CN108661174B - Discontinuous section column conversion node and construction method thereof - Google Patents
Discontinuous section column conversion node and construction method thereof Download PDFInfo
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- CN108661174B CN108661174B CN201810843711.3A CN201810843711A CN108661174B CN 108661174 B CN108661174 B CN 108661174B CN 201810843711 A CN201810843711 A CN 201810843711A CN 108661174 B CN108661174 B CN 108661174B
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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
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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
- E04B2001/246—Post to post connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a discontinuous section column conversion node and a construction method, comprising the following steps: the node main body is of a column structure with a hollow inside; the cross steel rib column is connected in the column structure of the node main body, and the outer edge of the cross steel rib column is connected with the inner wall of the column structure; the upper end circular section column transition plate is connected to the upper end of the node main body; the upper end circular section column is connected above the upper end circular section column transition plate; a stiffening rib plate I is connected between the upper end circular section column and the upper end circular section column transition plate; the lower end direction section column transition plate is connected to the lower end of the node main body; a lower end-shaped section column connected below the lower end-shaped section column transition plate; and a stiffening rib plate II is connected between the lower end side section column and the lower end side section column transition plate. The invention has good section transitional property, and avoids the phenomenon of stress concentration and the generation of anti-seismic weak parts which are only caused by the excessive discontinuous node steel column of the single-layer steel plate.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a key construction technology of a large discontinuous section column conversion node.
Background
In the construction process of modern engineering projects, the steel structure is mainly produced by a factory manufacturing method, so that the engineering construction period is shortened, the engineering construction cost is reduced, and the economic benefit of the whole engineering project is remarkably improved. However, the requirements on the design of steel structure joints in modern building engineering construction are also higher and higher, and especially the construction quality of the connecting joints of members such as beam column joints, special-shaped section columns, discontinuous section columns and the like is important. Therefore, the node connection modes need to be improved and innovated and applied to construction, so that the stability and reliability of the whole building structure are effectively improved.
The steel structure system has the comprehensive advantages of light dead weight, easy installation, short construction period, good earthquake resistance, quick investment recovery, less environmental pollution and the like, and has the obvious advantages of high strength, large span, light weight and the like compared with the reinforced concrete structure. In recent years, the situation of mainly concrete and masonry structures has been changed for a long time due to the price of raw materials, environmental protection and the like, and steel structures have been attracting attention in the industry due to their own superiority and have been widely used in engineering. The space steel structure is widely focused because the three-dimensional geometric structure can form reasonable stress form and fully plays the material performance, various forms of space steel structures such as grid structures, net shell structures, pipe truss structures and the like are continuously emerging, and the combined structure of the space steel structure and the net shell structure is more various in style.
The space steel structure net frame or net shell is a statically indeterminate structure formed by a plurality of rods regularly from several directions, and the key point is that the space structure can be greatly popularized, and the space steel structure net frame or net shell is characterized by simple structure, clear stress, convenient installation and low cost, and is easy to popularize in the space structure.
Since the space grid structure is applied to engineering, nearly hundred node forms exist, but along with the development of material technology, computing technology and connection technology, only 10 node forms can be widely applied to engineering. The welded hollow ball node and the bolt ball node adopted at present are two very mature nodes, so that the welded hollow ball node and the bolt ball node are widely applied to space steel structures, and the welded hollow ball node and the bolt ball node are plate nodes and directly intersected nodes, so that the rapid development of the space structures is brought.
Long-term practice proves that in the construction process of the steel structure node, the temperature deformation coefficient of the construction material is greatly different from that of the construction material in the concrete engineering, and when the external temperature changes, the deformation of the two materials is inconsistent, so that the node position generates larger compressive stress and tensile stress, and the construction quality of the whole engineering is seriously influenced.
Generally, the temperature deformation coefficient of the material changes with the shape and size of the construction material when the node of the frame structure is constructed, that is, if the size of the construction material at the node is continuously increased under the condition that the shape of the construction material is constant, the temperature deformation coefficient of the material is also increased, and the construction quality at the node is also seriously affected.
The safety of the large span space structure support column nodes is of paramount importance. Once a node fails, the connecting rod piece loses part or all of the bearing function, so that the structural system is locally damaged or even the whole system is continuously damaged. In recent years, the complexity of structural member nodes has increased greatly, and the node forms have been complex. The nodes are the most stressed parts in the structure, and are extremely important for the safety of the whole structure.
Because of the diversity and complexity of the space structure nodes, the design method cannot be covered in the existing structural design specifications, the geometric configuration of the nodes is reasonably determined, detailed mechanical analysis is carried out, model test research is needed if necessary, and the method is a key for ensuring structural safety, improving material utilization rate and effectively reducing steel consumption. Taking Kunming station engineering as an example, because the support columns are positioned on a strong earthquake zone, the earthquake-proof fortification intensity is 9 degrees, and meanwhile, in order to ensure the full utilization of the material property, the cross section of the support columns is changed along with the increase of floors to form discontinuous cross section columns, and the support capacity and the stability of the special section columns need to be reliably converted and designed at the nodes, so that a reasonable construction scheme is provided.
Disclosure of Invention
It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided a discontinuous section column transition node comprising:
the node main body is of a column structure with a hollow inside; the upper end of the node main body is circular, and the lower end of the node main body is square;
the cross steel rib column is connected in the column structure of the node main body, and the outer edge of the cross steel rib column is connected with the inner wall of the column structure;
the upper end circular section column transition plate is connected to the upper end of the node main body;
the upper end circular section column is connected above the upper end circular section column transition plate; a stiffening rib plate I is connected between the upper end circular section column and the upper end circular section column transition plate;
the lower end direction section column transition plate is connected to the lower end of the node main body;
a lower end-shaped section column connected below the lower end-shaped section column transition plate; and a stiffening rib plate II is connected between the lower end side section column and the lower end side section column transition plate.
Preferably, the node main body comprises a front wall plate, a rear wall plate, a left wall plate and a right wall plate which are connected; the upper ends of the front wall plate, the rear wall plate, the left wall plate and the right wall plate are arc-shaped to form the upper end of the node main body; the lower ends of the front wall plate, the rear wall plate, the left wall plate and the right wall plate are all linear so as to form square lower ends of the node main body; the wall surface of the node main body is arc-shaped.
Preferably, the cross steel rib column comprises a main body trapezoid plate and auxiliary trapezoid plates welded on two sides of the main body trapezoid plate.
Preferably, the main body trapezoid plate is firstly connected in the node main body through a positioning groove arranged on the inner wall of the node main body, and then is fixed on the inner wall of the node main body through welding.
Preferably, the outer edge of the cross steel rib column is welded with the inner wall of the column structure; the upper end circular section column transition plate is welded at the upper end of the node main body; the upper end circular section column is welded above the upper end circular section column transition plate; a stiffening rib plate I is welded between the upper end circular section column and the upper end circular section column transition plate; the lower end direction section column transition plate is welded at the upper end of the node main body; the lower end-shaped section column is welded below the lower end-shaped section column transition plate; and a stiffening rib plate II is welded between the lower end side cross section column and the lower end side cross section column transition plate.
Preferably, the stiffening rib plates I are arc-shaped bending rib plates; the connection mode of the arc bending slat is as follows: a convex mounting strip hole is formed in the upper circular section column; screw holes I are formed in the mounting strip holes; the upper end circular section column transition plate is provided with a screw hole II; one end of the arc-shaped bending slat is inserted into the mounting slat hole and is fixed on the upper circular section column through a screw hole I and a bolt I, and the other end of the arc-shaped bending slat is fixedly connected on the upper circular section column transition plate through a screw hole II and a bolt II; the connection part of the convex surface of the arc-shaped bending slat, the upper end circular section column and the upper end circular section column transition plate is provided with a high-strength spring I.
Preferably, a plurality of annular rib plates are welded and connected in the space formed by the cross-shaped steel rib column and the inside of the node main body; the outer surfaces of the annular rib plates are welded and connected with the wall surface of the cross steel rib column and the inner wall of the node main body; and high-strength springs II are welded in the annular rib plates.
The invention also provides a construction method of the discontinuous section column conversion node, which comprises the following steps:
step one, processing a node component, wherein the node component comprises a steel wall plate, a cross steel rib column, an upper end circular section column transition plate, a lower end square section column transition plate, a stiffening rib plate I and a stiffening rib plate II which are required by a node main body;
step two, assembling the node, which comprises the steps of firstly installing a lower square section column transition plate and a stiffening rib plate II at the lower end of a node main body; then positioning and welding a front wall plate, a left wall plate and a cross steel rib column of the node main body, and installing a rear wall plate, a right wall plate and an upper end circular section column transition plate; finally, an upper end circular section column is arranged on a transition plate of the upper end circular section column of the conversion node, and a stiffening rib plate I is connected at the joint of the upper end circular section column and the transition plate of the upper end circular section column;
thirdly, eliminating residual stress, adopting a vibration aging method to reduce welding residual stress of the node, placing each vibration process equipment and auxiliary parts according to requirements, and then placing the node on a bracket to ensure that a rubber pad of the vibration device is uniformly compressed; the vibration exciter is fixed above the node vibration end by a clamp, and the acceleration sensor is arranged in a steel column below the vibration exciter;
hoisting the node, hoisting the top end of the assembled conversion node after the construction of the lower-end-direction section column of the conversion node is completed, and connecting the lower-end-direction section column with a lower-end-direction section column transition plate and a stiffening rib plate II at the lower end of the node main body in a welding mode, wherein the contact surfaces between the stiffening rib plate II and the lower-end-direction section column transition plate and the lower-end-direction section column are welded; and after being connected with the lower end direction section column, the upper end circular section column transition plate and the stiffening rib plate I are welded with the upper end circular section column, so that an integral body is formed up and down.
Preferably, the center of the cross-shaped joint of the cross-shaped steel rib column is on the same vertical line with the centers of the upper circular section column and the lower square section column; the welding employs a multi-layer weld with suitably small heat input.
In the third step, welding residual stress of the node is reduced by adopting a vibration time-effect method, and the node is swept firstly to obtain 2 resonance peaks in a vibration amplitude-motor rotating speed curve; performing process vibration in the range of the sub-co-ratio of the lowest resonance peak; performing a second process vibration in the sub-resonance range of the sub-low resonance peak; and frequency sweeping is carried out again, and a vibration amplitude-motor rotating speed curve after the process is obtained.
The discontinuous section column conversion node provided by the invention forms a reliable conversion body between columns with different sections. The transition node realizes reliable transition through the transition body, thereby avoiding the phenomenon of stress concentration and the generation of shock-resistant weak parts caused by the transition connection of the traditional single-layer steel plates. The conversion node can effectively enhance the node shearing capacity. The proposed construction process such as welding has guiding effect on the construction of other structures, can effectively guide the engineering, and achieves the purposes of saving resources and shortening the construction period.
The invention at least comprises the following beneficial effects:
(1) The invention changes the cross section of the upper and lower partial columns, reduces the material consumption of the upper end column, reduces the gravity action of the upper column, optimizes the load distribution of the whole structure and saves unnecessary loss of steel;
(2) The invention realizes factory standardized construction, all the conversion node components can be directly prefabricated in the factory and then transported to the site for assembly, and is beneficial to realizing modular design, production industrialization, construction standardization and mechanization of the frame structure design. The invention has excellent integrity, greatly improves the earthquake resistance of the structure and effectively ensures the life and property safety of people;
(3) The invention has the advantages of convenient connection among working procedures, realization of three-dimensional cross operation, reduction of a large number of constructors, saving of labor cost, contribution to reduction of construction cost and improvement of working efficiency.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Description of the drawings:
FIG. 1 is an overall schematic of a discontinuous section column transition node of the present invention;
FIG. 2 is a schematic view of the structure of a node body according to the present invention;
FIG. 3 is a schematic view of a cross-shaped steel column according to the present invention;
FIG. 4 is a schematic view of the structure of the joint body and cross-shaped steel columns of the present invention;
FIG. 5 is a schematic view of another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cross-shaped steel column and a joint body according to another embodiment of the present invention.
The specific embodiment is as follows:
the present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
The invention discloses a discontinuous section column transition node as shown in fig. 1-6, comprising:
a node body 4 having a hollow column structure; the upper end of the node main body 4 is circular, and the lower end is square;
the cross steel rib column 8 is connected in the column structure of the node main body 4, and the outer edge of the cross steel rib column 8 is connected with the inner wall of the column structure;
an upper end circular section column transition plate 3 connected to an upper end of the node main body 4;
an upper circular section column 1 connected above the upper circular section column transition plate 3; a stiffening rib plate I2 is connected between the upper end circular section column 1 and the upper end circular section column transition plate 3;
a lower end-shaped section column transition plate 5 connected to the lower end of the node main body 4;
a lower end-shaped section column 7 connected below the lower end-shaped section column transition plate 5; and a stiffening rib plate II 6 is connected between the lower end-shaped section column 7 and the lower end-shaped section column transition plate 5.
In the technical scheme, a reliable conversion body (node main body) is formed between the columns with different sections, and the conversion node realizes reliable transition through the conversion body, so that the phenomenon of stress concentration and the generation of anti-seismic weak parts caused by conversion connection of the traditional single-layer steel plates are avoided. The conversion node can effectively enhance the node shearing capacity; the adopted cross steel column can be used for transmitting the load of the steel column with the round section at the upper end and ensuring the integral stability of the conversion node; the upper end round section column transition plate is a round thick steel plate with a certain size and is used for connecting the upper end round section column with the node main body; the lower end side section column transition plate (square steel plate) and the stiffening rib plate II form an annular shearing bracket which is connected with the lower end side section column.
In the above technical solution, the node main body 4 includes a front wall plate 41, a rear wall plate 42, a left wall plate 43, and a right wall plate 44; the upper ends of the front wall plate 41, the rear wall plate 42, the left wall plate 43 and the right wall plate 44 are arc-shaped to form a circular ring shape; the lower ends of the front wall plate 41, the rear wall plate 42, the left wall plate 43 and the right wall plate 44 are all straight lines so as to form a square lower end of the node main body; the wall surface of the node main body is arc-shaped; the front wall plate, the rear wall plate, the left wall plate and the right wall plate of the node main body are formed by blanking of a common steel plate through a numerical control cutting machine, grooves are formed according to requirements, and bending boundaries are drawn on the steel plate according to bending arc requirements; when the hydraulic press is adopted to press the arc, a master model is used for checking whether the arc is pressed in place or not while pressing, and finally the arc is connected into a whole in a welding mode.
In the above technical solution, the cross steel column 8 includes a main body trapezoid board 82 and auxiliary trapezoid boards 81,83 welded on two sides of the main body trapezoid board 82; the cross-shaped steel rib column is a cross-shaped section short column formed by welding and assembling three trapezoid steel plates and is used for transmitting the load of the upper circular section steel column and guaranteeing the overall stability of a conversion node, the main body trapezoid plate and the auxiliary trapezoid plate can be directly subjected to blanking processing and forming through a numerical control cutting machine and then transported to the site to be positioned and welded with a lifting jig of a conversion node wallboard, and the center of the cross-shaped node is required to be positioned and welded with the upper and lower different section columns in the same vertical line during positioning.
In the above technical solution, the main body trapezoid board 82 is first connected to the inside of the node main body 4 through a positioning slot provided on the inner wall of the node main body 4, and then fixed to the inner wall of the node main body through welding; by adopting the technical scheme, the welding mode of the cross steel rib column and the node main body is more stable.
In the technical scheme, the outer edge of the cross steel rib column is welded with the inner wall of the column structure; the upper end circular section column transition plate is welded at the upper end of the node main body; the upper end circular section column is welded above the upper end circular section column transition plate; a stiffening rib plate I is welded between the upper end circular section column and the upper end circular section column transition plate; the lower end direction section column transition plate is welded at the upper end of the node main body; the lower end-shaped section column is welded below the lower end-shaped section column transition plate; a stiffening rib plate II is welded between the lower end side cross section column and the lower end side cross section column transition plate; and the formed node is firmer by adopting a welding mode.
In the technical scheme, the stiffening rib plates I2 are arc-shaped bending rib plates; the connection mode of the arc bending slat is as follows: a convex mounting bar hole 21 is arranged on the upper circular section column; the mounting bar hole 21 is provided with a screw hole I; screw holes II are formed in the upper end circular section column transition plate 3; one end of the arc bending slat is inserted into the mounting slat hole 21 and is fixed on the upper circular section column 1 through a screw hole I and a bolt I24, and the other end of the arc bending slat is fixedly connected on the upper circular section column transition plate 3 through a screw hole II and a bolt II 32; the connection part of the convex surface of the arc-shaped bending slat and the upper end circular section column 1 and the upper end circular section column transition plate 3 is provided with a high-strength spring I25. By adopting the mode, the node component formed by the arc bending slat and the high-strength spring has large elastic deformation, can absorb and attenuate more damage energy, has strong anti-damage capability, improves the ultimate strength of the node, has simple structure, good manufacturability, is easy to manufacture and low production cost, and provides anti-seismic technical support for serving buildings with vibration and potential vibration threat in use environments.
In the above technical solution, a plurality of annular rib plates 9 are welded and connected in the space formed between the cross-shaped steel rib column 8 and the inside of the node main body 4; the outer surfaces of the annular rib plates 9 are welded and connected with the wall surface of the cross-shaped steel rib column 8 and the inner wall of the node main body; high-strength springs II 91 are welded in the plurality of annular rib plates; the annular rib plates 9 and the high-strength springs II 91 are adopted, so that the elastic deformation is large, the damage energy can be absorbed and attenuated more, the damage resistance is high, and the ultimate strength of the node is improved.
Example 1:
the construction method of the discontinuous section column conversion node comprises the following steps:
step one, processing node components, which comprises steel wall plates (a front wall plate, a rear wall plate, a left wall plate and a right wall plate) required by a node main body, cross steel rib columns, upper end round section column transition plates, lower end square section column transition plates, stiffening rib plates I and stiffening rib plates II; the outer steel wall plates (front wall plate, rear wall plate, left wall plate and right wall plate) of the node are processed by common steel plates; the cross-shaped steel rib column is a short column formed by welding and assembling three trapezoid common steel plates; the upper end round section column transition plate is a round common steel plate with a certain size and is used for connecting the upper end round section column with the node; the square steel plate of the transition plate of the lower end-shaped section column is connected with the lower end-shaped section column;
step two, assembling the node, which comprises the steps of firstly installing a lower square section column transition plate and a stiffening rib plate II at the lower end of a node main body; then positioning and welding a front wall plate, a left wall plate and a cross steel rib column of the node main body, and installing a rear wall plate, a right wall plate and an upper end circular section column transition plate; finally, an upper end circular section column is arranged on a transition plate of the upper end circular section column of the conversion node, and a stiffening rib plate I is connected at the joint of the upper end circular section column and the transition plate of the upper end circular section column;
thirdly, eliminating residual stress, adopting a vibration aging method to reduce welding residual stress of the node, placing each vibration process equipment and auxiliary parts according to requirements, and then placing the node on a bracket to ensure that a rubber pad of the vibration device is uniformly compressed; the vibration exciter is fixed above the node vibration end by a clamp, and the acceleration sensor is arranged in a steel column below the vibration exciter;
hoisting the node, hoisting the top end of the assembled conversion node after the construction of the lower-end-direction section column of the conversion node is completed, and connecting the lower-end-direction section column with a lower-end-direction section column transition plate and a stiffening rib plate II at the lower end of the node main body in a welding mode, wherein the contact surfaces between the stiffening rib plate II and the lower-end-direction section column transition plate and the lower-end-direction section column are welded; after being connected with the lower end side cross section column, the upper end circular cross section column transition plate and the stiffening rib plate I are welded with the upper end circular cross section column, so that an integral body is formed up and down;
the center of the cross-shaped joint of the cross-shaped steel rib column is on the same vertical line with the centers of the upper end circular section column and the lower end square section column; the welding adopts multi-layer welding with proper small heat input;
in the third step, a vibration time-effect method is adopted to reduce the welding residual stress of the node, and firstly, the frequency is swept to obtain 2 resonance peaks in a vibration amplitude-motor rotating speed curve; performing process vibration in the range of the sub-co-ratio of the lowest resonance peak; performing a second process vibration in the sub-resonance range of the sub-low resonance peak; frequency sweeping is carried out again, and a vibration amplitude-motor rotating speed curve after the process is obtained;
in the fourth step, before hoisting the conversion node, sand table exercise is carried out on hoisting machinery and a corresponding hoisting scheme, so that node damage or safety accidents are prevented in the node hoisting process.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. A discontinuous section column transition node, comprising:
the node main body is of a column structure with a hollow inside; the upper end of the node main body is circular, and the lower end of the node main body is square;
the cross steel rib column is connected in the column structure of the node main body, and the outer edge of the cross steel rib column is connected with the inner wall of the column structure;
the upper end circular section column transition plate is connected to the upper end of the node main body;
the upper end circular section column is connected above the upper end circular section column transition plate; a stiffening rib plate I is connected between the upper end circular section column and the upper end circular section column transition plate;
the lower end direction section column transition plate is connected to the lower end of the node main body;
a lower end-shaped section column connected below the lower end-shaped section column transition plate; a stiffening rib plate II is connected between the lower end side cross section column and the lower end side cross section column transition plate;
the node main body comprises a front wall plate, a rear wall plate, a left wall plate and a right wall plate which are connected; the upper ends of the front wall plate, the rear wall plate, the left wall plate and the right wall plate are arc-shaped to form the upper end of the node main body; the lower ends of the front wall plate, the rear wall plate, the left wall plate and the right wall plate are all linear so as to form square lower ends of the node main body; the wall surface of the node main body is arc-shaped;
a plurality of annular rib plates are welded and connected in a space formed between the cross-shaped steel rib column and the inside of the node main body; the outer surfaces of the annular rib plates are welded and connected with the wall surface of the cross steel rib column and the inner wall of the node main body; and high-strength springs II are welded in the annular rib plates.
2. The discrete section column transition node of claim 1 wherein said cruciform steel column comprises a main body trapezoidal plate and secondary trapezoidal plates welded on either side of the main body trapezoidal plate.
3. The discontinuous section column transition node of claim 2, wherein the
The main body trapezoid plate is connected in the node main body through a positioning groove arranged on the inner wall of the node main body, and then is fixed on the inner wall of the node main body through welding.
4. The discrete section column transition node of claim 1 wherein the outer edges of said cross-shaped steel columns are welded to the inner walls of the column structure; the upper end circular section column transition plate is welded at the upper end of the node main body; the upper end circular section column is welded above the upper end circular section column transition plate; a stiffening rib plate I is welded between the upper end circular section column and the upper end circular section column transition plate; the lower end direction section column transition plate is welded at the upper end of the node main body; the lower end-shaped section column is welded below the lower end-shaped section column transition plate; and a stiffening rib plate II is welded between the lower end side cross section column and the lower end side cross section column transition plate.
5. The discrete section column transition node of claim 1 wherein said stiffening rib i is an arcuate curved slat; the connection mode of the arc bending slat is as follows: a convex mounting strip hole is formed in the upper circular section column; screw holes I are formed in the mounting strip holes; the upper end circular section column transition plate is provided with a screw hole II; one end of the arc-shaped bending slat is inserted into the mounting slat hole and is fixed on the upper circular section column through a screw hole I and a bolt I, and the other end of the arc-shaped bending slat is fixedly connected on the upper circular section column transition plate through a screw hole II and a bolt II; the connection part of the convex surface of the arc-shaped bending slat, the upper end circular section column and the upper end circular section column transition plate is provided with a high-strength spring I.
6. A method of constructing a discontinuous section column transfer node according to any one of claims 1 to 5, comprising the steps of:
step one, processing a node component, wherein the node component comprises a steel wall plate, a cross steel rib column, an upper end circular section column transition plate, a lower end square section column transition plate, a stiffening rib plate I and a stiffening rib plate II which are required by a node main body;
step two, assembling the node, which comprises the steps of firstly installing a lower square section column transition plate and a stiffening rib plate II at the lower end of a node main body; then positioning and welding a front wall plate, a left wall plate and a cross steel rib column of the node main body, and installing a rear wall plate, a right wall plate and an upper end circular section column transition plate; finally, an upper end circular section column is arranged on a transition plate of the upper end circular section column of the conversion node, and a stiffening rib plate I is connected at the joint of the upper end circular section column and the transition plate of the upper end circular section column;
thirdly, eliminating residual stress, adopting a vibration aging method to reduce welding residual stress of the node, placing each vibration process equipment and auxiliary parts according to requirements, and then placing the node on a bracket to ensure that a rubber pad of the vibration device is uniformly compressed; the vibration exciter is fixed above the node vibration end by a clamp, and the acceleration sensor is arranged in a steel column below the vibration exciter;
hoisting the node, hoisting the top end of the assembled conversion node after the construction of the lower-end-direction section column of the conversion node is completed, and connecting the lower-end-direction section column with a lower-end-direction section column transition plate and a stiffening rib plate II at the lower end of the node main body in a welding mode, wherein the contact surfaces between the stiffening rib plate II and the lower-end-direction section column transition plate and the lower-end-direction section column are welded; and after being connected with the lower end direction section column, the upper end circular section column transition plate and the stiffening rib plate I are welded with the upper end circular section column, so that an integral body is formed up and down.
7. The method of constructing a discrete cross-section column transfer node of claim 6 wherein the cross-shaped node center of the cross-shaped steel rib column is on the same vertical line as the centers of the upper circular cross-section column and the lower square cross-section column; the welding employs a multi-layer weld with suitably small heat input.
8. The method for constructing a discontinuous section column conversion node according to claim 6, wherein in the third step, the node is subjected to welding residual stress reduction by using a vibration time-effect method, and first, a frequency is swept to obtain 2 resonance peaks in a vibration amplitude-motor rotation speed curve; performing process vibration in a subfreezing rate range of the lowest resonance peak; then carrying out second process vibration in the sub-resonance range of the second low resonance peak; and frequency sweeping is carried out again, and a vibration amplitude-motor rotating speed curve after the process is obtained.
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| CN111088850B (en) * | 2019-12-31 | 2022-03-29 | 江苏沪宁钢机股份有限公司 | Horseshoe-shaped node and manufacturing method thereof |
| CN112692508A (en) * | 2020-12-29 | 2021-04-23 | 江苏沪宁钢机股份有限公司 | Cross-shaped rotating circular tube section steel column and working method thereof |
| CN113305507B (en) * | 2021-05-21 | 2022-05-20 | 浙江东南网架股份有限公司 | Method for processing welded box with fillet |
| CN115354760B (en) * | 2022-08-18 | 2023-11-07 | 中铁二院工程集团有限责任公司 | Conversion node of round steel pipe column in cross column concrete column |
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| CN205116426U (en) * | 2015-04-30 | 2016-03-30 | 中铁建设集团有限公司 | Conversion node device |
| CN208533714U (en) * | 2018-07-27 | 2019-02-22 | 中铁建设集团有限公司 | Discontinuous Section Column switching node |
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| US6427393B1 (en) * | 2001-01-26 | 2002-08-06 | Sinotech Engineering Consultants, Inc. | Seismic-resistant beam-to-column moment connection |
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| CN101435225A (en) * | 2008-12-12 | 2009-05-20 | 北京工业大学 | Hollow steel node for connecting steel pipe columns of different shapes |
| CN205116426U (en) * | 2015-04-30 | 2016-03-30 | 中铁建设集团有限公司 | Conversion node device |
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