CN104458402A - Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars - Google Patents
Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars Download PDFInfo
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- CN104458402A CN104458402A CN201410759995.XA CN201410759995A CN104458402A CN 104458402 A CN104458402 A CN 104458402A CN 201410759995 A CN201410759995 A CN 201410759995A CN 104458402 A CN104458402 A CN 104458402A
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Abstract
The invention discloses a method for testing a specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars. The method comprises the following steps: firstly applying a 2KN load to a specimen beam before official start of a load test, carrying out pre-loading and then removing the load to finish pre-loading; increasing the applied loads step by step by adopting a step loading method before the specimen beam locally equipped with CFRP-PCPs has cracks, and checking and observing the specimen beam locally equipped with the CFRP-PCPs at the same time when loading in each step is finished; when the applied loads reach a cracking load, reading the width of the cracks, recording the heights of the cracks and distances between the cracks, and drawing a crack developing process on coordinate paper at the same time; after the specimen beam locally equipped with the CFRP-PCPs composite rebars cracks, raising a variable load increased in each step to 10KN, photographing and recording the whole loading phenomenon as well after loading in each step is finished, and measuring and reading the width and heights of the cracks and the distances between the cracks at the same time; carrying out the processes until the specimen locally equipped with the CFRP-PCPs composite rebars is loaded till damage. The method has the characteristics of real-time control and small errors.
Description
Technical field
The invention belongs to technical field of buildings, refer more particularly to the test specimen method for making of CFRP-PCPs composite reinforcing.
Background technology
Concrete is one of building materials commonly used in modern construction engineering, at present to the theory of concrete material permanance and the focus of civil engineering work research when testing.In recent years, along with carbon fiber (Carbon Fiber Reinforced Polymer, the CFRP) design theory of muscle material and the maturation of operating technique, become the ideal substitute of reinforcing bar gradually, and apply in Practical Project.But itself be the material of high strength low elastic modulus, effectively cannot control the production process of distress in concrete, the shortcoming such as on-the-spot stretch-draw prestressing force operating difficulties in its shear resistance difference and construction, in building structure, its performance can not give full play to.For making full use of the advantage such as high-strength anticorrosive of FRP material, solve itself Problems existing simultaneously, need to make CFRP-PCPs (Carbon Fiber Reinforced Polymer-Prestressed Concrete Prisms) composite reinforcing test block to carry out Improvement and perfection.CFRP-PCPs composite reinforcing refers to the muscle material that CFRP muscle and high-performance RPC are combined.
Summary of the invention
The present invention is intended to the defect overcoming prior art, provides the test method containing CFRP-PCPs composite reinforcing test specimen, has real-time control, feature that error is little.
In order to solve the problems of the technologies described above, the invention provides following technical scheme:
Containing CFRP-PCPs composite reinforcing specimen test method, comprise the steps, before load test formally starts, first test specimen beam is applied to the load of 2KN, carry out prestrain, then removal load completes prestrain;
Take the method for hierarchical loading, join in local before crack appears in CFRP-PCPs test specimen beam, increase the load of applying step by step, simultaneously at the end of every grade loads, CFRP-PCPs test specimen beam is joined to local and carries out checking and observe;
When the load loaded reaches cracking load, read the width in crack, the record height in crack and the spacing in crack, describe the process of crack developing simultaneously at coordinate paper; After joining CFRP-PCPs composite reinforcing test specimen beam cracking from local, every grade of variable load increased rises to 10KN, loads equally and terminates, will carry out Taking Pictures recording, survey width, height and the average headway of reading crack simultaneously to the loading phenomenon of entirety at every grade;
Until CFRP-PCPs composite reinforcing test specimen is joined in local be loaded on destruction.
Second step is taked every 2KN to be one and is loaded grade.
Before test specimen destroys, when load is applied to reinforcement yielding intensity, adopt MTS Based on Electro-hydraulic Loading Servo System Bit andits control.
Compared with prior art, the present invention has following beneficial effect:
This test method can implement the real-time control system of load loading procedure, and hierarchical loading load to measure the actual loading be loaded on component, reduces error.
Accompanying drawing explanation
Fig. 1 is the loading schematic diagram of CFRP-PCPs composite reinforcing test specimen of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
As shown in Figure 1, containing CFRP-PCPs composite reinforcing specimen test method, comprise the steps, before load test formally starts, first test specimen beam is applied to the load of 2KN, carry out prestrain, then removal load completes prestrain;
Take the method for hierarchical loading, join in local before crack appears in CFRP-PCPs test specimen beam 1, increase the load of applying step by step, simultaneously at the end of every grade loads, CFRP-PCPs test specimen beam is joined to local and carries out checking and observe; Take every 2KN to be one and load grade.
When the load loaded reaches cracking load, read the width in crack, the record height in crack and the spacing in crack, describe the process of crack developing simultaneously at coordinate paper; After joining CFRP-PCPs composite reinforcing test specimen beam cracking from local, every grade of variable load increased rises to 10KN, loads equally and terminates, will carry out Taking Pictures recording, survey width, height and the average headway of reading crack simultaneously to the loading phenomenon of entirety at every grade;
Before test specimen destroys, when load is applied to reinforcement yielding intensity, adopt MTS Based on Electro-hydraulic Loading Servo System Bit andits control.
Until CFRP-PCPs composite reinforcing test specimen is joined in local be loaded on destruction.
Charger of the present invention adopts introduces MTS Based on Electro-hydraulic Loading Servo System from American MTS company, it can realize load, displacement with dual parameter controlled loading, also the research of static(al), Quintic system, fatigue and pseudo be can carry out, particularly can multi-support and multi-dimension Quintic system and pseudo-dynamic equation be carried out.Can not only being controlled the process loaded, and can control final result well, is the real-time control system implementing load loading procedure.
The foregoing is only explanation embodiments of the present invention; be not limited to the present invention, for a person skilled in the art, within the spirit and principles in the present invention all; any amendment of doing, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the test method containing CFRP-PCPs composite reinforcing test specimen, comprises the steps, it is characterized in that: before load test formally starts, and first test specimen beam is applied to the load of 2KN, carry out prestrain, then removal load completes prestrain;
Take the method for hierarchical loading, join in local before crack appears in CFRP-PCPs test specimen beam, increase the load of applying step by step, simultaneously at the end of every grade loads, CFRP-PCPs test specimen beam is joined to local and carries out checking and observe;
When the load loaded reaches cracking load, read the width in crack, the record height in crack and the spacing in crack, describe the process of crack developing simultaneously at coordinate paper; After joining CFRP-PCPs composite reinforcing test specimen beam cracking from local, every grade of variable load increased rises to 10KN, loads equally and terminates, will carry out Taking Pictures recording, survey width, height and the average headway of reading crack simultaneously to the loading phenomenon of entirety at every grade;
Until CFRP-PCPs composite reinforcing test specimen is joined in local be loaded on destruction.
2. the test method according to claim 1 containing CFRP-PCPs composite reinforcing test specimen, is characterized in that: second step is taked every 2KN to be one and loaded grade.
3. the test method according to claim 1 containing CFRP-PCPs composite reinforcing test specimen, is characterized in that: before test specimen destroys, when load is applied to reinforcement yielding intensity, adopts MTS Based on Electro-hydraulic Loading Servo System Bit andits control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759995.XA CN104458402A (en) | 2014-12-13 | 2014-12-13 | Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410759995.XA CN104458402A (en) | 2014-12-13 | 2014-12-13 | Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
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| CN104458402A true CN104458402A (en) | 2015-03-25 |
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| CN201410759995.XA Pending CN104458402A (en) | 2014-12-13 | 2014-12-13 | Method for manufacturing specimen containing CFRP-PCPs (carbon fiber reinforced polymer-prestressed concrete prisms) composite rebars |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201649444U (en) * | 2010-04-28 | 2010-11-24 | 西安建筑科技大学 | Novel prestressed composite FRP reinforcing bar |
| CN201695573U (en) * | 2010-06-21 | 2011-01-05 | 广西工学院 | Novel fiber-reinforced plastic (FRP)-prestressed concrete prisms (PCPs) composite bar concrete beam |
| CN201952969U (en) * | 2011-01-25 | 2011-08-31 | 广西工学院 | Novel FRP (Fiber Reinforced Plastic) prestressed concrete slab |
| CN103205755A (en) * | 2013-04-16 | 2013-07-17 | 深圳大学 | Cathode protection method and cathode protection device for reinforced concrete adopting CFRP (carbon fibre reinforced plastics) embedded anode |
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2014
- 2014-12-13 CN CN201410759995.XA patent/CN104458402A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201649444U (en) * | 2010-04-28 | 2010-11-24 | 西安建筑科技大学 | Novel prestressed composite FRP reinforcing bar |
| CN201695573U (en) * | 2010-06-21 | 2011-01-05 | 广西工学院 | Novel fiber-reinforced plastic (FRP)-prestressed concrete prisms (PCPs) composite bar concrete beam |
| CN201952969U (en) * | 2011-01-25 | 2011-08-31 | 广西工学院 | Novel FRP (Fiber Reinforced Plastic) prestressed concrete slab |
| CN103205755A (en) * | 2013-04-16 | 2013-07-17 | 深圳大学 | Cathode protection method and cathode protection device for reinforced concrete adopting CFRP (carbon fibre reinforced plastics) embedded anode |
Non-Patent Citations (1)
| Title |
|---|
| 屈建: "新型CFRP-PCPs复合筋混凝土梁受力性能试验研究与理论分析", 《CNKI优秀硕士学位论文全文库》 * |
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Application publication date: 20150325 |