CN110241971B - A prestressed composite steel structure component and construction method thereof - Google Patents
A prestressed composite steel structure component and construction method thereof Download PDFInfo
- Publication number
- CN110241971B CN110241971B CN201910655373.5A CN201910655373A CN110241971B CN 110241971 B CN110241971 B CN 110241971B CN 201910655373 A CN201910655373 A CN 201910655373A CN 110241971 B CN110241971 B CN 110241971B
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- steel
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- steel structure
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- strand
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 143
- 239000010959 steel Substances 0.000 title claims abstract description 143
- 238000010276 construction Methods 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 title claims description 4
- 238000000034 method Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 3
- 238000003359 percent control normalization Methods 0.000 claims 1
- 230000009471 action Effects 0.000 description 6
- 239000011513 prestressed concrete Substances 0.000 description 4
- 239000004567 concrete Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011372 high-strength concrete Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/10—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal prestressed
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Rod-Shaped Construction Members (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a prestress combined steel structure member and a construction method thereof, wherein a combined member of a prestress steel strand (3) and a steel beam is adopted, the cross section of the steel beam is formed by overlapping an upper box section and a lower box section, the prestress steel strand (3) is arranged in an upper box beam (1) of the steel beam section, the deformability of the novel prestress combined steel structure member is improved by tensioning the prestress steel strand (3), and the tension force of the steel strand is controlled, so that the self weight of the steel beam and the prestress steel strand and the deformation generated by constant load can be balanced. Compared with the prior art, the invention combines the prestress steel strand with the steel structure combined member for application, stretches the prestress steel strand between the box girders, avoids the prestress steel strand from being exposed outside the steel structure member, has light self weight and light appearance, solves the problem of rigidity of the large-span steel structure, and greatly improves the deformation resistance of the prestress steel structure combined member.
Description
Technical Field
The invention relates to the technical field of engineering structures, in particular to a prestress combined steel structure member and a construction method thereof.
Background
Conventionally, a prestressed concrete structure is to artificially apply pressure to a structural member before the structural member is subjected to an external force load, so that the generated prestress state is used for reducing or counteracting the tensile stress caused by the external load, that is, the defect of the tensile strength of the prestressed concrete structure is overcome by means of the higher compressive strength of the concrete, and the aim of delaying the cracking of the concrete in a tensile area is fulfilled. Compared with reinforced concrete, the prestressed concrete has the advantages that the prestressed concrete member has the characteristics of strong crack resistance, high rigidity and high strength due to the adoption of high-strength steel and high-strength concrete.
The prestress steel structure is characterized in that before load is applied to the structure, the steel structure or a member is pre-stressed by a specific method, the stress sign of the prestress steel structure or the member is opposite to that caused by the load, and when the load is applied, the safety and normal use of the structure are ensured. The structure or member counteracts the initial stress first, but also considers the effect of the pre-stress, and then the steel structure working according to the general stress condition is called a pre-stress steel structure. The cable is mainly applied to large-span structures such as stadiums, exhibition centers, theaters, and large public buildings, and is widely applied to beam string structures and cable structures.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a prestress combined steel structure member and a construction method thereof.
The aim of the invention can be achieved by the following technical scheme:
a prestress combined steel structure member comprises a steel beam and prestress steel strands arranged in the steel beam.
Further, the steel beam is a double-layer box beam formed by vertically overlapping an upper box beam and a lower box beam, and a prestress steel strand arranged in the section of the upper box beam.
Further, the height ratio of the lower box girder to the upper box girder is 3:1.
Further, the tensile strength of the prestress steel strand is f py＝1570N/mm2.
Further, the specification of the prestress steel strand is 3-7 phi s 15.24.24.
Further, the tensile force of the prestress steel strand balances the deformation generated by the dead weight and constant load of the steel beam and the prestress steel strand.
A design method of a prestress steel structure combined member. The method comprises the following steps:
1) Determining the beam section and the prestress steel strand design of the prestress steel structure combined member;
2) And checking the strength, rigidity, stability and construction process of the prestress steel structure combined member according to the specifications.
A construction method of a prestress combined steel structure member comprises the following specific steps:
(a) Processing a steel structure combined member in a factory, and carrying out prestress primary tensioning after finishing processing and blanking;
(b) Assembling the prestress steel structure combined members to form a hoisting unit;
(c) The method comprises the steps of (1) transporting a prestress steel structure combined member hoisting unit to a construction site for site installation;
(d) Carrying out secondary tensioning on the prestressed steel strand on the prestressed steel structure combined member;
(e) And after all the structures are installed on site, carrying out supplementary tensioning on the prestressed steel strands on the prestressed steel structure combined member.
Further, in the step (a), the primary stretching is to stretch the steel strand to a tension force capable of counteracting the dead weight load working condition of the steel beam and the prestressed steel strand thereon.
Further, in the step (d), the secondary tension is performed to balance the dead weight of the steel beam and the prestressed steel strand and the control stress (namely, 0.80 sigma con) of the deformation 80% caused by the constant load.
Further, in the step (e), the control stress (1.00 sigma con) is supplemented and tensioned to balance the dead weight of the steel beam and the prestressed steel strand and the deformation 100% caused by constant load.
Further, between the primary tensioning and the secondary tensioning, pre-tensioning can be performed, and the steel strand is tensioned so that the control stress (namely, 0.4σ con) of the self weight of the steel beam, the pre-stressed steel strand and the deformation 40% caused by constant load can be balanced.
The stretching process comprises the steps of 0-0.4sigma con -measuring the deformation condition and elevation of the box girder, 0.80sigma con→1.00σcon -measuring the deformation condition and elevation of the box girder for the second time.
The prestress steel strand is stretched step by step, so that the self weights of the steel beams and the steel strands and the deformation generated by constant load can be balanced in stages, the deflection of the steel structure is effectively controlled, and the self weights of the steel beams and the steel strands and the deformation generated by constant load can be balanced in consideration of the arrangement of the prestress of the inhaul cable.
The prestress steel strand and the steel structure combined member are combined for application, the prestress steel strand is stretched between the box girders, the prestress steel strand is prevented from being exposed out of the steel structure member, the self weight of the structure is light, the appearance is light, the problem of rigidity of a large-span steel structure is solved, and the deformation resistance of the prestress steel structure combined member is greatly improved.
Compared with the prior art, the invention has the following beneficial effects:
1. is suitable for a large-span steel structure system, and has light self weight and light appearance.
2. The prestress steel strand is combined with the steel structure combined member, so that the steel structure combined member has better in-plane structural rigidity.
3. The novel prestress combined steel structure component system is characterized in that the deformability of the novel prestress combined steel structure component can be improved by stretching steel strands.
4. The tension of the steel strand is controlled, so that the steel strand can balance the dead weight of the steel beam and the steel strand and the deformation caused by constant load.
5. The method is convenient to install on site, and simultaneously, the method for distributing and stretching the steel strands is convenient to control the deformation of the structural member.
Drawings
FIG. 1 is a cross-sectional view of a novel pre-stressed composite member;
FIG. 2 is a cross-sectional view of the novel prestressed composite member;
FIG. 3 is a cross-sectional layout of an embodiment of the present invention;
FIG. 4 is a deformation diagram of the embodiment of the present invention under the action of its own weight;
FIG. 5 is a deformation graph of an embodiment of the present invention under simultaneous action of constant load and live load;
figure 6 is a graph showing deformation of an embodiment of the present invention under simultaneous action of constant load, live load and prestressing.
The reference numerals in the figures indicate:
1. an upper box girder, a lower box girder, 3 and a prestress steel strand.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Example 1
A prestress combined steel structure member comprises a steel beam and prestress steel strands arranged in the steel beam. The steel beam is a double-layer box beam formed by vertically overlapping an upper box beam 1 and a lower box beam 2, and a prestress steel strand 3 arranged in the section of the upper box beam 2.
A large cantilever steel structure is adopted for a certain roof, the maximum net cantilever position is about 12m, and the distance between steel structure beams is about 9m. Considering the large overhanging of the roof beam and the requirement of the building on the section height, a double-layer box section beam is adopted, and a steel structure prestress steel strand 3 is arranged in the upper box beam 1, wherein the prestress steel strand is 3-7 phi s 15.24.24, the area is 2919mm 2, and the tensile strength f py＝1570N/mm2.
The concrete construction method comprises the following steps:
1) And (3) processing the steel structure combined member in a factory, tensioning the prestress once after finishing processing and blanking, and tensioning the prestress steel strand 3 until the tension under the working condition of taking the dead weight load of the steel beam and the prestress steel strand 3 on the steel beam into consideration can be counteracted.
2) And assembling the prestress steel structure combined members to form a hoisting unit.
3) And (5) transporting the prestressed steel structure combined member hoisting unit to a construction site for field installation.
4) The prestress steel strand 3 on the prestress steel structure combined member is tensioned for the second time, so that the control stress (namely 0.80 sigma con) of the dead weight of the steel beam and the prestress steel strand 3 and 80% of deformation generated by constant load can be balanced.
5) After all structures are installed on site, the pre-stress steel stranded wires 3 on the pre-stress steel structure combined member are subjected to supplementary tensioning, so that the control stress (namely 1.00 sigma con) of the self weight of the steel beam and the pre-stress steel stranded wires 3 and 100% of deformation generated by constant load can be balanced.
The maximum value of deflection of the prestress steel structure combined member under the action of dead weight is 50mm as shown in fig. 4, the maximum value of deflection of the prestress steel structure combined member under the action of constant load and live load is 213mm as shown in fig. 5, and the maximum value of deflection of the prestress steel structure combined member under the action of constant load, live load and prestress is 82mm as shown in fig. 6, which shows that the invention achieves the design effect by application.
The previous description of the embodiments is provided to facilitate a person of ordinary skill in the art in order to make and use the present invention. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present invention.
Claims (4)
1. The prestress combined steel structure member is characterized by comprising a steel beam and prestress steel strands (3) arranged in the steel beam;
The steel beam is a double-layer box beam formed by vertically overlapping an upper box beam (1) and a lower box beam (2), and a prestress steel strand (3) arranged in the section of the upper box beam (1);
The height ratio of the lower box girder (2) to the upper box girder (1) is 3:1;
the construction method of the prestress combined steel structure member comprises the following specific steps:
(a) Processing a steel structure combined member in a factory, and carrying out pre-stress primary tensioning after finishing processing and blanking, wherein the primary tensioning is to tension the steel strand to a tension force capable of counteracting the dead weight load working condition of the steel beam and the pre-stress steel strand (3) on the steel strand;
(b) Assembling the prestress steel structure combined members to form a hoisting unit;
(c) The method comprises the steps of (1) transporting a prestress steel structure combined member hoisting unit to a construction site for site installation;
(d) Carrying out secondary tensioning on the prestress steel strand (3) on the prestress steel structure combined member, wherein the secondary tensioning can balance the dead weight of the steel beam and the prestress steel strand (3) and control stress of 80% of deformation generated by constant load;
(e) After all structures are installed on site, the pre-stress steel stranded wires (3) on the pre-stress steel structure combined member are subjected to supplementary tensioning, so that the self weight of the steel beam and the pre-stress steel stranded wires (3) and 100% control stress of deformation generated by constant load can be balanced.
2.A prestressed composite steel structural member according to claim 1, characterized in that said prestressed steel strands (3) have a tensile strength of f py＝1570N/mm2.
3. The prestress combined steel structure member of claim 1, wherein the prestress wire (3) has a gauge of 3-7 phi s 15.24.24.
4. The prestress combined steel structure member according to claim 1, wherein the tension force of the prestress wire (3) balances the deformation of the steel girder, the dead weight of the prestress wire (3) and the constant load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655373.5A CN110241971B (en) | 2019-07-19 | 2019-07-19 | A prestressed composite steel structure component and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655373.5A CN110241971B (en) | 2019-07-19 | 2019-07-19 | A prestressed composite steel structure component and construction method thereof |
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| CN110241971A CN110241971A (en) | 2019-09-17 |
| CN110241971B true CN110241971B (en) | 2024-12-06 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401254A (en) * | 2016-09-14 | 2017-02-15 | 东南大学 | Self-reset steel framework structure for restraining energy consumption of core plate through buckling |
| CN108331040A (en) * | 2018-02-11 | 2018-07-27 | 华南理工大学建筑设计研究院 | A kind of overlapping girder steel that can quickly assemble |
| CN211114410U (en) * | 2019-07-19 | 2020-07-28 | 同济大学建筑设计研究院(集团)有限公司 | Prestress combined steel structure member |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3144077B2 (en) * | 1992-08-10 | 2001-03-07 | 株式会社大林組 | How to join columns and beams |
| KR100423757B1 (en) * | 2001-05-04 | 2004-03-22 | 원대연 | Prestressed composite truss girder and construction method of the same |
| JP5104703B2 (en) * | 2008-10-08 | 2012-12-19 | 日本軽金属株式会社 | Beam structure |
| CN103233550B (en) * | 2013-04-19 | 2015-11-04 | 北京市住宅建筑设计研究院有限公司 | Prefabricated PC honeycomb web steel beam |
| CN103266718A (en) * | 2013-06-08 | 2013-08-28 | 中交二航局第四工程有限公司安徽分公司 | Prestress tension steel beam |
| CN203393602U (en) * | 2013-06-08 | 2014-01-15 | 中交二航局第四工程有限公司安徽分公司 | Prestressed stretching steel beam |
| CN104018574A (en) * | 2014-03-20 | 2014-09-03 | 北京工业大学 | Modularization multi-high-rise assembly type steel structure occlusion steel beam prestress eccentric support system |
| KR101741204B1 (en) * | 2016-06-29 | 2017-05-29 | 주식회사 가람에스티 | Multi forming type composite beam |
| CN207073154U (en) * | 2017-08-11 | 2018-03-06 | 甘肃建科技术试验检测有限责任公司 | A kind of large-tonnage dead load test on pile foundation folding counterforce girder steel |
| CN109811771B (en) * | 2019-01-16 | 2020-09-01 | 北京建材地质工程有限公司 | Simple method for preventing anchor rod steel waist beam from bending during tensioning |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401254A (en) * | 2016-09-14 | 2017-02-15 | 东南大学 | Self-reset steel framework structure for restraining energy consumption of core plate through buckling |
| CN108331040A (en) * | 2018-02-11 | 2018-07-27 | 华南理工大学建筑设计研究院 | A kind of overlapping girder steel that can quickly assemble |
| CN211114410U (en) * | 2019-07-19 | 2020-07-28 | 同济大学建筑设计研究院(集团)有限公司 | Prestress combined steel structure member |
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