CN109632219A - The test method of armored concrete beam deflection - Google Patents
The test method of armored concrete beam deflection Download PDFInfo
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- CN109632219A CN109632219A CN201811598087.1A CN201811598087A CN109632219A CN 109632219 A CN109632219 A CN 109632219A CN 201811598087 A CN201811598087 A CN 201811598087A CN 109632219 A CN109632219 A CN 109632219A
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- deflection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
- G01M5/0058—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems of elongated objects, e.g. pipes, masts, towers or railways
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of test methods of armored concrete beam deflection, comprising steps of the moment of flexure of detection reinforced beam and the reality of reinforced beam match reinforcing bar；The long-term stiffness of each bridge is obtained according to moment of flexure and real reinforcing bar of matching；Detect the vertical displacement of space structure；The elastic deflection value for calculating reinforced beam, obtains elastic stiffness and long-term stiffness ratio；Using elastic stiffness and long-term stiffness than the product with elastic deflection value as the deflection value of reinforced beam.The amount of deflection that can be adapted for all beams calculates, and calculated result is more accurate.The deflection value that beam can be efficiently controlled meets Criterion restriction.
Description
Technical field
The invention belongs to building engineering technical fields, more particularly to a kind of test side of armored concrete beam deflection
Method.
Background technique
Building engineering, most building cover structures are space structure, it is difficult to be simplified to single beam and carry out
It calculates.There is a problem of larger, the process of deflection design when checking beam deflection at present are as follows:
1) spatially structure using modal analysis method calculate beam internal force and arrangement of reinforcement；
2) it is carried out by the arrangement of reinforcement value calculated real with reinforcing bar；
3) support, non-support or free end are judged as according to support relation to node each on beam, the beam section between adjacent support
For a bridge, support to free end is a Cantilever Beams.Support or non-support can be artificially adjusted, support may be defined as letter
Branch or fixed end；
4) according to moment of flexure and the real long-term stiffness for calculating each bridge with reinforcing rib meter；
5) independent to take out beam and corresponding load is used as single beam thereon to each bridge, by beam-ends be freely-supported, fixed end or oneself
By holding corresponding flexibility factor to carry out amount of deflection calculating.
When deflection design, continuous beam is split as single beam, the boundary condition of consideration is relatively easy: complete freely-supported, fixed end
Or free end.
The above method can be adapted for the little continuous beam of span and different loading.Larger, big outstanding is differed for span
It chooses or load differs biggish beam and is not suitable for.
Summary of the invention
It for the above technical problems, can the invention proposes a kind of test method of armored concrete beam deflection
It is calculated with being suitable for the amount of deflection of all beams, and calculated result is more accurate.The deflection value that beam can be efficiently controlled meets specification
Limit value.
The technical scheme is that
A kind of test method of armored concrete beam deflection, comprising the following steps:
S01: the moment of flexure of reinforced beam and the reality of reinforced beam are detected with reinforcing bar；
S02: the long-term stiffness of each bridge is obtained according to moment of flexure and real reinforcing bar of matching；
S03: the vertical displacement of space structure is detected；
S04: calculating the elastic deflection value of reinforced beam, obtains elastic stiffness and long-term stiffness ratio；
S05: using elastic stiffness and long-term stiffness than the product with elastic deflection value as the deflection value of reinforced beam.
In preferred technical solution, the elastic deflection valueWherein, a is flexibility factor, and q is load,
L is span, and f (q, l) is function relevant to load and span, and EI is elastic stiffness.
Compared with prior art, the invention has the advantages that
The boundary condition that this method calculates beam deflection is identical as the boundary condition of real space, it is contemplated that space-load is examined
Support vertical deflection and corner are considered.Amount of deflection suitable for all beams calculates, and calculated result is more accurate.It can effectively control
The deflection value of beam processed meets Criterion restriction, and structure is made to meet the requirement of normal use.
Detailed description of the invention
The invention will be further described with reference to the accompanying drawings and embodiments:
Fig. 1 is the flow chart of the test method of armored concrete beam deflection of the present invention.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, With reference to embodiment and join
According to attached drawing, the present invention is described in more detail.It should be understood that these descriptions are merely illustrative, and it is not intended to limit this hair
Bright range.In addition, in the following description, descriptions of well-known structures and technologies are omitted, to avoid this is unnecessarily obscured
The concept of invention.
Embodiment:
With reference to the accompanying drawing, presently preferred embodiments of the present invention is described further.
As shown in Figure 1, a kind of test method of armored concrete beam deflection, comprising the following steps:
S01: the moment of flexure of reinforced beam and the reality of reinforced beam are detected with reinforcing bar；
S02: the long-term stiffness B of each bridge is obtained according to moment of flexure and real reinforcing bar of matching；
S03: the vertical displacement of space structure is detected；The vertical displacement of space structure is the vertical deflection of support
And corner.
S04: calculating the elastic deflection value of reinforced beam, obtains elastic stiffness and long-term stiffness ratio；
S05: using elastic stiffness and long-term stiffness than the product with elastic deflection value as the deflection value of reinforced beam
F, i.e.,
Elastic deflection valueWherein, a is flexibility factor, and q is load, and l is span, and f (q, l) is and lotus
Function relevant with span is carried, EI is elastic stiffness.
Consider space-load, it is contemplated that support vertical deflection and corner.Amount of deflection suitable for all beams calculates, and calculates
As a result more accurate.The deflection value that beam can be efficiently controlled meets Criterion restriction, and structure is made to meet the requirement of normal use.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention
Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention
Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing
Change example.
Claims (2)
1. a kind of test method of armored concrete beam deflection, which comprises the following steps:
S01: the moment of flexure of reinforced beam and the reality of reinforced beam are detected with reinforcing bar；
S02: the long-term stiffness of each bridge is obtained according to moment of flexure and real reinforcing bar of matching；
S03: the vertical displacement of space structure is detected；
S04: calculating the elastic deflection value of reinforced beam, obtains elastic stiffness and long-term stiffness ratio；
S05: using elastic stiffness and long-term stiffness than the product with elastic deflection value as the deflection value of reinforced beam.
2. the test method of armored concrete beam deflection according to claim 1, which is characterized in that the elastic deflection valueWherein, a is flexibility factor, and q is load, and l is span, and f (q, l) is function relevant to load and span,
EI is elastic stiffness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598087.1A CN109632219A (en) | 2018-12-26 | 2018-12-26 | The test method of armored concrete beam deflection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811598087.1A CN109632219A (en) | 2018-12-26 | 2018-12-26 | The test method of armored concrete beam deflection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109632219A true CN109632219A (en) | 2019-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201811598087.1A Pending CN109632219A (en) | 2018-12-26 | 2018-12-26 | The test method of armored concrete beam deflection |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749246A (en) * | 2011-12-22 | 2012-10-24 | 同济大学 | Prestress type steel-concrete structure using performance design method |
| CN107563049A (en) * | 2017-08-30 | 2018-01-09 | 郑州大学 | A kind of design method of Steel Fiber Recycled Concrete beam |
-
2018
- 2018-12-26 CN CN201811598087.1A patent/CN109632219A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749246A (en) * | 2011-12-22 | 2012-10-24 | 同济大学 | Prestress type steel-concrete structure using performance design method |
| CN107563049A (en) * | 2017-08-30 | 2018-01-09 | 郑州大学 | A kind of design method of Steel Fiber Recycled Concrete beam |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国住房和城乡建设部: "《GB50010-2010混凝土结构设计规范(2015年版)》", 31 December 2015, 中国建筑工业出版社 * |
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Application publication date: 20190416 |
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