CN101949173A - Rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint - Google Patents
Rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint Download PDFInfo
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- CN101949173A CN101949173A CN2010102989994A CN201010298999A CN101949173A CN 101949173 A CN101949173 A CN 101949173A CN 2010102989994 A CN2010102989994 A CN 2010102989994A CN 201010298999 A CN201010298999 A CN 201010298999A CN 101949173 A CN101949173 A CN 101949173A
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Abstract
The invention discloses a rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint aiming to solve the problems of complex manufacturing process, long construction period, and the like in the prior art. The rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint comprises a rectangular pipe column and an H-shaped steel beam, wherein a corbel box-shaped corbel connecting member is arranged between the rectangular pipe column and the H-shaped steel beam; the box-shaped corbel connecting member comprises an upper end plate, a lower end plate and a vertical plate, wherein the vertical plate is arranged between the upper end plate and the lower end plate, one sides of the upper end plate and the lower end plate are arranged on the side surface of the rectangular pipe column, and one sides opposite to the sides and the vertical plate are respectively connected with a top flange, a bottom flange and a ventral shield of the H-shaped steel beam. The invention has the advantages of completing the internal force transmission of the joint by the arrangement of the box-shaped corbel connecting piece, preventing the stress of a welding line from centralizing, enhancing the shock resistance and the bending resistance of the joint, realizing batch production, enhancing processing efficiency, simplifying the process, enhancing welding quality, reducing construction difficulty and being convenient for transportation and building space arrangement, solving the problem of difficult welding of a partition board in the rectangular pipe column, achieving the combination of industrialized flow line production and field fast assembly and splicing and shortening the building construction period.
Description
Technical field
The present invention relates to a kind of bean column node, particularly the quarter bend post specifically comprises the welding box column, rolling quarter bend post and quarter bend concrete column and H shape girder steel be connected vertically outreach rigid joint.
Background technology
In recent years, especially after Wenchuan earthquake, the anti-seismic performance of China's steel house and the research and development of suitability for industrialized production thereof become a hot issue gradually, but the research of system of steel residential structure be applied in China and also be in the starting stage.
In system of steel residential structure, small bore box column and quarter bend post, and the quarter bend concrete column is big because of its rigidity, two major axes orientation rigidity are identical or close, and steel using amount advantage such as is more economized and is widely used.Therefore the frame application that is formed by connecting of quarter bend post (welding box column, rolling quarter bend post and quarter bend concrete column) and H shape girder steel is a kind of good selection in the normal domestic steel structure system.
The application of steel work is extensive all the more.Compare with other form of structure, construction steel structure has remarkable anti-seismic performance, and earthquake is less in all previous earthquake, stands the test, and rare whole 30 and the phenomenon of collapsing.But in earthquake; local failure takes place through regular meeting in steel work; shake celestially as the U.S. on the 17th CaliforniaNorthridge earthquake January in 1997 and the Japanese slope in January 17 nineteen ninety-five, wherein, the one of the main reasons that causes earthquake is that brittle fracture takes place at the bean column node place.So, with a very important position in integrally-built design of the design of the ductility of steel structure node, energy-dissipating property.
The basic principle of seismic design is " strong shear capacity and weak bending capacity, strong column and weak beam, the weak member of strong node ".Can find out that thus for earthquake resistant structure, the reasonability of design of node structure is directly connected to the anti-seismic performance of total from a side.Bean column node is the central hub of total power transmission, is " main joint " that total is played a role.Therefore, if can research and design go out a kind of stressed clear and definite rationally, simple structure, easy construction, superior, the economical and practical bean column node of anti-seismic performance, will make whole field of steel structure reach a new height.But also there are a lot of problems in bean column node at present.
Each allusion quotation shape node existing problem is as follows:
1, " internal partition formula node ", this category node only is applicable to the welding box column, to rolling quarter bend post and inapplicable, need carry out the inside welding, the welding difficulty, weldquality be difficult for to guarantee, and dividing plate exists and can influence concreting, simultaneously, because the node weld seam is more, steel plasticity descends near causing the node weld seam, and fragility increases, and influences further developing of structural plasticity;
2, " outreach gusset-type joint ".The size of outer annular-stiffer is bigger, and is especially less owing to the concrete filled steel tube column section in the concrete filled steel tube dwelling house, when the size of outer heavier-duty node ring flat-plate is bigger, makes troubles often for architectural processing, and interior has considerable influence to dwelling house.
Summary of the invention
In order to overcome above-mentioned defective, the object of the present invention is to provide a kind of technology simple, be convenient to process, reliability is higher, Fast Installation, short quarter bend post and H shape girder steel of construction period vertically outreach rigid joint.
In order to achieve the above object, quarter bend post of the present invention and H shape girder steel vertically outreach rigid joint, comprise the H shape girder steel that the quarter bend post is connected with side with described quarter bend post, be provided with box-shaped bracket connector between described quarter bend post and the H shape girder steel, described box-shaped bracket connector comprises and described vertically disposed upper head plate of quarter bend post center line and bottom plate and be arranged on riser between the described upper and lower end plate, described upper and lower end plate is arranged on the described quarter bend post side on one side, and one side relative with it and riser connect the described upper and lower edge of a wing of H shape girder steel and web respectively.Quarter bend post herein is welding box column, rolling quarter bend post or quarter bend concrete column.
Particularly, described upper and lower end plate all is hexagon, this hexagon is constituted with one side rectangle consistent with this trapezoidal long base by trapezoidal, the limit that the upper and lower end plate of described hexagon is relative with described trapezoidal short base all is arranged on the described quarter bend post side, and short base and riser connect the described upper and lower edge of a wing of H shape girder steel and web respectively; Described riser be connected with the upper and lower end plate of described hexagon middle part respectively and with all vertical setting in side of upper and lower end plate of this hexagon and connected quarter bend post.
Wherein, the rectangular edges of the both sides of edges that connects of the upper and lower end plate of described hexagon and described quarter bend post is corresponding up and down respectively is provided with vertically-arranged strength plate and connects.
Further, described trapezoidal upper and lower end plate is an isosceles trapezoid, and its side gradient is 1: 4-1: between 1.
Particularly, the length on described trapezoidal long base is between 125mm-500mm.
Further, the long base of described trapezoidal upper and lower end plate length is consistent with the described quarter bend post lateral width that connects this long base, and short base is consistent with the upper and lower edge of a wing of the described H shape girder steel that connects this short base.
Further, described riser is rectangular.
Particularly, be connected by bolt by the side plate that is arranged on its at least one side respectively between the welding respectively between described box-shaped bracket connector and described quarter bend post side and the upper and lower edge of a wing of H shape girder steel and between the upper and lower end plate of box-shaped bracket connector and the left and right riser, described riser and H shape steel beam web plate or weld.
Wherein, described box-shaped bracket connector is one to four, and adjacent respectively 90 degree are provided with or relative 180 degree are provided with; The two adjacent vertically-arranged strength plates of two box-shaped brackets of adjacent setting form " L " shape connector, should " L " shape connector be angle steel or welding steel.The quarter bend post side that the box-shaped bracket is not set is provided with obedient plate, and this card plate and described vertically-arranged strength plate are wholely set.
Above-mentioned structure, node is stressed clear and definite has rationally avoided the complicated applied force state, and the beam-ends moment of flexure, the shearing transmission should be fully reliable; The strong column and weak beam definite conception has good ductility and energy-dissipating property, the protection node; The energy mass production improves working (machining) efficiency; The processing of node plate should be simple process; The scene is avoided occurring facing upward, side weld, improves welding quality, reduces constructional difficulties; Joint structure should be simple, is convenient to transportation and architectural space like this and arranges; The cancellation dividing plate guarantees the free placing of on-site concrete, can effectively improve the rigidity and the bearing capacity of post like this; On-the-spot installation rate is fast, and beam column field Welding quality is guaranteed, reaches the production of industrialization streamline and combines with the on-the-spot splicing of assembling fast, shortens the building operations duration.
Description of drawings
Fig. 1 is a background technology internal partition formula nodal plane structural representation of the present invention.
Fig. 2 is along 1-1 direction sectional structure schematic diagram among Fig. 1.
Fig. 3 is background technology of the present invention China and foreign countries yoke plate formula nodal plane structural representation.
Fig. 4 is along 1-1 direction sectional structure schematic diagram among Fig. 3.
Fig. 5 is the nodal plane figure of first specific embodiment of the present invention.
Fig. 6 is the main TV structure schematic diagram of Fig. 5.
Fig. 7 is the nodal plane figure of second specific embodiment of the present invention.
Fig. 8 is the distortion nodal plane figure of second specific embodiment of the present invention.
Fig. 9 is the nodal plane figure of the 3rd specific embodiment of the present invention.
Figure 10 is the nodal plane figure of the 4th specific embodiment of the present invention.
Figure 11 is the front view of Figure 10.
Figure 12 VonMises stress cloud atlas.
Figure 13 hysteresis loop comparison diagram.
The specific embodiment
The present invention is described in more detail below in conjunction with drawings and Examples.
Shown in Fig. 1-13, quarter bend post of the present invention and H shape girder steel vertically outreach rigid joint, comprise the H shape girder steel 3 that the quarter bend post 2 that is connected with steel work is connected with side with described quarter bend post, as first specific embodiment of the present invention, be provided with a box-shaped bracket connector 1 between described quarter bend post and the H shape girder steel and form podomere point, described box-shaped bracket connector comprise with vertically disposed upper head plate 11 of described quarter bend post center line and bottom plate 12 and be arranged on described on, riser 13 between the bottom plate, on described, end plate all is hexagon, and this hexagon is by trapezoidal and one side b
aThe rectangle consistent with this trapezoidal long base constitutes, upper and lower end plate of described hexagon and described trapezoidal short base b
bRelative limit all is arranged on the described quarter bend post side, and short base and riser connect the upper and lower edge of a wing 31,32 of described H shape girder steel and web 33 respectively.Described riser be connected with the upper and lower end plate of described hexagon middle part respectively and with all vertical setting in side of upper and lower end plate of this hexagon and connected quarter bend post.Described riser 13 is rectangular.Be connected by high-strength bolt 17 by being arranged on its left and right side plate that connects side 15,16 respectively between the welding respectively between described box-shaped bracket connector and described quarter bend post side and the upper and lower edge of a wing of H shape girder steel and between the upper and lower end plate of box-shaped bracket connector and the left and right riser, described riser and H shape steel beam web plate.Described trapezoidal upper and lower end plate is an isosceles trapezoid, and its side gradient is 1: 4-1: between 1.The length on described trapezoidal long base satisfies 125mm≤b
a≤ 500mm; Wherein, b
a〉=1.5b
bFurther, the long base of described trapezoidal upper and lower end plate length is consistent with the described quarter bend post lateral width that connects this long base, and short base is consistent with the upper and lower edge of a wing of the described H shape girder steel that connects this short base.Wherein, the rectangular edges of the both sides of edges that connects of the upper and lower end plate of described hexagon and described quarter bend post is corresponding up and down respectively is provided with vertically-arranged strength plate 14 and connects.As shown in figure 12, described vertically-arranged strength plate 14 is arranged on up and down between end plate 11,12 both sides.Fig. 5, Figure 6 shows that a limb box-shaped bracket node structure, can adopt obedient plate 5 to be welded on the rectangular conduit both sides, the end that obedient plate 5 outwards suspends places and forms vertically-arranged strength plate 14 up and down between the end plate.
Processing technology is: frange plate is widened the box-shaped bracket connector of thickening about making, finish the welding of box-shaped bracket connector and box column in factory, the splicing and the welding of last underbeam edge of the friction form height strength bolt by web again during on-the-spot the installation forms and being rigidly connected of girder (quarter bend post).Like this, when satisfying strong column and weak beam, node reinforcement shockproof requirements, not only satisfied industrial production requirement, guaranteed the weldquality of beam column junction,, made on-the-spot installation rate fast by force, the cripetura construction period again because of internal partition need not be set.
Above-mentioned node structure is analyzed from the mechanical property aspect, and node is stressed should be clearly reasonable, avoids the appearance of complicated applied force state; Beam-ends moment of flexure, shearing transmission should be fully reliable; The strong column and weak beam definite conception forces plastic hinge to form in the position of departing from the node root under the effect of macroseism, has good ductility and energy-dissipating property, thereby reaches the purpose of protection node; Aspect processing technology; The node critical piece can be produced in batches in factory's linearisation, improves working (machining) efficiency; The processing of node plate should be simple process, both can adopt technologies such as hot bending, welding to finish; The node main weld is avoided the clod wash angle, to avoid the brittle fracture of weld seam influence area; Consider the technology matching relationship of material and bent angle, with convenient processing; Non-standard fastener producer can produce; Node region cancellation dividing plate guarantees that pillar is elongated, need not man-hour to block adding; Aspect construction technology, the scene is avoided occurring facing upward, side weld, improves welding quality, reduces constructional difficulties; Joint structure should be simple, is convenient to transportation and architectural space like this and arranges; The cancellation dividing plate guarantees the free placing of on-site concrete, can effectively improve the rigidity and the bearing capacity of pillar like this; On-the-spot installation rate is fast, and beam column field Welding quality is guaranteed, reaches the production of industrialization streamline and combines with the on-the-spot splicing of assembling fast, shortens the building operations duration.
As second specific embodiment of the present invention, described box-shaped bracket connector is two and forms two podomeres point that relative 180 degree are provided with, as shown in Figure 7, as a kind of distortion of the present invention, adjacent 90 degree of described two box-shaped bracket connectors are provided with, the described corner post node that is suitable for, as shown in Figure 8.The quarter bend post side that the box-shaped bracket is not set forms vertically-arranged strength plate 14 with obedient plate 5 welding between the end plate about the end that obedient plate 5 outwards suspends places.
As the 3rd specific embodiment of the present invention, described box-shaped bracket connector is three formation three podomeres points, as shown in Figure 9.Weld with obedient plate 5 the quarter bend post side that the box-shaped bracket is not set, and vertically-arranged strength plate and obedient plate are wholely set.
As the 4th specific embodiment of the present invention, described box-shaped bracket connector is four, shown in Figure 10,11.
Adjacent respectively 90 degree are provided with or relative 180 degree are provided with; The two adjacent vertically-arranged strength plates of two box-shaped brackets of adjacent setting form " L " shape connector 17, should " L " shape connector be angle steel or welding steel.
During earthquake, distortion occurs in the flange width position that narrows down, and has avoided the situation that distortion concentrates on beam-ends.And the distortion happening part can freely be controlled with the variation of side plate length and width size.Like this, the beam-ends plastic deformation ability strengthens, thereby the steel structure earthquake-resistant ability is increased substantially.
The parameter value scope is:
A 〉=100mm (a should not less than 100mm) herein
B 〉=100mm (b should not less than 100mm) herein
c＝(b
c-b
b)/2
t
f＝t
f+(0～4)mm
Model central sill post model size is as shown in the table when adopting finite element analysis:
Table 1 beam column gauge size
| Beam | HN300×150×6.5×9 | L＝1600mm |
| Post | Mouth 350 * 350 * 12 | L＝1400mm |
| a＝150mm | b＝100mm | c＝250mm |
The comparative analysis model is chosen " many, high-rise civil building steel structure node constructional detail " box section beam column joint form that is provided with the horizontal stiffener of external coupling type in (01SG519), wherein b
s=75mm.
Above-mentioned model is carried out elasto-plastic finite element analysis under the same conditions, and its structure such as Figure 18-20:
By above-mentioned comparative analysis as can be known, expand obviously outer the moving of beam-ends plastic hinge of plate node, satisfy the seismic design thought of strong column and weak beam, the weak member of strong node, reached the protection node effect identical as the horizontal stiffener node of external coupling type.
Make the hysteresis loop of above-mentioned each model under geological process as shown in figure 13:
By contrasting above-mentioned hysteresis loop and skeleton curve as can be known, quarter bend post and H shape girder steel vertically outreach rigid joint and external coupling type node hysteresis loop is all fuller, skeleton curve is close, and both all have good ductility and power consumption property.
Quarter bend post and H shape girder steel vertically outreach rigid joint internal partition need not be set, and the difficulty when so just having overcome the internal partition welding has the convenience of constructing preferably.
By as can be known to the comparative analysis of beam-ends plastic hinge, expand gusset-type joint and intending under the geological process, plastic hinge moves outward, satisfies the seismic design requirement of strong column and weak beam and the weak member of strong node.
By to the hysteresis loop that expands gusset-type joint and external coupling type node and skeleton curve analysis as can be known, the two load-displacement hysteresis curve is spindle, does not pinch the phenomenon that contracts, and illustrates that this node when load-bearing, has good energy-dissipating property.
In sum, expanding gusset-type joint is a kind of joint form convenient, excellent earthquake resistance of constructing, and has higher value in engineering reality.
The present invention is not limited to above-mentioned embodiment, no matter do any variation on its shape or structure, everyly utilizes above-mentioned all to be a kind of distortion of the present invention, all should to think and drop within the protection domain of the present invention.
Claims (10)
1. quarter bend post and H shape girder steel vertically outreach rigid joint, comprise the H shape girder steel that the quarter bend post is connected with side with described quarter bend post, it is characterized in that, be provided with bracket box-shaped bracket connector between described quarter bend post and the H shape girder steel, described bracket box-shaped bracket connector comprises and described vertically disposed upper head plate of quarter bend post center line and bottom plate and be arranged on riser between the described upper and lower end plate, described upper and lower end plate is arranged on the described quarter bend post side on one side, and one side relative with it and riser connect the described upper and lower edge of a wing of H shape girder steel and web respectively.
2. quarter bend post as claimed in claim 1 and H shape girder steel vertically outreach rigid joint, it is characterized in that, described upper and lower end plate all is hexagon, this hexagon is constituted with one side rectangle consistent with this trapezoidal long base by trapezoidal, the limit that the upper and lower end plate of described hexagon is relative with described trapezoidal short base all is arranged on the described quarter bend post side, and short base and riser connect the described upper and lower edge of a wing of H shape girder steel and web respectively; Described riser be connected with the upper and lower end plate of described hexagon middle part respectively and with all vertical setting in side of upper and lower end plate of this hexagon and connected quarter bend post.
3. quarter bend post as claimed in claim 2 and H shape girder steel vertically outreach rigid joint, it is characterized in that, the rectangular edges of the both sides of edges that the upper and lower end plate of described hexagon and described quarter bend post connect is corresponding up and down respectively to be provided with vertically-arranged strength plate and to connect.
4. quarter bend post as claimed in claim 3 and H shape girder steel vertically outreach rigid joint, it is characterized in that, described trapezoidal upper and lower end plate is an isosceles trapezoid, and its side gradient is 1: 4-1: between 1.
5. quarter bend post as claimed in claim 4 and H shape girder steel vertically outreach rigid joint, it is characterized in that the length on described trapezoidal long base is between 125mm-500mm.
6. quarter bend post as claimed in claim 5 and H shape girder steel vertically outreach rigid joint, it is characterized in that, the long base of described trapezoidal upper and lower end plate length is consistent with the described quarter bend post lateral width that connects this long base, and short base is consistent with the upper and lower edge of a wing of the described H shape girder steel that connects this short base.
7. quarter bend post as claimed in claim 6 and H shape girder steel vertically outreach rigid joint, it is characterized in that described riser is rectangular.
8. quarter bend post as claimed in claim 7 and H shape girder steel vertically outreach rigid joint, it is characterized in that, be connected by bolt by the side plate that is arranged on its at least one side respectively between the welding respectively between described bracket box-shaped bracket connector and described quarter bend post side and the upper and lower edge of a wing of H shape girder steel and between the upper and lower end plate of bracket box-shaped bracket connector and the left and right riser, described riser and H shape steel beam web plate or weld.
9. quarter bend post as claimed in claim 8 and H shape girder steel vertically outreach rigid joint, it is characterized in that, described box-shaped bracket connector is one to four, and adjacent respectively 90 degree are provided with or relative 180 degree are provided with; The two adjacent vertically-arranged strength plates of two box-shaped brackets of adjacent setting form " L " shape connector, should " L " shape connector be angle steel or welding steel.
As claim 1-9 arbitrary as described in quarter bend post and H shape girder steel vertically outreach rigid joint, it is characterized in that the quarter bend post is welding box column, rolling quarter bend post or quarter bend concrete column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010298999 CN101949173B (en) | 2010-09-29 | 2010-09-29 | Rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010298999 CN101949173B (en) | 2010-09-29 | 2010-09-29 | Rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint |
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| Publication Number | Publication Date |
|---|---|
| CN101949173A true CN101949173A (en) | 2011-01-19 |
| CN101949173B CN101949173B (en) | 2013-01-23 |
Family
ID=43452788
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|---|---|---|---|
| CN 201010298999 Expired - Fee Related CN101949173B (en) | 2010-09-29 | 2010-09-29 | Rectangular pipe column and H-shaped steel beam vertical externally-connected rigidly-connected joint |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995758A (en) * | 2012-12-14 | 2013-03-27 | 金天德 | Rigid-connection node of combined steel-pipe concrete column and steel beam |
| CN103015534A (en) * | 2012-12-14 | 2013-04-03 | 金天德 | Lateral connection node of concrete-filled rectangular steel tube column and steel beams |
| CN104947796A (en) * | 2015-07-08 | 2015-09-30 | 无锡顺达智能自动化工程股份有限公司 | Adjustable bracket structure |
| CN106593000A (en) * | 2016-12-14 | 2017-04-26 | 广州大学 | Tensile bonded rebar structure |
| CN107190854A (en) * | 2017-06-21 | 2017-09-22 | 长沙三远钢结构有限公司 | Heavy wall insertion box steel column node |
| CN107190853A (en) * | 2017-06-21 | 2017-09-22 | 长沙三远钢结构有限公司 | Heavy wall insertion node square hollow section steel component framework system and its construction method |
| CN109162354A (en) * | 2018-10-25 | 2019-01-08 | 安徽建筑大学 | A kind of assembled connecting node of double brackets |
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| JP2004027655A (en) * | 2002-06-26 | 2004-01-29 | Masakatsu Uchida | Column-beam joint part intersecting method for building steel structure |
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| JP2006009437A (en) * | 2004-06-25 | 2006-01-12 | Okabe Co Ltd | Method of joining steel-frame column and steel-frame beam, these joint structure, and beam bracket for joining use |
| CN2780401Y (en) * | 2005-03-14 | 2006-05-17 | 北京工业大学 | Connecting nodal point of box-shaped steel column and I-steel beam |
| CN202139692U (en) * | 2010-09-29 | 2012-02-08 | 中冶建筑研究总院有限公司 | Vertical external connection and rigid connection node for rectangular tubular column and H-shaped steel beam |
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| JP2004027655A (en) * | 2002-06-26 | 2004-01-29 | Masakatsu Uchida | Column-beam joint part intersecting method for building steel structure |
| CN2670469Y (en) * | 2003-12-17 | 2005-01-12 | 浙江杭萧钢构股份有限公司 | Structure of beam-column and supporting node |
| JP2006009437A (en) * | 2004-06-25 | 2006-01-12 | Okabe Co Ltd | Method of joining steel-frame column and steel-frame beam, these joint structure, and beam bracket for joining use |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102995758A (en) * | 2012-12-14 | 2013-03-27 | 金天德 | Rigid-connection node of combined steel-pipe concrete column and steel beam |
| CN103015534A (en) * | 2012-12-14 | 2013-04-03 | 金天德 | Lateral connection node of concrete-filled rectangular steel tube column and steel beams |
| CN104947796A (en) * | 2015-07-08 | 2015-09-30 | 无锡顺达智能自动化工程股份有限公司 | Adjustable bracket structure |
| CN106593000A (en) * | 2016-12-14 | 2017-04-26 | 广州大学 | Tensile bonded rebar structure |
| CN107190854A (en) * | 2017-06-21 | 2017-09-22 | 长沙三远钢结构有限公司 | Heavy wall insertion box steel column node |
| CN107190853A (en) * | 2017-06-21 | 2017-09-22 | 长沙三远钢结构有限公司 | Heavy wall insertion node square hollow section steel component framework system and its construction method |
| CN109162354A (en) * | 2018-10-25 | 2019-01-08 | 安徽建筑大学 | A kind of assembled connecting node of double brackets |
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| Publication number | Publication date |
|---|---|
| CN101949173B (en) | 2013-01-23 |
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