CN103526950A - Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse - Google Patents
Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse Download PDFInfo
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- CN103526950A CN103526950A CN201310519227.2A CN201310519227A CN103526950A CN 103526950 A CN103526950 A CN 103526950A CN 201310519227 A CN201310519227 A CN 201310519227A CN 103526950 A CN103526950 A CN 103526950A
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Abstract
The invention discloses a concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse. The joint comprise a concrete-filled square steel tube column and an I-shaped steel beam. Internal partitions and reinforcing plates are respectively disposed inside and outside the square steel tube walls corresponding to the upper flange and the lower flange of the steel beam. A U-shaped steel connecting plate winds around the square steel tube column wall and is fixed with I-shaped steel beam webs on two sides of the column through high-strength bolts. The beam columns are connected through the U-shaped steel connecting plate and the high-strength bolts. The U-shaped steel connecting plate is also used as a vertical joint connecting plate. The internal partitions under impact load can avoid local buckling of square steel tube column walls. The reinforcing plates can increase joint end bending resistance. The joint is reasonable in structure, uncontinuous beams are integrated while column continuity is also considered, structural integrity and joint ductility are increased, dynamic effect during partial component failure is relieved, and progressive collapse preventing capability is increased.
Description
Technical field
The invention belongs to construction engineering technical field, relate to steel tube-concrete composite structure, relate in particular to a kind of concrete-filled steel square tubular column in many high-rise steel structure and reinforcing joint for resisting continuous collapse of girder steel of being applicable to.
Background technology
In the last few years, along with improving constantly of engineering level, building structure was to maximization, complicated development.Meanwhile, to the requirement of safety of structure also in continuous raising.In general, as the final collapse state of fruit structure and initial destroy state disproportionate, can be referred to as continuous collapse.Once continuous collapse occurs, and generally causes serious life and property loss, and produces severe social influence.Thereby, how to reduce local failure to integrally-built impact, and prevent that structure from, because local failure causes Progressive Collapse, having obtained researchers' great attention.
In the design of steel work, according to the needs of the principle of " strong column and weak beam " and construction, generally take post to connect and mode that beam does not connect, beam is connected on post by node.Therefore, node is the weakness of steel framed structure opposing incidental load, impact load, once node is lost supporting capacity, will cause structural collapse.
The method of the current anti-fall joint reinforcing that collapses mainly contains node four sides welding steel, in methods such as beam rib place's ribbings, although these class methods can effectively be controlled the destruction of node in collapsing procedure, its cost is high, construction is complicated; The method of the increase beam junction plate occurring in recent years need to be punched on the post edge of a wing and web, and makes junction plate run through post, can destroy like this continuity, the weakening cross section, the post edge of a wing of post, causes flange stress to concentrate, and has certain potential safety hazard.
Summary of the invention
The object of the invention is to, for existing above-mentioned technical deficiency, provide a kind of new ductile reinforcing joint form that is conducive to encased structures opposing continuous collapse.Solve current anti-fall collapsing and reinforced the technical barriers such as bean column node cost is high, construction is complicated.
In order to realize above object, technical scheme of the present invention is:
In the square steel tube wall corresponding to the upper and lower edge of a wing of girder steel, establish respectively internal partition, on the square steel tube wall at place, the upper and lower edge of a wing of girder steel, establish respectively stiffener, jointly form angle connector with horizontal connecting plate and be welded on outside concrete filled steel tube post jamb; A U-shaped steel junction plate is walked around and is welded on square steel pipe post jamb, and U-shaped steel junction plate doubles as vertical junction plate and uses, and fixes by high-strength bolt with the i shaped steel web of post both sides; Guaranteeing under the prerequisite of enough bonding strengths, by the part excision at U-shaped steel junction plate middle part.
The job practices of Concrete-Filled Square Steel Tube of the present invention and the semi-rigid reinforcing joint of girder steel progressive collapse-resisting is, during construction, horizontal connecting plate, U-shaped steel junction plate and stiffener, in the outside fix of concrete-filled steel square tubular column wall, and is welded on outside Concrete-Filled Square Steel Tube wall; Internal partition flushes with the outer horizontal connecting plate of concrete-filled steel square tubular column wall, and is welded in concrete-filled steel square tubular column wall; The edge of a wing of i-shape steel beam is connected with high-strength bolt with horizontal connecting plate, the web of i-shape steel beam is connected with high-strength bolt with U-shaped steel junction plate.
Compared with prior art, tool of the present invention has the following advantages:
1, in the present invention, U-shaped steel junction plate couples together the beam not connecting on same axis, does not destroy again the globality of post, has strengthened the continuity of structure, thereby effectively strengthens the ability of node opposing catenary pulling force.
2, described U-shaped steel junction plate is connected the girder steel of post both sides by high-strength bolt, and the double effect of playing vertical junction plate is guaranteeing under the prerequisite of enough bonding strengths, by the part excision at junction plate middle part, saves that steel, cost are low, simple structure.
3, in center pillar of the present invention, establish internal partition, power transmission route is clearly reliable, under Impact Load, can avoid the cripling of concrete-filled steel square tubular column wall.
4, the stiffener that the present invention adopts can increase the bending resistance of node end, thus the position that adjustment node rotates.
5, semi-rigid reinforcing joint has good deformability and energy dissipation capacity, by controlling beam-ends plastic hinge dissipation impact energy, prevents from destroying because of connected node the continuous collapse that causes structure.
Accompanying drawing explanation
?fig. 1 is the example structure schematic diagram of Concrete-Filled Square Steel Tube of the present invention and the semi-rigid reinforcing joint of girder steel progressive collapse-resisting.
Fig. 2 is top view of the present invention.
Fig. 3 is U-shaped steel connecting board structure schematic diagram in the present invention.
1-concrete-filled steel square tubular column in figure, 2-i-shape steel beam, 3-internal partition, 4-stiffener, 5-horizontal connecting plate, 6-high strength friction-type bolt, 7-U shaped steel junction plate processed.
The specific embodiment
Below with reference to accompanying drawing and example in detail the specific embodiment of the present invention:
As depicted in figs. 1 and 2, the present invention includes concrete-filled steel square tubular column 1 and i-shape steel beam 2, in the square steel tube wall corresponding to the girder steel 2 upper and lower edges of a wing, establish respectively internal partition 3, square steel tube wall at place, the upper and lower edge of a wing of i-shape steel beam 2 is respectively equipped with horizontal connecting plate 5 outward, and horizontal connecting plate 5 is fixed on the edge of a wing of i-shape steel beam 2 by high-strength bolt 6; On the square steel tube wall at place, the upper and lower edge of a wing of girder steel 2, establish respectively stiffener 4, be welded on outside the wall of steel core concrete column 1 with the common angle connector that forms of horizontal connecting plate 5; Two U-shaped steel junction plates 7 are walked around and are welded on the wall of quadrate steel pipe column 1, and U-shaped steel junction plate 7 doubles as vertical junction plate and uses, and fixing by high-strength bolt 6 with i-shape steel beam 2 webs of concrete-filled steel square tubular column 1 both sides; Guaranteeing under the prerequisite of enough bonding strengths, by the part excision at U-shaped steel junction plate 7 middle parts.
During construction:
1, by horizontal connecting plate 4, U-shaped steel junction plate 7 and stiffener 4 in the outside fix of concrete-filled steel square tubular column wall, and be welded on outside concrete-filled steel square tubular column 1 wall;
2, internal partition 3 flushes with the outer horizontal connecting plate 5 of concrete-filled steel square tubular column 1 wall, and is welded in concrete-filled steel square tubular column 1 wall;
3, the edge of a wing of i-shape steel beam 2 is connected with horizontal connecting plate 5 use high-strength bolts 6, the web of i-shape steel beam 2 is connected with U-shaped steel junction plate 7 use high-strength bolts 6.
Claims (3)
1. a Concrete-Filled Square Steel Tube and the semi-rigid reinforcing joint of girder steel progressive collapse-resisting, comprise concrete-filled steel square tubular column and i-shape steel beam, it is characterized in that, a prefabricated U-shaped steel junction plate, junction plate is walked around square steel tube wall, and fixes by high-strength bolt with the i shaped steel web of post both sides.
2. Concrete-Filled Square Steel Tube as claimed in claim 1 and the semi-rigid reinforcing joint of girder steel progressive collapse-resisting, is characterized in that, described U-shaped steel junction plate is guaranteeing under the prerequisite of enough bonding strengths, by the part excision at its middle part.
3. Concrete-Filled Square Steel Tube as claimed in claim 1 or 2 and the semi-rigid reinforcing joint of girder steel progressive collapse-resisting, is characterized in that, described U-shaped steel junction plate and concrete-filled steel square tubular column wall adopt fillet weld seam, fix by high-strength bolt with steel beam web plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310519227.2A CN103526950A (en) | 2013-10-29 | 2013-10-29 | Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310519227.2A CN103526950A (en) | 2013-10-29 | 2013-10-29 | Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse |
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| CN103526950A true CN103526950A (en) | 2014-01-22 |
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| CN201310519227.2A Pending CN103526950A (en) | 2013-10-29 | 2013-10-29 | Concrete-filled square steel tube and steel beam semi-rigid reinforcing joint for preventing progressive collapse |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888286A (en) * | 2016-05-12 | 2016-08-24 | 中国矿业大学 | Method for reinforcing steel pipe joints by upward movement of groove-shaped collar plate |
| CN106939706A (en) * | 2017-05-19 | 2017-07-11 | 沈阳建筑大学 | A kind of anti-fall reinforcing beam-column node structure that collapses |
| CN107217744A (en) * | 2017-06-23 | 2017-09-29 | 东南大学 | Edge of a wing friction-type shape-memory alloy rod Self-resetting steel-frame beam king post joint |
| CN111021538A (en) * | 2019-12-30 | 2020-04-17 | 北京京盛泰华金属结构有限公司 | Construction method of connection structure of unequal-height steel beams |
-
2013
- 2013-10-29 CN CN201310519227.2A patent/CN103526950A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105888286A (en) * | 2016-05-12 | 2016-08-24 | 中国矿业大学 | Method for reinforcing steel pipe joints by upward movement of groove-shaped collar plate |
| CN105888286B (en) * | 2016-05-12 | 2018-07-27 | 中国矿业大学 | A kind of method that groove profile collar extension plate moves up reinforcement Steel Tube Joint |
| CN106939706A (en) * | 2017-05-19 | 2017-07-11 | 沈阳建筑大学 | A kind of anti-fall reinforcing beam-column node structure that collapses |
| CN107217744A (en) * | 2017-06-23 | 2017-09-29 | 东南大学 | Edge of a wing friction-type shape-memory alloy rod Self-resetting steel-frame beam king post joint |
| CN111021538A (en) * | 2019-12-30 | 2020-04-17 | 北京京盛泰华金属结构有限公司 | Construction method of connection structure of unequal-height steel beams |
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Application publication date: 20140122 |