CN203716404U

CN203716404U - Stiffened circular multiple-pore steel beam

Info

Publication number: CN203716404U
Application number: CN201320807657.XU
Authority: CN
Inventors: 范国利; 李庆中
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-12-11
Filing date: 2013-12-11
Publication date: 2014-07-16
Anticipated expiration: 2023-12-11

Abstract

The utility model discloses a stiffened circular multiple-pore steel beam. The stiffened circular multiple-pore steel beam comprises a plurality of circular multiple-pore steel beams and a plurality of steel pipes, wherein the quantity of the steel pipes is equal to that of the circular pore of each circular multiple-pore steel beam, the steel pipes are transversely arranged within the circular pores of the steel beams, the distances between the left and right sides of steel beam webs from which the steel pipes extend are equal, the outer diameter of each steel pipe is slightly less than the diameter of each circular pore, and the steel pipes and the circular pores are welded along the periphery at the left side face and the right side face of each steel beam web.The stiffened circular multiple-pore steel beam has the advantages that 1, the influence that the plane outer stability of the steel beam is changed compared with a common solid-wed steel beam caused by the heightening of the beam height and the poring of the web can be effectively eliminated, so that the computation of the multiple-pore steel beam more strictly observes and obeys the plane-assumed basic specification; 2, after the multiple-pore steel beam is stiffened by the steel pipes, the phenomenon that the multiple-pore firstly generates the buckling along the periphery or the happening of the limit fail form of tension fracture under the condition that the circular pores of the steel beam are complexly forced can be effectively avoided, and the multiple-pore is obvious in arch effect.

Description

The multiple hole of a kind of circle of putting more energy into girder steel

Technical field

The utility model relates to the multiple hole of a kind of novel circle girder steel, and it can further expand the scope of application in the structural steelwork fields such as building, bridge.

Background technology

Circular multiple hole girder steel is with respect to solid web girder, its gastropore place moment of inertia, real abdomen place moment of inertia all improve a lot, circular multiple hole girder steel is the multiple hole beam type of every main performance optimum in the empty girder steel series of products of abdomen, but because it is to be based upon on plane supposition basis, along with increase and the web perforate of girder steel deck-molding, in fact multiple hole girder steel can change to some extent at the more common real abdomen girder steel of Out-of-plane Stability; The round hole of circular multiple hole girder steel is cutting edge, although there is no the on the corner concentrated defect of stress of polygon perforate, but still exist under complex loading conditions, first gastropore produces the limit mode of failure of flexing or drawing crack along circumference; Bridge pier between circular multiple hole is the significant points that connects upper and lower T-steel beam part, although the natural axis position of this part in girder steel, the influence of shear force of horizontal direction still exists, and particularly selecting narrow width bridge pier, (W is bridge pier width, W=0.25h _o) in situation, the stability of bridge pier part still needs emphasis to pay attention to.

Summary of the invention

Problem to be solved in the utility model is to provide the multiple hole of a kind of Novel circular of putting more energy in circular hole girder steel, and its every main performance is equivalent to real abdomen girder steel, thereby overcomes the defect proposing in background technology.

The multiple hole of this novel a kind of circle of putting more energy into girder steel, it comprises the multiple hole of some circles girder steel, steel pipe, the quantity of steel pipe equates with the quantity of the circular hole of the multiple hole of every circle girder steel, steel pipe transverse is arranged in the circular hole of girder steel, its distance of stretching out the steel beam web plate left and right sides equates, the external diameter of steel pipe is slightly less than the aperture of circular hole, steel pipe and circular hole in the left and right sides of steel beam web plate along circumference soldering.

The multiple hole of this novel circle of putting more energy into girder steel, there is following advantage: 1, can effectively eliminate the impact changing to some extent at the more common real abdomen girder steel of Out-of-plane Stability because of the girder steel that deck-molding increases and web perforate causes, make multiple hole girder steel calculate the basic regulations that more strictly observes and obey plane supposition; 2, circular multiple hole girder steel, by after pipe stiffener, can effectively avoid the round hole of girder steel under complex loading conditions, and first gastropore produces the generation of the limit mode of failure of flexing or drawing crack along circumference, and the circular arch effect of gastropore is obvious; 3, the ability of the anti-horizontal direction shearing of bridge pier between multiple hole improves, and the stability of bridge pier part is further improved.

This Novel steel beam adds steel pipe in the circular gastropore of the multiple hole of standard circular girder steel, further improves integral rigidity and the intensity of girder steel; In addition, need to carry out the design of underbelly hole in girder steel product design or by reality use time (pressure zone web free margins is bigger than normal), as Stability Checking does not meet, also can put more energy into the multiple hole of circle by said method, reach the requirement that meets stability after putting more energy into.

Brief description of the drawings

Fig. 1 is that the multiple hole of single circle girder steel adds the schematic diagram after steel pipe;

Fig. 2 is the sectional view along A-A line in Fig. 1;

Fig. 3 is the sectional view along B-B line in Fig. 1;

Fig. 4 is the sectional view along C-C line in Fig. 1;

Fig. 5 is that the multiple hole of many circles girder steel adds the schematic diagram after steel pipe;

Fig. 6 is the sectional view along D-D line in Fig. 5;

Fig. 7 is the sectional view along E-E line in Fig. 5;

Fig. 8 is the sectional view along F-F line in Fig. 5.

Detailed description of the invention

From Fig. 1, Fig. 2, Fig. 3, Fig. 4, the multiple hole of this novel a kind of circle of putting more energy into girder steel, it comprises the multiple hole of some circles girder steel 1, steel pipe 2, the quantity of steel pipe 2 equates with the quantity of the circular hole of the multiple hole of every circle girder steel 1, steel pipe 2 is horizontally installed in the circular hole of girder steel 1, its distance of stretching out the girder steel 1 web left and right sides equates, the external diameter of steel pipe 2 is slightly less than the aperture of circular hole, steel pipe and circular hole in the left and right sides of steel beam web plate along circumference soldering.Wherein, the thickness of steel pipe=(0.5-0.8) t ₁(t ₁for the gastropore thickness of single beam).Here, the thickness of steel pipe also can be according to calculative determination.

In the time that the multiple hole of circle girder steel is one, the length=3t of steel pipe ₁(t ₁for the gastropore thickness of single beam).The multiple hole of this novel single circle of putting more energy into girder steel, there is following advantage: 1, can effectively eliminate the impact changing to some extent at the more common real abdomen girder steel of Out-of-plane Stability because of the girder steel that deck-molding increases and web perforate causes, make multiple hole girder steel calculate the basic regulations that more strictly observes and obey plane supposition; 2, circular multiple hole girder steel, by after pipe stiffener, can effectively avoid the round hole of girder steel under complex loading conditions, and first gastropore produces the generation of the limit mode of failure of flexing or drawing crack along circumference, and the circular arch effect of gastropore is obvious; 3, the ability of the anti-horizontal direction shearing of bridge pier between multiple hole improves, and the stability of bridge pier part is further improved.

In addition, single multiple hole girder steel is along with the increase of deck-molding, while reaching the limit of, its application span and bearing capacity also reach the limit of thereupon, how to continue to improve the supporting capacity of girder steel, vertical deck-molding direction expands girder steel lifting surface area, and the supporting capacity that adopts compound beam can further realize girder steel improves; The width of the real abdomen girder steel of hot rolling is subject to the restriction of rolling equipment, and current maximum girder steel width is limited in 300mm, and along with the increase of deck-molding, deck-siding needs corresponding expansion; Never have at present good way and how current single girder steel is combined to form compound girder steel.

In order to address the above problem, from Fig. 5, Fig. 6, Fig. 7, Fig. 8, as this novel a kind of improved procedure, in the time that the multiple hole of circle girder steel is two, the length=single-beam of steel pipe is wide+3t ₁(t ₁for the gastropore thickness of single beam), the joint downhand welding of upper bottom flange.Like this when circular multiple hole girder steel is by being connected to form after compound beam of steel pipe, because vertical deck-molding direction has expanded girder steel actual loading area, the supporting capacity of girder steel further improves; Meanwhile, circular multiple hole girder steel compound beam has been broken through the real abdomen girder steel of hot rolling width and has been subject to the restriction of rolling equipment, and compound beam width can further extend to 400mm, 500mm, 600mm, greatly widen specification limit and the scope of application of wide width wing girder steel.Circular multiple hole girder steel compound beam has been realized single girder steel and has been combined to form the breakthrough of compound girder steel, and combined girder steel recombinant, can form shaped steel combination plate-girder, realizes the application innovation of bridge steel structure aspect.

Certainly, this is novel can also be generalized to three above girder steels, and when circular multiple hole girder steel during at least three () when n>=the 3, the single-beam of the length of steel pipe=(n-1) is wide+3t ₁(t ₁for the gastropore thickness of single beam), the joint downhand welding of upper bottom flange.

The multiple hole of this novel circle of putting more energy into girder steel holistic resistant behavior is good, and entirety and local stability all obviously improve.This product design method is to use how much and mechanical foundation theory, further extends using skill to applied technical field, and by the more recent application method for designing after network analysis girder steel formation method and optimization.

Claims

1. the multiple hole of the circle of a putting more energy into girder steel, it is characterized in that: it comprises the multiple hole girder steel (1) of some circles, steel pipe (2), the quantity of steel pipe (2) equates with the quantity of the circular hole of the multiple hole girder steel (1) of every circle, steel pipe (2) is horizontally installed in the circular hole of girder steel (1), its distance of stretching out girder steel (1) the web left and right sides equates, the external diameter of steel pipe (2) is slightly less than the aperture of circular hole, steel pipe and circular hole in the left and right sides of steel beam web plate along circumference soldering.

2. the multiple hole of circle according to claim 1 girder steel, is characterized in that: thickness=(0.8-1.0) t of steel pipe ₁, t ₁for the gastropore thickness of single beam.

3. the multiple hole of circle according to claim 1 girder steel, is characterized in that: in the time that the multiple hole of circle girder steel is one, and the length=3t of steel pipe ₁, t ₁for the gastropore thickness of single beam.

4. the multiple hole of circle according to claim 1 girder steel, is characterized in that: in the time that the multiple hole of circle girder steel is two, the length=single-beam of steel pipe is wide+and 3t ₁, t ₁for the gastropore thickness of single beam, the joint downhand welding of upper bottom flange.

5. the multiple hole of circle according to claim 1 girder steel, is characterized in that: when the multiple hole of circle girder steel during at least three () when n>=the 3, the single-beam of the length of steel pipe=(n-1) is wide+and 3t ₁, t ₁for the gastropore thickness of single beam, the joint downhand welding of upper bottom flange.