KR20110113444A - Joint unit structure of pipe truss for temporary assembly and method constructing the truss bridge with it - Google Patents
Joint unit structure of pipe truss for temporary assembly and method constructing the truss bridge with it Download PDFInfo
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- KR20110113444A KR20110113444A KR1020100032834A KR20100032834A KR20110113444A KR 20110113444 A KR20110113444 A KR 20110113444A KR 1020100032834 A KR1020100032834 A KR 1020100032834A KR 20100032834 A KR20100032834 A KR 20100032834A KR 20110113444 A KR20110113444 A KR 20110113444A
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- truss
- connecting branch
- unit structure
- joint unit
- vertical
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
- E01D2101/285—Composite prestressed concrete-metal
Abstract
The present invention has a first object of enabling the temporary assembly of the truss member by the joint unit structure and at the same time the temporary structure of the truss member is simple, and the welding is easily and accurately made by welding in the preassembled state. The second purpose is to make the truss member in the assembled state, and the third object is to make it easy to manufacture the correct truss structure by checking and correcting whether the plane formed by the truss member is the correct plane in place. The fourth purpose is to make the construction of the truss bridge efficient and economical by easily welding and manufacturing the truss structure in the state.
The structure of the joint unit structure is the unit structure body 22 and the truss member connecting branch 23 is formed integrally, the connecting ring 24 is inserted into the truss member connecting branch 23, the connecting ring 24 It is possible to shed as much as S toward the truss member connecting branch 23, and the configuration is such that the temporary assembly of the truss member by the connecting ring 24 protruded by S.
According to the present invention configured as described above, the truss structure is welded in a state in which the truss structure is preassembled by the joint unit structure, and thus the truss structure is stable and the welding is excellent because the precise truss structure of the preassembled state is maintained as it is. In addition, the production of the truss structure is an efficient and economical useful invention.
Description
The present invention relates to a pipe truss joint unit structure that can be temporarily assembled and a method of constructing a pipe truss bridge using the same.
More specifically, in welding the node of the truss member, the assembly of the truss member is possible by the joint unit structure, which facilitates welding of the node of the truss structure in the preassembled state and the plane of the truss member in the preassembled state. The present invention relates to a pipe truss joint unit structure capable of assembling and enabling a pipe truss bridge construction method using the same.
In the present invention, since the welding of the node part is made in the state in which the truss structure is assembled by the joint unit structure, the welding is easy and the truss structure after welding is stable because the truss structure accurately confirmed and corrected in the provisional assembly state is maintained as it is. The welding is precise and the quality is excellent.
In particular, since the truss structure of the preassembled state by the joint unit structure is stable, welding can be performed at multiple locations at the nodal part of the truss structure simultaneously, thus solving the problem of the conventional welding of the truss bridge. It is a useful technology for the construction technology of truss bridge which is reduced.
Bridge structures mainly used for the construction of bridges with a distance of about 50m include PSC box girder bridge, steel composite plate girder bridge, steel composite box girder bridge, and steel composite truss bridge.
The steel composite box girder bridge is a structural type that solves the problems of weight of PSC box girder and technical problems related to it, and also solves the weakness of torsional rigidity and local buckling of the steel composite girder bridge. The girder bridge will be examined first, followed by the connection of the truss bridge and its associated nodes.
end. Steel Composite Box Girder Bridge
The steel composite box girder bridge with closed section is the most widely adopted bridge type because it has high torsional stiffness and high resistance to external forces in curved sections, and it is prefabricated at the factory, so it can be applied to all flat linear shapes such as single curve and spiral curve. .
However, it is vulnerable to local buckling due to its wide width to flange and abdominal plate. In order to prevent local buckling, the upper and lower flanges are provided with longitudinal ribs and lateral ribs, and the abdominal plate is provided with vertical stiffeners and horizontal stiffeners.
In addition, diaphragms are usually installed at intervals of 5 m to maintain the shape of the box cross section.
The steel weight of the longitudinal rib vertical horizontal stiffener diaphragm amounts to 30% of the total steel weight.
This is the main reason for the economic feasibility of the steel composite box girder bridge.
On the other hand, since the maximum sub-moment (-M max ) is generated at the internal point, the upper flange and the concrete slab which are in contact with the tensile stress are in contact. As such, the cross section formed by the upper flange and the concrete slab is a non-synthetic cross section.
On the other hand, since the maximum sub-moment (-M max ) is generated at the internal point, the upper flange and the concrete slab which are in contact with the tensile stress are in contact. As such, the cross section formed by the upper flange and the concrete slab at the inner point becomes a non-synthetic cross section.
In order for the upper flange and concrete slab to become a composite section, compressive stress must be applied to the upper flange. The behavior of the composite section is structurally stable and economical.
In contrast, non-synthetic cross sections are not only a cause of uneconomical design, but also a lateral crack in the point concrete slab due to minor moments, which promotes corrosion of reinforcing bars and drastically degrades durability.
I. Truss bridge
A) Truss structure
Truss is a structure in which a triangular shape is continuously connected and assembled by a linear member in one plane.
The linear members are called inclined members and vertical members. Upper and lower chords, the inclined members and the vertical members are main truss members forming a truss structure.
As shown in Fig. 1, the truss structure is not simple because the number of members that meet at one node is large.
In order to simplify the design and structural analysis of the truss structure, the following assumptions are made.
The connection of the truss member is connected with a pin so that all members transmit only axial force.
All loads and reaction forces are loaded at the truss nodes (or gaps).
All truss members are straight and the nodes are located at the intersections of the members.
The axial deformation of the truss is minute and does not affect the overall structure.
However, the actual truss bridge behavior does not satisfy this assumption, and the nodal connection between the members is also a bolt or welded connection, so the bending is transmitted.
B) Advantages of truss
Truss is a structural system consisting of only an axial tension member and an axial compression member. The structural analysis is simple due to the simple structure system.
Since the truss is a structure designed to resist bending moments and shear forces by axial tension members and axial compression members, the cross section efficiency (section force) is higher than that of any other structural type.
Truss has great rigidity and good wind-resistant safety. Recently, trusses are mainly used as reinforcement type of long bridges (eg Yeongjong bridge, Seto bridge, etc.).
Truss bridge is suitable for medium and long span bridges over 60m.
C) problems of truss
The first problem with trusses is that welding is difficult at the node where several members meet in one place.
According to Figure 1, the upper chord and two yarns meet at node A and the lower chord and two yarns at nodes B and C.
Fig. 1 shows the welding form at the node where the lower chord and two yarns meet.
According to Fig. 1, the yarn material is folded on the outer peripheral surface of the lower chord and the contact part is welded.
Since the node is where stress is concentrated, the interface between the lower chord and the sand is also subjected to intensive stress.
The joints of the lower chord and the livestock must be welded firmly into one body in close contact with each other. To cope with intensive stress.
Since the nodes are places where several members meet, the amount of welding is high, but it is more difficult to close all the members in particular.
On the contrary, when the contact portions are not close to each other and are far from each other, on the contrary, when the contact portions of the lower chord and the sand are not close to each other and far from each other, welding becomes inefficient and inefficient. In addition, the lack of support of the contact area is a bigger problem.
The second problem of the truss is that it is extremely difficult to cut the end shape of the yarn so that the circular yarn is closely connected to the circular lower chord.
Cutting the shape of the circular sandal edge to fit the circular lower chord is a time-consuming task.
In addition, when the number of nodes increases, cutting work is further weighted, which causes inefficiency.
The third problem with trusses is that it is not easy to prefabricate the connection of the members at the nodes.
Figure 1 shows a two-dimensional truss structure with continuous unit triangular structures.
The unit triangular structure is composed of, for example, three members-1, member-2, and member-3 connected to nodes A, B, and C, and the unit triangular forms the same plane.
The unit triangle associated with node B will be described.
Node B is where member-4, member-5, member-1, and member-2 are connected and at the same time unit triangle-1 with nodes D and E, unit triangle-2 with nodes E and A, Together with nodes A and C, they form a unit triangle-3.
Node B is only one vertex of each of the unit triangles of unit triangle-1, unit triangle-2, and unit triangle-3. In order for the three unit triangles to be coplanar, the other two vertices of each unit triangle must also be in place.
However, the other two vertices except node B (eg vertex A) constitute another unit triangle (unit triangle by A, C, F), so the unit triangle (unit triangle-1) formed by node B , -2, -3) and the unit triangle formed by A, the other vertex other than node B (unit triangle by A, C, F), are neither simple nor easy.
In this case, when two or more unit triangles located in the same plane are continuously connected to each other, the number of nodes is doubled, so that all of these unit triangles are connected on the same plane at the same time. Not to mention that it is more difficult.
Gusset plate structure
The gusset plate structure has a problem that it is not easy to drill the insert part that can accommodate the material, which is the problem of the welding method of Fig. 2, in the lower section of the circular section, ii) and the enormous time required for drilling and welding work. The structure that solved the problem to some extent.
As shown in Fig. 3, the gusset plate is a member that is welded and fixed to the longitudinal outer peripheral surface of the lower chord while facilitating connection and fixing of the yarn.
Gusset plate is a member that acts as a medium for transmitting the member force from the sand material to the lower chord.
The shape of the gusset plate is plate-shaped. In contrast, the shape of the lower chord is circular.
Since the shape of the gusset plate is plate-shaped, it is easy to fix the yarn to the gusset plate by bolting or welding.
The shape of the yarn is circular or the contact portion of the yarn which is in contact with the gusset plate is flat like a gusset plate. This is to facilitate the fixing of the gusset plate and yarn.
On the other hand, there is a problem that the stress concentration due to the cross-sectional change occurs in the gusset plate because the cross section of the yarn rapidly changes from circular to flat.
The gusset plate is over-designed for structural stability because its stress distribution is complicated and its structural analysis is not simple.
In the case of welding the sand material to the gusset plate, since the stress flow at the nodal part is very complicated, the thickness of the gusset plate is usually increased to stabilize the structure mechanically.
If the thickness of the gusset plate is increased, the upper and lower chords, which are connected to the gusset plate, must be designed to have a thickness greater than necessary, causing unreasonable overdesign.
In addition, when the sand material is fastened to the gusset plate by bolts, the effective area of the sand material becomes smaller as the cross-sectional area of the bolt hole, and thus the member force cannot be transmitted. There is a problem of being uneconomical.
On the other hand, since the gusset plate is concentrated in the local stress due to its structure, the gusset plate structure is rarely used in structures such as bridges that are heavily loaded, and is mainly used for building structures such as dome structures that are lightly loaded.
All. The salping problems above are summarized as follows.
Truss is a structure that resists bending moment and shear force by axial tension member and axial compressive member. Therefore, the truss has higher cross-sectional efficiency (section force) than any other structural type, which not only reduces steel volume but also has the advantage of high rigidity and wind resistance. Despite this, the connection and welding work at the node is not easy, so the economic benefits from the cross-sectional efficiency (section force) are not available.
In addition, in order to solve the problem of connection at the node as a flat gusset plate structure, the sanding part of the circular section corresponding to the flat gusset plate is also rapidly changed to the flat plate section, resulting in structural dynamics in which stress is concentrated in the gusset plate. There is also an uneconomical problem of using excessive amount of steel to reinforce the problem and stress concentration problem.
In addition, the problem of connection and welding work at the nodal part has been solved to some extent as a flat gusset plate structure. There is also an uneconomical problem of using excessive amount of steel to solve the problem of concentration and stress concentration.
The present invention has a first object of enabling the temporary assembly of the truss member by the joint unit structure and at the same time the temporary assembly of the truss member is simple.
The welding is performed in the preassembled state, and the second purpose is not only to make the welding easy but also to make the welding precise.
The third purpose is to make it easy to manufacture the correct truss structure by checking and correcting whether the plane formed by the truss member in the assembled state is the correct plane in place.
The fourth purpose is to make the construction of the truss bridge efficient and economical by easily welding and manufacturing the truss structure in the preassembled state.
By shortening the length of the joint unit structure so that the hands of the welding worker can easily touch the inside of the joint unit structure, it is possible to install a reinforcing plate for increasing rigidity inside the joint unit structure so that it is not exposed outside the joint unit structure. The fifth purpose is to make the appearance beautiful and tidy.
The basic construction of the pipe truss joint unit structure that can be assembled temporarily according to the present invention is a unit
However, according to the welding method in which the
The welding method of the present invention is a socket insertion welding method and a butt welding method.
First, the socket insertion welding method will be described.
The socket insertion welding method is shown in FIGS. 7 and 8.
The socket insertion welding method is a method of welding an improved angle welding portion K in a state where the inner diameter of the
The socket insertion welding method of the present invention has a cutting method (Fig. 7) and a socket ring method (Fig. 8).
As shown in FIG. 7, the cutting method is a cutting method while forming the
The thickness (t) of
As such, the cutting method is in a state where the rigidity of the joint unit structure is sufficient because the thickness t of the
On the other hand, the socket ring method (Fig. 8) is a method applied when the thickness t of the
In other words, in the cutting method, the
The
Since the socket ring method is applied when the thickness t of the connecting
9 is a view of local deformation generated in the upper and lower current connecting
The circular reinforcing
Since the circular reinforcing
The relationship between the
The
The
As shown in FIGS. 7 and 8, when the
However, it is impossible in this structure to temporarily assemble the
This will be described as follows.
The
The
However, in the socket insertion welding method, the length of the
The
In this state, it is impossible to insert the
However, the length of the
Next, the butt welding method will be described.
5A and 10 are views related to the butt welding method.
The butt welding method is a butt welding method in which the end portion of the truss member connecting
The length of the
The butt welding method does not have a supporting means capable of supporting the
The
The connecting
The left and right movement of the connecting
If the width of the connecting
The appearance relationship related to the lateral movement of the
10 (a) and 10 (b) show a state in which the connecting
10 (c) shows a state in which the connecting
As described above, the butt welding method is capable of lateral movement of the
Next, the combination of the butt welding method and the socket insertion welding method will be described.
Temporary assembly is not possible with the socket insertion welding method alone, but when the
The order of the
The upper and
However, insertion and connection of the sand member (or vertical member) 10B and the
In this way, the butt welding method and the socket insert welding method are used for inserting and connecting the upper and
Now, the configuration of the pipe truss joint unit structure which can be temporarily assembled according to the present invention will be described.
end. Structure of pipe truss joint unit structure that can be temporarily assembled by butt welding method
The present invention is to install a pipe truss joint unit structure capable of assembling the unit
Here, the
In addition, in order to reduce the stress concentration of the welded part of the front heel (F) and the heel (R), the configuration is reinforced by the following two methods.
One reinforcing method does not increase the cross-sectional thickness t of the yarn (or vertical) 10B, as shown in FIG. 11A, and increases only the cross-sectional thickness T of the yarn (or vertical) connecting
Without increasing the cross-sectional thickness t of the yarn (or vertical) 10B, it is possible for the yarn (or vertical) 10B to increase only the cross-sectional thickness T of the yarn (or vertical) connecting
The other reinforcing method makes the cross-sectional thickness t of the yarn (or vertical) 10B and the cross-sectional thickness t of the yarn (or vertical) connecting
As shown in Fig. 11B, while the cross section thickness t of the yarn (or vertical) 10B and the cross section thickness t of the yarn (or vertical) connecting
Since the
In contrast, the prior art cannot reinforce the
The angle of
When the connecting
In the temporarily assembled state, the improved angle welded portion K formed by the improved angle
I. Structure of pipe truss joint unit structure that can be temporarily assembled by using butt welding method and socket insert welding method
⒜ The present invention installs a pipe truss joint unit structure in which the unit
⒝ The present invention installs a pipe truss joint unit structure in which the unit
개선 An angle of
수직 When the
The tapered
(2) The
On the other hand, the joint unit structure of the present invention and the
Thus, sheath pipe installation and concrete (or non-shrinkage mortar) filling in the hollow part of the
파이프 The pipe truss joint unit structure of the present invention has a structure in which the unit
용접 Since the welding is possible in the assembled state, the welding is precise, and the quality of the entire truss structure as well as the quality of the welding is formed.
구조 It is easy to make accurate truss structure because it is possible to check and correct whether the plane formed by the truss member is properly in place in the assembled state.
용접 Since the truss structure can be easily welded and manufactured in the assembled state, construction of truss bridge is efficient and economical.
Due to the joint unit structure in the construction of truss bridge, the welding time is 1/5 of the existing method of directly welding and connecting the up and down current, and the unit cost for welding work is about 60% of the existing method.
조인트 The length of the joint unit structure is short enough that the hands of the welding worker can easily touch the inside of the joint unit structure. Therefore, it is possible to install a reinforcing plate to increase the rigidity inside the joint unit structure. It is beautiful and clean because it is not exposed.
The beauty of the bridge is enhanced by the beautiful aesthetic that the gusset plate or bolt connecting plate is not exposed to the outside, creating a neat appearance and a fine member.
(3) The rigidity of the
⒢ The use of a joint unit structure simplifies the production of complex members in a factory, improves the manufacturing accuracy, and reduces the defect rate.
1 is a cross-sectional view of a typical pipe truss bridge
2 is a state diagram showing a state in which the yarn is welded to the lower chord at the node of the pipe truss structure
Figure 3 is a state diagram showing the state connected to the yarn material gusset plate welded to the lower chord at the node of the pipe truss structure
Figure 4 is a cross-sectional view showing an embodiment of the truss structure consisting of a joint unit structure of the present invention
5a] perspective view of a joint unit structure for a butt welding method of the present invention
5b] A perspective view of a joint unit structure in which a butt welding method and a cutting method for a socket insertion welding method are used together
Fig. 5c is a perspective view of a joint unit structure in which a butt welding method and a socket ring method for a socket insertion welding method are used together;
6 is a model diagram in which the truss member is connected by the joint unit structure of the present invention.
7 is an exploded sectional view and a coupling view showing a state in which the truss connecting branch portion and the truss member of the joint unit structure of the present invention are assembled by a cutting method for a socket insertion welding method.
8 is an exploded cross-sectional view and a coupling view showing a state in which the truss connecting branch portion and the truss member of the joint unit structure of the present invention are assembled by the socket ring method for the socket insertion welding method.
Figure 9 is a local deformation shape showing the local deformation due to the axial force of the yarn at the node of Figure 8
10 is a process diagram showing a process in which the truss connecting branch portion and the truss member of the joint unit structure of the present invention is connected by a butt welding method.
11A is a cross-sectional view showing an embodiment in which the stiffness of the front and heel subjected to the concentrated stress in the joint unit structure of the present invention is increased by increasing the cross section of the joint unit structure;
11B is a cross-sectional view showing another embodiment in which the stiffness of the front heel and the heel subjected to the concentrated stress in the joint unit structure of the present invention is reinforced by an arched reinforcement plate;
Referring to the construction method of the truss bridge using the pipe truss joint unit structure that can be temporarily assembled according to the present invention.
end. Construction method by butt welding method
(B) positioning the joint structure "joint unit structure" in which the unit
상 Upper and lower
Welding each angle of improvement weld K in a preassembled state;
⒟ the construction method of the truss bridge using a pipe truss joint unit structure that can be pre-assembled, characterized in that it comprises a step of sequentially constructing while repeating the above-mentioned step ⒞ step.
I. Construction method using butt welding method and socket insert welding method
A) Construction method using butt welding method and cutting method
사 Up and down current connecting
(2) Insert and connect the upper and
Welding each angle of improvement weld K in a preassembled state;
⒟ the construction method of the truss bridge using a pipe truss joint unit structure that can be pre-assembled, characterized in that it comprises a step of sequentially constructing while repeating the above-mentioned step ⒞ step.
B) Construction method using butt welding method and socket ring method
(2) Insert and connect the upper and
Welding each angle of improvement weld K in a preassembled state;
⒟ the construction method of the truss bridge using a pipe truss joint unit structure that can be pre-assembled, characterized in that it comprises a step of sequentially constructing while repeating the above-mentioned step ⒞ step.
In addition, the front heel F and the heel are welded by welding the
The stress concentrated on the front heel F and the heel R by increasing only the thickness T of the yarn (or vertical) connecting
In addition, in the above step, the pre-assembly is reinforced by inserting and fixing the annular reinforcing
Since the present invention is a configuration in which the sheath pipe is installed in the hollow portion of the
When two or more unit triangles are continuously connected to each other due to the structure of the truss, the number of nodes is doubled, so that it is difficult to have all of the unit triangles connected in series be coplanar at the same time.
Since the connection work of the unit triangles is performed in sequence, a slight deviation from one node not only affects the unit triangles continuously connected in succession, but also is difficult to correct.
These problems are the same whether they are welded or bolted.
According to the present invention, it is possible to check whether the plane formed by the unit triangle in the preassembled state before fixing the truss member is on the same plane as well as the correction in the provisional assembled state.
Welding is easy because welding is done in the preassembled state. In addition, since the welding sequence is not necessary, welding can be performed at the same time, and thus welding is very fast.
The pipe suitable for the joint unit structure of the present invention is applicable to both square steel pipes as well as circular steel pipes.
It can be applied to curved bridges as well as straight bridges.
The upper and lower chord pipes can be bent into curved lines or the joint unit structure can be made into curves or bends.
In the factory, round or square pipes are assembled into segments of predetermined length suitable for transport and transported to the site.
In general, the nodes of truss bridges are vulnerable to localized cross-sectional deformation due to the concentrated loads that do not coincide with the main axis forming the upper and lower chords. As in the present invention, the circular reinforcement and the arcuate reinforcement plate are preferable.
In the case of multi-span composite truss bridges, the maximum axial force of the internal point is about twice that of the center axial force, so simply changing the dimensions or thickness of the member can be an uneconomical design.
In this case, for the rational design, it is possible to efficiently increase the sectional strength by filling the non-condensed flow concrete at the bottom of the point where excessive compressive force is generated.
By filling the lower chord interior in this way, not only the effect of enhancing the cross-sectional strength but also the secondary effect of substantially reducing the deflection and vibration can be obtained.
In the present point of the inner point where a large tensile force is generated, the tensile stress caused by the fixed load and the live load is tensioned when the initial compressive stress is introduced by tensioning the steel bar or steel wire in the non-stress state within the allowable stress range. By offsetting the compressive stress by a certain part, it is possible to efficiently control the maximum tensile stress in common use within the allowable stress.
According to the present invention, a truss member is temporarily assembled to a pipe truss joint unit structure capable of assembling a truss member, and the plane formed by the continuous unit triangles formed by these truss members is possible while positioning the truss member in the assembled state. Not only is it possible to check whether it is located on the same plane, but also the correction of the confirmed result is possible in the assembled state.
In the pre-assembled state in which the continuous triangular triangle formed by the truss member is kept in the same plane, the welding is not only accurate but also the welding work is facilitated, so that the welding is precise and the quality is improved, thereby further improving the structural stability of the truss. At the same time, the air is shortened and efficient and economical production and construction are achieved.
In the assembled state, the circular truss member is inserted into the pipe truss joint unit structure so that the cross-sectional shape of the truss member remains unchanged, unlike the gusset plate, so that local stress concentration due to the cross-sectional change does not occur, so that the cross-sectional force of the node Not only is this improved, the structural stability of the truss is further enhanced.
10; Truss member
10A; Upper and lower present
10B; Sand (or vertical)
10C; Horizontal
12; Triangular slope
14; Vertical section
16; Horizontal section
20; Joint unit structure
22; Unit structure body
23; Truss member connection branch, 232; Connecting branch body, 234; Root portion, 236; Triangular slope
23a; Upper and lower current branch
23b; Stock connection branch, 23b; Sand (or vertical) connection branch
24; Connecting ring
25; Socket
25a; Socket support, 252a;
25b; Stepped
25c; Socket support ring, 252c;
26; Connecting ring working hole
27; Circular reinforcement
28; Arched gusset
K; Arc angle weld
F; Forefoot
R; heels
Claims (13)
Without increasing the cross section of the sand member (or vertical member) 10B, by increasing only the thickness T of the yarn member (or vertical member) connecting branch portion 23b, the stress concentration at the welded portion of the front heel F and the heel R is reduced. Temporary assembled pipe truss joint unit structure
The arcuate reinforcing plate 28 is brought into contact with the longitudinal direction of the yarn (or vertical) connecting branch 23b and the outer peripheral surface of the lower chord connecting branch 23a so as to be concentrated on the front heel F and the heel R. Temporary prefabricated pipe truss joint unit structure characterized by reducing stress
Insertion and fixation of the annular reinforcing material 27 so that the socket ring 25c is in contact with the inner diameter of the end side of the upper / lower current connecting branch portion 23a welded and fixed, reinforcement of rigidity is possible. Unit structure
상 Upper and lower chord connecting branches 23a, yarn (or vertical) connecting branches 23b, upper and lower chords 10A corresponding to horizontal member connecting branches, and yarn (or vertical) 10B of the "joint unit structure". In the state where the horizontal member 10C is faced to each other, each connecting ring 24 is moved to the truss member 10 corresponding thereto by S to be temporarily assembled, and the upper and lower chords 10A are applied to the upper and lower chord connecting branches 23a. First pre-assembling and then pre-assembling the remaining yarn (or vertical) 10B and the horizontal member 10C;
Welding each angle of improvement weld K in a preassembled state;
⒟ Construction method of truss bridge using a prefabricated pipe truss joint unit structure, characterized in that it comprises the step of sequentially constructing while repeating the step ⒞ step ⒞
(2) Insert and connect the upper and lower chords 10A corresponding to the socket support part 25a of the upper and lower current joint branches 23a, and then temporarily assemble them, and then insert the yarn (or vertical) joint branches 23b and the horizontal member joints. The counters (or vertical members) 10B and the horizontal members 10C corresponding to the branches are faced to each other, and in this state, the respective connecting rings 24 are directed toward the member (or vertical members) 10B and the horizontal members 10C). Moving by assembling as much as possible;
Welding each angle of improvement weld K in a preassembled state;
⒟ Construction method of truss bridge using a prefabricated pipe truss joint unit structure, characterized in that it comprises the step of sequentially constructing while repeating the step ⒞ step ⒞
(2) Insert and connect the upper and lower chords 10A corresponding to the socket rings 25c of the upper and lower chord connecting branches 23a, and then temporarily assemble them, and then insert the yarn (or vertical) connecting branches 23b and the horizontal members. Abutting the sand (or vertical) 10B and the horizontal 10C corresponding to the branches, respectively, and in this state, moving each connecting ring 24 to the truss member 10 by S to preassemble;
Welding each angle of improvement weld K in a preassembled state;
⒟ Construction method of truss bridge using a prefabricated pipe truss joint unit structure, characterized in that it comprises the step of sequentially constructing while repeating the step ⒞ step ⒞
The front heel F and the heel by welding the arcuate reinforcement plate 28 to the longitudinal contact portion of the yarn (or vertical) connecting branch portion 23b and the contact surface of the outer circumferential surface of the lower chord connecting branch portion 23a. Construction method of truss bridge using a pipe truss joint unit structure that can be assembled can be characterized in that the stress concentrated in (R) is reduced
The stress concentrated on the front heel F and the heel R by increasing only the thickness T of the yarn (or vertical) connecting branch 23b without increasing the cross section of the yarn (or vertical) 10C in the step ⒜. Construction method of truss bridge using a pipe truss joint unit structure that can be temporarily assembled, characterized in that to reduce the
Provisional assembly is characterized in that the reinforcing steel reinforcement is reinforced by inserting and fixing the annular reinforcing material 27 so that the socket ring 25c is in contact with the inner diameter of the end side of the upper and lower current connecting branch portions 23a welded and fixed. Construction method of truss bridge using pipe truss joint unit structure
After installing the sheath pipe and filling concrete (or non-shrink mortar) in the hollow of the lower chord 10A, which is assembled and penetrated with the joint unit structure, which is the next step, the steel wire arrangement and steel wire Method of construction of truss bridge using a pipe truss joint unit structure that can be assembled, characterized in that it comprises a;
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020100032834A KR20110113444A (en) | 2010-04-09 | 2010-04-09 | Joint unit structure of pipe truss for temporary assembly and method constructing the truss bridge with it |
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| KR1020100032834A KR20110113444A (en) | 2010-04-09 | 2010-04-09 | Joint unit structure of pipe truss for temporary assembly and method constructing the truss bridge with it |
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| KR20110113444A true KR20110113444A (en) | 2011-10-17 |
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| KR1020100032834A KR20110113444A (en) | 2010-04-09 | 2010-04-09 | Joint unit structure of pipe truss for temporary assembly and method constructing the truss bridge with it |
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| KR (1) | KR20110113444A (en) |
Cited By (8)
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|---|---|---|---|---|
| KR101392508B1 (en) * | 2014-03-28 | 2014-05-12 | (주)비에스 | Lifting device for power transmission steel tower |
| CN104452571A (en) * | 2014-12-26 | 2015-03-25 | 重庆交通大学 | Modern bamboo sidewalk truss bridge |
| CN105735129A (en) * | 2016-02-26 | 2016-07-06 | 江苏中铁山桥重工有限公司 | Full-welding truss section modularized splicing method |
| CN105735102A (en) * | 2016-04-20 | 2016-07-06 | 四川省交通运输厅公路规划勘察设计研究院 | Concrete filled steel tube truss girder and bridge adopting concrete filled steel tube truss girder |
| KR101688194B1 (en) | 2015-12-08 | 2016-12-20 | (주)대창솔루션 | Junction Node of Truss for Offshore Wind Power Generation Plant |
| CN109024217A (en) * | 2018-07-17 | 2018-12-18 | 中铁大桥勘测设计院集团有限公司 | The connection structure and welding method of web member and chord member |
| CN112726375A (en) * | 2020-12-25 | 2021-04-30 | 上海建工四建集团有限公司 | Sectional type steel truss bridge and construction method thereof |
| KR102334957B1 (en) * | 2021-09-10 | 2021-12-06 | (주)해성기공 | Steel pipe join method using back ring |
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- 2010-04-09 KR KR1020100032834A patent/KR20110113444A/en not_active Application Discontinuation
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101392508B1 (en) * | 2014-03-28 | 2014-05-12 | (주)비에스 | Lifting device for power transmission steel tower |
| CN104452571A (en) * | 2014-12-26 | 2015-03-25 | 重庆交通大学 | Modern bamboo sidewalk truss bridge |
| CN104452571B (en) * | 2014-12-26 | 2016-01-06 | 重庆交通大学 | A kind of modern bamboo figure's row trussed bridge |
| KR101688194B1 (en) | 2015-12-08 | 2016-12-20 | (주)대창솔루션 | Junction Node of Truss for Offshore Wind Power Generation Plant |
| CN105735129A (en) * | 2016-02-26 | 2016-07-06 | 江苏中铁山桥重工有限公司 | Full-welding truss section modularized splicing method |
| CN105735102A (en) * | 2016-04-20 | 2016-07-06 | 四川省交通运输厅公路规划勘察设计研究院 | Concrete filled steel tube truss girder and bridge adopting concrete filled steel tube truss girder |
| CN109024217A (en) * | 2018-07-17 | 2018-12-18 | 中铁大桥勘测设计院集团有限公司 | The connection structure and welding method of web member and chord member |
| CN112726375A (en) * | 2020-12-25 | 2021-04-30 | 上海建工四建集团有限公司 | Sectional type steel truss bridge and construction method thereof |
| CN112726375B (en) * | 2020-12-25 | 2022-08-09 | 上海建工四建集团有限公司 | Sectional type steel truss bridge and construction method thereof |
| KR102334957B1 (en) * | 2021-09-10 | 2021-12-06 | (주)해성기공 | Steel pipe join method using back ring |
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