CN105926974A - Steel structure composite beam capable of improving bearing capacity of existing steel beam - Google Patents
Steel structure composite beam capable of improving bearing capacity of existing steel beam Download PDFInfo
- Publication number
- CN105926974A CN105926974A CN201610336861.6A CN201610336861A CN105926974A CN 105926974 A CN105926974 A CN 105926974A CN 201610336861 A CN201610336861 A CN 201610336861A CN 105926974 A CN105926974 A CN 105926974A
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- China
- Prior art keywords
- steel
- girder steel
- existing
- bearing capacity
- existing girder
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- 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
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
Abstract
The invention discloses a steel structure composite beam capable of improving the bearing capacity of an existing steel beam. An auxiliary steel beam is arranged below the existing steel beam in parallel. Anchorage devices and at least one gravitation supporting rack are arranged between the existing steel beam and the auxiliary steel beam. One end of the auxiliary steel beam is fixed, and the other end of the auxiliary steel beam is connected with a force applying device, or a fastening device is arranged on the auxiliary steel beam. The existing steel beam, the auxiliary steel beam and the anchorage devices are connected firmly, and the steel structure composite beam capable of improving the bearing capacity is composed of the existing steel beam, the auxiliary steel beam, the anchorage devices, the fastening device and the gravitation supporting racks jointly. By the adoption of the steel structure composite beam, the existing steel beam in the project present state can be reinforced on site, the method is easy and convenient to implement, the steel structure composite beam is simple in structure, and engineering design and using requirements can be met.
Description
Technical field
The invention belongs to engineering structure technical field, a kind of steel construction combination beam increasing existing girder steel bearing capacity.
Background technology
At engineering fields such as water conservancy, traffic, civil buildings, it is sometimes desirable to existing girder steel is improved under real load its reliability of engineering structure or needs to increase maneuvering load on existing steel structure girder.But, there is no certain, unified reinforcement means increasing steel structure girder bearing capacity and bracing means the most both at home and abroad to meet the actual requirement of this type of engineering site.
Summary of the invention
It is an object of the invention to overcome above-mentioned deficiency to provide a kind of steel construction combination beam increasing existing girder steel bearing capacity.
The present invention is achieved through the following technical solutions above-mentioned purpose: increase the steel construction combination beam of existing girder steel bearing capacity, in existing girder steel parallel beneath, secondary girder steel is set, between existing girder steel and secondary girder steel, anchorage and at least one gravitation bracing frame are set, secondary girder steel one end is fixed, the other end connects force application apparatus or secondary girder steel is provided with clamp device, existing girder steel, secondary girder steel and anchorage firmly connect, and collectively constitute the steel construction combination beam increasing bearing capacity with clamp device, gravitation bracing frame.
Anchorage position is risen at 0～1/3 in existing girder steel end.
Spacing d between secondary girder steel and the existing girder steel existing girder steel height less than 1.5 times.
The height adjustment range of adjustable height gravitation bracing frame is 1～3 times of existing girder steel spacing d with secondary girder steel, is 0.5～3 times of existing girder steel (1) height simultaneously.
Described existing girder steel is shaped steel or steel structure combination beam.
Described shaped steel is I-steel, channel-section steel or H profile steel.
Secondary girder steel is reinforcing bar or steel strand wires or shaped steel or band steel.
Existing girder steel, secondary girder steel and anchorage firmly connect, steel construction combination beam is collectively constituted with clamp device, gravitation bracing frame, bear the whole load transmitted by existing girder steel, individually bear load difference with existing girder steel to be, secondary girder steel assume responsibility for the internal force that fractional load transmits, when making existing girder steel bear load, main mechanical parameter reduces, and reliability adds, and therefore steel construction combination beam has reached the purpose of increase existing girder steel bearing capacity.
The invention discloses the steel construction combination beam increasing existing girder steel bearing capacity in the engineering fields such as a kind of water conservancy, traffic, civil buildings under engineering present situation, just can realize existing girder steel by means of easy method and increase bearing capacity and improve the purpose of structural reliability.This method has passed through the FEM (finite element) model of existing girder steel and steel strand wires (or reinforcing bar or shaped steel or band steel) composition steel construction combination beam, checks through ANSYS computational analysis, structure realistic model simulation test, engineering site load test etc., verifies.Using steel construction combination beam disclosed by the invention, girder steel existing under engineering present situation can be carried out field-hardened, method is simple, and steel construction combined beam structure is simple, it is possible to meets engineering design and uses requirement.
Accompanying drawing explanation
Fig. 1 is structural representation Fig. 1 of the present invention.
Fig. 2 is structural representation Fig. 2 of the present invention.
Fig. 3 is existing girder steel and secondary girder steel spacing is the schematic diagram of zero.
Fig. 4 is existing girder steel with secondary girder steel spacing at the schematic diagram more than zero.
Fig. 5 is the structural representation arranging a power transmission support member between existing girder steel and secondary girder steel.
Fig. 6 is the structural representation arranging two power transmission support members between existing girder steel and secondary girder steel.
Fig. 7 is the structural representation arranging clamp device on secondary girder steel.
Fig. 8 is the structural representation of anchorage of the present invention.
Fig. 9 is the structural representation of clamp device of the present invention.
Detailed description of the invention
As shown in Figure 1 and Figure 2, a kind of steel construction combination beam increasing existing girder steel bearing capacity, in existing girder steel 1 parallel beneath, secondary girder steel 2 is set, distance d between secondary girder steel 2 and existing girder steel 1 existing girder steel 1 height less than 1.5 times, to meet stability requirement, arranging the first anchorage 3 and the second anchorage 5 shown in Fig. 8 between, the first anchorage 3 or the second anchorage 5 are arranged on existing girder steel 1 end and rise at 0～1/3, to reduce span centre stress and to meet amount of deflection requirement；Such as Fig. 3, shown in Fig. 4, according to the size increasing bearing capacity, at least one gravitation bracing frame 6 can be set between existing girder steel 1 and secondary girder steel 2, one gravitation bracing frame is arranged on the centre of secondary girder steel 2, two or three or multiple gravitation bracing frame 6 are uniformly arranged on secondary girder steel 2, can also need to be arranged on specific position on secondary girder steel 2 according to stress, such as two gravitation bracing frames are symmetricly set on secondary girder steel, the spacing of two gravitation bracing frames is 1/3～1/2 secondary girder steel length, described gravitation bracing frame 6 is height adjustable gravitation bracing frame, height adjustment range is 1～3 times of existing girder steel 1 and secondary girder steel 2 spacing d, and meet 0.5～3 times for existing girder steel height simultaneously, between existing girder steel and secondary girder steel, gravitation bracing frame is set, improve secondary girder steel and share the ability of carrying；Secondary girder steel 2 one end is fixed, the other end connects force application apparatus, using fixing end anchorage as support, just set stress with force application apparatus certain deformation reserved to secondary girder steel 2 or applying or in reinforcing process, apply stress, steel construction combination beam is made to reach the ability of the comprehensive load after undertaking increase, or, such as Fig. 5, Fig. 6, shown in Fig. 7, when secondary girder steel 2 undertakes less pulling force, such as pulling force ＜ 100kN, on secondary girder steel 2, clamp device 4 as shown in Figure 9 can also be set, now, clamp device 4 plays the effect of force application apparatus, complete certain deformation reserved to secondary girder steel or apply initial stress or in reinforcing process, apply stress, described force application apparatus is the device of the common applying in this area power.Existing girder steel 1, secondary girder steel 2 and first anchorage the 3, second anchorage 5 firmly connect, and collectively constitute the steel construction combination beam increasing bearing capacity with clamp device 4, gravitation bracing frame 6.
Described existing girder steel 1 can be shaped steel or steel structure combination beam, and shaped steel is I-steel, channel-section steel or H profile steel, and secondary girder steel 2 can be reinforcing bar or steel strand wires or the tension material such as shaped steel or band steel.
Existing girder steel 1, secondary girder steel 2 and first anchorage the 3, second anchorage 5 firmly connect, steel construction combination beam is collectively constituted with clamp device 4, gravitation bracing frame 6, bear the whole load transmitted by existing girder steel, individually bear load difference with existing girder steel 1 to be, secondary girder steel 2 assume responsibility for fractional load, when making existing girder steel 1 bear load, main mechanical parameter reduces, and reliability adds, and therefore realizes the purpose that steel construction combination beam increases the bearing capacity of existing girder steel.
Claims (7)
1. increase the steel construction combination beam of existing girder steel bearing capacity, it is characterized in that: in existing girder steel (1) parallel beneath, secondary girder steel (2) is set, between existing girder steel (1) and secondary girder steel (2), anchorage (3 is set, 5) and at least one gravitation bracing frame (6), secondary girder steel (2) one end is fixed, the other end connects force application apparatus or secondary girder steel (2) is provided with clamp device (4), existing girder steel (1), secondary girder steel (2) and anchorage (3, 5) firmly connect, with clamp device (4), gravitation bracing frame (6) collectively constitutes the steel construction combination beam increasing bearing capacity.
The steel construction combination beam of increase the most according to claim 1 existing girder steel bearing capacity, it is characterised in that: anchorage (3,5) position is risen at 0～1/3 in existing girder steel end.
The steel construction combination beam of increase the most according to claim 1 existing girder steel bearing capacity, it is characterised in that: the existing girder steel height less than 1.5 times of spacing d between secondary girder steel (2) and existing girder steel (1).
The steel construction combination beam of increase the most according to claim 1 existing girder steel bearing capacity, it is characterized in that: described gravitation bracing frame is height-adjustable gravitation bracing frame, height adjustment range is 1～3 times of the existing girder steel (1) spacing d with secondary girder steel (2), is 0.5～3 times of existing girder steel (1) height simultaneously.
The steel construction combination beam of increase the most according to claim 1 existing girder steel bearing capacity, it is characterised in that: described existing girder steel (1) is shaped steel or steel structure combination beam.
The steel construction combination beam of increase the most according to claim 5 existing girder steel bearing capacity, it is characterised in that: described shaped steel is I-steel, channel-section steel or H profile steel.
The steel construction combination beam of increase the most according to claim 1 existing girder steel bearing capacity, it is characterised in that: secondary girder steel (2) is reinforcing bar or steel strand wires or shaped steel or band steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620029456 | 2016-01-13 | ||
| CN2016200294565 | 2016-01-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105926974A true CN105926974A (en) | 2016-09-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610336861.6A Pending CN105926974A (en) | 2016-01-13 | 2016-05-20 | Steel structure composite beam capable of improving bearing capacity of existing steel beam |
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| Country | Link |
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| CN (1) | CN105926974A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894430A (en) * | 2017-01-03 | 2018-11-27 | 郑瑞平 | A kind of construction method for reinforcing steel structure girder or column |
Citations (6)
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|---|---|---|---|---|
| US5197245A (en) * | 1990-08-13 | 1993-03-30 | Vsl Corporation | Structural wall reinforcement apparatus and method |
| CN1743626A (en) * | 2005-07-29 | 2006-03-08 | 武汉大学 | Method for reinforcing steel beam |
| CN201605825U (en) * | 2009-12-30 | 2010-10-13 | 贵阳铝镁设计研究院 | Steel beam reinforced structure |
| CN103243815A (en) * | 2013-04-10 | 2013-08-14 | 北京筑福国际工程技术有限责任公司 | End-anchored composite beam structure and corresponding reinforcing construction method |
| CN104674679A (en) * | 2013-12-02 | 2015-06-03 | 黑龙江融德建筑技术开发有限公司 | Downward supporting type prestressed strengthened puling rod reinforcing method |
| CN105041001A (en) * | 2015-08-14 | 2015-11-11 | 北京清华同衡规划设计研究院有限公司 | Steel member reinforcing structure |
-
2016
- 2016-05-20 CN CN201610336861.6A patent/CN105926974A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5197245A (en) * | 1990-08-13 | 1993-03-30 | Vsl Corporation | Structural wall reinforcement apparatus and method |
| CN1743626A (en) * | 2005-07-29 | 2006-03-08 | 武汉大学 | Method for reinforcing steel beam |
| CN201605825U (en) * | 2009-12-30 | 2010-10-13 | 贵阳铝镁设计研究院 | Steel beam reinforced structure |
| CN103243815A (en) * | 2013-04-10 | 2013-08-14 | 北京筑福国际工程技术有限责任公司 | End-anchored composite beam structure and corresponding reinforcing construction method |
| CN104674679A (en) * | 2013-12-02 | 2015-06-03 | 黑龙江融德建筑技术开发有限公司 | Downward supporting type prestressed strengthened puling rod reinforcing method |
| CN105041001A (en) * | 2015-08-14 | 2015-11-11 | 北京清华同衡规划设计研究院有限公司 | Steel member reinforcing structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108894430A (en) * | 2017-01-03 | 2018-11-27 | 郑瑞平 | A kind of construction method for reinforcing steel structure girder or column |
| CN109113263A (en) * | 2017-01-03 | 2019-01-01 | 郑瑞平 | Construction method for reinforcing steel structure beam or column |
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Application publication date: 20160907 |