CN109750791A - A kind of assembled large overhanging steel structure - Google Patents

A kind of assembled large overhanging steel structure Download PDF

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Publication number
CN109750791A
CN109750791A CN201910046655.5A CN201910046655A CN109750791A CN 109750791 A CN109750791 A CN 109750791A CN 201910046655 A CN201910046655 A CN 201910046655A CN 109750791 A CN109750791 A CN 109750791A
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CN
China
Prior art keywords
steel
ontology
girder steel
prestressed cable
plate
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Pending
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CN201910046655.5A
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Chinese (zh)
Inventor
徐成荣
江山
金磊
王静峰
胡舜
王新乐
黄星海
高翔
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Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
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Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority date (The priority date 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 date listed.)
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Application filed by Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd filed Critical Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority to CN201910046655.5A priority Critical patent/CN109750791A/en
Publication of CN109750791A publication Critical patent/CN109750791A/en
Pending legal-status Critical Current

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Abstract

The present invention relates to a kind of assembled large overhanging steel structures.The present invention includes i-shape steel beam ontology and prestressed cable, girder steel ontology includes the endpiece being sequentially arranged along girder steel ontology span direction, interlude and overhanging section, endpiece is bolted to connection with interlude and interlude with overhanging section respectively, the web two sides of girder steel ontology are equipped with the prestressed cable being disposed to extend along girder steel ontology span direction, and prestressed cable is anchored by the anchorage at girder steel ontology both ends to realize and apply prestressing force to girder steel ontology.The present invention greatly reduces overhead welding workload, installation difficulty is small, construction period is short, safety of structure is high, the effectively stress and consolidating settlement of control steel construction, reasonably applying prestressing force to girder steel ontology using prestressed cable at the same time can adjust the deformation of girder steel body construction and stress distribution, improve girder steel ontology bearing capacity, steel using amount is effectively reduced, realizes that long span structure is crossed over.

Description

A kind of assembled large overhanging steel structure
Technical field
The present invention relates to steel structure technology fields, are specifically related to a kind of assembled large overhanging steel structure.
Background technique
At present in many large overhanging steel structure engineerings at home, welding engineering amount is very great, a large amount of in order to guarantee The safety of overhead welding operation needs the risk factors such as effective control high falling, electric shock, fire, object strike, true Welding quality must be ensured under the premise of protecting overhead welding operation safety, while avoiding the generation of accident.Due to that can be produced when welding Raw residual stress and residual deformation, residual stress can be such that the deformation increase of component, rigidity reduces, to reduce the carrying energy of component Power, under cryogenic, can also acceleration means brittle break.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of assembled large overhanging steel structures.The structure can be effective Ground reduces the drawbacks of girder steel welded connecting is brought, and greatly reduces overhead welding workload and controls stress and the deformation of steel construction Sedimentation, reasonable stress and the safety of structure can be optimized by being simutaneously arranged prestressed cable, improved bearing capacity, effectively reduced use Steel amount realizes that long span structure is crossed over.
To achieve the above object, the invention adopts the following technical scheme:
A kind of assembled large overhanging steel structure, including large cantilever girder steel, the large cantilever girder steel include i-shape steel beam sheet Body and prestressed cable, the girder steel ontology include the endpiece being sequentially arranged along girder steel ontology span direction, interlude and Overhang section, the endpiece is bolted to connection with interlude and interlude with overhanging section respectively, the girder steel ontology Web two sides are equipped with the prestressed cable being disposed to extend along girder steel ontology span direction, and the prestressed cable passes through steel The anchorage at beam ontology both ends is anchored to realize and apply prestressing force to girder steel ontology.
Further technical solution: it is fixed on the web of the girder steel ontology multiple along girder steel ontology span direction interval Arrangement and cord clip tool for installing the prestressed cable, cord clip tool include the first installation unit being arranged symmetrically and Second installation unit, first installation unit, the second installation unit respectively include mounting plate and with mounting plate one Molding clamping plate, the clamping plate include arc-shaped twisted plate section, the mounting plate of first installation unit, the second installation unit It is parallel with the web respectively to fix, institute after the clamping plate of first installation unit and the clamping plate of the second installation unit are fixed to each other The twisted plate section of the twisted plate section and the second installation unit of stating the first installation unit is formed leads to for what the prestressed cable passed through Road is also welded with the support plate for reinforcing mounting plate Yu clamping plate bonding strength between the mounting plate and clamping plate.
Further technical solution: the structure further includes the Self-resetting FRP- steel pipe combination steel column vertically installed and inclines Three buckling restrained braces being tiltedly mounted on the Self-resetting FRP- steel pipe combination steel column, the Self-resetting FRP- steel pipe Mould assembly steel column provides support by the buckling restrained brace for the large cantilever girder steel;The Self-resetting FRP- steel pipe mould assembly Steel column includes coaxial mounted FRP outer tube, steel inner tube and " H " shape steel on the inside of the steel inner tube, the steel Presstressed reinforcing steel along steel inner tube length direction arrangement, the FRP outer tube and steel inner tube are installed between inner tube and " H " shape steel Between and steel inner tube and " H " shape steel between poured be integrated by concrete grouting material respectively.
Further technical solution: it is respectively welded on the endpiece and interlude convenient for endpiece and interlude are carried out spiral shell The end plate connect is tethered, is respectively welded on the interlude and overhanging section bolted convenient for carrying out interlude with overhanging section End plate offers the through-hole passed through convenient for prestressed cable on the end plate.
Further technical solution: the endpiece of the girder steel ontology and the lower flange upper surface for overhanging section are separately installed with Convenient for the bolt type cable wire roller slided when prestressed cable installation.
Further technical solution: the web two sides of the girder steel ontology are respectively provided with enhancing girder steel ontology bending resistance and hold Carry power and along the first ribbed stiffener of girder steel ontology span direction arrangement and along the perpendicular to girder steel ontology span direction arrangement Two ribbed stiffeners.
Further technical solution: the anchorage includes anchor slab and the cone cylinder clamp that is made of three valve intermediate plates, described Anchor slab and girder steel ontology both ends are respectively equipped with buffer plate, offered respectively on the buffer plate, anchor slab it is corresponding with For the through-hole that the prestressed cable passes through, the fixture cooperates when prestressed cable is tensed with the through-hole wedging on anchor slab.
Further technical solution: the prestressed cable end, which is fixed with, prevents prestressed cable relaxation and and prestressing force The rod iron of rope thread cooperation.
Further technical solution: the buckling restrained brace includes coaxially arranged rectangular steel pipe sleeve and is located at institute The cross steel stem on the inside of rectangular steel pipe sleeve is stated, by mixed between the rectangular steel pipe sleeve and cross steel stem Solidifying soil grouting material, which pours, to be integrated.
Further technical solution: the Self-resetting FRP- steel pipe combination fashioned iron column end is equipped with connection board, the FRP The bolt hole for installing the connection board is reserved in castable between outer tube and steel inner tube, wherein first buckling Constraint, which supports, and second buckling restrained brace is V-shaped is mounted in the connection board to support the endpiece in respectively Between section, the steel pipe combination steel column side Self-resetting FRP- be equipped with connecting lateral plate, wherein third root buckling restrained brace install To support the endpiece on the connecting lateral plate.
The beneficial effect of above-mentioned technical proposal is mainly reflected in the following aspects:
(1) i-shape steel beam ontology is divided into three sections endpiece, interlude, overhanging of section by the present invention and be connected by screw bolts can be with The drawbacks of welded connecting is brought is efficiently reduced, overhead welding workload is greatly reduced, installation difficulty is small, and the construction period is short, knot Structure is highly-safe, effectively controls the stress and consolidating settlement of steel construction, conventional weld bring residual stress is avoided to cause structure Brittleness variation, guarantee reasonable stress and the safety of structure, at the same time using prestressed cable it is reasonable to girder steel ontology Application prestressing force can adjust girder steel body construction deformation and stress distribution, improve girder steel ontology bearing capacity, effectively reduce and use steel Amount realizes that long span structure is crossed over.The present invention is suitable for the biggish stadium steel structure of overhanging span and similar engineering.
(2) cord clip tool can limit the installation site of prestressed cable, guarantee prestressed cable along girder steel ontology across It spends direction and extends the accuracy for realizing Path of Force Transfer, substantially increase the stability of assembled large overhanging steel structure;It is described simultaneously Cord clip tool allows prestressed cable by the endpiece of girder steel ontology, interlude, overhanging section effectively connected, prevent endpiece, Interlude overhangs after section is bolted due to causing girder steel ontology use process to be caused danger after bolt fatigue fracture or unstability; Cord clip tool also can avoid rubbing between prestressed cable and girder steel ontology and caused by abrasion;In addition, the cord clip tool also has It is easy to disassemble, installation and structural strength it is high the features such as.
(3) what the present invention innovated uses rectangle steel inner tube and rectangle FRP outer tube (fibre-reinforced plastics) combination Self-resetting FRP- steel pipe combination steel column, when Self-resetting FRP- steel pipe combination steel column by upper pressure act on when concrete Lateral expansion deformation can occur, tensile stress is generated to be deformed to rectangle steel inner tube, and with good tensile property The deformation of steel inner tube can be constrained in rectangle FRP outer tube, so as to play the role of double constraints to steel reinforced concrete core, greatly The big anti-side rigidity for increasing Self-resetting FRP- steel pipe combination steel column, while the initial drawing after the fixation of use for tendon anchorage is answered Residual deformation after power can shake structure is preferably minimized.I.e. vertical Self-resetting FRP- steel pipe combination steel column can be well Play the tensile property of presstressed reinforcing steel and the compressive property and FRP outer tube (fibre-reinforced plastics) and steel of steel reinforced concrete The combination effect of contraction of inner tube processed.
The diagonally-installed buckling restrained brace of the present invention can the girder steel ontology to top play the bradyseism of spring-like and make With when oblique buckling restrained brace is acted on by the pressure of superstructure, cross steel stem and high-strength grout are simultaneously Stress, surrender occurs for cross steel stem to generate lateral buckling deformation, rectangle steel after grouting material reaches compressive strength There is pipe sleeve cylinder stronger rigidity the bending deformation of cross steel stem can be constrained, and play invigoration effect to skewed horizontal load, Vertical deformation after finally structure is shaken is preferably minimized.I.e. diagonally-installed buckling restrained brace can play deformation performance it is strong, The good performance of Hysteresis Behavior, greatly increases the anti-side rigidity of large overhanging steel structure.
The present invention forms three using prestressed cable-buckling restrained brace-Self-resetting FRP- steel pipe combination steel column Anti-vibration defense lines can effectively increase the anti-seismic performance and anti-side rigidity of large overhanging steel structure, and having can be with after geological process Restore original-shape or reduce the characteristic of residual deformation, earthquake can be buffered for large cantilever significantly by setting up multiple seismic-proof The destruction of steel construction guarantees that small shake is not repaired.
(4) the bolt type cable wire roller is for sliding prestressed cable, so that prestressed cable passes through more laborsavingly Cord clip tool on channel and be arranged along girder steel ontology span direction, can greatly reduce in this way lifting prestressed cable when Between, at the same also can be reduced prestressed cable during installation between girder steel ontology because friction and caused by abrasion.
(5) first ribbed stiffener, the second ribbed stiffener can increase the anti-bending bearing capacity of girder steel ontology, guarantee the assembled The resistance to capsizing of large cantilever steel large overhanging steel structure.
(6) buffer plate advantageously reduces the prestressed loss of prestressed cable stretching end, while in prestress steel Bitter end head connects a screwed rod iron, which forms the measure of second prevention and treatment prestressed cable relaxation, i.e., by new Type anchorage further increases the stability and safety in utilization of assembled large overhanging steel structure.
Detailed description of the invention
Fig. 1 is the installation structure diagram of the invention.
Fig. 2 is endpiece, interlude, overhanging section are bolted place's structural schematic diagram.
Fig. 3 is that prestressed cable stretching end anchors schematic diagram.
Fig. 4 is cord clip lamps structure schematic diagram.
Fig. 5 cable wire roller frame schematic diagram.
Fig. 6,7 are Self-resetting FRP- steel pipe combination steel column structural schematic diagram.
Fig. 8 is connection board structural schematic diagram.
Fig. 9,10 are buckling restrained brace structural schematic diagram.
The meaning of label symbol is as follows in figure:
10- girder steel ontology;11- endpiece;12- interlude;13- overhangs section;14- end plate;141- through-hole;15- first puts more energy into Rib;The second ribbed stiffener of 16-;20- prestressed cable;30- anchorage;31- anchor slab;32- intermediate plate;33- buffer plate;34- rod iron; 40- cord clip tool;41- mounting plate;42- clamping plate;421- twisted plate section;The channel 422-;43- support plate;50- cable wire roller;51- rolling Wheel;52- end plate;53- fixes bottom plate;60- buckling restrained brace;61- steel pipe sleeve;The cross steel stem of 62-;63- installation Plate;64- connecting hole;70- Self-resetting FRP- steel pipe combination steel column;71-FRP outer tube;72- steel inner tube;73- " H " shape steel; 74- presstressed reinforcing steel;75- connection board;76- bolt hole;77- connecting lateral plate;A- concrete grouting material.
Specific embodiment
Now in conjunction with Detailed description of the invention design feature of the invention:
The present invention includes i-shape steel beam ontology 10 and prestressed cable 20 as shown in Figure 1:, and the girder steel ontology 10 wraps Include the endpiece 11 being sequentially arranged along girder steel ontology span direction, interlude 12 and overhanging section 13, the endpiece 11 and interlude 12 and interlude 12 with overhanging section 13 be bolted to connection respectively, the web two sides of the girder steel ontology 10 are equipped with edge The prestressed cable 20 that girder steel ontology span direction is disposed to extend, the prestressed cable 20 pass through 10 both ends of girder steel ontology Anchorage 30 anchored with realize to girder steel ontology 10 apply prestressing force.
It is as shown in Figure 4: to be fixed on the web of the girder steel ontology 10 multiple along girder steel ontology span direction arranged for interval And the cord clip tool 40 for installing the prestressed cable, cord clip tool 40 include the first installation unit being arranged symmetrically and Second installation unit, first installation unit, the second installation unit respectively include mounting plate 41 and with the mounting plate 41 Integrally formed clamping plate 42, the clamping plate 42 include arc-shaped twisted plate section 421, first installation unit, the second installation The mounting plate 41 of unit is parallel with the web respectively to be fixed, the clamping plate 42 of first installation unit and the second installation unit Clamping plate 42 the twisted plate section 421 of first installation unit and the formation of the twisted plate section 421 of the second installation unit after being fixed to each other For the channel 422 that the prestressed cable 20 passes through, also it is welded between the mounting plate 41 and clamping plate 42 for reinforcing installation The support plate 43 of plate and clamping plate bonding strength.
It is as shown in Figure 2: to be respectively welded on the endpiece 11 and interlude 12 convenient for carrying out endpiece 11 and interlude 12 Be respectively welded in bolted end plate 14, the interlude 12 and overhanging section 13 convenient for by interlude 12 and overhanging section 13 into Row bolted end plate 14 offers the through-hole 141 passed through convenient for prestressed cable 20 on the end plate 14.
As shown in Figure 5: the endpiece 11 of the girder steel ontology and the lower flange upper surface for overhanging section 13 are separately installed with just In the bolt type cable wire roller 50 that prestressed cable 20 slides.The cable wire roller 50 is by a cylindrical idler wheel 51 and two sides End plate 52 and the fixation bottom plate 53 of lower part form, prepared screw-bolt hole is to be installed on the upper of 10 lower flange of girder steel ontology on bottom plate Surface.
The web two sides of the girder steel ontology 10 are respectively provided with enhancing 10 anti-bending bearing capacity of girder steel ontology and along girder steels The second ribbed stiffener 16 that first ribbed stiffener 15 of ontology span direction arrangement and edge are arranged perpendicular to girder steel ontology span direction.
It is as shown in Figure 3: the cone cylinder clamp 32 that the anchorage 30 includes anchor slab 31 and is made of three valve intermediate plates, the anchor Plate 31 and 10 both ends of girder steel ontology are respectively equipped with buffer plate 33, are offered on the buffer plate 33 for the prestressing force The through-hole that cable wire 20 passes through, the fixture 32 cooperate when prestressed cable 20 is tensed with the through-hole wedging on anchor slab 31.According to Taper wedging principle reaches design prestress value using jack tension prestressed cable, and jack comes up, by uniform The prestressed cable for shrinking movement, which brings fixture 32 into, forms anchoring unit in the through-hole of anchor slab.The stress of prestressed cable passes through Anchor slab and fixture 32, buffer plate 33 are transmitted to girder steel ontology and form permanent prestressing force.
20 end of prestressed cable, which is fixed with, to prevent the relaxation of prestressed cable 20 and matches with 20 screw thread of prestressed cable The rod iron 34 of conjunction.
The invention also includes the Self-resetting FRP- steel pipe combination steel column 70 vertically installed and be tiltedly mounted on it is described from Reset three buckling restrained braces 60 on FRP- steel pipe combination steel column 70.
As shown in Fig. 6,7,8: the Self-resetting FRP- steel pipe combination steel column 70 is by the buckling restrained brace 60 The large cantilever girder steel provides support;The Self-resetting FRP- steel pipe combination steel column 70 include coaxial mounted FRP outer tube 71, Steel inner tube 72 and " H " the shape steel 73 on the inside of the steel inner tube 72, between the steel inner tube 72 and " H " shape steel 73 Be equipped with along 72 length direction of steel inner tube arrangement presstressed reinforcing steel 74, between the FRP outer tube 71 and steel inner tube 72 and It is poured and is integrated by concrete grouting material A respectively between steel inner tube 72 and " H " shape steel 73.
70 end of Self-resetting FRP- steel pipe combination steel column is equipped with connection board 76, the FRP outer tube 71 and steel The bolt hole 77 for installing the connection board 76 is reserved in castable between inner tube 72, wherein first buckling-restrained Support with second buckling restrained brace is V-shaped is mounted in the connection board 76 to support the endpiece 11 in respectively Between section 12,70 side of Self-resetting FRP- steel pipe combination steel column is equipped with connecting lateral plate 78, the wherein buckling-restrained branch of third root Support is mounted on the connecting lateral plate 78 to support the endpiece 11.
The high-performance that the FRP outer tube 71 is formed after being mixed according to a certain percentage by fibrous material with basis material (resin) Profile material has light and hard, non-conductive, high mechanical strength, recycles few, corrosion resistant feature.
As shown in Figures 9 and 10: the buckling restrained brace 60 includes coaxially arranged rectangular steel pipe sleeve 61 and is located at institute State the cross steel stem 62 of the inside of rectangular steel pipe sleeve 61, the rectangular steel pipe sleeve 61 and cross steel stem 62 it Between poured and be integrated by concrete grouting material A.60 end of buckling restrained brace is also correspondingly provided with and the connection board 76 or connecting lateral plate 78 carry out bolted mounting plate 63.
Installation method of the present invention is as follows:
The production for carrying out prestressed cable first, will not only meet the material requirements accordingly standardized, it is necessary to take series Technical measures meet the installation and tensioning requirement of prestressed cable, guarantee structure Tension Forming.Prestressing force of the present invention The finished product rope that cable wire is formed using 1670 grades of high-intensitive zinc/aluminum-plated steel tow, it is ensured that the stress performance of prestressed cable, Prestressing force is reduced in the loss of stretching process;20 surface of prestressed cable has carried out the spraying of ring paint and plating zinc-aluminium processing, outside Packet bilayer PE protection is to realize anticorrosion.
Before the assembling of finished product prestressed cable 20, pre- tensioning should be carried out to prestressed cable 20, to eliminate non-resilient change Shape.After the assembling of prestressed cable 20, ultra stretching experiment is carried out to it.
When steel cage canopy main structure installs, i.e., when segmentation i-shape steel beam ontology 10, buckling restrained brace 60, runback After the main steel structure member rigging outs such as position FRP- steel pipe combination steel column 70, prestressed cable 20 transport at disk It is defeated to arrive construction site.
20 lower end of prestressed cable is sling with crane and is put by the lifting and installation that prestressed cable 20 is carried out with crane It sets on roller 50, prestressed cable 20 is passed through by cord clip tool 40 by traction, designated position is fixed on, prevents in installation process Frictionally damage occurs for middle prestressed cable 20.Prestressed cable 20 will check the quality and cushion of end node before installing Plate and the welding situation of girder steel etc..
By cord clip tool 40 be fixed on the web surface of i-shape steel beam to prestressed cable 20 be fixed in order to Prestressed tensioning.Tensioning is carried out in 20 one end of prestressed cable with hydraulic devices such as jack, guarantees that prestressed cable 20 exists The stability connecting in stretching process with anchorage records compared with the elongation of prestressed cable 20 after tensioning.
Prestressed cable 20 is pulled after finishing, cuts off extra cable wire, unload jack, while in prestressed cable end A threaded rod iron is connected, the rod iron and 20 end thread of prestressed cable, which cooperate, prevents prestress steel to form second The measure of the relaxation of rope 20.

Claims (10)

1. a kind of assembled large overhanging steel structure, it is characterised in that: including large cantilever girder steel, the large cantilever girder steel includes I-shaped Section steel beam ontology (10) and prestressed cable (20), the girder steel ontology (10) include along girder steel ontology span direction successively cloth Endpiece (11), interlude (12) and overhanging section (13), the endpiece (11) and interlude (12) and the interlude (12) set With overhanging section (13) be bolted to connection respectively, the web two sides of the girder steel ontology (10) be equipped with along girder steel ontology across The prestressed cable (20) that degree direction is disposed to extend, the prestressed cable (20) pass through the anchor at girder steel ontology (10) both ends Tool (30) is anchored to realize and apply prestressing force to girder steel ontology (10).
2. assembled large overhanging steel structure as described in claim 1, it is characterised in that: on the web of the girder steel ontology (10) Multiple cord clip tools (40) along girder steel ontology span direction arranged for interval and for installing the prestressed cable are fixed with, it is described Cord clip tool (40) includes the first installation unit and the second installation unit being arranged symmetrically, first installation unit, the second peace Dress unit respectively include mounting plate (41) and with the mounting plate (41) integrally formed clamping plate (42), the clamping plate (42) packet Include arc-shaped twisted plate section (421), first installation unit, the second installation unit mounting plate (41) respectively with the abdomen Plate is fixed in parallel, and the clamping plate (42) of first installation unit and the clamping plate (42) of the second installation unit are described the after being fixed to each other The twisted plate section (421) of one installation unit and the twisted plate section (421) of the second installation unit form and supply the prestressed cable (20) channel (422) passed through is also welded between the mounting plate (41) and clamping plate (42) for reinforcing mounting plate and clamping plate The support plate (43) of bonding strength.
3. assembled large overhanging steel structure as described in claim 1, it is characterised in that: the structure further includes oneself vertically installed It resets FRP- steel pipe combination steel column (70) and is tiltedly mounted on the Self-resetting FRP- steel pipe combination steel column (70) Three buckling restrained braces (60), the Self-resetting FRP- steel pipe combination steel column (70) pass through the buckling restrained brace (60) Support is provided for the large cantilever girder steel;The Self-resetting FRP- steel pipe combination steel column (70) includes outside coaxial mounted FRP Manage (71), steel inner tube (72) and " H " the shape steel (73) being located on the inside of the steel inner tube (72), the steel inner tube (72) Presstressed reinforcing steel (74) along steel inner tube (72) length direction arrangement, the FRP outer tube are installed between " H " shape steel (73) (71) pass through concrete grouting material between steel inner tube (72) and between steel inner tube (72) and " H " shape steel (73) respectively (A) it pours and is integrated.
4. assembled large overhanging steel structure as described in claim 1, it is characterised in that: the endpiece (11) and interlude (12) On be respectively welded convenient for endpiece (11) and interlude (12) are carried out bolted end plate (14), the interlude (12) with It is respectively welded in overhanging section (13) convenient for interlude (12) and overhanging section (13) are carried out bolted end plate (14), it is described The through-hole (141) passed through convenient for prestressed cable (20) is offered on end plate (14).
5. assembled large overhanging steel structure as described in claim 1, it is characterised in that: the endpiece (11) of the girder steel ontology with And the lower flange upper surface of overhanging section (13) is separately installed with the bolt type cable wire convenient for sliding when prestressed cable (20) installation Roller (50).
6. assembled large overhanging steel structure as described in claim 1, it is characterised in that: the web two of the girder steel ontology (10) Side is respectively provided with enhancing girder steel ontology (10) anti-bending bearing capacity and along the first ribbed stiffener of girder steel ontology span direction arrangement (15) and along the second ribbed stiffener (16) perpendicular to girder steel ontology span direction arrangement.
7. assembled large overhanging steel structure as described in claim 1, it is characterised in that: the anchorage (30) includes anchor slab (31) And the cone cylinder clamp (32) being made of three valve intermediate plates, the anchor slab (31) are respectively equipped with girder steel ontology (10) both ends Buffer plate (33) offers on the buffer plate (33), anchor slab (31) corresponding for the prestressed cable respectively (20) through-hole passed through, the fixture (32) cooperate when prestressed cable (20) are tensed with the through-hole wedging on anchor slab (31).
8. assembled large overhanging steel structure as described in claim 1, it is characterised in that: prestressed cable (20) end is solid Surely there is the rod iron (34) for preventing prestressed cable (20) relaxation and being threadedly engaged with prestressed cable (20).
9. assembled large overhanging steel structure as claimed in claim 3, it is characterised in that: the buckling restrained brace (60) includes Coaxially arranged rectangular steel pipe sleeve (61) and the cross steel stem being located on the inside of the rectangular steel pipe sleeve (61) (62), being poured between the rectangular steel pipe sleeve (61) and cross steel stem (62) by concrete grouting material (A) is one Body.
10. assembled large overhanging steel structure as claimed in claim 3, it is characterised in that: the Self-resetting FRP- steel pipe combination Steel column (70) end is equipped with connection board (75), pre- in the castable between the FRP outer tube (71) and steel inner tube (72) There are the bolts hole (76) for installing the connection board (75), wherein first buckling restrained brace and second buckling are about Bundle branch support is V-shaped to be mounted on the connection board (75) to support the endpiece (11) and interlude (12) respectively, described Self-resetting FRP- steel pipe combination steel column (70) side is equipped with connecting lateral plate (77), and wherein third root buckling restrained brace is mounted on To support the endpiece (11) on the connecting lateral plate (77).
CN201910046655.5A 2019-01-18 2019-01-18 A kind of assembled large overhanging steel structure Pending CN109750791A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112982668A (en) * 2021-02-09 2021-06-18 清华大学建筑设计研究院有限公司 Horizontal curve prestressing force device of hollow structure of encorbelmenting greatly
CN113107131A (en) * 2021-04-19 2021-07-13 浙大城市学院 Inner ring intersected external cantilever large-span arc-shaped variable-cross-section box type steel beam structure and forming method
CN113356647A (en) * 2021-06-13 2021-09-07 中国建筑第八工程局有限公司 Double-limb overhanging type steel column system
CN112982668B (en) * 2021-02-09 2022-09-16 清华大学建筑设计研究院有限公司 Horizontal curve prestressing force device of hollow structure of encorbelmenting greatly

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112982668A (en) * 2021-02-09 2021-06-18 清华大学建筑设计研究院有限公司 Horizontal curve prestressing force device of hollow structure of encorbelmenting greatly
CN112982668B (en) * 2021-02-09 2022-09-16 清华大学建筑设计研究院有限公司 Horizontal curve prestressing force device of hollow structure of encorbelmenting greatly
CN113107131A (en) * 2021-04-19 2021-07-13 浙大城市学院 Inner ring intersected external cantilever large-span arc-shaped variable-cross-section box type steel beam structure and forming method
CN113356647A (en) * 2021-06-13 2021-09-07 中国建筑第八工程局有限公司 Double-limb overhanging type steel column system

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