CN104900136B - A kind of experiment cable-stayed bridge and installation method - Google Patents
A kind of experiment cable-stayed bridge and installation method Download PDFInfo
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- CN104900136B CN104900136B CN201510288934.4A CN201510288934A CN104900136B CN 104900136 B CN104900136 B CN 104900136B CN 201510288934 A CN201510288934 A CN 201510288934A CN 104900136 B CN104900136 B CN 104900136B
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- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/04—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of buildings
Abstract
The present invention relates to bridge testing technical field, more particularly to a kind of experiment cable-stayed bridge and installation method.The experiment cable-stayed bridge includes horizontally disposed girder, the shear wall and multiple skew cables that are vertically arranged, the both ends of multiple skew cables respectively with girder and shear wall anchor connection；Multigroup built-in fitting is embedded with into certain intervals in girder, every group of built-in fitting is removably connected with connecting plate, connecting plate and suspension cable anchor connection.The experiment effectively reduces the scale, loading difficulty and testing expenses of experiment with cable-stayed bridge, it is possible to increase the reduced scale of model, and disassembly and assembly can be easily carried out, beneficial to the levelling of Suo Li in experiment；Main beam structure need not be damaged during installation, suspension cable can be effectively avoided to intersect with the prestress pipe in girder, and do not change girder overall stress and suspension cable by power path, can real simulation girder and suspension cable stress performance, the stress performance and ultimate resistance strength of suspension cable and girder under stress after accurate simulation girder cracking.
Description
Technical field
The present invention relates to bridge testing technical field, more particularly to a kind of experiment cable-stayed bridge and installation method.
Background technology
Cable-stayed bridge has the characteristics that handsome in appearance, span ability is strong, span setting is flexible and construction interference is few, and with good
Good mechanical property and economic indicator.Therefore, since the fifties in last century, modern cable-stayed bridge is quickly grown, and across footpath constantly increases
Greatly, the development of structure type increasingly tends to diversification.In laboratory in order to preferably study cable-stayed bridge stress performance, it is necessary to
The stressing conditions of cable-stayed bridge are truly reduced in laboratory.
At present, Cable-stayed Bridge Model experiment is more complicated in scientific research and testing, and stress performance is complicated, predominantly bending component, often
In the small scale scale (model) test of rule, the anchorage style one of half-bridge or full-bridge scaled model, suspension cable and girder is typically done
As be directly anchored at the beam bottom of girder, the anchorage style of suspension cable and king-tower is typically directly anchored above king-tower, general simulation
The stress performance of the elastic stage of cable-stayed bridge reality bridge.For in large scale scale (model) test, typically doing cable-stayed bridge Segment Model
Experiment, the analog form of suspension cable can be divided into several：(1) stress of suspension cable is decomposed into horizontal component and vertical force component, water
Divide power equally to simulate using stretch-draw prestressing force steel strand wires, vertical force component and vertical supporting rigidity are simulated using resilient support, therefore need not
King-tower and suspension cable are simulated, need to only simulate the stress of girder；(2) suspension cable is using steel strand wires simulation or parallel wire unit mould
Intend, suspension cable is directly anchored at the back side of king-tower, and suspension cable is anchored at the lower edge of girder, general to simulate 1/4 bridge model, therefore needs
Powerful king-tower is established, and perforate anchors suspension cable on girder, it is larger.
Tested for small scale Cable-stayed Bridge Model, its elastic force balance performance for cable-stayed bridge system simulated, due to size
Effect and material using different, so the elastic system stress performance that suspension cable after simulation cracking supports or can not be difficult to,
And the ultimate resistance strength of structural system can not be learnt.For large scale cable-stayed bridge scaled model, the stress of suspension cable is propped up using elasticity
Hold and simulated with tension steel strand, simulate the stress under the elastic system of girder to a certain extent, but be difficult accurate simulation master
Beam cracking after stress performance, and it is more difficult simulation cracking after suspension cable stress performance；Suspension cable is straight in cable-stayed bridge scaled model
Connect and be anchored at king-tower and girder lower edge, it is necessary to establish half-bridge model or 1/4 bridge model, for half-bridge model, overall size and
Difficulty is too big, and testing expenses are too high；1/4 bridge model overall size is still very big, and needs to design powerful king-tower, can not simulate
The true stress of king-tower；Suspension cable is anchored at girder lower edge, must be that girder section uses total cross-section, horizontal scale is not subtracted
Small and perforate need to cause to damage on girder, experiment is further applied load not to be reduced with expense.
The content of the invention
(1) technical problems to be solved
The technical problem to be solved in the present invention is to provide a kind of experiment cable-stayed bridge and installation method, is contracted for large scale
Chi model test, do not change in test Cable stress path, girder entirety stress, girder is not caused to damage and be oblique pull
On the premise of rope provides reliable anchoring, reduce the lateral dimension of model, reduce the vertical and horizontal scale of block mold, reduce examination
The design and loading difficulty tested, reduce the spending of testing expenses, after elasticity and the cracking that can be easier to realize large-scale model
Bearing capacity stress test is studied.
(2) technical scheme
In order to solve the above-mentioned technical problem, the invention provides a kind of experiment cable-stayed bridge, including horizontally disposed girder,
The shear wall and multiple skew cables being vertically arranged, the both ends of the more suspension cables connect with the girder and shear wall anchoring respectively
Connect；Multigroup built-in fitting is embedded with into certain intervals in the girder, built-in fitting described in every group is removably connected with connecting plate,
The connecting plate and suspension cable anchor connection.
Wherein, the built-in fitting includes two pre embedded bolts be arrangeding in parallel, one end difference of two pre embedded bolts
It is embedded in the girder, the other end is connected with the connecting plate, and the suspension cable passes through anchoring piece and the connecting plate anchor
It is solidly connected；
Wherein, the angle between the pre embedded bolt and girder is equal to the angle between the suspension cable and girder.
Wherein, the both ends of the connecting plate are respectively provided with the connecting hole for being fixedly connected with the pre embedded bolt, the company
The centre of fishplate bar is provided with the anchor hole being used for the suspension cable anchor connection.
Wherein, multiple nuts for being used to strengthen the breakout capacity of the pre embedded bolt, institute are set with outside the pre embedded bolt
Nut is stated in the girder.
Wherein, truss group is fixed with the shear wall, the position of the truss group is higher than the position of the girder；It is described
Suspension cable passes through the truss group and the shear wall anchor connection.
Wherein, the truss group is fixed including column, anchoring tooth block and two groups of supporting constructions, one end of the supporting construction
In on the shear wall, the other end is fixedly connected by the column, and the anchoring tooth block is installed on the column, for anchor
It is solidly connected the suspension cable.
Wherein, the suspension cable passes through anchorage and the anchoring tooth block anchor connection；Between the anchorage and anchoring tooth block
It is additionally provided with the rope meter for monitoring the suspension cable anchoring status.
Wherein, the supporting construction includes the first boom, the second boom and the 3rd boom, first boom and the second purlin
One end of bar is parallel respectively to be fixed on the shear wall, and is respectively perpendicular to the shear wall, and the other end passes through described vertical
Post is fixedly connected；Second boom is fixedly connected with one end that column is fixed by the 3rd boom with shear wall；It is described
It is at an angle of and sets between 3rd boom and the shear wall.
Wherein, the suspension cable is steel strand wires, and quantity is 1~3；The section of the girder is T-shaped, first purlin
The section of bar, the second boom and the 3rd boom is enclosing square section；The grade of the pre embedded bolt is 8.8~12.9 grades, number
Measure as two, diameter specifications are M20~M36；The material of the connecting plate is steel, and thickness is 30~50mm, quantity with it is described tiltedly
The quantity of drag-line is identical；The anchoring piece anchors for p-type；The material of the anchoring tooth block be steel, coupling part thickness for 20~
30mm；The anchorage is 1~3 hole；The dynamometry scope of the rope meter is 20t~100t.
Present invention also offers a kind of installation method of experiment cable-stayed bridge, comprise the following steps：
S1, positioned in girder and bury pre embedded bolt in advance；
S2, the assembled truss group on shear wall；
S3, the length to suspension cable carry out blanking, and carry out sleeve extruding, connection anchoring element to its lower end；
S4, in plane and locus to the girder carry out relative positioning, and anchor axial Compact Mounts and
Horizontal limit devices, the girder are arranged on level ground by resilient support；
S5, the anchor hole by the one end of the suspension cable equipped with the anchoring piece through connecting plate, the other end are installed successively
There are pad, rope meter, pad and anchorage, be then anchored in the truss group.
S6, one end for being installed with the connecting plate of the suspension cable drawn to the position of the pre embedded bolt on the girder
Put, a nut on each set, the company on the connecting plate is each passed through by the pre embedded bolt on two pre embedded bolts
After connecing hole, it is attached, is tightened and leveling by the nut.
S7, tensioning pretension is carried out by suspension cable described in jack pair in the truss group, make the suspension cable and master
Beam forms rigidity system.
(3) beneficial effect
The above-mentioned technical proposal of the present invention has the advantages that：
(1) a kind of experiment of the invention replaces king-tower structure with cable-stayed bridge using shear wall, passes through suspension cable anchor with girder
It is solidly connected, while the girder section is laterally reduced half, without by the especially powerful of king-tower structure design, you can effectively
The reliable anchoring of suspension cable is realized, reduces the scale, loading difficulty and testing expenses of experiment, and the reduced scale of model can be increased
Ratio.
(2) multigroup built-in fitting is embedded with into certain intervals in girder, every group of built-in fitting is removably connected with connection
Plate, connecting plate and suspension cable anchor connection, without damaging main beam structure, it is possible to prevente effectively from suspension cable and the prestressing force in girder
Pipeline monitor, and do not change girder overall stress and suspension cable by power path.
(3) girder using resilient support, can preferably real simulation girder and suspension cable under elastic force balance state
Stress performance, it can also accurately simulate after girder cracking the stress performance and the limit of suspension cable and girder under stress
Drag.
(4) connecting plate and pre embedded bolt are removably connected so that the experiment can be dismantled easily with cable-stayed bridge
And assembling, beneficial to the levelling of Suo Li in experiment.
Brief description of the drawings
Fig. 1 is the front view of the experiment cable-stayed bridge of the embodiment of the present invention；
Fig. 2 be Fig. 1 A to sectional view；
Fig. 3 is the front view of the truss group of the embodiment of the present invention；
Fig. 4 be Fig. 3 B to sectional view；
Fig. 5 is the front view of the connecting plate of the embodiment of the present invention；
Fig. 6 is the top view of the connecting plate of the embodiment of the present invention.
Wherein, 1, suspension cable；2nd, girder；3rd, pre embedded bolt；4th, truss group；5th, shear wall；6th, the first bolt；7th, connect
Plate；8th, anchoring piece；9th, nut；10th, prestressing force is restrained；11st, rope meter；12nd, anchorage；13rd, pad；14th, the first boom；15th, stand
Post；16th, the second boom；17th, the 3rd boom；18th, the second bolt；19th, tooth block is anchored；20th, anchor hole；21st, connecting hole.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are used for
Illustrate the present invention, but can not be used for limiting the scope of the present invention.
In the description of the invention, unless otherwise indicated, " multiple " are meant that two or more；Unless otherwise saying
Bright, the implication of " nick shaped " is the shape in addition to section is concordant.Term " on ", " under ", "left", "right", " interior ", " outer ", " preceding
End ", " rear end ", " head ", the orientation of the instruction such as " afterbody " or position relationship be based on orientation shown in the drawings or position relationship,
Be for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ",
" second ", " 3rd " etc. are only used for describing purpose, and it is not intended that instruction or hint relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary.For this
For the those of ordinary skill in field, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As shown in figure 1, a kind of experiment cable-stayed bridge of the present embodiment includes horizontally disposed girder 2, cutting of being vertically arranged
Power wall 5 and multiple skew cables 1, the both ends of multiple skew cables 1 utilize shear wall 5 respectively with girder 2 and the anchor connection of shear wall 5
Instead of king-tower structure.The suspension cable 1 of the present embodiment is steel strand wires, and quantity is 1~3, and the section of girder 2 is T-shaped, makes girder 2
Section while can laterally reduce half, without by the especially powerful of king-tower structure design, you can effectively realize suspension cable 1
Reliable anchoring, reduce scale, the loading difficulty and testing expenses of experiment, and the reduced scale of model can be increased.Girder 2
Both ends stood on using resilient support on level ground, can preferably real simulation girder 2 and suspension cable 1 in elastic force balance shape
Stress performance under state, it can also accurately simulate after girder 2 ftractures the stress of suspension cable 1 and girder 2 under stress
Performance and ultimate resistance strength.
In the experiment cable-stayed bridge of the present embodiment, anchor structure of the suspension cable 1 respectively between shear wall 5 and girder 2 can
It is divided into upper end anchor structure and anchoring lower ends structure.
Anchor structure of the anchoring lower ends structure between suspension cable 1 and girder 2.In the present embodiment, into certain in girder 2
Interval is embedded with multigroup built-in fitting, and every group of built-in fitting is removably connected with connecting plate 7, and connecting plate 7 connects with the anchoring of suspension cable 1
Connect.It is embedded with more prestressing force tube banks 10 vertically in girder 2, the setting of built-in fitting causes when suspension cable 1 is installed without damage
Hinder the structure of girder 2, it is possible to prevente effectively from suspension cable 1 intersects with the prestressing force tube bank 10 in girder 2, and do not change the whole of girder 2
Body stress and suspension cable 1 by power path；Removably connected between built-in fitting and connecting plate 7 so that the experiment cable-stayed bridge
Disassembly and assembly can be easily carried out, beneficial to the levelling of Suo Li in experiment.
As shown in Fig. 2 in order to ensure the stable connection between every group of built-in fitting and connecting plate 7, built-in fitting is preferably two
The pre embedded bolt 3 be arrangeding in parallel, it shown in Fig. 1 is the A of section to sectional view using the place plane of pre embedded bolt 3 that Fig. 2, which is, pre-buried
The grade of screw rod 3 is preferably 8.8~12.9 grades, and quantity is two, and diameter specifications are M20~M36；The one of two pre embedded bolts 3
End is embedded in girder 2 respectively, and the other end is connected with connecting plate 7, and suspension cable 1 is connected by anchoring piece 8 and the anchoring of connecting plate 7
Connect, the material of connecting plate 7 is steel, and thickness is 30~50mm, and quantity is identical with the quantity of suspension cable 1；Anchoring piece 8 is preferably p-type
Anchoring, is easy to the connection of suspension cable 1 and pre embedded bolt 3.
As shown in Figure 5, Figure 6, the both ends of connecting plate 7 are respectively provided with the connecting hole 21 for being fixedly connected with pre embedded bolt 3, even
The centre of fishplate bar 7, which is provided with, is used for anchor hole 20 with the anchor connection of suspension cable 1, the preferably a diameter of 17mm of anchor hole 20, during anchoring
After one end of suspension cable 1 passes through the anchor hole 20 on connecting plate 7, connecting plate 7 is anchored on suspension cable 1 by anchoring piece 8；Together
When, two pre embedded bolts 3 are each passed through the connecting hole 21 at the both ends of connecting plate 7, will even using the cooperation of pre embedded bolt 3 and nut 9
Fishplate bar 7 is fixedly connected with pre embedded bolt 3, it is achieved thereby that the anchor connection of pre embedded bolt 3 and suspension cable 1；Pre embedded bolt 3 and company
Cooperation between fishplate bar 7 can be with disassembly and assembly so that suspension cable 1 at the trial can convenient assembly and disassembly, profit
The Suo Li levelling in experiment.
In order to strengthen the breakout capacity of pre embedded bolt 3, the part being embedded in outside pre embedded bolt 3 in girder 2 is also set with
Multiple nuts 9.
It is preferred that the angle between pre embedded bolt 3 and girder 2 is equal to the angle between suspension cable 1 and girder 2, then synthesis is examined
Consider vertical displacement, the relative rotation of girder 2 and the cable sag effect of suspension cable 1 of experiment process middle girder 2, can effectively avoid tiltedly
Drag-line 1 and prestressing force tube bank 10 are intersecting, cause to damage without carrying out perforate on girder 2.
The pre-buried angle of pre embedded bolt 3 on the basis of the angle identical with suspension cable 1, consider girder 2 displacement,
The cable sag effect of suspension cable 1 and the relative rotation of girder 2 carry out pre embedded bolt 3 and corrected.
The lower anchor structure of the suspension cable 1 can be mounted and dismounted easily by nut 9, be especially suitable for laboratory
The Experiment of Mechanical Behavior of bad domestic simulation large scale cable-stayed bridge scaled model member structure, can be risen by artificial and laboratory
Weight loop wheel machine coordinating operation, you can easily carry out large complicated rope girder construction experiment.
Anchor structure of the upper end anchor structure between suspension cable 1 and shear wall 5.In the present embodiment, lead on shear wall 5
Cross the first bolt 6 and be fixed with truss group 4, as shown in Figure 3, Figure 4, the position of truss group 4 is higher than the position of girder 2, oblique to ensure
Certain angle is formed between drag-line 1 and girder 2；Suspension cable 1 passes through truss group 4 and the anchor connection of shear wall 5.
In order to ensure that the tensile capacity of truss group 4 and load capability can meet test requirements document, preferably truss group 4 includes vertical
Post 15, anchoring tooth block 19 and two groups of supporting constructions, one end of supporting construction are fixed on shear wall 5, and the other end passes through column 15
It is fixedly connected, anchoring tooth block 19 is installed on column 15, for anchor connection suspension cable 1；
Further, in order to improve the stability of truss group 4, the present embodiment is preferably the two groups of support be arrangeding in parallel knots
Structure, the first boom 14 of supporting construction is parallel with one end of the second boom 16 to be fixed on shear wall 5, and is each perpendicular to cut
Power wall 5, the other end are fixedly connected by column 15；One end that second boom 16 is fixed with column 15 is by the 3rd boom 17 with cutting
Power wall 5 is fixedly connected；It is at an angle of and sets between 3rd boom 17 and shear wall 5；First boom 14, the second boom 16 and the 3rd purlin
The section of bar 17 is preferably enclosing square section；Fixed and connected by column 15 between first boom 14 of this two groups of supporting constructions
Connecing, the second boom 16 is also fixedly connected in addition to being connected by column 15 by multiple transverse connecting rod (not shown)s, and
Lower end with column 15 is connected, and the 3rd boom 17 is fixedly connected by horizontal diagonal brace (not shown).Each portion of truss group 4
Part is connected by the second bolt 18, and the second bolt 18 is high-strength bolt, and truss group 4 is connected by connecting screw with shear wall 5,
Connecting screw is preferably M48~M52 common screw.
The suspension cable 1 of the present embodiment passes through anchorage 12 and the anchor connection of anchoring tooth block 19；Anchorage 12 and anchoring tooth block 19 it
Between be additionally provided with the rope meter 11 of anchoring status for monitoring suspension cable 1, pad is also set between anchorage 12 and rope meter 11
Piece 13.Specifically, the material for anchoring tooth block 19 is steel, and thickness is 20~30mm；Anchorage 12 is 1~3 hole, using intermediate plate anchoring side
Formula；The dynamometry scope of rope meter 11 is 20t~100t, for measuring the horizontal force of suspension cable 1.
Bearing plate (not shown) is provided with anchoring tooth block 19, suspension cable 1 is connected with bearing plate by anchorage 12, held
Pressing plate preferably uses steel plate of the thickness for 40~50mm, and the anchoring angle of bearing plate is being kept and the angle vertical of suspension cable 1
On the basis of, consider the displacement of girder 2 and the cable sag effect of suspension cable 1 carries out bearing plate angle modification.
Used for the ease of experiment, the suspension cable 1 of the present embodiment is similar to be equivalent toSingle steel strand is simulated,
Girder 2 is similar equivalent and horizontal reduced scale 1/2 uses T section (the model likelihood ratio is 7.423), king-tower structure by with shear wall 5
Connected truss group 4 is simulated, suspension cable 1 and girder 2 connect through 8.8 grades of M20 pre embedded bolts 3 and connecting plate 7 uses screw rod
Nut is connected, and rope meter 11 and suspension cable 1 are fixed anchor by anchoring of the suspension cable 1 in truss group 4 using single hole anchor device 12
Gu in truss group.
8.8 grades of M20 of the use of pre embedded bolt 3 high-strength bolt, its pre-buried angle are identical with the anchoring of suspension cable 1 angle in guarantee
On the premise of, consider the sag effect of the vertical displacement of experiment process middle girder 2, the relative rotation of girder 2 and suspension cable 1
Should, it can effectively avoid suspension cable 1 and prestressing force tube bank 10 is intersecting, cause to damage without perforate is carried out on girder 2；Connection
Plate 7 uses steel plate of the thickness for 40mm, for connecting and anchoring suspension cable 1 and pre embedded bolt 3.Anchoring piece 8 is mainly to oblique pull
The end of rope 1 carries out sleeve extruding and forms p-type anchoring, is easy to the connection of suspension cable 1 and pre embedded bolt 3.
All parts of truss group 4 are all using the box-type section remained silent, one end welding of the horizontal diagonal brace not shown in figure
In the junction of the second boom 16 and column 15, the other end is anchored on shear wall 5；The thickness of shear wall 5 is 80cm；Anchor tooth
The spacing of screw on block 19 for anchor connection suspension cable 1 is 50cm × 50cm, and screwhole diameter isFirst bolt
For M48mm, its drag about 50t；Rope meter 11 is respectively used to both sides two with using the 20t and 30t of demarcation rope meter 11
Between on three skew cables 1, during being tested with accurate measurement under each operating mode suspension cable 1 Suo Li；Anchorage 12 is using single
The secondary anchorage in hole；Pad 13 is thick, a diameter of using 2cmCircular steel plate, diameter of bore 17mm.
The present embodiment also proposed a kind of installation method of experiment cable-stayed bridge, comprise the following steps：
S1, positioned in girder 2 and bury pre embedded bolt 3 in advance；
S2, the assembled truss group 4 on shear wall 5；
S3, the length to suspension cable 1 carry out blanking, and carry out sleeve extruding, connection anchoring element 8 to its lower end；
S4, relative positioning is carried out to girder 2 in plane and locus, and anchor axial Compact Mounts and transverse direction
Stopping means；
S5, the anchor hole 20 by the one end of suspension cable 1 equipped with anchoring piece 8 through connecting plate 7, the other end are sequentially installed with pad
Piece 13, rope meter 11, pad 13 and anchorage 12, are then anchored in truss group 4.
S6, one end for being installed with connecting plate 7 of suspension cable 1 drawn to the position of the pre embedded bolt 3 on girder 2, at two
A nut 9 is respectively put on pre embedded bolt 3, after pre embedded bolt 3 to be each passed through to the connecting hole 21 on connecting plate 7, passes through nut 9
It is attached, tightens and leveling.
S7, tensioning pretension is carried out by jack pair suspension cable 1 in truss group 4, suspension cable 1 and girder 2 is formed just
Degree system.
In summary, the experiment of the present embodiment is truss by being anchored on shear wall 5 with cable-stayed bridge and installation method
The simulation king-tower structure of group 4, without half-bridge structure is simulated in test, only need to simulate main bridge localized stage model, effective to reduce
The overall size of model, reduces the design, making and loading difficulty of experiment, while has reached expected equivalent stress performance
Target, significantly reduce the expense of experiment；Pre embedded bolt 3 is set in girder 2, passes through connecting plate 7 and the anchor connection of anchoring piece 8
Mode make the anchor connection suspension cable 1 of pre embedded bolt 3, effectively avoid prestressing force in suspension cable 1 and girder 2 and restrain 10 phases
Hand over, realize the laterally reduction half of girder 2, reduce further the scale of experiment, while without the perforate on girder 2, allow tiltedly
Drag-line 1 is anchored at beam bottom, to girder 2 without any damage, do not change suspension cable 1 by power path, while ensure that girder 2
Overall stress, further reduce loading load size, reduce experiment loading difficulty, reduce experiment expense and into
This.Girder 2, can the preferable stress of real simulation girder 2 and suspension cable 1 under elastic force balance state using resilient support
Can, the stress performance and the limit that can also accurately simulate suspension cable 1 and girder 2 under stress after girder 2 ftractures resist
Power.Connecting plate 7 and pre embedded bolt 3 removably connect so that and the experiment can easily carry out disassembly and assembly with cable-stayed bridge,
Beneficial to the levelling of Suo Li in experiment.
Embodiments of the invention provide for the sake of example and description, and are not exhaustively or by this to send out
It is bright to be limited to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Choosing
Select and describe embodiment and be to more preferably illustrate the principle and practical application of the present invention, and make one of ordinary skill in the art
It will be appreciated that the present invention is so as to designing the various embodiments with various modifications suitable for special-purpose.
Claims (10)
- A kind of 1. experiment cable-stayed bridge, it is characterised in that including horizontally disposed girder (2), the shear wall (5) being vertically arranged and Multiple skew cables (1), the both ends of the more suspension cables (1) respectively with the girder (2) and shear wall (5) anchor connection, institute State shear wall (5) to be used to replace king-tower structure, the both ends of the girder (2) are stood on level ground using resilient support, are used for Simulate main bridge localized stage；Multigroup built-in fitting is embedded with into certain intervals in the girder (2), built-in fitting described in every group is removable That unloads is connected with connecting plate (7), the connecting plate (7) and suspension cable (1) anchor connection.
- 2. experiment cable-stayed bridge according to claim 1, it is characterised in that what the built-in fitting be arranged in parallel including two Pre embedded bolt (3), one end of two pre embedded bolts (3) are embedded in the girder (2) respectively, the other end with the company Fishplate bar (7) connects, and the suspension cable (1) passes through anchoring piece (8) and the connecting plate (7) anchor connection；Angle between the pre embedded bolt (3) and girder (2) is equal to the angle between the suspension cable (1) and girder (2).
- 3. experiment cable-stayed bridge according to claim 2, it is characterised in that the both ends of the connecting plate (7) are respectively equipped with For being fixedly connected with the connecting hole (21) of the pre embedded bolt (3), the centre of the connecting plate (7), which is provided with, to be used for and the oblique pull The anchor hole (20) of rope (1) anchor connection.
- 4. experiment cable-stayed bridge according to claim 2, it is characterised in that be set with outside the pre embedded bolt (3) multiple For the nut (9) for the breakout capacity for strengthening the pre embedded bolt (3), the nut (9) is in the girder (2).
- 5. experiment cable-stayed bridge according to claim 2, it is characterised in that be fixed with truss group on the shear wall (5) (4), the position of the truss group (4) is higher than the position of the girder (2)；The suspension cable (1) by the truss group (4) with Shear wall (5) anchor connection.
- 6. experiment cable-stayed bridge according to claim 5, it is characterised in that the truss group (4) includes column (15), anchor Permanent tooth block (19) and two groups of supporting constructions, one end of the supporting construction are fixed on the shear wall (5), and the other end passes through institute State column (15) to be fixedly connected, the anchoring tooth block (19) is installed on the column (15), for oblique pull described in anchor connection Rope (1).
- 7. experiment cable-stayed bridge according to claim 6, it is characterised in that the suspension cable (1) by anchorage (12) with Described anchoring tooth block (19) anchor connection；It is additionally provided between the anchorage (12) and anchoring tooth block (19) for monitoring the oblique pull The rope meter (11) of rope (1) anchoring status.
- 8. experiment cable-stayed bridge according to claim 7, it is characterised in that the supporting construction includes the first boom (14) one end difference of, the second boom (16) and the 3rd boom (17), first boom (14) and the second boom (16) is parallel Be fixed on the shear wall (5), and be respectively perpendicular to the shear wall (5), it is fixed that the other end passes through the column (15) Connection；Second boom (16) one end fixed with column (15) is fixed by the 3rd boom (17) and shear wall (5) Connection；It is at an angle of and sets between 3rd boom (17) and the shear wall (5).
- 9. experiment cable-stayed bridge according to claim 8, it is characterised in that the suspension cable (1) is steel strand wires, and quantity is 1~3；The section of the girder (2) is T-shaped, the section of first boom (14), the second boom (16) and the 3rd boom (17) For enclosing square section；The grade of the pre embedded bolt (3) is 8.8~12.9 grades, and quantity is two, and diameter specifications are M20~M36；The material of the connecting plate (7) is steel, and thickness is 30~50mm, and quantity is identical with the quantity of the suspension cable (1)；The anchoring piece (8) anchors for p-type；The material of the anchoring tooth block (19) is steel, and thickness is 20~30mm；The anchorage (12) is 1~3 hole；The dynamometry scope of the rope meter (11) is 20t~100t.
- A kind of 10. installation method of experiment cable-stayed bridge according to any one of claim 1~9, it is characterised in that including Following steps：S1, positioned in girder (2) and bury pre embedded bolt (3) in advance；S2, the assembled truss group (4) on shear wall (5)；S3, the length to suspension cable (1) carry out blanking, and carry out sleeve extruding, connection anchoring element (8) to its lower end；S4, relative positioning is carried out to the girder (2) in plane and locus, and anchor axial Compact Mounts and horizontal stroke To stopping means, the girder (2) is arranged on level ground by resilient support；S5, by the suspension cable (1) equipped with the anchoring piece (8) one end pass through connecting plate (7) anchor hole (20), the other end Rope meter (11), pad (13) and anchorage (12) are sequentially installed with, is then anchored on the truss group (4)；S6, one end for being installed with the connecting plate (7) of the suspension cable (1) drawn to the pre embedded bolt on the girder (2) (3) position, a nut (9) is respectively put on two pre embedded bolts (3), the pre embedded bolt (3) is each passed through After connecting hole (21) on the connecting plate (7), it is attached, is tightened and leveling by the nut (9)；S7, tensioning pretension is carried out by suspension cable described in jack pair (1) on the truss group (4), make the suspension cable (1) Rigidity system is formed with girder (2).
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| CN110031163B (en) * | 2019-03-22 | 2020-03-17 | 天津大学 | Modular steel-concrete combined bridge model and method for bridge damage identification test |
| CN110211481A (en) * | 2019-06-04 | 2019-09-06 | 大连海事大学 | A kind of experiment teaching system and its application method can be used for CONSTRUCTION OF CABLE-STAYED BRIDGE control demonstration |
| CN110700072B (en) * | 2019-11-08 | 2021-03-26 | 中国矿业大学 | Method for installing stay cable of cable-stayed bridge reduced scale test model |
| CN111175068B (en) * | 2020-02-24 | 2021-11-23 | 长沙理工大学 | Method for typical damage simulation device of cable-stayed bridge |
| CN114061878A (en) * | 2021-11-19 | 2022-02-18 | 江苏科技大学 | Device for cable-beam coupling vibration test |
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