CN105970801B - Eliminate the structure and construction method of lower boom secondary stress at steel girder bridge support - Google Patents
Eliminate the structure and construction method of lower boom secondary stress at steel girder bridge support Download PDFInfo
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- CN105970801B CN105970801B CN201610416575.0A CN201610416575A CN105970801B CN 105970801 B CN105970801 B CN 105970801B CN 201610416575 A CN201610416575 A CN 201610416575A CN 105970801 B CN105970801 B CN 105970801B
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- support
- lower boom
- boom
- vertical bar
- supports
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D6/00—Truss-type bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
Abstract
The invention discloses the structures and construction method of lower boom secondary stress at a kind of elimination steel girder bridge support, are related to steel girder bridge technical field, including a support vertical bar, support vertical bar is set to vertically above support；Top boom at two supports, top boom level is set to upper end two sides and the interconnection of support vertical bar at two supports；Lower boom at two supports, lower boom is set to lower end two sides and the interconnection of support vertical bar at two supports, and lower boom is centered on its intersection point with support center line at two supports, upward from horizontal certain angle.Using the present invention, the holistic resistant behavior of lower boom is greatly improved at support, and the sectional dimension and scale of lower boom are optimized significantly at support, are reduced design difficulty, are simplified connecting structure, save rolled steel dosage, improves the economy of bridge.
Description
Technical field
The present invention relates to steel girder bridge technical fields, and in particular to lower boom secondary stress at a kind of elimination steel girder bridge support
Structure and construction method.
Background technique
With the progress of science and the raising of technological level, the connection of steel girder bridge is changed to height by the connection of initial pin joint
Strength bolts connection, cannot mutually be freely rotated again between each rod piece, connect or splice and also become closer to rigidity, due to
This joint rigidity, relative to traditional steel girder bridge, rod piece also creates larger fixed-end moment other than bearing axial force,
Generating rod piece stress by fixed-end moment is secondary stress.This secondary stress for steel girder bridge general position at, proportion is general
It is smaller, and for lower boom at support, it is general to generate very big secondary stress due to the displacement constraint by support.Therefore, at support
Lower boom generally requires very big structure size to meet overall structure force request, or even needs to increase deck-molding, to steel truss
The control of bridge overall structure scale is very unfavorable, and steel girder bridge overall structure economy is caused to be deteriorated.
Summary of the invention
In view of the deficiencies in the prior art, the purpose of the present invention is to provide under at a kind of elimination steel girder bridge support
The structure and construction method of chord member secondary stress effectively eliminate secondary stress suffered by lower boom, the company of simplifying at steel girder bridge support
Construction is connect, rolled steel dosage is saved.
To achieve the above objectives, the technical solution adopted by the present invention is that: include: a support vertical bar, the support vertical bar is perpendicular
Directly it is set to above the support；Top boom at two supports, top boom level is set to the upper of the support vertical bar at two supports
Hold two sides and interconnection；Lower boom at two supports, lower boom is set to the lower end two sides of the support vertical bar at two supports
And be connected with each other, lower boom is centered on its intersection point with the support center line at two supports, upward from horizontal
Certain angle.
Based on the above technical solution, top boom and the support at the support of described support the same side
Each between place's lower boom to be equipped with the first vertical bar vertically, top boom is far from the branch at first vertical bar one end connection support
Seat one end, the other end connect lower boom at the support and are respectively less than described far from described support one end, the first vertical bar length
Support vertical bar length.
Based on the above technical solution, at the support the acclivitous angle of lower boom be according to the support at
Lower boom is calculated far from secondary stress size and Orientation suffered by described support one end.
Based on the above technical solution, the angle of lower boom upward from horizontal is consistent at two supports.
Based on the above technical solution, top boom and the support at the support of described support the same side
Brace is additionally provided between place's lower boom, it is another far from described support one end that described brace one end connects top boom at the support
End connects lower boom at the support and is connected with the support one end.
The invention also discloses it is a kind of based on eliminate steel girder bridge support at lower boom secondary stress structure construction method,
During steel girder bridge is set up, by applying pre-applied force to lower boom at the support, make at the support lower boom with its with
Upward inclination is generated centered on the intersection point of the support center line, to offset the influence of lower boom secondary stress at the support.
Based on the above technical solution, comprising the following steps:
S1 analyzes steel girder bridge entirety stress condition, calculates as lower boom at the counteracting support far from institute
Secondary stress suffered by support one end is stated, the size for the pre-applied force that lower boom need to apply far from described support one end at the support and institute
State the acclivitous angle of lower boom at support；
S2 is set to top boom and the branch at the support according to the acclivitous angle calculation of lower boom at the support
The first vertical bar at seat between lower boom needs reduced length compared with support vertical bar and corresponding first vertical bar is made；
S3, install top boom at the support, lower boom at support, support vertical bar and be set at the support top boom and
Brace at the support between lower boom；
S4 applies pre-applied force to lower boom at support by the counted pre-applied force size of step S1, make at support lower boom to
Upper inclined angle reaches the counted tilt angle of step S1；
S5 installs first vertical bar, and after steel girder bridge monolithic stability, revocation is applied at support pre- on lower boom
Reinforcing.
Compared with the prior art, the advantages of the present invention are as follows:
The present invention makes at support lower boom with itself and the support center line by applying pre-applied force to lower boom at support
Intersection point centered on generate upward inclination, to offset the influence of lower boom secondary stress at the support.Using the present invention, support
The holistic resistant behavior of place's lower boom is greatly improved, and the sectional dimension and scale of lower boom are optimized significantly at support,
It reduces design difficulty, simplify connecting structure, save rolled steel dosage, improve the economy of bridge.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that lower boom secondary stress at steel girder bridge support is eliminated in the embodiment of the present invention；
Fig. 2 is the stream that the construction method of the structure of lower boom secondary stress at steel girder bridge support is eliminated in the embodiment of the present invention
Journey schematic diagram.
In figure: 1- support vertical bar, 2- support, top boom at 3- support, lower boom at 4- support, the first vertical bar of 5-.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and embodiments.
Shown in Figure 1, the embodiment of the present invention provides a kind of structure for eliminating lower boom secondary stress at steel girder bridge support,
It include: a support vertical bar 1, support vertical bar 1 is set to 2 top of support vertically；Top boom 3 at two supports, 3 water of top boom at two supports
The flat upper end two sides set on support vertical bar 1 and interconnection；Lower boom 4 at two supports, lower boom 4 is perpendicular set on support at two supports
The lower end two sides of bar 1 and interconnection, lower boom 4 is centered on its intersection point with 2 center line of support at two supports, horizontal direction
On be tilted a certain angle.At support the acclivitous angle of lower boom 4 for according to lower boom 4 at support far from 2 one end institute of support
It is calculated by secondary stress size and Orientation.
It is each between lower boom 4 at top boom 3 at the support of 2 the same side of support and support to be equipped with the first vertical bar 5 vertically,
Top boom 3 is far from 2 one end of support at first vertical bar, 5 one end connecting support, and lower boom 4 is far from support 2 at other end connecting support
One end, 5 length of the first vertical bar are respectively less than 1 length of support vertical bar.The angle of 4 upward from horizontal of lower boom is consistent at two supports.
Brace 6,6 one end of brace connection branch are additionally provided between lower boom 4 at top boom 3 at the support of 2 the same side of support and support
Top boom 3 is far from 2 one end of support at seat, and lower boom 4 is connected one end with support 2 at other end connecting support.Top boom 3 at support
With spliced between lower boom 4 by bolt at support vertical bar 1, support vertical bar 1 and support or weld, the first vertical bar 5 at support
Pass through lower edge at top boom 3 at bolt splicing or welding, brace 6 and support and support at top boom 3 and support between lower boom 4
Splice or weld by bolt between bar 4.
The present invention makes at support lower boom 4 with itself and 2 center line of support by applying pre-applied force to lower boom 4 at support
Intersection point centered on generate upward inclination, to offset the influence of 4 secondary stress of lower boom at support.Using the present invention, at support
The holistic resistant behavior of lower boom 4 is greatly improved, and the sectional dimension and scale of lower boom 4 are optimized significantly at support,
It reduces design difficulty, simplify connecting structure, save rolled steel dosage, improve the economy of bridge.
Shown in Figure 2, the invention also discloses a kind of based on the knot for eliminating lower boom secondary stress at steel girder bridge support
The construction method of structure, by applying pre-applied force to lower boom 4 at support, makes lower boom 4 at support during steel girder bridge is set up
Upward inclination is generated centered on its intersection point with 2 center line of support, to offset the influence of 4 secondary stress of lower boom at support.
Specifically includes the following steps:
S1 analyzes steel girder bridge entirety stress condition, calculates as lower boom 4 at counteracting support far from support 2
Secondary stress suffered by one end, lower boom 4 at the size and support of the pre-applied force that lower boom 4 need to apply far from 2 one end of support at support
Acclivitous angle；
S2 is set at support lower boom at top boom 3 and support according to the acclivitous angle calculation of lower boom 4 at support
The first vertical bar 5 between 4 needs reduced length compared with support vertical bar 1 and corresponding first vertical bar 5 is made；
S3, top boom 3 at erection support lower boom 4, support vertical bar 1 and are set to top boom 3 and support at support at support
Locate the brace 6 between lower boom 4；
S4 is applied pre-applied force to lower boom 4 at support, is made lower boom 4 at support by the counted pre-applied force size of step S1
Acclivitous angle reaches the counted tilt angle of step S1；
S5 installs first vertical bar 5, and after steel girder bridge monolithic stability, revocation is applied at support on lower boom 4
Pre-applied force.
Due to the constraint by the first vertical bar 5, after cancelling the pre-applied force that lower boom 4 applies far from 2 one end of support at support,
Lower boom 4 still maintains the fixed-end moment that tilt angle is constant and is generated by pre-applied force far from 2 one end of support at support.To steel truss
When undertaking load after bridge formation monolithic stability, at the fixed-end moment and support that lower boom 4 is generated by pre-applied force at support lower boom 4 because
The fixed-end moment that secondary stress generates is contrary, equal in magnitude, thus cancels out each other.Using the present invention, lower boom 4 at support
Holistic resistant behavior is greatly improved, and the sectional dimension and scale of lower boom 4 are optimized significantly at support, reduces design
Difficulty simplifies connecting structure, saves rolled steel dosage, improves the economy of bridge.
The present invention is not limited to the above-described embodiments, for those skilled in the art, is not departing from
Under the premise of the principle of the invention, several improvements and modifications can also be made, these improvements and modifications are also considered as protection of the invention
Within the scope of.The content being not described in detail in this specification belongs to the prior art well known to professional and technical personnel in the field.
Claims (5)
1. a kind of construction method for eliminating the structure of lower boom secondary stress at steel girder bridge support, which is characterized in that
The structure includes:
One support vertical bar (1), the support vertical bar (1) are set to above the support (2) vertically；
Top boom (3) at two supports, the horizontal upper end two sides for being set to the support vertical bar (1) of top boom (3) at two supports
And it is connected with each other；
Lower boom (4) at two supports, lower boom (4) is set to lower end two sides and the phase of the support vertical bar (1) at two supports
It connects, lower boom (4) is centered on its intersection point with the support (2) center line at two supports, horizontal direction updip
Oblique certain angle；
This method comprises:, by applying pre-applied force to lower boom (4) at the support, making described during steel girder bridge is set up
Lower boom (4) generates upward inclination centered on its intersection point with the support (2) center line at support, to offset the branch
The influence of lower boom (4) secondary stress at seat；Specifically comprise the following steps:
S1 analyzes steel girder bridge entirety stress condition, calculates separate described to offset lower boom (4) at the support
Secondary stress suffered by support (2) one end, the pre-applied force that lower boom (4) need to apply far from the support (2) one end at the support
Lower boom (4) acclivitous angle at size and the support；
S2 is set to top boom (3) and described at the support according to lower boom (4) acclivitous angle calculation at the support
The first vertical bar (5) at support between lower boom (4) needs reduced length compared with support vertical bar (1) and is made corresponding first
Vertical bar (5)；
S3 installs top boom (3) at the support, lower boom (4) at support, support vertical bar (1) and is set at the support
Brace (6) at chord member (3) and the support between lower boom (4)；
S4 is applied pre-applied force to lower boom at support (4), is made lower boom at support (4) by the counted pre-applied force size of step S1
Acclivitous angle reaches the counted tilt angle of step S1；
S5 installs first vertical bar (5), and after steel girder bridge monolithic stability, revocation is applied on lower boom at support (4)
Pre-applied force.
2. construction method as described in claim 1, it is characterised in that: be located at the support of the support (2) the same side
Each between lower boom (4) at top boom (3) and the support to be equipped with the first vertical bar (5) vertically, described first vertical bar (5) one end connects
Connecing top boom (3) at the support, far from the support (2) one end, the other end connects the separate institute of lower boom (4) at the support
Support (2) one end is stated, the first vertical bar (5) length is respectively less than support vertical bar (1) length.
3. construction method as described in claim 1, it is characterised in that: lower boom (4) acclivitous angle at the support
It is calculated for the secondary stress size and Orientation according to suffered by the separate support (2) one end of lower boom (4) at the support.
4. construction method as described in claim 1, it is characterised in that: lower boom (4) upward from horizontal at two supports
Angle it is consistent.
5. construction method as described in claim 1, it is characterised in that: be located at the support of the support (2) the same side
Brace (6) are additionally provided between lower boom (4) at top boom (3) and the support, described brace (6) one end connects at the support
Far from the support (2) one end, the other end connects lower boom (4) at the support and is connected one with the support (2) top boom (3)
End.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416575.0A CN105970801B (en) | 2016-06-15 | 2016-06-15 | Eliminate the structure and construction method of lower boom secondary stress at steel girder bridge support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416575.0A CN105970801B (en) | 2016-06-15 | 2016-06-15 | Eliminate the structure and construction method of lower boom secondary stress at steel girder bridge support |
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| Publication Number | Publication Date |
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| CN105970801A CN105970801A (en) | 2016-09-28 |
| CN105970801B true CN105970801B (en) | 2019-06-25 |
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| JP2015183351A (en) * | 2014-03-20 | 2015-10-22 | 国立大学法人 名古屋工業大学 | Structure for preventing collapse of truss bridge |
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| CN205188842U (en) * | 2015-12-04 | 2016-04-27 | 长沙理工大学 | Steel longeron suspension bridge decking is rectified to reset and is pushed up construction system that pushes away |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101191647B1 (en) * | 2010-05-28 | 2012-10-17 | (주)삼현피에프 | Constructing method of continuous bridge with complex upper structure |
| US9422680B2 (en) * | 2014-04-14 | 2016-08-23 | Guido FURLANETTO | Deck |
-
2016
- 2016-06-15 CN CN201610416575.0A patent/CN105970801B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201148590Y (en) * | 2008-01-08 | 2008-11-12 | 长安大学 | Simply supported rotating continuous beam bridge composed of rectangular steel pipe girders |
| JP2015183351A (en) * | 2014-03-20 | 2015-10-22 | 国立大学法人 名古屋工業大学 | Structure for preventing collapse of truss bridge |
| CN205012666U (en) * | 2015-09-17 | 2016-02-03 | 浙江中成建工集团有限公司 | High altitude steel construction vestibule integrally lift up support structure |
| CN205188842U (en) * | 2015-12-04 | 2016-04-27 | 长沙理工大学 | Steel longeron suspension bridge decking is rectified to reset and is pushed up construction system that pushes away |
Non-Patent Citations (1)
| Title |
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| 京沪高速铁路济南黄河大桥钢梁架设施工技术;匿名;《百度文库》;20120331;第4章，第五章第1节，第六章第2节 |
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| CN105970801A (en) | 2016-09-28 |
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