CN109736200A - A kind of steel-UHPC thin plate combined structure system of steel plate support-cluster skew nailing quick assembling - Google Patents
A kind of steel-UHPC thin plate combined structure system of steel plate support-cluster skew nailing quick assembling Download PDFInfo
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- CN109736200A CN109736200A CN201811496216.6A CN201811496216A CN109736200A CN 109736200 A CN109736200 A CN 109736200A CN 201811496216 A CN201811496216 A CN 201811496216A CN 109736200 A CN109736200 A CN 109736200A
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Abstract
The invention discloses a kind of steel plate support-cluster skew nailing quick assembling steel-UHPC thin plate combined structure systems, including girder steel, UHPC thin plate, steel plate support, short nail, steel plate support is isosceles trapezoidal structure, steel plate support is equipped with connecting hole, high-strength friction-type bolt passes through connecting hole and connect with girder steel, short nail is vertically set on the inclined-plane and rear and front end face of steel plate support two sides, UHPC thin plate is arranged above girder steel, the assembly of steel plate support and short nail is evenly distributed on inside UHPC thin plate, ultra-thin floorings are made using UHPC in the present invention, it can reduce dead load, enhancing structure span ability.It connect to form combined structure system by the cluster formula skew nailing of the plate support containing steel plate in interface with girder steel, reduce interface sliding amount using the rigid connection of steel plate plate support in serviceability limit stage, in limiting condition, using peg flexible connecting member feature, steel plate support is made up as the insufficient defect of rigid connector ductility.And the shear behavior at the interface steel-UHPC can be enhanced in the peg of lateral arrangement.
Description
Technical field
The invention belongs to the composite structure fields in field of civil engineering, and in particular to a kind of steel plate support-cluster skew nailing is fast
Steel-UHPC thin plate the combined structure system that quick-mounting is matched.
Background technique
Traditional steel-concrete combined structure is mainly formed girder steel with normal concrete floorings by shear connectors such as pegs
The common stress in compound section.Relative to steel bridge construction system, composite bridge can reduce structural cost, and relative to coagulation
Dead load can be effectively reduced in native bridge, composite bridge again.Therefore the structural system has given full play to steel construction and coagulation
Advantage of the soil structure in terms of workability and mechanical property, while but also with good economy.But domestic and foreign scholars' grinds
Study carefully and show: common steel reinforced concrete combined bridge structure limits the span ability of structure since its concrete slab is from great.And
The construction cost that the larger self weight of superstructure will lead to substructure is higher, further constrains the applicability of composite structure.
Simultaneously normal concrete floorings due to characteristics the make floorings such as normal concrete tensile strength is low there are it is easy to crack the problems such as,
Influence the durability etc. of structure.
To solve the problems such as normal concrete floorings easily crack, the widest technology hand applied in engineering at present
Section is to apply certain compression deposit using prestressing technique, although these measures to a certain extent can be to problem of Cracking
Etc. limiting, but which increase construction cost and difficulties, and the shrinkage and creep of concrete itself is also easy to cause part to answer in advance
Power loss.
It is self-possessed the problems such as larger for the floorings of common steel reinforced concrete composite bridge, at present mainly using hollow in engineering
Section or application certain level prestressing force etc. mitigate dead load.Although these measures can reduce structure certainly to a certain extent
Weight, but make work progress complicated simultaneously, it is not easy to implement.
Summary of the invention
To solve the above problems, the invention discloses a kind of steel plate support-cluster skew nailing quick assembling steel-UHPC thin plate groups
Close structural system.Mainly utilizing UHPC(ultra-high performance concrete) higher compression strength reduces compressive region plate thickness, to reach
To the purpose for mitigating dead load.It is furnished with assorted fibre in UHPC simultaneously, is capable of the tensile strength of larger raising UHPC, reaches
The effect for preventing UHPC floorings from cracking.In the connection of interface, combine to form group by using the short nail of major diameter and steel plate support
Box-like Shear connection technology, so that steel plate support and Welded-Stud Conectors play main work in serviceability limit stage and limiting condition respectively
With formation rigid-soft controllable composite structure new system of different phase.Both the ultimate bearing capacity of composite structure had been improved, while more
The insufficient defect of rigid connector ductility is mended.
In order to achieve the above objectives, technical scheme is as follows:
A kind of steel-UHPC thin plate combined structure system of steel plate support-cluster skew nailing quick assembling, including girder steel, UHPC thin plate, steel
Plate support, short nail, the steel plate support are isosceles trapezoidal structure, and steel plate support is equipped with connecting hole, and high-strength friction-type bolt passes through connection
Hole is connect with girder steel, and the short nail is vertically set on the inclined-plane and rear and front end face of steel plate support two sides, the UHPC thin plate
It is arranged above girder steel, the assembly of steel plate support and short nail is evenly distributed on inside UHPC thin plate.
Further, the short nail uses diameter for the major diameter peg of 30mm, peg height and UHPC plate thickness phase
It adapts to.
Further, the short nail on the inclined-plane of steel plate support two sides is identical as the short nail dimension on the face of rear and front end, shape.
Further, the steel plate support the length of the hypotenuse is determined according to peg diameter and bevel edge inclination angle, and steel plate longitudinally welds
It stitches length to be determined according to the length of the hypotenuse and inclination angle, the bevel edge best angle control of steel plate support is between 30 to 60 degree.
Further, the UHPC thin plate needs to be made of the UHPC of incorporation assorted fibre, mainly uses body
Product volume is respectively 1% straight steel fibre and 1% end hooked fibre.
Further, the UHPC thin plate of the 50-80mm thickness is high according to steel plate plate support thickness, peg inclination angle and peg
Degree determines.
It is had the advantage that the utility model has the advantages that the present invention compares prior art
1. the invention uses diameter to connect for the short nail of 30mm in interface, it is welded in steel plate support bevel edge and front/rear end
On, oblique peg and plate support interface shearing strength are increased, the globality that peg is connected with steel plate support is improved.
2. invention integrated use steel plate support and the short nail of major diameter are used as shear connector respective advantage.Normally make
With the stage, feature of the steel plate as rigid interface connector is relied primarily on, its interface sliding is reduced, in the load action later period, by
In the flexible shear feature of peg and high-strength bolt, moderate finite deformation is generated, structural limits state Ductility Requirement is met.
3. the tensile strength with higher because mixing assorted fibre of UHPC thin plate used by, can be improved hogging moment area
Crack resistance, and its higher density and the fractue spacing feature of " narrow and close " are conducive to improve the durability of structure.
4. the new composite structure system can inclination angle by adjusting the inclination angle of steel plate support to control oblique peg, thus
The anti-side rigidity for changing peg, makes it meet the needs of limiting condition slip property.
5. the structural system improves the shear stiffness at interface, the height of rigidity characteristics and UHPC by the rigid connection of plate support
Resistance to compression feature is adapted, and can give full play to the big advantage of its rigidity.And under limiting condition, make peg or bolt prior to steel plate
Support is destroyed, and both ensure that interface joint efficiency, while the stronger feature of deformability that is bolted is utilized, and improves structure
Levels of ductility.
6. lateral (front and back end) peg of the structural system can assist in steel plate support and participate in stress, enhance the lateral of steel plate support
Effect of contraction improves the shear behavior at interface.
7. lateral and oblique peg can form the space truss web member system of UHPC thin plate, Neng Gouzeng in the structural system
Add the anti-side rigidity of UHPC thin plate, to enhance the overall stiffness of compound section.
8. the structural system light plate support-cluster formula skew nailing combined shear part is bolted by high-strength friction-type instead of weldering
It connects, is conveniently replaceable, greatly accelerate live bridge rapid construction process.
Detailed description of the invention
Fig. 1 is steel-UHPC thin plate combined structure system and interface organigram of the present invention；
Fig. 2 is combined structure system longitudinal sectional drawing in the present invention；
Fig. 3 is combined structure system transverse cross-sectional view in the present invention.
Reference signs list:
The high-strength friction-type bolt of 1- girder steel, 2-UHPC thin plate, 3-, 4- combined type shear key, 5- steel plate support, the oblique short nail of 6-, 7-
Short nail, 8- connecting hole, 9- girder steel preformed hole, 10- screw rod, 11- nut, 12- gasket on the face of rear and front end.
Specific embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following specific embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.It should be noted that word " preceding " used in the following description,
" rear ", "left", "right", "up" and "down" refer to that the direction in attached drawing, word "inner" and "outside" refer respectively to direction or remote
Direction from geometric center of specific component.
Embodiment:
The present invention is a kind of novel high-performance steel-UHPC thin plate combined structure system and interface interconnection technique adaptable therewith.
The structural system mainly includes the UHPC thin plate 2 being layered on girder steel 1 and is sheared by the combined type that high-strength friction-type bolt 3 connects
Part 4, wherein combined type shear key 4 is composed of the short nail 7 on the oblique short nail 6 of steel plate support 5 and major diameter and rear and front end face.
The short nail uses the big peg of diameter 30mm.
The steel plate the length of the hypotenuse meets short nail diameter and welding requirements, and steel plate support thickness is according to the length of the hypotenuse and inclination angle
It determines.
The floorings use the UHPC thin plate of assorted fibre configuration, and thickness is used in 50mm or so, assorted fibre
Volume volume is respectively 1% straight steel fibre and 1% end band crotch steel fibre.
Specific implementation process of the present invention is as follows:
Step 1: short tack welding being connected to steel plate support in steel plate support center prepared screw-bolt hole in the good trapezoidal steel plate support of factory process
Bevel edge and side on, formed steel plate support-cluster formula skew nailing combined type connector；
Step 2: drilling on girder steel, combined type shear key 4 is connected on girder steel 1 by high-strength friction-type bolt 3, is placed
Gasket 12 simultaneously tightens nut 11；
Step 3: pouring UHPC thin plate layer, girder steel is made to connect to form entire combination section by shear key with UHPC thin plate.
In this example, the UHPC thin plate of step 3 is made of the UHPC that assorted fibre is prepared is poured, including straight steel
The steel fibre of fiber and end with crotch, thickness are calculated according to practical mechanical property requirements and are determined.
This example specifically use by steel plate support-skew nailing combined type connector carry out intermixing connect to be formed it is novel
Steel and UHPC thin plate combined structure system, fully utilize peg and the respective advantage of steel plate support, form under use state just
The features such as ductility is good under degree is big and limiting condition.
UHPC floorings are used in the novel interfacial composite construction for connecting system, not only alleviate dead load, but also improve
Structure durability.Therefore the structural system has significant technology and economic value.
Lateral major diameter peg in the new composite structure system can provide certain lateral for the shearing resistance of steel plate support
Constraint is conducive to enhance interface shearing-resistance rigidity.
The cluster formula skew nailing being arranged in UHPC thin plate forms truss diagonal web member system, which can be improved UHPC
The anti-side rigidity of thin plate improves the overall stiffness of compound section.
High-strength bolt in the new composite structure system can use different pretightning force and bolt according to actual needs
Diameter, and be connected by screw bolts and rapid construction efficiency may be implemented instead of welding.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.
Claims (6)
1. a kind of steel plate support-cluster skew nailing quick assembling steel-UHPC thin plate combined structure system, it is characterised in that: including steel
Beam, UHPC thin plate, steel plate support, short nail, the steel plate support are isosceles trapezoidal structure, and steel plate support is equipped with connecting hole, high-strength friction
Type bolt passes through connecting hole and connect with girder steel, and the short nail is vertically set on the inclined-plane and rear and front end face of steel plate support two sides
On, the UHPC thin plate is arranged above girder steel, and the assembly of steel plate support and short nail is evenly distributed on inside UHPC thin plate.
2. a kind of steel-UHPC thin plate composite structure body of steel plate support-cluster skew nailing quick assembling according to claim 1
System, it is characterised in that: the UHPC thin plate is made of the UHPC of incorporation assorted fibre, mainly uses volume addition ratio
Respectively 1% straight steel fibre and 1% end hooked fibre.
3. a kind of steel-UHPC thin plate composite structure body of steel plate support-cluster skew nailing quick assembling according to claim 1
System, it is characterised in that: the short nail uses the peg of 30mm diameter.
4. a kind of steel-UHPC thin plate composite structure body of steel plate support-cluster skew nailing quick assembling according to claim 1
System, it is characterised in that: the short nail on steel plate support inclined-plane is centrosymmetrically arranged about inclined-plane, and short on two inclined-planes and front/rear end
Nail is arranged symmetrically about steel plate support center line.
5. a kind of steel-UHPC thin plate composite structure body of steel plate support-cluster skew nailing quick assembling according to claim 1
System, it is characterised in that: the short nail on the inclined-plane of steel plate support two sides is identical as the short nail dimension on the face of rear and front end, shape.
6. a kind of steel-UHPC thin plate combined structure system of steel plate support-cluster skew nailing quick assembling according to claim 1
Production method, it is characterised in that: the following steps are included:
Step 1: in the good trapezoidal steel plate support of factory process, reserving connecting hole at steel plate support center, short tack welding is connected to steel plate support
Bevel edge and front/rear end on, formed steel plate support-cluster formula skew nailing combined type shear key；
Step 2: drilling on girder steel, combined type shear key is bolted by high-strength friction-type on girder steel, placing pad
Piece simultaneously tightens nut；
Step 3: pouring UHPC thin plate layer, girder steel is made to connect to form entire combination section by shear key with UHPC thin plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496216.6A CN109736200B (en) | 2018-12-07 | 2018-12-07 | Steel-UHPC sheet combination structure system for quickly assembling steel plate support-cluster inclined nail |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811496216.6A CN109736200B (en) | 2018-12-07 | 2018-12-07 | Steel-UHPC sheet combination structure system for quickly assembling steel plate support-cluster inclined nail |
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| CN109736200A true CN109736200A (en) | 2019-05-10 |
| CN109736200B CN109736200B (en) | 2020-11-27 |
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| CN201811496216.6A Active CN109736200B (en) | 2018-12-07 | 2018-12-07 | Steel-UHPC sheet combination structure system for quickly assembling steel plate support-cluster inclined nail |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067313A (en) * | 2019-05-22 | 2019-07-30 | 重庆交通大学 | Pressure-bearing-shearing-type connector |
| CN110904807A (en) * | 2019-11-26 | 2020-03-24 | 南通万航船舶设计有限公司 | Pin-connected panel passenger footbridge structure |
| CN110067313B (en) * | 2019-05-22 | 2024-04-26 | 重庆交通大学 | Pressure-bearing shearing type connecting piece |
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| CN105239720A (en) * | 2015-11-18 | 2016-01-13 | 湖南大学 | Prefabricated assembled steel-concrete composite beam connected by adopting high-strength bolt |
| JP2016008394A (en) * | 2014-06-23 | 2016-01-18 | 大成建設株式会社 | Precast floor slab and connecting structure with main girder |
| CN107642031A (en) * | 2017-09-06 | 2018-01-30 | 河海大学 | Friction-type peg shear connector and its construction method |
| CN207176503U (en) * | 2017-07-27 | 2018-04-03 | 长安大学 | Based on the steel fiber reinforced concrete assembled steel bridge panel for bonding setback part |
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2018
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Patent Citations (5)
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| JP2016008394A (en) * | 2014-06-23 | 2016-01-18 | 大成建設株式会社 | Precast floor slab and connecting structure with main girder |
| CN105239720A (en) * | 2015-11-18 | 2016-01-13 | 湖南大学 | Prefabricated assembled steel-concrete composite beam connected by adopting high-strength bolt |
| CN207176503U (en) * | 2017-07-27 | 2018-04-03 | 长安大学 | Based on the steel fiber reinforced concrete assembled steel bridge panel for bonding setback part |
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Non-Patent Citations (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067313A (en) * | 2019-05-22 | 2019-07-30 | 重庆交通大学 | Pressure-bearing-shearing-type connector |
| CN110067313B (en) * | 2019-05-22 | 2024-04-26 | 重庆交通大学 | Pressure-bearing shearing type connecting piece |
| CN110904807A (en) * | 2019-11-26 | 2020-03-24 | 南通万航船舶设计有限公司 | Pin-connected panel passenger footbridge structure |
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| Publication number | Publication date |
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| CN109736200B (en) | 2020-11-27 |
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