Loading device for thermally induced concrete peeling test and use method thereof
A loading device, concrete technology, applied in the direction of measuring device, using to apply stable tension/compression to test material strength, instrument, etc., can solve the problems of internal reinforcement or prestress direct heat exposure, cross-section loss, structural collapse, etc.
Pending Publication Date: 2021-10-01
CHINA RAILWAY 24TH BUREAU GRP
View PDF10 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In such cases, the concrete structure is often drastically altered and can result in severe loss of cross-section, direct thermal exposure of internal reinforcement or prestress, and structural collapse
Thermally induced explosive concrete spalling in fires therefore poses a significant risk to reinforced and prestressed concrete structures
[0003] Due to the complexity of thermally induced explosive exfoliation, it is difficult for traditional loading devices and methods to apply uniaxial external loads while heating, and it is also difficult to control the mechanical boundary conditions with high precision under a series of related heating schemes to complete the test reproducibly
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0032] Example: such as Figure 1-8 As shown, this embodiment relates to a loading device used in a heat-induced concrete spalling test, mainly including two first-level I-beam beams, four secondary beams, four pull rods 2 and a hydraulic system, two first-level workers The steel crossbeams are arranged up and down relative to each other, which are the upper first-class I-steel crossbeam 4 and the lower one-class I-steel crossbeam 18, and the space formed between the lower first-class I-steel crossbeam 18 and the upper first-class I-steel crossbeam 4, which can be used Place the thermally induced concrete explosion spalling test piece 1, and the contact surfaces of the thermally induced concrete explosive spalling test piece 1, the lower first-level I-beam beam 18, and the upper first-level I-beam beam 4 are respectively covered with medical plaster 10 , used to protect thermally induced concrete explosion spalling specimen 1. The four secondary beams are arranged in pairs on...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a loading device for a thermally induced concrete peeling test and a use method thereof. The loading device comprises a lower secondary cross beam, a lower primary I-shaped steel cross beam, an upper primary I-shaped steel cross beam and an upper secondary cross beam which are sequentially arranged from bottom to top, a space for placing a thermally induced concrete explosion stripping test piece can be formed between the lower primary I-shaped steel cross beam and the upper primary I-shaped steel cross beam, the upper secondary cross beam is mounted at the upper part of the upper primary I-shaped steel cross beam, and the upper secondary cross beam is connected with the lower secondary cross beam through a pull rod; and the device also comprises a hydraulic system, the hydraulic system comprises a jack, a hydraulic pump connected with the jack, a pressure sensor mounted on a hydraulic pipeline of the hydraulic pump and a manual pressure reducing valve mounted on the hydraulic pump, the lower part of the jack is connected with the upper part of the lower secondary cross beam, and the upper part of the jack is connected with the lower part of the lower primary I-shaped steel cross beam. The device has the advantages that: a repeatability test is realized, and a damage mechanism of thermally induced concrete burst is obtained.
Description
technical field [0001] The invention relates to the technical field of concrete structure testing, in particular to a loading device used in a heat-induced concrete spalling test and an application method thereof. Background technique [0002] Modern concrete is increasingly susceptible to a failure mechanism known as thermoinduced concrete cracking. This includes sudden loss of material during severe heat exposure, which often occurs in fires. In such cases, the concrete structure is often drastically altered and can result in severe loss of cross-section, direct thermal exposure of internal reinforcement or prestress, and structural collapse. Therefore, thermally induced explosive concrete spalling in fires poses a huge risk to reinforced and prestressed concrete structures. [0003] Due to the complexity of thermally induced explosive exfoliation, it is difficult for traditional loading devices and methods to apply uniaxial external loads while heating, and it is also d...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N3/12G01N3/02
CPCG01N3/18G01N3/12G01N3/02G01N2203/0019G01N2203/0048G01N2203/0067G01N2203/0226
Inventor 刘锋张绳忠黄瑞堂宗维凯李厚荣刘亚帅杜显平赵敏傅启良
Owner CHINA RAILWAY 24TH BUREAU GRP