CN108951859A - Using the construction steel structure composite node of CrNiMn high alloy wlding and cast welding construction - Google Patents
Using the construction steel structure composite node of CrNiMn high alloy wlding and cast welding construction Download PDFInfo
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- CN108951859A CN108951859A CN201810964165.9A CN201810964165A CN108951859A CN 108951859 A CN108951859 A CN 108951859A CN 201810964165 A CN201810964165 A CN 201810964165A CN 108951859 A CN108951859 A CN 108951859A
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- steel
- construction
- cast
- main structure
- welding
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
Using the construction steel structure composite node of CrNiMn high alloy wlding and cast welding construction.The weldability that the present invention solves between the steel member of two kinds of unlike materials of cast steel and hot-rolled steel is undesirable, and there are be also easy to produce quality of weld joint potential problem when the complicated construction technique of different steel weld and in-site installation welding procedure.The setting equal with the quantity of main structure body extended element of cast steel body member connector, the free end of cast steel body member connector is welded as a whole with corresponding main structure body extended element, the setting identical as corresponding main structure body extended element cross section outer profile size of the free end of cast steel body member connector, the setting identical as the material of structural body components of main structure body extended element.Different steel weld in the construction of live Steel Structure Installation between cast steel node body member and structural body components is connected process by the present invention, is converted to the material-structure steel member butt welding of the same race between structural body components and main structure body extended element.
Description
Technical field
The present invention relates to a kind of construction steel structure cast steel nodes, and in particular to using CrNiMn high alloy wlding and cast welding structure
The construction steel structure composite node made, belongs to construction steel structure technical field.
Background technique
Steel construction has many advantages, such as that intensity height, good toughness, anti-seismic performance is good, speed of application is fast, is very suitable to modern project
The demand that structure develops to towering, large span and heavy duty, engineer application are increasing.In the development process of space structure, steel
" connecting node " application of structure is increasingly wide in range.The raising of foundry engieering therewith, cast steel node therein also increasingly obtain in China
To being widely applied.Cast steel node is generally formed by integral cast, and joint form is flexible, and working performance is safe and reliable.Relative to
Traditional welding node form (such as: welded K-joint of steel tubular), cast steel node avoid a plurality of weld seam of welding node in node
Place collects, while weld seam may be arranged at the stress that weld seam is reduced from joint cores remote position, thus improves and finish
The stress performance of structure.
Meanwhile the connection method and its technology of cast steel node body member and structural body components, also it is inevitable by
Concern.The method that the cast steel node of steel construction is connected with main component connects with welding most commonly seen.Usual steel construction shows
In the installation of field, the craft port feature of cast steel node ontology and main component, predominantly circle, rectangle or polymorphic structure
Etc. geometries, i.e., nothing more than it is practical be all the welding points form such as " pipe docking " or " plate docking ".The cast steel node of steel construction
The welding structures such as material common G20Mn5, ZG275-485H cast steel series.Relatively higher (the main calculating elements carbon of its carbon equivalent
Content 0.17-0.25%), supply of material state is at casting+heat.The main component material of steel construction often use Q345, Q390, Q420,
The low-alloy structural steel such as Q460 series, carbon equivalent is relatively low (main calculating elements carbon content is generally≤0.20%), the supply of material
State is rolling or rolling+heat treatment, therefore two kinds of material microstructure differences, grain size is different, and weldability is also different, casting
It makes steel weldability and compares poor, rolled steel weldability compares preferably.
In welding construction between the cast steel node and main component of steel construction, due to cast steel and rolled steel two
The steel member of kind material, carbon equivalent and its metal microstructure therebetween differ greatly, and mutual weldability is also not enough managed
Think, the construction technology as " different steel weld " is relative complex, and is easy to generate the hidden danger of quality of welding point.Especially existing
Under conditions of the erecting and welding construction of field, the group of the dissimilar material of construction steel structure cast steel node body member and structural body components
To welding, the technical indicators such as integral strength, rigidity, toughness plasticity and the fatigue behaviour of banjo fixing butt jointing, be more vulnerable to welding material,
The limitation and influence of the factors such as welding position, site environment and heat treatment, final result not only exacerbate welding
Difficulty of construction also improves the composite technology cost of its construction.
To sum up, the composite technology technology water of cast steel node body member and the different steel weld of structural body components group pair
It is flat, and how to guarantee " dissimilar steel " property of welded joint of high-quality, actually having become, which influences space structure, grows rapidly
One of technical bottleneck.
Summary of the invention
The present invention is that the weldability between the steel member of solution two kinds of materials of cast steel and hot-rolled steel is not ideal enough, and there are different
It is easy to lead to the problem of quality of weld joint hidden danger when the complicated construction technique of kind steel welding and in-site installation welding procedure, into
And provide a kind of construction steel structure composite node using CrNiMn high alloy wlding and cast welding construction.
The technical solution adopted by the present invention to solve the above technical problem is:
The construction steel structure composite node of cast welding construction of the invention includes multiple cast steel body member connector 1-1 and multiple
Main structure body extended element 1-2, cast steel body member connector 1-1 setting equal with the quantity of main structure body extended element 1-2, often
The free end of a cast steel body member connector 1-1 is welded as a whole with corresponding main structure body extended element 1-2, each cast steel sheet
The setting identical as the cross section outer profile size of corresponding main structure body extended element 1-2 of the free end of body component connector 1-1, knot
Structure main body extended element 1-2 setting identical as the material of corresponding structural body components.
Further, the length range L of main structure body extended element 1-2 is 250~500mm.
Further, the free end of each cast steel body member connector 1-1 is provided with welding groove.
Further, main structure body extended element 1-2 is round steel pipe component, rectangular steel pipe component, cross section are H-shaped structure
Part, cross section are I-shaped component or end plate connection component.
Further, the construction steel structure composite node further includes connector liner 2-2, cast steel body member connector 1-1
Connector liner 2-2 is embedded with the junction of main structure body extended element 1-2.
Compared with the prior art, the invention has the following beneficial effects:
The construction steel structure composite node of cast welding construction of the invention is by the structure with structural body components same material
Main body extended element is welded in advance on cast steel body member, i.e., manufactures the process digestion of " different steel weld " in cast steel node
The batch production condition stage, can be conducive to improve Dissimilar Steel Welded Joint reliability；
Former general structural steel wlding is optimized for the special welding wire of CrNiMn high alloy wlding by the present invention, and existing
Welding procedure material is compared, and welding deposited metal has more excellent intensity, plasticity and toughness deposit, can support steel knot
Structure stress criter ia has under the more preferably precondition of bearing capacity, make welding point have excellent comprehensive mechanical property and
Welded integral rigidity and its stability advantageously ensure that the long service performance of construction steel structure, especially ensure that
Antifatigue damage capability under the conditions of the dynamic loads such as bridge structure；
The present invention will be in original live Steel Structure Installation construction between cast steel node body member and structural body components
Different steel weld connect process, be converted to the material-structure steel of the same race between main structure body extended element and structural body components
The butt welding of component；
The present invention had not only facilitated construction steel structure in-site installation and had reduced construction cost, but also reduced xenogenesis to the maximum extent
The hidden danger of quality of steel welded joint, it is safer, high-quality and efficient；The sexual valence of cast steel node product itself is also improved simultaneously
Than.
Detailed description of the invention
Fig. 1 is the construction steel structure composite node schematic diagram of cast welding construction of the present invention (before welding)；
Fig. 2 is the construction steel structure composite node schematic diagram of cast welding construction of the present invention (after welding)；
Fig. 3 is that cast steel member ontology 1-1 and main body extended element 1-2 butt welding are cutd open in the specific embodiment of the invention four
Face schematic diagram (one of case).
Specific embodiment
Specific embodiment 1: as shown in Figures 1 to 3, the construction steel structure composite node of the cast welding construction of present embodiment
Including multiple cast steel body member connector 1-1 and multiple main structure body extended element 1-2, cast steel body member connector 1-1 and knot
The equal setting of quantity of structure main body extended element 1-2, the free end of each cast steel body member connector 1-1 and corresponding structure master
Body extended element 1-2 docking is welding as one, and allows the free end of each cast steel body member connector 1-1 and corresponding main structure body
Extended element 1-2 not uniform thickness, but usually require that the free end of each cast steel body member connector 1-1 is prolonged with corresponding main structure body
Stretch the identical setting of cross section outer profile size of component 1-2 banjo fixing butt jointing, main structure body extended element 1-2 and corresponding structure
Material, the geometry setting identical as size of main component.
In order to simplify the technique of welding procedure, the free end of each cast steel body member connector 1-1 and corresponding structure master
The cross-sectional shape of body extended element 1-2 is identical, and same or similar setting is arranged in outer profile size；Panel thickness is identical or phase
Nearly setting.
In the past according to the technical conditions of steel-casting and structural member material, the common welding material traditionally matched is common
The low-alloy structural steel welding material such as E5015 craft welding rod or ER50-6 welding wire for gas shielded welding, with meet cast steel node with
The weld strength requirement of " equal strength design " of structural member (such as pipe fitting) group pair；Due to cast steel base material different from two kinds of rolled steel
The steel member of material, carbon equivalent and its metal microstructure therebetween differ greatly, and solderability is also not ideal enough, according to " xenogenesis
The corresponding welding heat treatment process of steel welding " and measure requirement, it is necessary to give and guarantee, to avoid there is weld crack, to obtain
Obtain preferable joint mechanical property.
Different steel weld between the present invention cast steel body member connector 1-1 selected and main structure body extended element 1-2
Material is optimized for being more suitable for the austenite of CrNiMn master alloying system of the different steel weld between cast steel and rolled steel not
Become rusty steel special welding wire, the trade mark of special welding wire are as follows: H08Cr20Ni10Mn7Si-ZG, to be preferably replaced in former common knot
Structure steel welding material (i.e. ER50-6 in GB/T8110).The two compares, and special welding wire welds deposited metal with more excellent
Good intensity, plasticity and toughness deposit: the mechanical property for welding deposited metal is tensile strength Rm >=600N/mm2, elongation of having no progeny
Rate A >=30%, average impact absorbs energy and reaches 90J or so under the conditions of -40 DEG C, can support steel construction stress criter ia
Have under the more preferably precondition of bearing capacity, welding point is made to have excellent comprehensive mechanical property and welded entirety rigid
Property and its stability, advantageously ensure that long service performance (the in particular, for example live loads carrier strip such as bridge structure of construction steel structure
Antifatigue damage capability under part).The welding material is as a kind of chromium nickel manganese high alloy, and room temperature undertissue is based on austenite；
And by the synergy of nickel-manganese, there are significantly more molten hydrogen and molten carbon ability, weld metal can be significantly reduced
And its crack sensitivity of fusion area.Under proper condition, it does not need to carry out weld preheating and post weld heat treatment, it will further letter
Welding procedure technical process is changed.
The present invention uses the construction steel structure composite node of CrNiMn high alloy wlding and cast welding technical construction, is for casting
Connection between steel member ontology 1-1 and main structure body extended element 1-2, by relative complex xenogenesis steel member butt welding work
Sequence is completed in factory's stage, and uses the wlding welding of CrNiMn high alloy, to guarantee " dissimilar steel " welding point of high-quality
Every mechanical property.
Specific embodiment 2: as shown in Figures 1 to 3, the length range L of present embodiment main structure body extended element 1-2
It is set as 250~500mm.Be designed in this way, on the same rod piece to meet steel construction adjacent butt weld minimum spacing answer >=
The welding conditions requirement of 200mm.Other compositions and connection relationship are same as the specific embodiment one.
Specific embodiment 3: as shown in Figure 1, the free end of each cast steel body member connector 1-1 of present embodiment is set
It is equipped with welding groove.It is designed in this way, facilitates welding and guarantees weld seam 2-1 mass.Other compositions and connection relationship and specific implementation
Mode one or two is identical.
Specific embodiment 4: as depicted in figs. 1 and 2, present embodiment main structure body extended element 1-2 is round steel pipe
Component, rectangular steel pipe component, cross section are H-shaped component, cross section is I-shaped component or end plate connection component.It is designed in this way,
With being welded on site with corresponding steel construction main member.Various main structure body extended element 1-2 can be round steel pipe
Component, rectangular steel pipe component or other deformed steel members, are one of the embodiment of the present invention.Other compositions and connection are closed
System is the same as the specific implementation mode 3.
Specific embodiment 5: as shown in figure 3, construction steel structure composite node described in present embodiment can also include connecing
The junction of head liner 2-2, cast steel body member connector 1-1 and main structure body extended element 1-2 are embedded with connector liner 2-2.
It is designed in this way, in order to facilitate welding and guarantees weld seam 2-1 mass, welding with backing can be used.Other compositions and connection relationship and tool
Body embodiment one, 2 is four identical.
The above content is explanation made for the present invention, and it cannot be said that implementation of the invention is only limitted to this, this is not being departed from
Under the premise of inventive concept, several simple deduction or replace can also be made, all includes " pipe docking " or " plate docking "
Specific welding point form all shall be regarded as belonging to the scope of patent protection that claims that the present invention is submitted determine.
Claims (5)
1. a kind of construction steel structure composite node using CrNiMn high alloy wlding and cast welding construction, it is characterised in that: described
Construction steel structure composite node includes multiple cast steel body member connectors (1-1) and multiple main structure body extended elements (1-2), casting
Steel body member connector (1-1) setting equal with the quantity of main structure body extended element (1-2), each cast steel body member connector
The free end of (1-1) is welded as a whole with corresponding main structure body extended element (1-2), each cast steel body member connector (1-
1) setting identical as the cross section outer profile size of corresponding main structure body extended element (1-2) of free end, main structure body prolong
Stretch component (1-2) setting identical as the material of corresponding structural body components.
2. the construction steel structure composite node of cast welding construction according to claim 1, it is characterised in that: main structure body extends
The length range (L) of component (1-2) is 250~500mm.
3. the construction steel structure composite node of cast welding construction according to claim 1 or 2, it is characterised in that: each cast steel
The free end of body member connector (1-1) is provided with welding groove.
4. according to the construction steel structure composite node for the cast welding construction that claim 3 is stated, it is characterised in that: main structure body extends structure
Part (1-2) is round steel pipe component, rectangular steel pipe component, cross section are H-shaped component, cross section is that I-shaped component or end plate connect
Connection member.
5. the construction steel structure composite node of cast welding construction according to claim 1,2 or 4, it is characterised in that: described to build
Building steel construction composite node further includes connector liner (2-2), cast steel body member connector (1-1) and main structure body extended element
The junction of (1-2) is embedded with connector liner (2-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810964165.9A CN108951859B (en) | 2018-08-23 | 2018-08-23 | Building steel structure composite node adopting CrNiMn high-alloy welding material and cast-weld structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810964165.9A CN108951859B (en) | 2018-08-23 | 2018-08-23 | Building steel structure composite node adopting CrNiMn high-alloy welding material and cast-weld structure |
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| Publication Number | Publication Date |
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| CN108951859A true CN108951859A (en) | 2018-12-07 |
| CN108951859B CN108951859B (en) | 2020-08-11 |
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| CN201810964165.9A Active CN108951859B (en) | 2018-08-23 | 2018-08-23 | Building steel structure composite node adopting CrNiMn high-alloy welding material and cast-weld structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996458A (en) * | 2020-08-28 | 2020-11-27 | 北京市建筑设计研究院有限公司 | New application of G10MnMoV6-3 cast steel material and building cast steel node |
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| JPH0853881A (en) * | 1994-08-11 | 1996-02-27 | Tomoe Corp | Joint structure of steel pipe truss |
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| CN111996458A (en) * | 2020-08-28 | 2020-11-27 | 北京市建筑设计研究院有限公司 | New application of G10MnMoV6-3 cast steel material and building cast steel node |
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| CN108951859B (en) | 2020-08-11 |
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