CN109811635B - Hinge structure and steel truss structure - Google Patents
Hinge structure and steel truss structure Download PDFInfo
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- CN109811635B CN109811635B CN201910147384.2A CN201910147384A CN109811635B CN 109811635 B CN109811635 B CN 109811635B CN 201910147384 A CN201910147384 A CN 201910147384A CN 109811635 B CN109811635 B CN 109811635B
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Abstract
The invention discloses a hinge structure, which relates to the technical field of bridges and comprises a first hinge assembly and a second hinge assembly, wherein the first hinge assembly comprises a concave body, at least one first supporting plate and a first bottom plate, the first supporting plate is fixed on the first bottom plate, the concave body is fixed on the first supporting plate, and the concave body is provided with a groove. The second hinge assembly comprises a convex body, at least one second supporting plate and a second bottom plate, the second supporting plate is fixed on the second bottom plate, the convex body is fixed on the second supporting plate, the convex body is provided with a convex surface matched with the groove, and the convex body can slide and rotate along the groove through the convex surface. The invention also discloses a steel truss girder structure. The invention has simple structure and easy installation and removal.
Description
Technical Field
The invention relates to the technical field of bridges, in particular to a hinge structure and a steel truss structure.
Background
In the field of bridge engineering, with the development of economy and technology, the requirement on navigation grade is higher and higher, the span of a bridge is also required to be larger and larger, and bridge types suitable for large-span bridges such as suspension bridges and cable-stayed bridges are widely adopted.
The installation of the cable-stayed bridge generally adopts cantilever erection, the bridge line shape in the construction process is basically the same as the bridge forming line shape completely finished by dead load, the installation of the beam sections is in a cantilever state, and the beam sections can be smoothly installed without other auxiliary measures.
The installation of the suspension bridge is to construct a main tower and a main cable firstly, then install a sling and hoist a main truss girder section, and temporarily adopt a temporary hinge structure to connect adjacent girder sections so as to adapt to the form change of the main cable and a main girder in the installation process. Referring to fig. 1A and 1B, as the main cable is of a flexible structure, when the steel truss girder segments in the span are installed, only the middle of the main cable is loaded, the line shape of the main cable is a deep concave shape, the upper chord of the steel truss girder is in a tight jacking state, the lower chord of the steel truss girder is in an opening state, as the number of the steel truss girder segments installed on two banks of the river is gradually increased, the load is gradually increased, the line shape of the main cable is also continuously changed, the deep concave shape is gradually changed into a flat concave shape, and therefore, the height difference and the included angle between every two adjacent steel truss girder segments are also gradually changed along with the increase of the steel truss girder segments to be hoisted. Because the length of the sling and the size of the steel truss girder are manufactured according to the design state when the constant load is finished, only when the linear shape of the main cable and the linear shape of the steel truss girder reach the design state after the steel truss girder sections are completely hoisted, the opening of the lower chord is closed to be zero, and bolt holes of the steel truss girder sections can be completely aligned and formally connected. Therefore, the temporary hinge structure is indispensable in the installation process, and has the functions of limiting the longitudinal displacement of the adjacent steel truss girder segments and enabling the adjacent steel truss girder segments to rotate relatively so as to adjust the linear shape of the steel truss girder to adapt to the change of the main cable until the opening and closing of the lower chord are zero.
The common hinge structure is mainly composed of three parts, namely a left hinge plate, a right hinge plate and a hinge shaft. However, in the installation process, the main cable shape does not reach the designed line shape due to incomplete dead load, and the sling and the steel truss beam segment are manufactured according to the designed line shape, so that the vertical and horizontal height difference and the included angle of the steel truss beam segment necessarily exist in the hinge holes of the left hinge plate and the right hinge plate on the adjacent steel truss beam segment in the installation process. In order to enable the hinge shaft to penetrate into the hinge hole, a large temporary pressure weight needs to be added on the steel truss girder sections, and other measures are taken to adjust the longitudinal displacement between the steel truss girder sections, so that the hinge shaft holes on the left hinge plate and the right hinge plate are completely overlapped, and the hinge shaft can be inserted. Because the hinge shaft is forcibly installed by external force, the hinge shaft is required to bear hundreds of tons of shearing force in the installation process of the steel truss girder, so that the hinge shaft is huge, difficult to design, manufacture and install and poor in economical efficiency.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a hinge structure and a steel truss structure, which are simple in structure and easy to install and dismantle.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a hinge structure comprising:
the first hinge assembly comprises a concave body, at least one first supporting plate and a first bottom plate, wherein the first supporting plate is fixed on the first bottom plate, the concave body is fixed on the first supporting plate, and the concave body is provided with a groove;
and the second hinge assembly comprises a convex body, at least one second supporting plate and a second bottom plate, the second supporting plate is fixed on the second bottom plate, the convex body is fixed on the second supporting plate, the convex body is provided with a convex surface matched with the groove, and the convex body can slide and rotate along the groove through the convex surface.
On the basis of the technical scheme, the groove of the concave body is a rectangular groove.
On the basis of the technical scheme, the convex surface of the convex body is an arc cylindrical surface.
On the basis of the technical scheme, the width of the rectangular groove is slightly larger than that of the arc cylindrical surface.
On the basis of the technical scheme, the number of the first supporting plates is two, and the first supporting plates are arranged on the first bottom plate at intervals.
On the basis of the technical scheme, the number of the second supporting plates is two, and the two second supporting plates are arranged on the second bottom plate at intervals.
The object of the present invention is also to provide a steel truss structure comprising:
a plurality of steel truss sections, any two adjacent steel truss sections being hinged by a hinge structure, the hinge structure comprising,
-a first hinge assembly provided on one of said steel truss sections, said first hinge assembly comprising a female body, at least one first support plate and a first base plate, said first support plate being fixed to the first base plate, said female body being fixed to the first support plate, said female body being provided with a groove;
-a second hinge assembly provided on the other of said steel truss sections, said second hinge assembly comprising a male body, at least one second support plate and a second base plate, said second support plate being fixed to the second base plate, said male body being fixed to the second support plate, said male body being provided with a convex surface adapted to said groove, said male body being slidable and rotatable along said groove by means of the convex surface.
On the basis of the technical scheme, the first hinge assembly and the second hinge assembly are respectively fixed on the upper chord or the bridge deck of two adjacent steel truss girder sections.
On the basis of the technical scheme, the groove of the concave body is a rectangular groove.
On the basis of the technical scheme, the convex surface of the convex body is an arc cylindrical surface.
Compared with the prior art, the invention has the advantages that: the hinge structure and the steel truss structure are provided with the first hinge assembly 1 and the second hinge assembly 2, the structure is simple, the first hinge assembly 1 and the second hinge assembly 2 can relatively slide and rotate, and can be smoothly installed without auxiliary measures such as weight pressing, push-pull and the like during installation, so that the construction progress is accelerated, the use amount of materials of the hinge structure is reduced, the steel truss structure is simple and convenient to dismantle, and good economic and social benefits are achieved.
Drawings
Fig. 1A is a schematic structural view of conventional suspension bridge hoisting.
Fig. 1B is a schematic structural view of a common hinge structure for hoisting a conventional suspension bridge.
Fig. 2 is a schematic structural view of a hinge structure according to an embodiment of the present invention.
FIG. 3A is a front view of a first hinge assembly in an embodiment of the present invention;
FIG. 3B is a left side view of the first hinge assembly in an embodiment of the present invention;
FIG. 3C is a top view of the first hinge assembly in an embodiment of the present invention;
FIG. 4A is a front view of a second hinge assembly in an embodiment of the present invention;
FIG. 4B is a left side view of a second hinge assembly in an embodiment of the present invention;
FIG. 4C is a top view of a second hinge assembly in an embodiment of the present invention;
FIG. 5A is a schematic view of an initial hoisting state of a steel truss girder segment according to an embodiment of the invention;
FIG. 5B is a schematic illustration of an embodiment of the present invention with approximately half the number of steel truss sections installed;
FIG. 5C is a schematic view of the complete hoisting state of all the steel truss girder segments in the embodiment of the invention;
FIG. 5D is a top view of the complete hoisting of all the steel truss sections in the embodiment of the present invention;
in the figure: 1. a first hinge assembly; 11. a concave body; 111. a groove; 12. a first support plate; 13. a first base plate; 2. a second hinge assembly; 21. a convex body; 211. a convex surface; 22. a second support plate; 23. a second base plate; 3. a steel truss beam segment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Referring to fig. 2, an embodiment of the present invention provides a hinge structure including a first hinge assembly 1 and a second hinge assembly 2, and referring to fig. 3A to 3C, the first hinge assembly 1 includes a concave body 11, at least one first support plate 12, and a first base plate 13, the first support plate 12 is fixed on the first base plate 13, the concave body 11 is fixed on the first support plate 12, and the concave body 11 is provided with a groove 111. The first support plates 12 of the hinge structure in the embodiment of the present invention are two and are spaced apart from each other and arranged on the first base plate 13, and the grooves 111 of the concave body 11 are rectangular grooves.
Referring to fig. 4A to 4C, the second hinge assembly 2 includes a convex body 21, at least one second support plate 22 and a second base plate 23, the second support plate 22 is fixed to the second base plate 23, the convex body 21 is fixed to the second support plate 22, the convex body 21 is provided with a convex surface 211 matched with the groove 111, and the convex body 21 can slide and rotate along the groove 111 through the convex surface 211. The two second supporting plates 22 of the hinge structure in the implementation of the present invention are arranged on the second bottom plate 23 at intervals, and the convex surface 211 of the convex body 21 is a circular cylindrical surface. Preferably, the width of the rectangular groove is slightly larger than that of the circular arc cylindrical surface.
An embodiment of the present invention further provides a steel truss structure, including: a plurality of steel truss girder segments 3 and hinge structures, arbitrary two adjacent steel truss girder segments 3 are articulated through hinge structures, hinge structures include first hinge subassembly 1 and second hinge subassembly 2, first hinge subassembly 1 includes concave body 11, at least one first backup pad 12 and first bottom plate 13, first backup pad 12 is fixed on first bottom plate 13, concave body 11 is fixed on first backup pad 12, concave body 11 is equipped with a recess 111. The first support plates 12 of the hinge structure in the embodiment of the present invention are two and are spaced apart from each other and arranged on the first base plate 13, and the grooves 111 of the concave body 11 are rectangular grooves.
The second hinge member 2 comprises a male body 21, at least one second support plate 22 and a second base plate 23, the second support plate 22 being fixed to the second base plate 23, the male body 21 being fixed to the second support plate 22, the male body 21 being provided with a convex surface 211 adapted to the groove 111, the male body 21 being slidable and rotatable along the groove 111 by means of the convex surface 211. The two second supporting plates 22 of the hinge structure in the implementation of the present invention are arranged on the second bottom plate 23 at intervals, and the convex surface 211 of the convex body 21 is a circular cylindrical surface. Preferably, the width of the rectangular groove is slightly larger than that of the circular arc cylindrical surface.
Specifically, as shown in fig. 5A to 5D, a process is demonstrated in which the number of adjacent steel truss sections 3 gradually increases from the initial hoisting to the hoisting of the steel truss sections 3 until all the steel truss sections 3 are hoisted.
Referring to fig. 5A, the steel girder segment 3 is in an initial hoisting state: at this time, the newly installed adjacent steel truss girder sections 3 are just hung and provided with slings, the height difference h and the included angle alpha of the adjacent steel truss girder sections 3 are large, the contact stress point of the arc cylindrical surface of the convex surface 211 and the groove 111 is high, and the arc cylindrical surface is positioned at the top of the concave body 11.
Referring to fig. 5B, about half the number of steel truss sections 3 has been installed: along with the gradual increase of the installation quantity of the steel truss girder sections 3, the main cables gradually transition from a deep concave shape to a flat concave shape, the main cables and the steel truss girder sections are gradually close to the designed shape in a linear shape, the height difference h and the included angle alpha of the adjacent steel truss girder sections 3 are gradually reduced, and the contact stress point of the arc cylindrical surface of the convex surface 211 and the groove 111 gradually slides and descends, but is still positioned at the middle upper part of the concave body 11.
Referring to fig. 5C and 5D, the hoisting completion state (the bridge design state) of all the steel truss girder segments 3 is as follows: at the moment, the steel truss girder segments 3 are completely hoisted, the height difference h and the included angle alpha of the adjacent steel truss girder segments 3 are reduced to zero, the contact stress point of the arc cylindrical surface of the convex surface 211 and the groove 111 is positioned in the middle of the concave body 11, the main cable and the steel truss girder are in a designed state at the moment, and the installation work of all the steel truss girder segments 3 is completed.
Compared with the prior art, the steel truss girder structure of the embodiment of the invention has the advantages that any two adjacent steel truss girder sections 3 are hinged through the hinge structure, the hinge structure comprises the first hinge assembly 1 and the second hinge assembly 2, the convex body 21 can slide and rotate along the groove 111 through the convex surface 211 by utilizing the characteristic that the steel truss girder sections 3 are always in the upper chord tightening and the lower chord opening in the installation process, the first hinge assembly 1 and the second hinge assembly 2 can slide and rotate relatively, any two adjacent steel truss girder sections 3 can slide and rotate relatively, the huge internal force caused by the difference of the vertical height of the steel truss girder sections 3 is released, the first hinge assembly 1 and the second hinge assembly 2 of the embodiment of the invention have simple structures, can be installed smoothly without adopting auxiliary measures such as weight pressing, push-pull and the like in the installation process, the construction is accelerated, and the material usage amount of the hinge structure is reduced, and the dismounting is simple and convenient, and the economic and social benefits are good.
The present invention is not limited to the above-described embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements are also considered to be within the scope of the present invention. Those not described in detail in this specification are within the skill of the art.
Claims (6)
1. An articulating structure for articulation between two adjacent steel truss segments, comprising:
a first hinge member (1) comprising a concave body (11), at least one first support plate (12) and a first base plate (13), said first support plate (12) being fixed to the first base plate (13), said concave body (11) being fixed to the first support plate (12), said concave body (11) being provided with a recess (111);
-a second hinge assembly (2) comprising a male body (21), at least one second support plate (22) and a second base plate (23), said second support plate (22) being fixed to the second base plate (23), said male body (21) being fixed to the second support plate (22), said male body (21) being provided with a convex surface (211) adapted to said groove (111), said male body (21) being slidable and rotatable along said groove (111) by means of the convex surface (211);
the groove (111) of the concave body (11) is a rectangular groove;
the convex surface (211) of the convex body (21) is a circular arc cylindrical surface.
2. The hinge structure according to claim 1, wherein: the width of the rectangular groove is slightly larger than that of the arc cylindrical surface.
3. The hinge structure according to claim 1, wherein: the number of the first supporting plates (12) is two, and the first supporting plates are arranged on the first bottom plate (13) at intervals.
4. The hinge structure according to claim 1, wherein: the number of the second supporting plates (22) is two, and the second supporting plates are arranged on the second bottom plate (23) at intervals.
5. A steel truss structure, comprising:
a plurality of steel truss sections (3), any two adjacent steel truss sections (3) being hinged by a hinge structure comprising,
-a first hinge assembly (1) arranged on one of said steel girder segments (3), said first hinge assembly (1) comprising a female body (11), at least one first support plate (12) and a first bottom plate (13), said first support plate (12) being fixed to the first bottom plate (13), said female body (11) being fixed to the first support plate (12), said female body (11) being provided with a recess;
-a second hinge member (2) arranged on the other of said steel girder segments (3), said second hinge member (2) comprising a male body (21), at least one second support plate (22) and a second bottom plate (23), said second support plate (22) being fixed to the second bottom plate (23), said male body (21) being fixed to the second support plate (22), said male body (21) being provided with a convex surface adapted to said groove, said male body (21) being slidable and rotatable along said groove by means of the convex surface;
the groove (111) of the concave body (11) is a rectangular groove;
the convex surface (211) of the convex body (21) is a circular arc cylindrical surface.
6. The steel truss structure of claim 5 wherein:
the first hinge assembly (1) and the second hinge assembly (2) are respectively fixed on the upper chord or the bridge deck of two adjacent steel truss girder sections (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910147384.2A CN109811635B (en) | 2019-02-27 | 2019-02-27 | Hinge structure and steel truss structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147384.2A CN109811635B (en) | 2019-02-27 | 2019-02-27 | Hinge structure and steel truss structure |
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| CN109811635A CN109811635A (en) | 2019-05-28 |
| CN109811635B true CN109811635B (en) | 2021-04-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US2338468A (en) * | 1942-06-19 | 1944-01-04 | John R Tench | Channeled girder or truss |
| US4282619A (en) * | 1979-11-16 | 1981-08-11 | Havens Steel Company | Truss structure |
| CN2893039Y (en) * | 2005-12-14 | 2007-04-25 | 于永久 | Light assembling wall board with ends coupling structure |
| CN104594182B (en) * | 2014-11-25 | 2017-01-04 | 中铁大桥勘测设计院集团有限公司 | Arch beam connecting structure of steel truss girder arch bridge and construction method |
| CN206319485U (en) * | 2016-12-07 | 2017-07-11 | 中铁三局集团建筑安装工程有限公司 | Segmental slipping roof system steel truss and assembled supplementary structure |
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