CN113279315B - Plate-truss combined structure with widened curve on vertical curve and design method thereof - Google Patents
Plate-truss combined structure with widened curve on vertical curve and design method thereof Download PDFInfo
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- CN113279315B CN113279315B CN202110530062.3A CN202110530062A CN113279315B CN 113279315 B CN113279315 B CN 113279315B CN 202110530062 A CN202110530062 A CN 202110530062A CN 113279315 B CN113279315 B CN 113279315B
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
- E01D6/00—Truss-type bridges
Abstract
The invention relates to the technical field of bridge engineering, in particular to a plate girder composite structure with a widened curve on a vertical curve and a design method thereof. The plate and truss combined structure comprises two chords arranged at intervals and a steel plate girder arranged between the two chords, characteristic points are arranged on a center line of the plate and truss combined structure according to internode intervals, a chord center line intersection point with an initial chord center line is obtained through characteristic point alignment at a curve widening bending part of the plate and truss combined structure, the chord center line intersection point is connected to serve as a final chord center line, a normal line or an angular bisector of the final chord center line is made at the chord center line intersection point, chord node transverse partition plates are arranged on a normal line or the angular bisector of the final chord center line, intersection points of the chord node transverse partition plates and webs on the inner sides of the chords and corresponding characteristic points on the plate and truss combined structure center line serve as connecting lines, and node cross beams are arranged on the connecting lines. The problem that the existing plate girder composite structure in the prior art is not suitable for a steel girder arch bridge with a widened curve can be solved.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a plate girder composite structure with a widened curve on a vertical curve and a design method thereof.
Background
In municipal bridge construction projects, river-crossing node bridges have important landscape functions, and steel truss structure bridges combined by plate girders are increasingly concerned with unique landscape models. According to the conventional plate-truss combined steel truss structure bridge, due to the requirement of stress, main truss members are located in the same plane, and the center line of the bridge is located in a straight line section, but a municipal bridge is limited by dense residences or businesses on two sides of a river sometimes, and the bridge line cannot be completely located in a straight line range. The width of the bridge is restricted by the linear index of the line center line and the connection condition of two banks, so that the asymmetric curve can be widened. The arrangement of the vertical curve of the bridge across the river nodes brings greater difficulty to the plate-truss combined arch bridge with the widened curve.
In a steel truss structure bridge combined by plate trusses with small and medium span or narrow bridge deck, the distance between the upstream main truss and the downstream main truss can be intentionally widened to meet the line requirement of widening a curve, and the bridge structure still keeps the coplanarity of the main trusses and the symmetry of the bridge deck structure. But obviously is not economical in the steel truss structure bridge with large span, wide bridge deck and severe linear change.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a plate girder composite structure with a widened curve on a vertical curve and a design method thereof, which can solve the problem that the existing plate girder composite structure in the prior art is not suitable for a steel girder arch bridge with a widened curve.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows:
in one aspect, the present invention provides a plate girder composite structure with a widened vertical curve, including:
the plate girder comprises two chords arranged at intervals and two steel plate girders arranged between the chords, wherein a plurality of characteristic points are arranged on a center line of a plate girder composite structure at intervals according to the internode interval of the truss bridge structure, a curve widening bending part of the plate girder composite structure obtains a chord center line intersection point with an initial chord center line through a characteristic point line on the center line of the plate girder composite structure, the chord center line intersection point is connected to serve as a final chord center line, a normal line or an angle bisector of the final chord center line is made at the chord center line intersection point, chord node transverse partition plates are arranged on the normal line or the angle bisector of the final chord center line, connecting lines are made at the intersection points of the chord node transverse partition plates and inner webs of the chords and corresponding characteristic points on the center line of the plate girder composite structure, and node cross beams are arranged on the connecting lines.
In some optional schemes, the plate girder composite structure central line is a bridge line design central line.
In some optional schemes, the height difference between the characteristic point on the central line of all the plate girder composite structures and the corresponding point on the central lines of the final chords on two sides is equal.
In some optional schemes, the chord is provided with chord internode transverse partition plates between chord node transverse partition plates, and the chord internode transverse partition plates are perpendicular to the final chord central line.
In some optional schemes, the steel plate girder is provided with an internode crossbeam at a standard internode length equal division point, the internode crossbeam is located on a normal line of the central line of the plate and truss combined structure passing through the standard internode length equal division point, and two ends of the internode crossbeam correspond to the chord internode transverse partition plates at two sides.
In some optional schemes, the steel plate girder and the chords on two sides are connected through a transverse connecting piece.
In some alternatives, the chord is a box-type structure.
On the other hand, the invention provides a design method of a plate girder composite structure with a widened curve on a vertical curve, which comprises the following steps:
determining initial chord member center lines on two sides according to the center line of the plate girder composite structure and the design width of the bridge structures on two sides;
a plurality of characteristic points are arranged on a center line of a plate and truss combined structure at intervals according to the internode spacing of a truss bridge structure, at the position of a curve of the plate and truss combined structure, which is widened and bent, a chord member center line intersection point with an initial chord member center line is obtained through a characteristic point line on the plate and truss combined structure center line, the chord member center line intersection point is connected to be used as a final chord member center line, a chord member center line normal line or an angle bisector is made at the chord member center line intersection point, and a chord member node transverse partition plate is arranged on the normal line or the angle bisector of the final chord member center line;
and taking the intersection point of the chord node diaphragm plate and the web plate on the inner side of the chord and the corresponding characteristic point on the central line of the plate girder composite structure as a connecting line, and arranging a node cross beam on the connecting line.
In some optional schemes, the height difference between the characteristic point on the central line of all the plate girder composite structures and the corresponding point on the central lines of the final chords on two sides is equal.
In some optional schemes, when the characteristic points corresponding to two adjacent node beams on the central line of the plate and truss combined structure have design height differences, the plate and truss combined structure section between the two node beams is designed and manufactured by adjusting the cross slopes of the two adjacent node beams and the internode beams between the two adjacent node beams, and the steel plate beam and the transverse connecting pieces on the inner sides of the two chords are not in the same plane, are matched, welded and fixedly connected.
Compared with the prior art, the invention has the advantages that: the relative position relation between chord member nodes and line center line corresponding points at curve widening bending positions of the plate girder composite structure and the structure of the steel plate girder are reasonably designed, so that the arrangement of the curve widening plate girder composite structure on a vertical curve is realized. Any line requirements for curve widening can be accommodated. The bridge structure does not need to keep the coplanarity of the main trusses and the symmetry of the bridge deck structure, and the economy of the steel truss structure bridge can be improved. The reasonable change of the width of the bridge deck is ensured, and the waste of the width of the bridge deck caused by once pulling open of the main truss interval in the prior art is avoided.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic top view of a plate girder composite structure according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure diagram of a plate girder composite structure in an embodiment of the invention.
In the figure: 1. a chord member; 10. final chord centerline; 11. chord member node diaphragm plate; 12. a chord internode diaphragm plate; 13. an inner web; 2. steel plate beams; 20. the central line of the plate girder composite structure; 21. a node beam; 22. an internode cross beam.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, in one aspect, the present invention provides a plate girder composite structure with a widened curve on a vertical curve, including: the method comprises two chords 1 arranged at intervals and a steel plate girder 2 arranged between the two chords 1, wherein a plurality of characteristic points are arranged on a central line 20 of a plate and truss combined structure at intervals according to the internode interval of the truss and bridge structure, a chord central line intersection point with an initial chord central line is obtained through characteristic point lines on the central line 20 of the plate and truss combined structure at a curve widening bending position of the plate and truss combined structure, the chord central line intersection point is connected to be used as a final chord central line 10, a normal line or an angle bisector of the final chord central line 10 is made at the chord central line intersection point, chord node transverse partition plates 11 are arranged on a normal line or the angle bisector of the final chord central line 10, connecting lines are made at the intersection points of the chord node transverse partition plates 11 and webs on the inner sides of the chords 1 and corresponding characteristic points on the central line 20 of the plate and truss combined structure, and node crossbeams 21 are arranged on the connecting lines.
When the plate and truss combined structure with the widened curve on the vertical curve is used, a chord member central line intersection point with an initial chord member central line is obtained by passing a characteristic point line on a plate and truss combined structure central line 20 at the curve widened and bent part of the plate and truss combined structure, the chord member central line intersection point is connected to be used as a final chord member central line 10, a normal line or an angle bisector of the final chord member central line 10 is made at the chord member central line intersection point, and a chord member node transverse partition plate 11 is arranged on the normal line or the angle bisector of the final chord member central line 10; and the intersection point of the chord member node diaphragm plate 11 and the web plate at the inner side of the chord member 1 and the corresponding characteristic point on the central line 20 of the plate girder composite structure are taken as connecting lines, and a node cross beam 21 is arranged on the connecting lines. The relative position relation between chord member nodes and line center line corresponding points at curve widening bending positions of the plate girder composite structure and the structure of the steel plate girder are reasonably designed, so that the arrangement of the curve widening plate girder composite structure on a vertical curve is realized. Any line requirement with a widened curve can be adapted.
In this example, the steel plate girder 2 is an orthotropic steel plate girder with a widened curve, and the plate girder composite structure is located on a vertical curve. When the characteristic points corresponding to two adjacent node beams 21 on the central line 20 of the plate girder composite structure have design height difference, the plate girder composite structure section between the two node beams 21 is designed and manufactured by adjusting the cross slopes of the two adjacent node beams 21 and the internode beams 22 between the two adjacent node beams and the non-coplanar matching, welding and fixing connection of the steel plate girder 2 and the transverse connecting pieces on the inner sides of the two chords 1. The bridge structure does not need to keep the coplane of the main trusses and the symmetry of the bridge deck structure, and the economy of the steel truss structure bridge can be improved.
In some alternative embodiments, the panel truss composite structure centerline 20 is a bridge line design centerline.
In the present embodiment, the central line 20 of the panel truss composite structure is a gentle curve or a circular curve on a plane, and the structure is asymmetrically widened toward the upstream and downstream sides. And determining the initial chord member central line according to the plate girder composite structure central line 20 and the design width of the bridge structures at two sides.
When the central line 20 of the plate girder composite structure is a gentle curve or a circular curve on a plane, the central line of the initial chord member is determined according to the central line 20 of the plate girder composite structure and the design width of the bridge structures at two sides. At the curve widening bending part of the plate and truss combined structure, a chord member central line intersection point with an initial chord member central line is obtained by passing through a characteristic point way line on a plate and truss combined structure central line 20, the chord member central line intersection point is connected to be used as a final chord member central line 10, an angular bisector or normal of the final chord member central line 10 is made at the chord member central line intersection point, a chord member node transverse partition plate 11 is arranged on the angular bisector normal of the final chord member central line 10, and therefore the chord member node transverse partition plate 11 is perpendicular to inner and outer side webs of a chord member 1 or is positioned at the chord member point, torsion resistance stability of the chord member 1 is higher, and manufacturing is more convenient.
The designed width of the bridge structures on the two sides is the width designed for the functions of the left side and the right side of the central line of the bridge, for example, a ramp or a sidewalk is arranged on one side, so that the widths of the left side and the right side of the bridge are inconsistent.
Due to the environmental reasons of bridge seating, the bridge is designed to be a curve, so the center point of the bridge is a curve. According to the design requirement, the center line of the bridge can be bent for multiple times, and similarly, the chords 1 on the two sides can be bent for multiple times as required by the functional requirement.
In some alternative embodiments, the height difference between the characteristic point on the centerline 20 of all the plate girder composite structures and the corresponding point on the centerline 10 of the final chord on both sides is equal.
In this embodiment, the height difference between the central line 20 of the plate and truss combined structure and the corresponding position of the final chord central line 10 on both sides is equal, so that the height difference between the steel plate girders 2 on the left and right sides is consistent when the widths are not consistent, but the height difference on the outermost side is consistent, so as to ensure the landscape effect of the perspective view of the bridge.
In some alternative embodiments, the chords 1 are each provided with an inter-chord nodal bulkhead 12 between chord nodal bulkheads, and the inter-chord nodal bulkheads 12 are perpendicular to the final chord centerline 10.
In this embodiment, the boom internode crosspieces 12 are provided between the boom node crosspieces 11, which improves the torsional stability of the boom 1.
In some alternative embodiments, the steel plate girder 2 is provided with an internode crossbeam 22 at the standard internode length bisection point, the internode crossbeam 22 is positioned on the normal line of the central line 20 of the plate girder composite structure passing through the standard internode length bisection point, and two ends of the internode crossbeam 22 correspond to the chord internode transverse partition plates 12 at two sides.
In some alternative embodiments, the steel plate girder 2 is connected with the chords 1 on both sides by a transverse connecting member.
In this embodiment, the two ends of the internode cross beam 22 correspond to the chord internode diaphragm plates 12 on the two sides and are connected by the transverse connecting pieces, so that effective force transmission from the internode cross beam 22 to the chord 1 can be ensured. The two ends of the node cross beam 21 correspond to the chord node diaphragm plates 11 on the two sides and are connected with the chords through the transverse connecting pieces so as to ensure that the stress of the node cross beam 21 is transmitted to the chords 1.
In some alternative embodiments, the chord 1 is a box-type structure. In this embodiment, the chord 1 includes an inner web, an outer web, a top plate and a bottom plate, forming a box-type structure, and further includes a chord node diaphragm 11 and a chord node diaphragm 12.
In another aspect, a method for designing a plate-girder composite structure with a widened curve on a vertical curve is provided, which includes the following steps:
s1: and determining the initial chord member central lines on two sides according to the plate girder composite structure central line 20 and the design width of the bridge structures on two sides.
In some alternative embodiments, the panel truss composite structure centerline 20 is determined from a bridge line design centerline.
In the present embodiment, the central line 20 of the panel truss composite structure is a gentle curve or a circular curve on a plane, and the structure is asymmetrically widened toward the upstream and downstream sides. And determining the initial chord member central line according to the plate girder composite structure central line 20 and the design width of the bridge structures at two sides.
S2: a plurality of characteristic points are arranged on a central line 20 of a plate and truss combined structure at intervals according to the internode spacing of a truss bridge structure, a chord member central line intersection point with an initial chord member central line is obtained through characteristic point practice lines on the central line 20 of the plate and truss combined structure at a curve widening bending position of the plate and truss combined structure, the chord member central line intersection point is connected to be used as a final chord member central line 10, a normal line or an angular bisector of the final chord member central line 10 is made at the chord member central line intersection point, and a chord member node transverse partition plate 11 is arranged on a normal line or the angular bisector of the final chord member central line 10.
In some alternative embodiments, the height difference between the characteristic point on the central line 20 of all the plate girder composite structures and the corresponding point on the central line 10 of the final chord on both sides is designed to be equal height difference. The steel plate girders 2 on the left side and the right side can be enabled to be different in width, but the height difference on the outermost side is consistent, so that the landscape effect of the perspective view of the bridge is ensured.
S3: the intersection point of the chord member node diaphragm plate 11 and the web plate at the inner side of the chord member 1 and the corresponding characteristic point on the central line 20 of the plate girder composite structure are taken as connecting lines, and a node cross beam 21 is arranged on the connecting lines.
A specific example is given below.
As shown in fig. 1-2, the invention provides a plate girder composite structure with a widened curve on a vertical curve, which comprises two chords 1, including an upstream chord and a downstream chord, wherein a steel plate girder 2 is arranged between the upstream chord and the downstream chord, and the steel plate girder 2 is an orthotropic steel plate girder with a widened curve. The plate girder composite structure is positioned on the vertical curve, and the line central line of the plate girder composite structure is a gentle curve or a circular curve on the plane. The upper chord member and the lower chord member are both box-shaped structures, the central lines of the upper chord member and the lower chord member are the final chord member central lines 10 respectively, and the upper chord member and the lower chord member, namely the two chord members 1 are bent at proper positions to adapt to the asymmetrical widening of the upper chord member and the lower chord member in the structure.
The two chords 1 are provided with chord node diaphragm plates 11 perpendicular to the final chord center line 10 at chord center line intersection points 101, 102, 103 and 104 (or bending nodes are arranged on the break angle bisector), so that intersection points of the chord node diaphragm plates 11 and inner side webs 13 of the two chords 1 are obtained, namely area characteristic points 131, 132, 133 and 134 of the two chords 1.
On the plane, the connecting line of the point 201 on the central line 20 of the plate and truss combined structure and the area characteristic points 131 and 132 of the chord 1 is the setting line of the node cross beam 21, and the connecting line of the point 202 on the central line 20 of the plate and truss combined structure and the area characteristic points 133 and 134 of the chord 1 is the setting line of the node cross beam 21. The point 203 of the central line 20 of the plate and girder combined structure is the bisector of the length between the joints 201 and 202 on the central line 20 of the plate and girder combined structure, and the normal line of the central line 20 of the plate and girder combined structure passing through the point 203 is the setting line of the beam 22 between the joints. And a chord member internode transverse clapboard 12 is arranged at the intersection point of the line where the internode transverse beam 22 and the inner side webs 13 of the two chord members 1 are positioned so as to ensure the effective force transmission of the internode transverse beam 22 and the chord members 1.
In some optional embodiments, when there is a design height difference at the feature point corresponding to two adjacent node beams 21 on the central line 20 of the plate and girder composite structure, the plate and girder composite structure segment between two node beams 21 is designed and manufactured by adjusting the cross slopes of two adjacent node beams 21 and the internode beam 22 therebetween, and the steel plate girder 2 and the transverse connectors inside the two chords 1 are not coplanar, matched, welded, and fixedly connected.
For example, since the height difference between 201 and 101 is the same as the height difference between 202 and 103, the structural widening in turn causes the distance between 201 and 101 and the distance between 202 and 103 on the plane to be different, so that the sectional plate girder composite structure is not coplanar. In the actual manufacturing process, the steel bridge deck and the side joint plates of the upstream chord member and the downstream chord member are not in coplanar, matched, welded and fixedly connected by adjusting the cross slopes of the node cross beams 21 and the internode cross beams 22. This accommodates any line demand for curve widening. The bridge structure does not need to keep the coplanarity of the main trusses and the symmetry of the bridge deck structure, and the economy of the steel truss structure bridge can be improved.
In summary, at the curve widening bending part of the plate and truss combined structure, a chord member central line intersection point with an initial chord member central line is obtained by passing through a characteristic point line on a plate and truss combined structure central line 20, the chord member central line intersection point is connected to be used as a final chord member central line 10, a normal line or an angular bisector of the final chord member central line 10 is made at the chord member central line intersection point, and a chord member node transverse partition plate 11 is arranged on the normal line or the angular bisector of the final chord member central line 10; and the intersection point of the chord member node diaphragm plate 11 and the inner side of the chord member 1 and the corresponding characteristic point on the central line 20 of the plate girder composite structure are taken as connecting lines, and node cross beams 21 are arranged on the connecting lines. The relative position relation between chord member nodes and line center line corresponding points at curve widening bending positions of the plate girder composite structure and the structure of the steel plate girder are reasonably designed, so that the arrangement of the curve widening plate girder composite structure on a vertical curve is realized. Any line requirement with a widened curve can be adapted. The bridge structure does not need to keep the coplanarity of the main trusses and the symmetry of the bridge deck structure, and the economy of the steel truss structure bridge can be improved.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A plate girder composite construction in which a curve on a vertical curve is widened, comprising:
the method comprises the following steps of arranging two chords (1) at intervals and arranging a plurality of characteristic points on a central line (20) of a plate and girder composite structure at intervals according to the internode interval of the truss and bridge structure, obtaining a chord central line intersection point with an initial chord central line at a curve widening bending position of the plate and girder composite structure through a characteristic point doing line on the central line (20) of the plate and girder composite structure, connecting the chord central line intersection point as a final chord central line (10), making a normal line or an angle bisector of the final chord central line (10) at the chord central line intersection point, arranging a chord node transverse partition plate (11) on the normal line or the angle bisector of the final chord central line (10), and making a connecting line by using an intersection point of the chord node transverse partition plate (11) and an inner web plate of the chord (1) and a corresponding characteristic point on the central line (20) of the plate and girder composite structure, a node cross beam (21) is arranged on the connecting line; the central line (20) of the plate girder composite structure is a design central line of a bridge line, and the central lines of the initial chords on the two sides are determined according to the central line (20) of the plate girder composite structure and the design width of the bridge structures on the two sides.
2. The composite structure of plate girder with widened curve on vertical curve as claimed in claim 1, wherein: the height difference between the characteristic point on the central line (20) of the plate girder composite structure and the corresponding point on the central lines (10) of the final chords on the two sides is equal.
3. The composite structure of plate girder with widened curve on vertical curve as claimed in claim 1, wherein: chord member (1) is equipped with chord member internode cross slab (12) between chord member node cross slab (11), just chord member internode cross slab (12) with final chord member central line (10) is perpendicular.
4. A panel-girder composite structure with a widened curve on the vertical curve according to claim 3, wherein: the steel plate girder (2) is provided with internode crossbeams (22) at standard internode length equal division points, the internode crossbeams (22) are positioned on the normal line of the plate girder composite structure central line (20) passing through the standard internode length equal division points, and two ends of the internode crossbeams (22) correspond to the chord member internode transverse clapboards (12) at two sides.
5. The composite structure of plate girder with widened curve on vertical curve as claimed in claim 1, wherein: the steel plate beam (2) is connected with the chords (1) on the two sides through transverse connecting pieces.
6. The composite structure of plate girder with widened curve on vertical curve as claimed in claim 1, wherein: the chord member (1) is of a box-shaped structure.
7. A design method of a plate-truss combined structure with a widened curve on a vertical curve is characterized by comprising the following steps:
determining initial chord member center lines on two sides according to the plate girder composite structure center line (20) and the design width of the bridge structure on two sides;
a plurality of characteristic points are arranged on a central line (20) of a plate and truss combined structure at intervals according to the internode spacing of a truss bridge structure, at the position of a curve of the plate and truss combined structure, a chord member central line intersection point with an initial chord member central line is obtained through characteristic point alignment lines on the central line (20) of the plate and truss combined structure, the chord member central line intersection point is connected to be used as a final chord member central line (10), a normal line or an angular bisector of the final chord member central line (10) is made at the chord member central line intersection point, and a chord member node transverse clapboard (11) is arranged on the normal line or the angular bisector of the final chord member central line (10);
and taking the intersection point of the chord member node diaphragm plate (11) and the web plate on the inner side of the chord member (1) and the corresponding characteristic point on the central line (20) of the plate and truss combined structure as a connecting line, and arranging a node cross beam (21) on the connecting line.
8. The method for designing a plate girder composite structure with a widened curve on a vertical curve according to claim 7, wherein the method comprises the following steps: the height difference between the characteristic point on the central line (20) of the plate girder composite structure and the corresponding point on the central lines (10) of the final chords on the two sides is equal.
9. The method for designing a composite structure of a plate girder having a widened curve on a vertical curve according to claim 7, wherein: when the characteristic points corresponding to two adjacent node cross beams (21) on the central line (20) of the plate girder composite structure have design height difference, the plate girder composite structure section between the two node cross beams (21) is designed and manufactured by adjusting the cross slope of the two adjacent node cross beams (21) and the internode cross beam (22) between the two adjacent node cross beams and the non-coplanar matching welding fixed connection of the steel plate girder (2) and the transverse connecting pieces at the inner sides of the two chords (1).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201635258U (en) * | 2010-01-27 | 2010-11-17 | 中铁大桥勘测设计院有限公司 | Variable cross-section box-shaped rod |
| CN204530426U (en) * | 2015-04-14 | 2015-08-05 | 招商局重庆交通科研设计院有限公司 | Public rail dual-purpose pair of purlin sheet plate girder compound beam |
| CN109024267A (en) * | 2018-07-04 | 2018-12-18 | 中铁大桥勘测设计院集团有限公司 | A kind of Steel Truss Beam structure of curve bridge floor |
| CN111139722A (en) * | 2020-01-17 | 2020-05-12 | 陕西省交通规划设计研究院 | Novel steel box girder and steel-concrete composite girder structure |
| CN212611905U (en) * | 2020-03-30 | 2021-02-26 | 上海市政工程设计研究总院（集团）有限公司 | Become high widen diaphragm |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8104130B2 (en) * | 2007-09-27 | 2012-01-31 | Marc Lerner | Bridge structure |
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| CN201635258U (en) * | 2010-01-27 | 2010-11-17 | 中铁大桥勘测设计院有限公司 | Variable cross-section box-shaped rod |
| CN204530426U (en) * | 2015-04-14 | 2015-08-05 | 招商局重庆交通科研设计院有限公司 | Public rail dual-purpose pair of purlin sheet plate girder compound beam |
| CN109024267A (en) * | 2018-07-04 | 2018-12-18 | 中铁大桥勘测设计院集团有限公司 | A kind of Steel Truss Beam structure of curve bridge floor |
| CN111139722A (en) * | 2020-01-17 | 2020-05-12 | 陕西省交通规划设计研究院 | Novel steel box girder and steel-concrete composite girder structure |
| CN212611905U (en) * | 2020-03-30 | 2021-02-26 | 上海市政工程设计研究总院（集团）有限公司 | Become high widen diaphragm |
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| CN113279315A (en) | 2021-08-20 |
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