing wallboard 4.The strengthening steel slab 2 cuts with the vertical attachment weld of wallboard 4 away from wallboard 4 and H-shaped
The distance of edge of a wing attachment weld is 100mm after face column 1.The upper and lower ends of the strengthening steel slab 2 do not connect with wallboard ribbed stiffener 3
Connect, according to the section form of ribbed stiffener 3, appropriate cutting strengthening steel slab 2 is allowed to avoid interfering with the edge of ribbed stiffener 3.
Performance measurement of the present invention
The present invention is to the meter using the forward and backward dust collector box body H-shaped section Column stability of stability enhancing building method
Calculate, contrast and analysis carry out numerical simulation by FEM-software ANSYS, stability enhancing is preceding and stability is enhanced limited
Meta-model is as shown in accompanying drawing 2 and accompanying drawing 3.Finite element method (fem) analysis procedure declaration is as follows：
1st, definition unit：All structure members use Shell181 unit simulations.
2nd, definition material：Consider material nonlinearity influence, steel material uses ideal elastoplastic model, with Von-Mises
Criterion judges whether to surrender.Make deduster and typically use Q235 steel, its yield strength fy=235MPa, elastic modelling quantity
E=2.06 × 105MPa, Poisson's ratio ν=0.3.
3rd, restraint condition is applied：Casing (housing) wallboard top and casing top board of putting more energy into are connected, therefore on panel tops side
Boundary applies the translation constraint of vertical wallboard direction (Z-direction).Wallboard bottom is connected with ash bucket stiffened panels, therefore in wallboard bottom side edge
Boundary applies the translation constraint in vertical wallboard direction.Cross-brace (perpendicular to the wallboard direction) constraint that column is equally spaced,
Translation in column wallboard direction vertical with the applying of cross-brace junction is constrained.Add three directions in middle standing pillar post bottom application
Translation is constrained.Because flue gas is often high temperature in casing, in order to release temperature deforms, both sides column bottom only applies high along wallboard
Degree direction (Y-direction) and the constraint perpendicular to wallboard direction, to realize structure, (X to) can be with dilatation in wallboard plane.
4th, be further applied load situation：Dust collector box body wallboard is subject to wind load and inside and outside differential pressure (negative pressure) in the process of running
Produce the lateral load perpendicular to wallboard.It is dust load and later stage maintenance load, clear after equipment investment is using a period of time
Manage the vertical loads such as the rapping load of dust stratification and column is delivered to by casing top supporting structure, therefore column bears axial direction at top
Pressure.Said process causes the deduster to have notable difference in the force-bearing situation of different operational phases over time, further, since work
Skill condition is different, and the lateral load level that the dust collector box body wallboard for causing bears is discrepant, it is therefore desirable to checking stabilization
Property effect of the enhancing construction in different laterally and axially load situation.For simulation dust collector box body different phase stress is different
Situation, the loading procedure of model is divided into two stages, and the first stage, to apply lateral load, acts on uniform area load on wallboard
Pw, corresponding to the trial operation stage and be initially powered up the stage, loading conditions are as shown in Figure 4.Second stage applies perpendicular in column capital
Destroyed to evenly load to Instability of pillar, corresponding axial bearing capacity is defined as P when column is destroyedc,cr.DefinitionFor column undertakes
The coefficient of stability of xial feed, i.e.,(Pcy=fy·AH, AHIt is H profile steel column sectional area, PcyIt is column total cross-section
Yield load).In all of the embodiments illustrated, column is calculated by changing the size of lateral load under different load situations
Stability.
Because wallboard is reliably continuously coupled with column, wallboard can share xial feed suffered by a part of column, by big
The statistical analysis of result of finite element is measured, the axial compressive force that general column top cross-section undertakes is that capital applies axial compressive force
80%~85%, remaining is transferred to wallboard by the link node of wallboard and column, therefore is reached when column top applies axial compressive force
To 1.2PcyWhen, most of region of column top cross-section reaches surrender.In view of the engineering design method invented, one is to answer
When consideration structure has certain safe clearance, two is to consider section still with the presence of shear stress, therefore when column top applies axially
Pressure reaches 1.2PcyWhen, it is considered as the total cross-section surrender of column top, bearing capacity reaches capacity, and is not further added by xial feed.
5th, initial imperfection is constructed：Because dust collector box body structure is inevitable during transport, installation, assemble welding etc.
Ground can produce initial imperfection.Born under laterally and axially load common state in casing column, column is for the larger area of compression
First half section (web and the preceding edge of a wing) the bending unstability in domain is most sensitive, and now its stability bearing capacity is minimum.Therefore in order to
Consider the adverse effect of initial imperfection, while inducing column there is unstability, it is initially curved in column high pressure stress regional structure section
Twisting strain, initial deformation amplitude is taken as the 1/1000 of pillar height.For the less situation of lateral load, the xial feed on column rises
Control action, general its axial compression stress area high is in the range of 0.15l (l is cross-brace spacing) below capital；When horizontal lotus
When carrying larger, in the range of 0.31l below capital, specific position becomes with the change of model for the maximum crushing stress position of model
Change.Centered on producing position by maximum crushing stress on column, thereon, in the range of lower each 0.04l to structural finite element model structure
Initial bending deformation is made, initial imperfection is formed.The general pressuring stress level on the altitude range inner column can reach 0.90 σmax
The above (σmaxIt is the maximum axial compression on column), and the external pressure stress decay of the scope is very fast.It is limited for each embodiment
The calculating of meta-model shows that it is more unfavorable for structural stability to construct initial imperfection within this range, can fully be examined
Consider the adverse effect of initial imperfection.After introducing initial imperfection in this manner, finally there is maximum buckling deformation in defect sturcture
Position just applying in the range of initial deformation, that is, show that axial compression stress region high on column becomes with initial bending is applied
It is consistent that shape region and defect sturcture finally occur unstability region.
6th, process is analyzed：To construct initial imperfection model (described in performance measurement of the present invention and all embodiment moulds
Type introduces initial imperfection, including is not provided with the model of stability enhancing construction and sets the model of stability enhancing construction), first
Apply lateral load on wallboard, simulated with the laterally uniform area load of 3000pa lateral load level it is smaller when structure receive
Power situation；Simulated with the laterally uniform area load of 9000pa lateral load level it is larger when structure force-bearing situation.Again vertical
Column top applies axial uniformly distributed load, until destroying, its extreme point is the stability bearing capacity of the model column.Carry out column steady
Determine to be also contemplated for geometrically-nonlinear effects during Analysis of Bearing Capacity, using arc-length methods tracking structure response path.
Following embodiments embody the influence of the change column stability bearing capacity of stability enhancing constructing variable.
Embodiment 1：
Dust collector box body wallboard thickness t is 7mm, and panel width w is 3500mm, and the steel angle stiffening rib distance s are 1170mm, often
One cross-brace (cross-brace spacing is l=3s) is set every three ribs spacing of putting more energy into, column overall height H is 11990mm, column
Section is H200mm × 150mm × 6mm × 9mm (section h × edge of a wing b wide highf× web thickness tw× edge of a wing thickness tf)。
When lateral load is smaller, deformed by the initial bending that column section is constructed in the range of 0-0.08l below capital；When
When lateral load is larger, initial bending deformation is constructed in the range of 0.24l-0.32l.It is 3000pa that column is calculated in lateral load
Bearing capacity during with 9000pa, the stability bearing capacity obtained before Column stability enhancing is as shown in table 1.
Embodiment 2：
Using the model parameter in embodiment 1, stability enhancing construction measure, strengthening steel slab and wall are taken in column simulation
The vertical attachment weld of plate away from after wallboard and column edge of a wing attachment weld apart from d be 0mm, strengthening steel slab thickness tsIt is wallboard thickness
1 times, it is first ribbed stiffener interval to reinforce interval.Obtain the enhanced stability bearing capacity of Column stability as shown in table 1.
Embodiment 3 and embodiment 4：
Strengthening steel slab is vertical with wallboard during embodiment 3 and embodiment 4 only change stability enhancing construction relative to embodiment 2
Attachment weld away from after wallboard and column edge of a wing attachment weld apart from d, specific configuration parameter and column stability bearing capacity compare as
Shown in table 1.
Embodiment 5, embodiment 6, embodiment 7 and embodiment 8：
Embodiment 5, embodiment 6, embodiment 7 and embodiment 8 add in only changing stability enhancing construction relative to embodiment 2
Gu steel plate thickness ts, specific configuration parameter and column stability bearing capacity are more as shown in table 1.
Embodiment 9：
Embodiment 9 only changes the connected mode of strengthening steel slab lower end and ribbed stiffener relative to embodiment 3, by embodiment 3
It is not connected to be changed to being welded to connect for embodiment 9, specific configuration parameter and column stability bearing capacity are more as shown in table 1.Contrast is real
The stability bearing capacity of example 3 and embodiment 9 is applied, after strengthening steel slab lower end and ribbed stiffener are by being not connected to be changed to be welded to connect, column
Stability bearing capacity is constant, considers the convenient of construction and is easy to cause after strengthening steel slab lower end is welded to connect with ribbed stiffener
Strengthening steel slab upper and lower ends are not connected with wallboard ribbed stiffener in welding damage and aggravation stress concentration, therefore the present invention, according to
Ribbed stiffener section form, appropriate cutting strengthening steel slab is allowed to avoid interfering with ribbed stiffener edge.
Table 1
Embodiment 10：
Moulded dimension is as follows：T is 7mm, and w is 4200mm, and s is 1040mm, and cross-brace spacing is l=5s, and column is always high
Degree H is 17060mm, and column section is H294 × 200 × 8 × 12.
When lateral load is smaller, initial bending deformation is constructed in the range of 0-0.08l below capital；When lateral load compared with
When big, initial bending deformation is constructed in the range of 0.27l-0.35l below capital.Calculate column lateral load be 3000pa and
Bearing capacity during 9000pa, the stability bearing capacity obtained before Column stability enhancing is as shown in table 2.
Embodiment 11：
Using the model parameter in embodiment 10, column simulation take stability strengthen construction measure, strengthening steel slab with
The vertical attachment weld of wallboard away from after wallboard and column edge of a wing attachment weld apart from d be 0mm, strengthening steel slab thickness tsFor wallboard is thick
1 times of degree, it is first and second ribbed stiffener interval to reinforce interval.Column stability is obtained after construction initial imperfection enhanced steady
Determine bearing capacity as shown in table 2.
Embodiment 12 and embodiment 13：
Embodiment 12 and embodiment 13 only change strengthening steel slab and wallboard in stability enhancing construction relative to embodiment 11
Vertical attachment weld after wallboard and column edge of a wing attachment weld apart from d, specific configuration parameter and column stability bearing capacity ratio
It is more as shown in table 2.
Embodiment 14, embodiment 15, embodiment 16 and embodiment 17：
Embodiment 14, embodiment 15, embodiment 16 and embodiment 17 only change stability enhancing structure relative to embodiment 11
Make middle strengthening steel slab thickness ts, specific configuration parameter and column stability bearing capacity are more as shown in table 2.
Table 2
Embodiment 18：
Moulded dimension is as follows：T is 7mm, and w is 4030mm, and s is 1200mm, and cross-brace spacing is l=6s, and column is always high
Degree H is 20540mm, and column section is H350 × 350 × 10 × 16.
When lateral load is smaller, initial bending deformation is constructed in the range of 0-0.08l below capital；When lateral load compared with
When big, initial bending deformation is constructed in the range of 0.12l-0.20l below capital.Calculate column lateral load be 3000pa and
Bearing capacity during 9000pa, the stability bearing capacity obtained before Column stability enhancing is as shown in table 3.
Embodiment 19：
Using the model parameter in embodiment 18, column simulation take stability strengthen construction measure, strengthening steel slab with
The vertical attachment weld of wallboard away from after wallboard and column edge of a wing attachment weld apart from d be 0mm, strengthening steel slab thickness tsFor wallboard is thick
1 times of degree, it is first, second and third ribbed stiffener interval to reinforce interval.It is enhanced Column stability to be obtained after construction initial imperfection
Stability bearing capacity is as shown in table 3.
Embodiment 20 and embodiment 21：
Embodiment 20 and embodiment 21 only change strengthening steel slab and wallboard in stability enhancing construction relative to embodiment 19
Vertical attachment weld after wallboard and column edge of a wing attachment weld apart from d, specific configuration parameter and column stability bearing capacity ratio
It is more as shown in table 3.
Embodiment 22, embodiment 23, embodiment 24 and embodiment 25：
Embodiment 22, embodiment 23, embodiment 24 and embodiment 25 only change stability enhancing structure relative to embodiment 19
Make middle strengthening steel slab thickness ts, specific configuration parameter and column stability bearing capacity are more as shown in table 3.
Table 3
By embodiment 2-8,11-17,19-25 take stability strengthen construction measure after column stability bearing capacity respectively with
Stability bearing capacity before the Column stability enhancing of embodiment 1,10,18 is contrasted, it can be deduced that column stabilization of the invention
Property enhancing construction measure opposition column stability have greatly raising.
Investigate comparing embodiment group 2,3,4 and embodiment group 11,12,13 and embodiment group 19,20,21, strengthening steel slab
With the influence relation apart from d column stability bearing capacities of the vertical attachment weld of wallboard edge of a wing attachment weld after wallboard and column
Respectively as shown in accompanying drawing 5 (a) -5 (c).Research finds that the edge of a wing after wallboard and column connects strengthening steel slab with wallboard welding position
When welding seam is more and more remote, stable bearing capacity can be reduced gradually after column is reinforced.Knowable to analysis, preceding edge of a wing meeting during Instability of pillar
Occur substantially to reverse, when strengthening steel slab is perpendicular to preceding flange plate part (d=0mm), the active force of strengthening steel slab is perpendicular to preceding
The edge of a wing, such effect of contraction is most direct.As d ＞ 0, as shown in Figure 6, strengthening steel slab is oblique to be connected to preceding flange plate, its
Directed force F only has vertical stress component FvPreceding edge of a wing torsional deflection can be limited, such effect of contraction is weakened；And its horizontal component
FhThe moment of torsion to the preceding edge of a wing and web can be caused, aggravate section torsional deflection.Therefore when strengthening steel slab is connected perpendicular to the preceding edge of a wing
When (d=0mm), the deformation of the preceding edge of a wing is restricted most strong, and Column stability is best.Due to as d=0mm, the vertical weld seam of twice
Overlap, it is easy to cause problems of welded quality, while making welding region steel become fragile, aggravate stress concentration, this is needed in constructing
To be avoided.In addition, it is contemplated that during d=100mm, bearing capacity when column stability bearing capacity is with d=0mm situations is equal or omits
Edge down low, thus taken in the present invention strengthening steel slab and the vertical attachment weld of wallboard after wallboard and column edge of a wing attachment weld away from
From being 100mm.
Investigate comparing embodiment group 1,5,6,3,7,8 and embodiment group 10,14,15,12,16,17 and embodiment group 18,
22nd, 23,20,24,25, the influence relation of strengthening steel slab thickness column stability bearing capacity respectively as shown in accompanying drawing 7 (a) -7 (c),
It is display directly perceived, the strengthening steel slab thickness in accompanying drawing employs absolute value, it is numerically identical with the relative value that uses in subordinate list.
Result of calculation shows that reinforcing plate thickness column stability bearing capacity influences smaller, when strengthening steel slab thickness and wallboard are with thickness, no
Maximum is all basically reached with the stability bearing capacity of physical dimension architecture neutral post.In order to improve stability enhancing effect, and protect
The local stability of strengthening steel slab is demonstrate,proved, therefore value in the present invention to strengthening steel slab thickness is equal to casing wallboard wall thickness.
It should be noted that due to the presence of initial imperfection, strengthening steel slab is not straight plate has bright in the loading later stage
Aobvious local buckling occurs, but after local buckling occurs, column bearing capacity can continue substantially increase, show can using plus
Gu the Post-Bucking Strength of steel plate.Therefore, there is no need to limit strengthening steel slab flakiness ratio according to the requirement on the bending component edge of a wing.
In sum：In the stability enhancing building method of column, when strengthening steel slab thickness is equal to casing wallboard wall
Thickness, when strengthening steel slab is 100mm with the distance of the vertical attachment weld of wallboard edge of a wing attachment weld after wallboard and column, reinforces structure
Processing and fabricating facility is made, steel are saved, and Column stability enhancing effect is notable.
Embodiment 26：
Moulded dimension is as follows：T is 7mm, and w is 4200mm, and s is 1040mm, and cross-brace spacing is l=2s, and column is always high
Degree H is 17060mm, and column section is H294 × 200 × 8 × 12.
When lateral load is smaller, initial bending deformation is constructed in the range of 0-0.08l below capital；When lateral load compared with
When big, initial bending deformation is constructed in the range of 0.21l-0.29l below capital.Calculate column lateral load be 3000pa and
Bearing capacity during 9000pa, the stability bearing capacity obtained before Column stability enhancing is as shown in table 4.
Embodiment 27：
Using the model parameter in embodiment 26, stability enhancing construction measure is taken in column simulation, and strengthening steel slab is thick
Degree is equal to casing wallboard wall thickness, strengthening steel slab and the vertical attachment weld of wallboard after wallboard and column edge of a wing attachment weld away from
From being 100mm, it is first ribbed stiffener interval to reinforce interval.The enhanced stabilization of Column stability is obtained after construction initial imperfection
Bearing capacity is as shown in table 4.
Table 4
Comparative example 26 and 27, can obtain, when cross-brace spacing is interval two ribbed stiffeners, only reinforcing first
Individual ribbed stiffener is interval can to make the stability bearing capacity of column reach capacity.Due to the high pressure stress region on column and final generation
Unstability region is consistent, in first ribbed stiffener is interval, therefore when cross-brace spacing is interval two ribbed stiffeners, it is only necessary to
Reinforce first ribbed stiffener interval.
Embodiment 28：
Embodiment 28 only changes strengthening steel slab arrangement interval relative to embodiment 3 (cross-brace spacing is l=3s), by
First ribbed stiffener interval is changed into first and second ribbed stiffener interval, obtains the enhanced stability bearing capacity of Column stability, such as table
Shown in 5.
Table 5
Embodiment 29：
Moulded dimension is as follows：T is 7mm, and w is 3500mm, and s is 1170mm, and cross-brace spacing is l=3s, and column is always high
Degree H is 11990mm, and column section is H200 × 150 × 6 × 9.
When lateral load is smaller, initial bending deformation is constructed in the range of 0-0.08l below capital；When lateral load compared with
When big, column axle compression region high is in first ribbed stiffener interval bottom and second interval top of ribbed stiffener, that is, cross over
Two ribbed stiffener intervals.Deform due to thering is diaphragm plate to limit column in ribbed stiffener position, it is impossible to form vertical in ribbed stiffener position
The maximum twist deformation of column section, and consider that initial imperfection has certain randomness, therefore a 0.36l- below capital
Initial bending deformation is constructed in the range of 0.44l, i.e., in second ribbed stiffener interval structure initial imperfection.Column is calculated in horizontal lotus
Bearing capacity during for 3000pa and 9000pa is carried, the stability bearing capacity obtained before Column stability enhancing is as shown in table 6.
Embodiment 30：
Using the model parameter in embodiment 29, stability enhancing construction measure strengthening steel slab thickness is taken in column simulation
It is equal to casing wallboard wall thickness, the distance of strengthening steel slab and the vertical attachment weld of the wallboard edge of a wing attachment weld after wallboard and column
It is 100mm, it is first ribbed stiffener interval to reinforce interval.Obtain the enhanced stability bearing capacity of Column stability as shown in table 6.
Embodiment 31：
It is interval that embodiment 31 only changes strengthening steel slab arrangement relative to embodiment 30, and the is changed into from first ribbed stiffener interval
First, two ribbed stiffener intervals, obtain the enhanced stability bearing capacity of Column stability, as shown in table 6.
Table 6
When cross-brace spacing is interval three ribbed stiffeners, high pressure stress region and final instability area on column
Domain is likely located at first ribbed stiffener interval bottom and second interval top of ribbed stiffener, i.e., across two ribbed stiffener intervals.
When Instability of pillar occurs first ribbed stiffener interval bottom in the case of not taking stability to strengthen construction measure, contrast is implemented
Example 3 and 28, can obtain lateral load it is larger in the case of, reinforce that first and second two ribbed stiffeners are interval more only to reinforce first
The stability bearing capacity of ribbed stiffener interval column has 11% lifting.The Instability of pillar in the case of not taking stability to strengthen construction measure
Occur when at the top of second ribbed stiffener interval, comparative example 29,30 and 31, when lateral load is larger, reinforces two and add
Bearing capacity when strength rib is interval improves 35% when more only reinforcing first ribbed stiffener interval, and can reach the bearing capacity limit.
The high pressure stress region and unstability region for strengthening construction measure situation lower pillar stand due to not taking stability do not occur at the 3rd
Individual ribbed stiffener is interval, therefore, the 3rd ribbed stiffener is interval without reinforcing.In sum, relatively conservatively, when cross-brace spacing
During for three ribbed stiffeners intervals, first and second two ribbed stiffener intervals should be reinforced.
When cross-brace spacing is interval five ribbed stiffeners, comparative example 10 and 12, obtain now only reinforcing two
Ribbed stiffener is interval can to make the stability bearing capacity of column reach maximum.When cross-brace spacing is four or five ribbed stiffener intervals
When, typically occur in capital when the high pressure stress region and unstability region of stability enhancing construction measure situation lower pillar stand is not taken
In following two ribbed stiffeners are interval, therefore, when cross-brace spacing is set in the present invention as three to five ribbed stiffeners intervals, it is only necessary to
Stability enhancement measures are taken in first and second two ribbed stiffener interval ranges.
Embodiment 32：
Embodiment 32 only changes strengthening steel slab arrangement interval relative to embodiment 20 (l=6s), is added by first, second and third
Strength rib interval is changed into first and second ribbed stiffener interval, obtains the enhanced stability bearing capacity of Column stability, as shown in table 7.
Embodiment 33：
Embodiment 33 only changes strengthening steel slab arrangement interval relative to embodiment 20 (l=6s), is added by first, second and third
Strength rib interval is changed into first, second, third and fourth ribbed stiffener interval, obtains the enhanced stability bearing capacity of Column stability, such as table 7
It is shown.
Table 7
Embodiment 34：
Moulded dimension is as follows：T is 7mm, and w is 4200mm, and s is 1040mm, and cross-brace spacing is l=6s, and column is always high
Degree H is 17060mm, and column section is H294 × 200 × 8 × 12.
When lateral load is smaller, initial bending deformation is constructed in the range of 0-0.08l below capital；Work as lateral load
When larger, initial bending deformation is constructed in the range of 0.27l-0.35l below capital.It is 3000pa that column is calculated in lateral load
Bearing capacity during with 9000pa, the stability bearing capacity obtained before Column stability enhancing is as shown in table 8.
Embodiment 35：
Using the model parameter in embodiment 34, stability enhancing construction measure is taken in column simulation, and strengthening steel slab is thick
Degree is equal to casing wallboard wall thickness, strengthening steel slab and the vertical attachment weld of wallboard after wallboard and column edge of a wing attachment weld away from
From being 100mm, it is first and second ribbed stiffener interval to reinforce interval.Obtain the enhanced stability bearing capacity of Column stability such as table 8
It is shown.
Embodiment 36：
Embodiment 36 only changes strengthening steel slab arrangement interval relative to embodiment 35, is become by first and second ribbed stiffener is interval
It is first, second and third ribbed stiffener interval, obtains the enhanced stability bearing capacity of Column stability, as shown in table 8.
Table 8
Comparative example's group 32,20 and 33, when cross-brace spacing is interval six ribbed stiffeners, lateral load is larger
In the case of, totally three interval stabilizations for relatively reinforcing first and second two ribbed stiffeners interval columns of ribbed stiffener are held for reinforcing first, second and third
Carry power and improve 6.5%, when reinforcing first, second, third and fourth totally four ribbed stiffeners being interval, column stability bearing capacity relatively reinforces the
First, two, three totally three ribbed stiffener intervals it is basically identical, column hold stabilization carry power do not lifted；Comparative example's group 35 and 36, can be with
Obtain when cross-brace spacing is interval six ribbed stiffeners, in the case that lateral load is larger, reinforce first, second and third totally three
The interval stability bearing capacity for relatively reinforcing first and second two ribbed stiffeners interval columns of individual ribbed stiffener improves 50%, and reinforce first,
2nd, column stability bearing capacity can be reached the limit values when three ribbed stiffeners are interval.Therefore put more energy into for six in cross-brace spacing
When rib is interval, it is necessary to which the column in first, second and third totally three ribbed stiffener interval ranges is reinforced.
In sum：When column cross-brace is smaller than three ribbed stiffeners intervals, strengthening steel slab is only at top first
The interval arrangement of individual ribbed stiffener；When cross-brace spacing more than or equal to three and it is interval less than six ribbed stiffeners when, strengthening steel slab exists
The interval arrangement of first and second two, top ribbed stiffener；When cross-brace spacing is interval more than or equal to six ribbed stiffeners, strengthening steel slab
At top first, second and third, totally three ribbed stiffener intervals are arranged.
Although the present invention is disclosed as above with preferred embodiment, it is not limited to the present invention, any to be familiar with this skill
The people of art, without departing from the spirit and scope of the present invention, can do various changes with modification, therefore protection model of the invention
Enclose being defined of being defined by claims.
Claims (9)
1. a kind of dust collector box body H-shaped section Column stability enhancing construction, it is characterised in that the dust collector box body wallboard is
Flat plate with ribbed stiffener, one piece of strengthening steel slab is each side welded in neighbouring intercostal region of putting more energy into, column web,
The vertical edge of the strengthening steel slab one is welded to connect with the preceding edge of a wing of column, and another vertical edge is welded to connect with dust collector box body wallboard.
2. a kind of dust collector box body H-shaped section Column stability enhancing according to claim 1 is constructed, it is characterised in that
For edge column, only the stability enhancing construction is arranged in column web side.
3. a kind of dust collector box body H-shaped section Column stability enhancing according to claim 1 and 2 is constructed, and its feature exists
In the strengthening steel slab thickness is equal to casing wallboard wall thickness.
4. a kind of dust collector box body H-shaped section Column stability enhancing according to claim 1 or 3 is constructed, and its feature exists
In, the strengthening steel slab and the vertical attachment weld of wallboard, the distance of edge of a wing attachment weld is 100mm after wallboard and column.
5. construction is strengthened according to a kind of any described dust collector box body H-shaped section Column stability of Claims 1 to 4, it is special
Levy and be, the strengthening steel slab is along stem height direction arrangement interval：When column cross-brace is smaller than three ribbed stiffeners
When interval, strengthening steel slab is only in the interval arrangement of first, top ribbed stiffener；When cross-brace spacing is more than or equal to three and is less than
When six ribbed stiffeners are interval, strengthening steel slab is in the interval arrangement of first and second two, top ribbed stiffener；When cross-brace spacing more than etc.
When six ribbed stiffeners are interval, strengthening steel slab at top first, second and third, arrange by totally three ribbed stiffener intervals.
6. construction is strengthened according to a kind of any described dust collector box body H-shaped section Column stability of Claims 1 to 5, it is special
Levy and be, the strengthening steel slab upper and lower ends are not connected with wallboard ribbed stiffener, according to ribbed stiffener section form, steel is reinforced in cutting
Plate is allowed to avoid interfering with ribbed stiffener edge.
7. the method that a kind of any dust collector box body H-shaped section Column stability enhancing of application claim 1~6 is constructed,
Characterized in that, the strengthening steel slab is along stem height direction arrangement interval：Add when column cross-brace is smaller than three
When strength rib is interval, strengthening steel slab is only in the interval arrangement of first, top ribbed stiffener；When cross-brace spacing more than or equal to three and
When interval less than six ribbed stiffeners, strengthening steel slab is in the interval arrangement of first and second two, top ribbed stiffener；When cross-brace spacing is big
When interval equal to six ribbed stiffeners, strengthening steel slab at top first, second and third, arrange by totally three ribbed stiffener intervals；The reinforcing
Steel plate thickness is equal to casing wallboard wall thickness；The strengthening steel slab is connected away from wallboard with the vertical attachment weld of wallboard with the edge of a wing after column
The distance of weld seam is 100mm；The strengthening steel slab upper and lower ends are not connected with wallboard ribbed stiffener, according to ribbed stiffener section shape
Formula, cutting strengthening steel slab is allowed to avoid interfering with ribbed stiffener edge.
8. method according to claim 7, it is characterised in that for strengthening the H-shaped section being connected with the wallboard with ribbed stiffener
The stability of column, wherein H-shaped section column are constrained by cross-brace, and wallboard bears the lateral load perpendicular to wallboard plane,
Bear xial feed in column top.
9. method according to claim 8, it is characterised in that the stability for strengthening dust collector box body supporting upright post.
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| CN108073773A (en) * | 2017-12-29 | 2018-05-25 | 江南大学 | A kind of method of the double limb combined section columns Axial Compression Stability bearing capacities of definite dust collector box body |
| CN108374513A (en) * | 2018-03-26 | 2018-08-07 | 北京筑福建筑事务有限责任公司 | A kind of additional elevator platform uses the tiling steel plate structure and its construction method of H-type rib |
| CN109241629A (en) * | 2018-09-10 | 2019-01-18 | 江南大学 | A kind of method of determining dust collector box body column Axial Compression Stability bearing capacity |
| CN109711074A (en) * | 2018-12-29 | 2019-05-03 | 江南大学 | The design method of middle standing pillar in dust collector box body wallboard-rectangular tube pillar construction |
| CN110457836A (en) * | 2019-08-15 | 2019-11-15 | 江南大学 | Dust collector box body wallboard-pillar construction system middle standing pillar design method |
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| CN109711074A (en) * | 2018-12-29 | 2019-05-03 | 江南大学 | The design method of middle standing pillar in dust collector box body wallboard-rectangular tube pillar construction |
| CN110633495A (en) * | 2019-08-08 | 2019-12-31 | 张家港市锦明机械有限公司 | Design method of high-temperature electric dust remover structure |
| CN110457836A (en) * | 2019-08-15 | 2019-11-15 | 江南大学 | Dust collector box body wallboard-pillar construction system middle standing pillar design method |
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