KR101766429B1 - Steel pipe truss and construction method of truss bridge using the same - Google Patents

Abstract

The present invention relates to a steel pipe truss and a construction method of a truss bridge using the same. A joint part is able to easily be treated when a steel pipe truss is produced, wherein excellent structural function is ensured, and a coupling angle of a slope material is able to be adjusted. The steel pipe truss of the present invention comprises: a lower chord member and an upper chord member respectively made of steel pipes; a gusset plate coupled in a longitudinal direction with a joint position of a bottom of the upper chord member and a top of the lower chord member; and a slope material coupled to be inclined with the gusset plate having both ends respectively coupled with the upper chord member and the lower chord member. A pair of insertion grooves are respectively cut and formed on both ends of the slope material to make the gusset plate inserted into the insertion grooves. The insertion grooves and the gusset plate are welded to be fixated. The both ends of the slope material are formed to have curvatures corresponding to the curvatures of the upper chord member and the lower chord member, and are welded to be fixated by being closely placed on the outer circumferential surfaces of the upper chord member and the lower chord member. A guide plate is closely coupled with any one or more of the lower chord member and the upper chord member to have a width which is the same as the inner diameter of the slope material have an adjustable angle, and to serve as a back piece which guides a coupling angle of the slope material by being inserted into an end of the slope material preventing leakage of a welding convex part to a welding root gap of the insertion grooves and the gusset plate. A rotation central hole and an angle adjustment hole which is an arc-shaped long hole are penetrated through the guide plate. Fixing holes are formed on positions respectively corresponding to the rotation central hole and the angle adjustment hole of the gusset plate, and bolts are penetrated therethrough to be coupled.

Description

TECHNICAL FIELD The present invention relates to a steel pipe truss and a construction method of a truss bridge using the steel pipe truss,

In the present invention, when manufacturing a steel tube truss, the workpiece can be tightly coupled to the present and the axial force can be clearly transmitted through the joint, and the guide plate coupled to both sides of the gusset plate can be tightly coupled to the inside of the workpiece. And a method of constructing a truss bridge using the same.

The truss structure is a structure in which straight members such as top, bottom, top and bottom are continuously connected in a triangular shape in one plane.

The truss structure is designed to resist bending moment due to axial tensile and compression of the member and to resist shear force at the joints. The truss structure is advantageous because it has higher section efficiency than other general structures and therefore requires less amount of steel and less weight. It is advantageous to apply.

The main member of such a truss structure mainly uses a round steel pipe.

The circular steel pipe is advantageous in buckling and twisting because the strong axis and the weak axis are not separated. On the other hand, due to the feature of the cross-sectional shape, the joining process with other members is very difficult. In particular, steel pipe trusses are subject to complicated joint details for stress transmission at the current and stressed joints where stresses are concentrated.

In addition, the steel pipe truss combines materials at the bottom (or current) at the time of fabrication, and then combines the top (or bottom) current with the other end of the materials with one end fixed at the bottom.

However, if the joining angles of the materials bonded to the bottom current are not correct, the current fixing may be difficult. In addition, when joining a workpiece with a gusset plate combined with a lower or present phase, the position of the workpiece must be fixed at two points before welding is possible.

KR 10-0582230 B1

In order to solve the above problems, it is an object of the present invention to provide a steel pipe truss which is simple in the detail of joining parts of the steel pipe truss and is reliable in stress transmission and easy to install, and a method of constructing a truss bridge using the same.

The present invention provides a steel pipe truss which can accurately fix and fix the joining angle of workpieces, and a method of constructing a truss bridge using the same.

According to a preferred embodiment of the present invention, there is provided a gusset plate which is longitudinally coupled to an upper joint position of a lower end current and an upper end current, Wherein a pair of insertion grooves are formed at both ends of the workpiece so that the gusset plate is inserted into the insertion groove, and the insertion groove and the gusset plate And both ends of the workpiece are formed of curvatures corresponding to the curvatures of the upper and lower currents respectively and are fixed by welding to the outer circumferential surfaces of the upper and lower currents respectively and fixed by welding, At least one or more of the gusset plates to which the workpiece is coupled are provided on both sides of the gusset plate with the same inner diameter And a guide plate inserted into the end portion of the workpiece to guide the joining angle of the workpiece and serve as a backing material for preventing the welded portion from leaking between the insertion groove and the welding root gap of the gusset plate, The guide plate is formed with a rotation center hole and an arc-shaped angle adjusting hole passing through the gusset plate, and a fixing hole is formed in the gusset plate at a position corresponding to the rotation center hole and the angle adjusting hole, Steel pipe truss is provided.

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According to another preferred embodiment of the present invention, a pair of guide plates coupled to both sides of the gusset plate are integrally formed by connecting the outer ends of the pair of guide plates.

According to another preferred embodiment of the present invention, there is provided a truss bridge construction method using the steel pipe truss, wherein (a) a plurality of gusset plates are separated from each other by a predetermined distance in the longitudinal direction Welded to each other; (b) coupling the guide plate to both sides of the gusset plate coupled to the lower end by adjusting the angle to correspond to the engagement angle of the workpiece; (c) a guide plate coupled to the lower gusset plate is inserted into the one end, the gusset plate is inserted into the insertion groove, and one end of the guide plate is engaged with each gusset plate ; (d) welding between the insert groove and the gusset plate coupled to the lower end and between the outer periphery of one end of the workpiece and the lower end of the workpiece; (e) a gusset plate coupled to the upper end of the workpiece is inserted into the insertion groove of the workpiece, and the other end of the workpiece coupled to the lower end of the workpiece is engaged with the gusset plate coupled to the upper end of the workpiece, ; (f) completing the steel tube truss by welding between the insertion groove and the gusset plate coupled to the top current and between the other end and the current outer circumferential surface of the workpiece; And (g) mounting the steel tube truss to a pier or alternate top; The present invention provides a method of constructing a truss bridge using a steel pipe truss.

The present invention has the following effects.

First, when manufacturing the steel tube truss, the axial force can be clearly transmitted through the joint by welding both ends of the work in close contact so as to abut against the outer circumferential face of the upper and lower sides. Therefore, the structural performance is excellent and the construction is easy.

Second, a guide plate for guiding the joining angle of the workpiece is coupled to both side surfaces of the gusset plate to closely contact the inside of the workpiece, whereby the joining angle of the workpiece can be precisely controlled. Accordingly, since one end of the workpiece is fixed to the gusset plate by the guide plate, welding work of the workpiece can be carried out even if the workpiece is fixed at only one other point.

Third, the side end of the guide plate can serve as a backing damper which blocks the gap between the welding grooves formed between the insertion groove formed in the end of the workpiece and the gusset plate. Accordingly, it is possible to prevent the welding flesh from leaking, thereby minimizing the welding amount and improving the welding quality.

1 is a perspective view showing a steel pipe truss of the present invention.
2 is a perspective view showing a coupling relationship between a workpiece, a gusset plate, and a guide plate according to an embodiment.
3 is a side view showing a coupling relationship between a workpiece, a gusset plate, and a guide plate according to an embodiment;
Fig. 4 is a side view showing a coupling relationship between a workpiece, a gusset plate, and a guide plate according to another embodiment; Fig.
5 is a cross-sectional view taken along line A-A 'in Fig.
6 is a cross-sectional view showing a guide plate whose side ends are chamfered in an arc shape;
Fig. 7 is a perspective view showing a coupling relationship between the gusset plate and the guide plate; Fig.
8 is a perspective view showing an embodiment of a guide plate;
9 is a perspective view showing a part of a process of a truss bridge construction method using a steel pipe truss according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

FIG. 1 is a perspective view showing a steel pipe truss according to an embodiment of the present invention, FIG. 2 is a perspective view showing a coupling relation between a workpiece, a gusset plate, and a guide plate according to an embodiment, Fig. 8 is a side view showing the coupling relationship of the guide plate. Fig.

FIG. 5 is a cross-sectional view taken along line A-A 'of FIG. 1; FIG. 5 is a side view showing a coupling relationship between a workpiece, a gusset plate, and a guide plate according to another embodiment;

1 to 3, the steel tube truss according to the present invention includes upper and lower ends 11 and 12 of steel pipes, upper and lower joints 11 and 12 of the upper and lower phases 12, A gusset plate 13 which is coupled in the longitudinal direction to the gusset plate 13 coupled to the gusset plate 13 at both ends of the upper current 12 and the lower current 11, A pair of insertion grooves 141 are formed at both ends of the workpiece 14 so that the insertion grooves 141 are inserted into the insertion grooves 141. The insertion grooves 141 and the gusset plates 13 are fixed by welding W and both ends of the work 14 are formed with curvatures corresponding to the curvatures of the phase current 12 and the bottom current 11, Is fixed to the outer circumferential surface of the current (11) by welding (W), and at least one of the lower current (11) and the upper current (12) At least one of the gusset plates 13 to which the workpiece 14 is coupled has a width equal to the inner diameter of the workpiece 14 and is inserted into the end of the workpiece 14, And a guide plate (15) serving as a backing material for preventing weld leaking between the insertion groove (141) and the welding route gap of the gusset plate (13) is tightly engaged with the guide groove.

The steel tube truss according to the present invention is composed of a lower elevation 11, an upper elevation 12, a gusset plate 13 and a work 14.

The lower current 11 and the upper current 12 are arranged to be spaced apart from each other by a predetermined distance.

The gusset plate 13 is coupled to the lower portion of the phase current 12 and the upper portion of the lower current 11, respectively.

The gusset plate 13 is coupled to a node position where the phase current 12 and the workpiece 14 or the bottom current 11 and the workpiece 14 meet, Are coupled along the longitudinal direction.

The gusset plate 13 coupled to the phase current 12 and the gusset plate 13 coupled to the bottom current 11 can be arranged so that the workpiece 14 is not collinearly positioned so that it can be inclined.

The workpiece 14 is coupled to a gusset plate 13 having both ends connected to the upper current 12 and the lower current 11, respectively.

A pair of insertion grooves 141 are formed at both ends of the workpiece 14 so that the insertion grooves 141 are inserted into the insertion grooves 141. The insertion grooves 141 and the gusset plates 13 are fixed to each other by welding (W). The both ends of the work 14 are formed with curvatures corresponding to the curvatures of the upper and lower halves 12 and 11 so as to be in close contact with the outer circumferences of the upper and lower halves 11 and 11, ).

A pair of insertion grooves 141 are formed at one end and the other end of the workpiece 14, respectively.

The gusset plate 13 can be inserted and inserted into the insertion groove 141 formed at the end of the workpiece 14 so that the workpiece 14 can be directly coupled to the gusset plate 13, It is easy.

By forming the end curvature of the workpiece 14 to correspond to the curvature of the upper current 12 or the lower curvature 11, both ends of the work 14 can be directly connected to the upper current 12 and the lower current 11, So that they can be tightly coupled with each other.

By welding and fixing between the insertion groove 141 of the workpiece 14 and the gusset plate 13 and between the end of the workpiece 14 and the upper end 12 or lower end 11, And can be clearly transmitted through the nodal portion, which is excellent in structural performance.

A pair of insertion grooves 141 formed at both ends of the workpiece 14 are formed to face each other. The insertion grooves 141 formed at one end and the other end of the workpiece 14 are preferably symmetrical with respect to each other so that the gusset plate 13 is coupled to the center of the workpiece 14.

The width of the insertion groove 141 formed at the end of the workpiece 14 may be formed to be slightly larger than the thickness of the gusset plate 13 for facilitating the engagement of the workpiece 14 and the gusset plate 13. [

A guide plate 15 having the same width as the inner diameter of the workpiece 14 is coupled to both sides of the gusset plate 13.

The guide plate 15 is rotatably and tightly coupled to the gusset plate 13 to adjust a rotation angle thereof.

The guide plate 15 is inserted inside the end portion of the workpiece 14 to guide the joining angle of the workpiece 14. Accordingly, the joining angle of the work piece 14 can be precisely adjusted and fixed to the gusset plate 13. Since one end of the work 14 is temporarily fixed to the gusset plate 13 by the guide plate 15 during the welding operation, even if the work 14 is fixed at only one other point, The welding operation of the welding is possible.

As described above, in the present invention, there is no constitution in which the joint portion of the member is exposed to the outside of the joint portion at the time of manufacturing the steel pipe truss. Therefore, it does not interfere with the welding operation.

2, 3 and so on, the outer end of the guide plate 15 can be chamfered on both sides in the width direction so as to be easily inserted into the workpiece 14.

As described above, the width of the insertion groove 141 formed at the end of the workpiece 14 may be larger than the thickness of the gusset plate 13 for ease of engagement. However, in this case, there is a problem that the amount of welding work is increased and welding quality is deteriorated due to leakage of welding fumes between the root gaps between the insertion groove 141 and the gusset plate 13.

5, the guide plate 15 is provided with a back strip which blocks the gap between the welding groove 141 and the welding root gap of the gusset plate 13 at the inner side of the work 14, ) Can play a role. Accordingly, it is possible to prevent the welding flesh from leaking, thereby minimizing the welding amount and improving the welding quality.

In manufacturing the steel tube truss of the present invention, the gusset plate 13 is welded in the longitudinal direction of the lower plate 11 to the upper portion of the lower plate 11 (or the upper plate 12) Thereby fixing the guide plate 15 to the gusset plate 13.

Next, the gusset plate 13 is inserted into the insertion groove 141 of the workpiece 14, and the guide plate 15 is engaged with the workpiece 14 so as to be inserted into the end of the workpiece 14. At this time, one end of the workpiece 14 is brought into close contact with the outer circumferential surface of the bottom end 11.

Thereafter, the welding can be performed in the order of welding between the insertion groove 141 of the workpiece 14 and the guide plate 15, and welding between one end of the workpiece 14 and the outer peripheral surface of the lower end 11.

As shown in FIG. 3, the entire area of the guide plate 15 can be located on the side surface of the gusset plate 13. 4, one end of the guide plate 15 is protruded to the outside of the gusset plate 13, so that the gusset plate 13 is inserted into the insertion groove 141 of the workpiece 14 The joining angle of the workpiece 14 can be adjusted beforehand.

6 is a cross-sectional view showing a guide plate whose side ends are chamfered in an arc shape.

6, the side ends of the guide plates 15, which meet the inner circumferential surface of the workpiece 14, are chamfered in an arc shape corresponding to the curvature of the inner circumferential surface of the workpiece 14, Of the inner circumferential surface of the base member.

7 is a perspective view showing a coupling relationship between the gusset plate and the guide plate.

7, a rotation center hole 151 and an angle adjustment hole 152 are formed in the guide plate 15, and the rotation center hole 151 and the angle adjustment hole 152 are formed in the gusset plate 13, Fixing holes 131 and 132 are formed at positions corresponding to the holes 152 so that the bolts 16 are inserted into the holes 152. The angle adjusting holes 152 may be formed as arc-shaped slots.

The guide plate 15 may be fixed to the gusset plate 13 by welding after the angle adjustment but may be configured to facilitate angle adjustment and position fixing by coupling to the gusset plate 13 by two bolts 16 have.

The bolt 16 fastened to the rotation center hole 151 of the guide plate 15 serves as a hinge shaft which serves as a rotation center of the guide plate 15. [

The angle of the guide plate 15 can be adjusted while the guide plate 15 is rotated with respect to the rotation center hole 151 which is the hinge axis because the angle adjusting hole 152 is formed as a long hole.

The bolt 16 fastened to the angle adjusting hole 152 serves to fix the position of the guide plate 15 after the angle adjustment of the guide plate 15 is completed.

Each of the bolts 16 is fastened to the guide plate 15 on both sides of the gusset plate 13 at the same time.

8 is a perspective view showing an embodiment of the guide plate.

As shown in FIG. 8, a pair of guide plates 15 coupled to both sides of the gusset plate 13 may be integrally formed by connecting outer ends thereof by a connection part 153.

That is, the pair of guide plates 15 may be integrally connected by a connecting portion 153 and have a C-shaped cross section.

Accordingly, since the guide plates 15 on both sides of the gusset plate 13 can be simultaneously rotated at the same angle, the rotation angle of the guide plate 15 can be easily adjusted. In addition, the number of required materials is reduced, which is easy to manage.

9 is a perspective view showing a part of a process of a truss bridge construction method using a steel pipe truss according to the present invention.

The method of constructing a truss bridge using a steel pipe truss according to the present invention relates to a method of constructing a truss bridge using the steel pipe truss as described above with reference to FIGS.

In the method of constructing a truss bridge using a steel pipe truss according to the present invention, a plurality of gusset plates 13 are arranged at (a) a lower end 11 and an upper end 12, respectively, (W) so as to be spaced apart from each other by a predetermined distance in the direction of the arrow.

9 (a), the angle of the guide plate 15 is adjusted to correspond to the angle of engagement of the workpiece 14, so that the gusset plate 13 (C) a guide plate 15 coupled to the gusset plate 13 of the lower case 11 is inserted into one end, and the gusset plate 13 is inserted into the insertion groove 141, (D) is inserted into the insertion groove 141 and the lower end 11 of the lower case 11, after the ends 14 are inserted into the respective gusset plates 13 of the lower case 11, (W) between the one end of the work piece 14 and the outer circumferential surface of the lower end 11.

9 (b), the gusset plate 13 coupled to the phase current 12 is inserted into the insertion groove 141 of the workpiece 14, and the other end of the workpiece 14 is inserted Engaging the other end of the work 14 coupled to the lower end 11 to the gusset plate 13 coupled to the upper end 12 so as to abut the outer circumferential surface of the upper end 12, And between the other end of the work piece 14 and the outer circumferential surface of the upper current 12 between the gusset plate 13 coupled to the phase current 12 and the gusset plate 13 joined to the phase current 12 to complete the steel pipe truss.

That is, in the method of constructing the truss bridge using the steel pipe truss according to the present invention, the slabs 14 are first joined to the bottom slab 11, and then the slabs 14 are joined to the slab bottom 11, To the other end of the workpiece (14).

At this time, the guide plate 15 may be coupled to the gusset plate 13 coupled to the phase current 12, or may be omitted.

However, when the guide plate 15 is coupled to the gusset plate 13 coupled to the phase current 12, it may be difficult to fasten the workpiece 14 in a state where the guide plate 15 is fixed.

Therefore, it is preferable to form the rotation center hole 151 in the guide plate 15 so that the guide plate 15 is freely rotatable. The guide plate 15 prevents the position of the phase current 12 from shifting before fixing the phase current 12 and the workpiece 14 and acts as a back damper when welding.

Finally, (g) the steel tube truss is mounted on a pier or alternate top to finish.

11: Low current
12: Award current
13: Gusset plate
131, 132: Fixed ball
14: Materials
141: insertion groove
15: guide plate
151: center of rotation
152: Angle adjustment ball
153: Connection
16: Bolt
W: Welding

Claims (4)

A gusset plate 13 which is longitudinally coupled to a lower joint 11 and an upper joint 12 of the steel pipe and an upper joint position of the lower and lower ends 11 of the upper joint 12, In a steel pipe truss composed of a work piece 14 slantedly joined to a gusset plate 13 coupled to an upper end current 12 and a lower end 11,
A pair of insertion grooves 141 are formed at both ends of the workpiece 14 so that the insertion grooves 141 are inserted into the insertion grooves 141. The insertion grooves 141 and the gusset plates 13 are fixed by welding W,
Both ends of the workpiece 14 are formed with a curvature corresponding to the curvature of the upper current 12 and the lower current 11 so as to be in close contact with the outer circumferential surface of the upper current 12 and the lower current 11, Respectively,
At both sides of the gusset plate 13 to which the workpiece 14 is coupled at least in at least one of the lower end 11 and the upper end 12 has the same width as the inner diameter of the workpiece 14, A guide plate 15 inserted in an end portion of the guide plate 14 guides the joining angle of the workpiece 14 and serves as a backing material for preventing welded leaks between the insertion groove 141 and the welding root gap of the gusset plate 13 And is tightly coupled so as to be adjustable in angle,
The guide plate 15 is formed with a rotation center hole 151 and an angular adjustment hole 152 having a circular arc shape and the gusset plate 13 is provided with the rotation center hole 151 and the angle adjusting hole 152 And fixing bolts (131, 132) are formed at positions corresponding to the bolts (16).
delete The method of claim 1,
Wherein a pair of guide plates (15) coupled to both sides of the gusset plate (13) are integrally connected by connecting portions (153) at outer ends thereof.
A method of constructing a truss bridge using a steel pipe truss according to claim 1 or 3,
(a) A plurality of gusset plates 13 are welded (W) so as to be spaced apart from each other by a predetermined distance in the longitudinal direction of the lower current 11 and the upper current 12 at the lower current 11 and the upper current 12, ;
(b) coupling the guide plate (15) to both sides of the gusset plate (13) coupled to the lower case (11) by adjusting the angle so as to correspond to the engagement angle of the workpiece (14);
(c) a guide plate 15 coupled to the gusset plate 13 of the lower case 11 is inserted into one end, the gusset plate 13 is inserted into the insertion groove 141, (14) to each gusset plate (13) of the lower case (11) so as to abut the outer circumferential surface of the lower case (11);
(d) welding (W) between the insert groove (141) and the gusset plate (13) coupled to the lower end (11) and between the end of the workpiece (14) and the outer circumferential surface of the lower end (11);
(e) The gusset plate 13 coupled to the phase current 12 is inserted into the insertion groove 141 of the workpiece 14, and the other end of the workpiece 14 is brought into contact with the upper surface 12 Coupling the other end of the workpiece (14) coupled to the lower end (11) to a gusset plate (13) coupled to the current (12);
(f) Welding (W) between the insertion groove 141 and the gusset plate 13 coupled to the upper current 12 and between the other end of the work 14 and the outer circumferential surface of the upper current 12 to complete the steel pipe truss ; And
(g) mounting the steel tube truss to a pier or alternate top; The method for constructing a truss bridge using a steel pipe truss.

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