CN113279317B - Curved line widening steel truss arch bridge and design method thereof - Google Patents
Curved line widening steel truss arch bridge and design method thereof Download PDFInfo
- Publication number
- CN113279317B CN113279317B CN202110529436.XA CN202110529436A CN113279317B CN 113279317 B CN113279317 B CN 113279317B CN 202110529436 A CN202110529436 A CN 202110529436A CN 113279317 B CN113279317 B CN 113279317B
- Authority
- CN
- China
- Prior art keywords
- bridge
- web
- steel truss
- chord member
- arch bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D4/00—Arch-type 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Abstract
The invention relates to the technical field of bridge construction, in particular to a curved line variable width steel truss arch bridge and a design method thereof. This steel purlin arched bridge includes: the device comprises two main trusses arranged at intervals, wherein each main truss comprises a plurality of chords which are sequentially connected, and each chord comprises an inner web and an outer web which are arranged at intervals; wherein, at all curve widen buckling point of steel purlin arch bridge, the corresponding position inboard web and the outside web of chord member all are equipped with the bending point that two intervals set up in the longitudinal bridge upwards, the bending point that inboard web and outside web correspond the position forms a face of buckling, two chord member between the face of buckling is used for connecting the plumb bob montant. The problem that in the prior art, the main truss chord member and the vertical rods need to be bent in the curve range, so that the difficulty in design and manufacturing is increased can be solved.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a curved line variable width steel truss arch bridge and a design method thereof.
Background
The steel truss arch bridge has the advantages of ambitious modeling, strong bearing capacity and large rigidity, and is widely applied to a large-span bridge structure. Steel truss arch bridges are typically made up of two or more main trusses, a connecting system between the main trusses, and a deck system. The main truss comprises an upper chord, a lower chord and a web plate. The main truss forms generally include a meter shape, an N shape and a triangular shape, and the steel truss arch bridge generally adopts the N shape.
In the traditional steel truss arch bridge, in order to facilitate design and manufacture, the line central line in the arch bridge range is generally a straight line, and the main trusses are arranged in parallel with the line central line, namely, the distance between the main trusses is not changed, namely, the width of a bridge deck is not changed. However, due to the rapid development of the current urban construction, the two side spans of the large-span continuous steel truss arch bridge often face the problem of connection with the existing road, so that the central line of the line in the bridge span range is difficult to be ensured to be a straight line, and the width of the bridge deck is equal.
The conventional method is used for realizing the curve widening of the N-shaped truss type continuous steel truss arch bridge, and comprises two methods: the first is that the center spacing of the main girders is once opened to the required maximum spacing to ensure the width of the bridge deck, and the plane of the main girders is splayed, so that all the rod pieces in the main girders do not need to be bent, but the bridge deck generates large waste; the second is that the central line of the main girder is in the range of the curve line, the main girder is bent at the node by using the straight curve as the reference according to the side line of the bridge width, thus the bridge width can be accurately ensured, but the chord member and the vertical member of the main girder in the curve range need to be bent, and the design and manufacturing difficulty is increased.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a steel truss arch bridge with a widened curve and a design method thereof, which can solve the problem that the design and manufacturing difficulty is increased because the main truss chord member and the vertical member are required to be bent in the curve range in the prior art.
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 curved, widening steel truss arch bridge comprising:
the device comprises two main trusses arranged at intervals, wherein each main truss comprises a plurality of chords which are sequentially connected, and each chord comprises an inner web and an outer web which are arranged at intervals;
wherein, at all curve widen buckling point of steel purlin arch bridge, the corresponding position inboard web and the outside web of chord member all are equipped with the bending point that two intervals set up in the longitudinal bridge upwards, the bending point that inboard web and outside web correspond the position forms a face of buckling, two chord member between the face of buckling is used for connecting the plumb bob montant.
In some optional schemes, a transition diaphragm is arranged between the two bending surfaces on the chord member, and two ends of the transition diaphragm are respectively connected with the inner side web and the outer side web.
In some optional schemes, an angle bisector of a center line of the steel truss arch bridge at the curve widening bend or an intersection point of a normal line and the center line of the chord is used as a normal line or an angle bisector of the center line of the chord, and a transition diaphragm is arranged on the normal line or the angle bisector of the center line of the chord.
In some optional schemes, a bridge deck is arranged between two corresponding chords of the transverse bridge, a transition cross beam is arranged between the two corresponding transition transverse partition plates, a connecting line is formed between the intersection point of the transition transverse partition plate and the inner side of the chord and the corresponding point of the center line of the steel truss arch bridge at the curve widening bending position, and the transition cross beam is arranged on the connecting line.
In some optional schemes, the two bending surfaces of each chord are planes of the transition diaphragm which are offset by a set distance on two sides in the normal direction, and a positioning diaphragm is arranged at the two bending surfaces of each chord.
In some optional schemes, two ends of the transition diaphragm are respectively provided with a transverse connecting piece used for connecting the transition beam and a transverse connecting piece used for connecting the sidewalk steel bridge deck.
On the other hand, the invention provides a design method of a curve widening steel truss arch bridge, which comprises the following steps:
determining the center lines of all the chords according to the center line of the steel truss arch bridge and the design width of bridge structures on two sides;
all curves of steel purlin arch bridge widen the department of buckling, corresponding position the buckling point that the inboard web of chord member and the longitudinal bridge of outside web set up to all being equipped with two intervals, just the buckling point that inboard web and outside web correspond the position forms a plane of buckling, so that two chord member between the plane of buckling is used for connecting the plumb bob montant.
In some optional schemes, an angle bisector of a center line of the steel truss arch bridge at the curve widening bend or an intersection point of a normal line and the center line of the chord is used as a normal line or an angle bisector of the center line of the chord, and a transition diaphragm is arranged on the normal line or the angle bisector of the center line of the chord.
In some optional schemes, a connecting line is made by an intersection point of the transition diaphragm plate and the inner side of the chord member and a corresponding point of the center line of the steel truss arch bridge at the curve widening bending part, and the transition beam is arranged on the connecting line.
In some optional schemes, a plane of the transition diaphragm after translating a set distance on two sides of the normal direction of the transition diaphragm is taken as a bending plane, and a positioning diaphragm is arranged on the bending plane.
Compared with the prior art, the invention has the advantages that: set up two faces of buckling on the chord member of all curve widen departments of steel purlin arch bridge, make steel purlin arch bridge buckle according to the design demand, all need not to buckle for all the other members, especially the plummet montant of the department of buckling need not the design of buckling, has reduced the design and has made the degree of difficulty. 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 chord member at a bend according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of the installation positions of the transition diaphragm and the transition beam in the embodiment of the invention;
fig. 4 is a schematic plan view of a curved widening steel truss arch bridge in an example of the invention.
In the figure: 1. a chord member; 11. an inner web; 12. an outboard web; 13. a transition diaphragm plate; 14. positioning the partition plate; 15. a top plate; 16. a base plate; 2. a bridge deck; 21. a transition beam; 3. a plumb bob vertical rod; 4. a transverse connector; 5. a diagonal web member.
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 fig. 2, the invention provides a curved line widening steel truss arch bridge, which comprises two main trusses arranged at intervals, each main truss comprises a plurality of chords 1 connected in sequence, and each chord 1 comprises an inner web 11 and an outer web 12 arranged at intervals; wherein, at all curve widen buckling point of steel purlin arched bridge, the inboard web 11 and the outside web 12 of corresponding position chord member 1 all are equipped with the bending point that two intervals set up on vertical bridge, and the bending point of inboard web 11 and the corresponding position of outside web 12 forms a plane of buckling, and chord member 1 between two planes of buckling is used for connecting plumb bob montant 3.
This curve widen steel truss arch bridge, through all curve widen bending point at steel truss arch bridge, the inside web 11 and the outside web 12 of every chord member 1 all are equipped with the bending point that two intervals set up upwards in the longitudinal bridge, make the bending point of inside web 11 and the corresponding position of outside web 12 form a face of buckling to chord member 1 between two faces of buckling is used for connecting plumb montant 3. According to the design, the two bending surfaces are arranged on the chord member 1 at the curve widening position of the steel truss arch bridge, so that the steel truss arch bridge is bent according to design requirements, other members do not need to be bent, particularly, the plumb bob vertical rod 3 at the bending position does not need to be bent, and the design and manufacturing difficulty is reduced. 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.
In some alternative embodiments, a transition diaphragm 13 is disposed between the two bending surfaces of the chord 1, and both ends of the transition diaphragm 13 are respectively connected to the inner web 11 and the outer web 12.
In the present embodiment, the chord member 1 further includes a top plate and a bottom plate, the inner web 11 and the outer web 12 are provided with a transition diaphragm 13, in this embodiment, the transition diaphragm 13 is provided between two bending surfaces, that is, the transition diaphragm 13 is provided at a position corresponding to the vertical plumb rod 3, so as to ensure the strength of the chord member 1. And the other equal-division nodes of the chord member 1 are also provided with internode transverse partition plates, and the equal-division nodes are positions for arranging other vertical hammer members 3.
In some alternative embodiments, the normal line or angular bisector of the chord center line is made by the angular bisector or of the center line of the steel truss arch bridge at the curve widening bend or the intersection point of the normal line and the chord center line, and the transition diaphragm 13 is arranged on the normal line or angular bisector of the chord center line.
In some optional embodiments, a bridge deck 2 is arranged between two corresponding chords 1 in the transverse bridge direction, a transition cross beam 21 is arranged between two corresponding transition diaphragm plates 13, a connecting line is formed by the intersection point of the transition diaphragm plates 13 and the inner sides of the chords 1 and the corresponding point of the center line of the steel truss arch bridge at the curve widening bending position, and the transition cross beam 21 is arranged on the connecting line.
The method comprises the following steps of making a normal line or an angular bisector of a center line of a chord member 1 at an angle bisector of the center line of the steel truss arch bridge or an intersection point of the normal line and the center line of the chord member at a position where a curve of the steel truss arch bridge is widened and bent, and arranging a transition diaphragm 13 on the normal line or the angular bisector of the center line of the chord member 1; and the intersection point of the transition diaphragm plate 13 and the inner side of the chord member 1 and the corresponding point of the center line of the steel truss arch bridge at the curve widening bending part are taken as connecting lines, and a transition cross beam 21 is arranged on the connecting lines. Through reasonable design of the relative position relationship between chord member nodes and corresponding points of the line center line at the curve widening bending positions of the steel truss arch bridge and the structure of the bridge deck, the arrangement of the curve widening plate truss combined structure is realized, and the method can meet the line requirement of any 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 arch bridge can be improved.
In this embodiment, the center line of the steel truss arch bridge is a gentle curve or a circular curve on a plane, and the upstream and downstream sides of the structure are asymmetrically widened. And determining the center line of the chord member according to the center line of the steel truss arch bridge and the design width of the bridge structures at two sides. The designed width of the bridge structures on the two sides, namely the width of the functional design on the left side and the right side 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.
In this example, the span of the steel truss arch bridge is arranged as 132+408+132m, as shown in fig. 4, the steel truss arch is 90m high, the rise-span ratio is 1/4.533, the main truss adopts two pieces of trusses, the inner and outer sides of the two main trusses are provided with a connecting system, a roadway bridge surface system and a sidewalk bridge surface system, in order to join the existing road of a bank, the line center line is a gentle curve on one side span, and the bridge surface width is changed from 47m to 52.5 m.
When the center line of the steel truss arch bridge is a gentle curve or a circular curve on a plane, the center line of the chord member determined according to the center line of the steel truss arch bridge and the design width of the bridge structures at two sides is also a gentle curve or a circular curve. At the curve widening and bending part of the steel truss arch bridge, the intersection point of the normal line of the center line of the steel truss arch bridge and the center line of the chord member is taken as the normal line of the center line of the chord member, and the transition diaphragm plate 13 is arranged on the normal line of the center line of the chord member, so that the transition diaphragm plate 13 is approximately vertical to the inner and outer side webs of the chord member 1.
When the center line of the steel truss arch bridge is a bending line on a plane, the center line of the chord member determined according to the center line of the steel truss arch bridge and the design width of the bridge structures at two sides is also the bending line. At the curve widening bending position of the steel truss arch bridge, the intersection point of the angular bisector of the center line of the steel truss arch bridge and the center line of the chord member is used as the angular bisector of the center line of the chord member, and the transition diaphragm plate 13 is arranged on the normal line of the center line of the chord member, so that the angles of the transition diaphragm plate 13 and the inner and outer side webs of the chord member 1 are consistent, and the strength of the chord member 1 before and after bending is approximately equal.
Determining the position of the curve widening bending part of the steel truss arch bridge: the general basic width of the roadway deck (without additional functional sections), the widest width of the curved section and the overall dimensions of the main truss structure can be used to determine the distance between the centerlines of the two chords at the general basic width and the widest of the curved section. The center line of the steel truss arch bridge is offset, the offset distance respectively takes 1/2 common basic width and the distance of the center line of the two chords at the widest part of the curve section, the offset center line of the steel truss arch bridge and the side line of the deck of the roadway in the general line can generate a plurality of intersection points, and the main truss node near the intersection points is the setting position of the double-bending chord.
In some alternative embodiments, as shown in fig. 2 and 3, the two bending surfaces of each chord are planes obtained by translating (offsetting) the transitional diaphragms 13 on both sides of the normal direction by a set distance, and the two bending surfaces of each chord are provided with positioning diaphragms 14.
In this embodiment, the chord 1 further comprises a top plate 15 and a bottom plate 16, and the inner web 11, the outer web 12, the top plate 15 and the bottom plate 16 form a box-shaped structure.
The chord is divided into three surfaces by the two bending surfaces to form a double-bending chord, as shown in fig. 2, the double-bending chord comprises a surface A, a surface B and a surface C, the surface A is coplanar with the inclined web member 5, the surface B is coplanar with the plumb vertical rod 3, and the surface C is coplanar with the adjacent chord. In fig. 2, the transition diaphragm 13 is taken as a normal, and the width of the vertical bar 3 of the plumb bob is translated (offset) 1/2, the intersection points of the translated surface and the inner web 11 and the outer web 12 form bending surfaces, and the intersection angles of the two bending surfaces and the inner web 11 and the outer web 12 are web bending angles α 1 and α 2. And after blanking, the positioning partition plate 14 bends the plate out of the surface according to the bending position and the angles alpha 1 and alpha 2. In the example, the center lines of the steel truss arch bridge are homodromous curves, and alpha 1 and alpha 2 are more than 90 degrees and less than 180 degrees; if the center line of the steel truss arch bridge is a reverse curve, the bending angles alpha 1 and alpha 2 in the double-bending chord member can be reversed, namely, a certain angle can be larger than 180 degrees.
In some alternative embodiments, the two ends of the transition diaphragm 13 are respectively provided with a transverse connector 4 for connecting the transition beam 21 and a transverse connector 4 for connecting the pavement steel bridge deck.
In this embodiment, when manufacturing the chord member at the curved widened and bent portion of the steel truss arch bridge, the top plate 15 and the bottom plate 16 are disposed between the inner web 11 and the outer web 12 and are welded to the two positioning spacers 14, respectively, and the contact surfaces between the top plate 15 and the bottom plate 16 and the inner web 11 and the outer web 12 are required to be attached to the bending surfaces of the two positioning spacers 14. The transverse connecting member 4 is located outside the inner web 11 and the outer web 12 and is welded and fixed with the inner web 11 and the outer web 12, and the contact surface between the transverse connecting member 4 and the inner web 11 and the outer web 12 needs to be attached to the bending surface of the inner web 11 and the outer web 12. The transverse connecting piece 4 is used for connecting two ends of the transition diaphragm 13 with the transition beam 21 and the pavement steel bridge deck respectively and transmitting force to the chord member 1.
Referring again to fig. 1 to 3, in another aspect, the invention provides a method for designing a curve-widening steel truss arch bridge, comprising the following steps:
s1: and determining the center lines of all the chords 1 according to the center line of the steel truss arch bridge and the design width of the bridge structures at two sides.
In this embodiment, the center line of the steel truss arch bridge is a gentle curve or a circular curve on a plane, and the upstream and downstream sides of the structure are asymmetrically widened. And determining the center line of the chord member according to the center line of the steel truss arch bridge and the design width of the bridge structures at two sides. The height difference between the center line of all the steel truss arch bridges and the corresponding positions of the center lines of the chords on the two sides is designed to be equal height difference.
S2: at all curve widen buckling positions of steel truss arch bridge, the longitudinal bridge of inboard web 11 and outside web 12 of chord member 1 at the corresponding position all is equipped with the bending point that two intervals set up to, and the bending point of inboard web 11 and outside web 12 corresponding position forms a plane of buckling to make chord member 1 between two planes of buckling be used for connecting plumb bob montant 3.
The two bending surfaces are arranged on the chords at the positions where all curves of the steel truss arch bridge are widened, so that the steel truss arch bridge is bent according to design requirements, other members do not need to be bent, particularly, the plumb bob vertical rod 3 at the bent position does not need to be bent, and the design and manufacturing difficulty is reduced. 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.
For the condition that the center line of the steel truss arch bridge has a reverse curve in the span range, the chord member 1 at the position where the curve is widened is a double-bending chord member, the reverse change of the distance between the main trusses can be realized by adjusting the directions of included angles alpha 1 and alpha 2 of the three planes in the double-bending chord member, and the adaptability is wide.
In some alternative embodiments, the normal line or the angular bisector of the center line of the chord member 1 is made by the angular bisector or of the center line of the steel truss arch bridge at the curve widening bend or the intersection point of the normal line and the center line of the chord member 1, and the transition diaphragm 13 is arranged on the normal line or the angular bisector of the center line of the chord member 1.
In some optional embodiments, the intersection point of the transition diaphragm 13 and the inner side of the chord member 1 and the corresponding point of the center line of the steel truss arch bridge at the curve widening bending point are taken as a connecting line, and the transition beam 21 is arranged on the connecting line.
In some alternative embodiments, the plane of the transitional diaphragm 13 after being translated (offset) by a set distance on both sides of the normal direction is used as a bending plane, and a positioning diaphragm 14 is arranged on the bending plane.
Making a normal line or an angle bisector of the center line of the chord member 1 at the position where the curve of the steel truss arch bridge is widened and bent by using the angle bisector of the center line of the steel truss arch bridge or the intersection point of the normal line and the center line of the chord member, and arranging a transition diaphragm 13 on the normal line or the angle bisector of the center line of the chord member 1; and the intersection point of the transition diaphragm plate 13 and the inner side of the chord member 1 and the corresponding point of the center line of the steel truss arch bridge at the curve widening bending part are taken as connecting lines, and a transition cross beam 21 is arranged on the connecting lines. The arrangement of the curve widening plate-girder combined structure is realized by reasonably designing the relative position relationship between chord member nodes and line center line corresponding points at the curve widening bending part of the steel truss arch bridge and the structure of the bridge deck. 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 "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; 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 (10)
1. The utility model provides a curve widen steel purlin arched bridge which characterized in that includes:
the device comprises two main trusses arranged at intervals, wherein each main truss comprises a plurality of chords (1) connected in sequence, and each chord (1) comprises an inner web (11) and an outer web (12) arranged at intervals;
wherein, at all curve widen buckling point of steel purlin arched bridge, the corresponding position inboard web (11) and outside web (12) of chord member (1) upwards all are equipped with the bending point that two intervals set up at the longitudinal bridge, inboard web (11) and outside web (12) correspond the bending point of position and form a plane of buckling, two chord member (1) between the plane of buckling is used for connecting plumb bob montant (3).
2. The curved widening steel truss arch bridge according to claim 1, wherein a transition diaphragm (13) is arranged between the two bending surfaces of the chord (1), and two ends of the transition diaphragm (13) are respectively connected with the inner web (11) and the outer web (12).
3. The curve widening steel truss arch bridge according to claim 2, wherein a normal line or an angle bisector of the center line of the chord member (1) is made by taking an angle bisector or of the center line of the steel truss arch bridge at the curve widening bend or an intersection point of the normal line and the center line of the chord member (1), and a transition diaphragm (13) is arranged on the normal line or the angle bisector of the center line of the chord member (1).
4. The curved widening steel truss arch bridge as recited in claim 3, wherein: the transverse bridge is to two correspondences be equipped with decking (2) between chord member (1), be equipped with between two transition cross slab (13) that correspond transition crossbeam (21), with the crossing point of transition cross slab (13) and chord member (1) inboard with steel purlin arched bridge central line is in the connecting line is done to the corresponding point of curve widen buckling department, transition crossbeam (21) set up on the connecting line.
5. The curved widening steel truss arch bridge according to claim 4, wherein the two bending surfaces of each chord are planes formed by offsetting the transition diaphragm (13) at two sides of the normal direction of the transition diaphragm by a set distance, and the two bending surfaces of each chord are provided with positioning diaphragms (14).
6. The curved widening steel truss arch bridge according to claim 5, wherein the two ends of the transition diaphragm (13) are respectively provided with a transverse connector (4) for connecting the transition beam (21) and a transverse connector (4) for connecting the pavement steel bridge deck.
7. A design method of a curve widening steel truss arch bridge is characterized by comprising the following steps:
determining the center lines of all the chords (1) according to the center line of the steel truss arch bridge and the design width of bridge structures at two sides;
all the curved widening of steel purlin arched bridge is buckled the department, corresponding position the inboard web (11) of chord member (1) and the longitudinal bridge of outside web (12) are all to the bending point that all is equipped with two intervals and sets up, just the bending point that inboard web (11) and outside web (12) correspond the position forms a face of buckling, so that two chord member (1) between the face of buckling is used for connecting plumb bob montant (3).
8. The method for designing a curved widening steel truss arch bridge as recited in claim 7, wherein: and taking an angular bisector or of the center line of the steel truss arch bridge at the curve widening bending part or an intersection point of the normal line and the center line of the chord member (1) as a normal line or an angular bisector of the center line of the chord member (1), and arranging a transition diaphragm plate (13) on the normal line or the angular bisector of the center line of the chord member (1).
9. The method for designing a curved widening steel truss arch bridge as recited in claim 8, wherein: and (3) taking the intersection point of the transition diaphragm plate (13) and the inner side of the chord member (1) and the corresponding point of the center line of the steel truss arch bridge at the curve widening and bending part as a connecting line, and arranging a transition cross beam (21) on the connecting line.
10. The method of designing a curved widening steel truss arch bridge as recited in claim 9, wherein: and a plane of the transition diaphragm plate (13) after being deviated by a set distance on two sides in the normal direction is taken as a bending surface, and a positioning diaphragm plate (14) is arranged on the bending surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110529436.XA CN113279317B (en) | 2021-05-14 | 2021-05-14 | Curved line widening steel truss arch bridge and design method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110529436.XA CN113279317B (en) | 2021-05-14 | 2021-05-14 | Curved line widening steel truss arch bridge and design method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113279317A CN113279317A (en) | 2021-08-20 |
| CN113279317B true CN113279317B (en) | 2022-05-20 |
Family
ID=77279190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110529436.XA Active CN113279317B (en) | 2021-05-14 | 2021-05-14 | Curved line widening steel truss arch bridge and design method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113279317B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837058A (en) * | 2022-05-26 | 2022-08-02 | 中铁大桥局第七工程有限公司 | Curve widen truss bridge structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761026A (en) * | 2010-01-27 | 2010-06-30 | 中铁大桥勘测设计院有限公司 | Variable cross-section box type rod piece and application thereof |
| GB2485246A (en) * | 2010-11-05 | 2012-05-09 | John Reid & Sons Strucsteel Ltd | Bridge structure |
| CN203603021U (en) * | 2013-11-22 | 2014-05-21 | 中铁第四勘察设计院集团有限公司 | Asymmetrical arch rib structure adaptive to widened bridge floor |
| CN108265613A (en) * | 2018-03-23 | 2018-07-10 | 中铁二院工程集团有限责任公司 | A kind of steel reinforced concrete arch ring chord member construction of steel truss arch |
| CN111691298A (en) * | 2020-04-21 | 2020-09-22 | 中铁广州工程局集团有限公司 | Construction method for wide section of half-through arch bridge |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10190271B2 (en) * | 2015-10-13 | 2019-01-29 | University Of Notre Dame Du Lac | Adjustable modules for variable depth structures |
-
2021
- 2021-05-14 CN CN202110529436.XA patent/CN113279317B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761026A (en) * | 2010-01-27 | 2010-06-30 | 中铁大桥勘测设计院有限公司 | Variable cross-section box type rod piece and application thereof |
| GB2485246A (en) * | 2010-11-05 | 2012-05-09 | John Reid & Sons Strucsteel Ltd | Bridge structure |
| CN203603021U (en) * | 2013-11-22 | 2014-05-21 | 中铁第四勘察设计院集团有限公司 | Asymmetrical arch rib structure adaptive to widened bridge floor |
| CN108265613A (en) * | 2018-03-23 | 2018-07-10 | 中铁二院工程集团有限责任公司 | A kind of steel reinforced concrete arch ring chord member construction of steel truss arch |
| CN111691298A (en) * | 2020-04-21 | 2020-09-22 | 中铁广州工程局集团有限公司 | Construction method for wide section of half-through arch bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113279317A (en) | 2021-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107974917B (en) | A kind of bending node, curve continuous steel girder bridge and its design method | |
| CN110067185B (en) | Steel pipe-steel plate combined web steel-concrete combined box girder | |
| CN113279317B (en) | Curved line widening steel truss arch bridge and design method thereof | |
| CN210596977U (en) | Steel pipe-steel plate combined web steel-concrete combined box girder | |
| CN111648243A (en) | Method for assembling large sections of bolted and welded combined steel truss girder | |
| CN113279315B (en) | Plate-truss combined structure with widened curve on vertical curve and design method thereof | |
| KR100555248B1 (en) | The bridge construction method of having used an steel i beam girder to which rigidity increased and this | |
| CN216108020U (en) | Light steel-concrete combined beam structure | |
| CN111749114A (en) | Steel truss-UHPC combined beam bridge hogging moment area structure and construction method | |
| WO2011155645A1 (en) | Composite deck plate integrated with a bar truss and method for manufacturing same | |
| CN114626137B (en) | Method for obtaining large-span steel-concrete combined continuous beam bridge curve section steel truss girder | |
| CN215947856U (en) | Double-layer butterfly-shaped steel truss node | |
| CN211006301U (en) | Width-variable prefabricated segment assembling box beam bridge structure | |
| CN214783195U (en) | Guide beam for pushing steel box girder | |
| CN212714472U (en) | Steel truss-UHPC composite beam bridge hogging moment area structure | |
| CN111639372B (en) | Design method of variable-height truss bending node structure | |
| CN211947875U (en) | Cross beam connecting structure between corrugated web steel box and concrete composite beam box | |
| CN114626137A (en) | Method for acquiring curve section steel truss girder of large-span steel-concrete combined continuous beam bridge | |
| CN217518164U (en) | Keel and building column structure pouring template reinforcing system | |
| CN214739255U (en) | Variable-height truss girder with two solid web girder sections at two ends | |
| CN214005367U (en) | Steel box composite beam bridge structure with truss brace rod | |
| CN214573368U (en) | Shearing-resistant Bailey | |
| CN216074709U (en) | Space double-helix steel structure bridge | |
| CN214738768U (en) | Truss girder with solid web girder section variable in height | |
| CN214882877U (en) | Continuous small box girder structure adopting combined section in hogging moment area |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |