CN209784081U - device for testing stress strain of sample to be tested at high temperature - Google Patents
device for testing stress strain of sample to be tested at high temperature Download PDFInfo
- Publication number
- CN209784081U CN209784081U CN201920375865.4U CN201920375865U CN209784081U CN 209784081 U CN209784081 U CN 209784081U CN 201920375865 U CN201920375865 U CN 201920375865U CN 209784081 U CN209784081 U CN 209784081U
- Authority
- CN
- China
- Prior art keywords
- heating test
- test furnace
- sample
- cylinder
- tested
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a device for testing the stress strain of a sample to be tested at high temperature, which is used for the fire resistance test of a steel structure; the method comprises the following steps: the device comprises a universal testing machine, a heating test furnace, a high-temperature extensometer and a high-temperature resistant camera; the heating test furnace is arranged on the base table-board of the universal testing machine through a first support, and the heating test furnace and the universal testing machine are coaxially arranged; the sample to be tested is clamped between the top surface of the universal testing machine and the table surface of the base and penetrates through the heating test furnace; the high-temperature extensometer extends into the heating test furnace through a preformed hole on the side wall of the heating test furnace and is in contact with a sample to be tested; the high-temperature resistant camera is welded on the outer side of the side wall of the heating test furnace through the second support and aligned with the reserved hole in the side wall of the heating test furnace, so that the test condition in the heating test furnace can be observed and recorded.
Description
Technical Field
The utility model relates to a steel construction fire prevention technical field especially relates to the device of test hold concurrently of steel construction material nature under the high temperature.
Background
The fire-resistant design of the steel structure is particularly important because the fire-resistant design of the steel structure is more and more noticed by people because the steel structure often causes serious consequences when a fire breaks out. The poor fire resistance of steel structure is because steel heat conductivility is good, and the component heaies up rapidly under the conflagration, and second steel intensity reduces rapidly along with the temperature rise, leads to the steel member bearing capacity to reduce and become invalid. Previous studies have focused on the load bearing capacity of the connection, and in practice the deformability is also important. On one hand, the deformation capacity is enough, and the steel nodes can play a better role, and each bolt can be just stressed uniformly if connected by the bolt; on the other hand, the bearing capacity of the connection at high temperature determines the determined rotation capacity, and sufficient rotation capacity is the basis for the beam catenary effect and the floor slab film effect.
Therefore, if the deformation condition of the steel materials before the stress damage at high temperature is known, the steel structure fire resistance data are provided, the damage of fire disasters to the building steel structure can be reduced, the fire extinguishment and personnel evacuation difficulties caused by the local collapse of the structure in the fire disasters and the casualties caused by the integral collapse in the fire disasters can be avoided, the post-disaster repair cost is reduced, and the scientific structure fire resistance design is carried out on the steel structures.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the main technical problem that a device and method of stress strain under test sample high temperature is provided, can also observe the steel condition of deformation simultaneously measuring, the test result can be arranged in predicting the deformation of steel construction bearing capacity among the actual engineering.
In order to solve the above method, the utility model provides a device for testing the stress strain of the sample to be tested at high temperature, which is used for the fire resistance test of the steel structure; the method comprises the following steps: the device comprises a universal testing machine, a heating test furnace, a high-temperature extensometer and a high-temperature resistant camera;
The heating test furnace is arranged on the base table-board of the universal testing machine through a first support, and the heating test furnace and the universal testing machine are coaxially arranged;
The sample to be tested is clamped between the top surface of the universal testing machine and the table surface of the base and penetrates through the heating test furnace; the high-temperature extensometer extends into the heating test furnace through a preformed hole on the side wall of the heating test furnace and is in contact with a sample to be tested;
The high-temperature resistant camera is welded on the outer side of the side wall of the heating test furnace through the second support and aligned with the reserved hole in the side wall of the heating test furnace, so that the test condition in the heating test furnace can be observed and recorded.
In a preferred embodiment: the heating test furnace is a cylinder, and the holding cavity for holding the sample to be tested is arranged in the direction of the central axis in a penetrating mode.
In a preferred embodiment: the sample to be tested comprises a first cylinder and a second cylinder which are arranged up and down and have equal diameters, and a third cylinder arranged between the first cylinder and the second cylinder, wherein the diameter of the third cylinder is smaller than that of the first cylinder, and two ends of the third cylinder are respectively connected to the first cylinder and the second cylinder through round tables in a transition mode.
Compared with the prior art, the utility model has the advantages of it is following and positive effect:
1. The deformation of the steel at different temperatures before the bearing capacity is damaged can be observed, and the bearing capacity of the steel at different temperatures can be measured.
2. the deformation of the steel at high temperature before the bearing capacity is damaged can be estimated.
3. the test operation process is convenient, and the test material or the force measurement and observation device carried out at high temperature is common material in the market, is easy to obtain materials and is simple and convenient to operate.
Drawings
FIG. 1 is a schematic view of a heating test furnace in a preferred embodiment of the present invention;
Fig. 2 is a schematic diagram of a sample to be tested in the preferred embodiment of the present invention;
Fig. 3 is an overall schematic view of the device for testing stress-strain of the sample to be tested at high temperature according to the preferred embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention clearer, the present invention will now be further described with reference to the accompanying drawings and embodiments.
Referring to fig. 1-3, the utility model provides a device for testing the stress strain of a sample to be tested at high temperature, which is used for the fire resistance test of a steel structure; the method comprises the following steps: the device comprises a universal testing machine 1, a heating testing furnace 2, a high-temperature extensometer 3 and a high-temperature resistant camera 4;
the heating test furnace 2 is arranged on the base table-board of the universal testing machine 1 through a first support, and the heating test furnace 2 and the universal testing machine 1 are coaxially arranged;
The sample 5 to be tested is clamped between the top surface of the universal testing machine 1 and the table surface of the base and penetrates through the heating test furnace 2; the high-temperature extensometer 3 extends into the heating test furnace 2 through a preformed hole on the side wall of the heating test furnace 2 and is in contact with a sample 5 to be tested;
The high temperature resistant camera 4 passes through the second support welding in the lateral wall outside of heating test furnace 2 to align with the preformed hole of heating test furnace 2 lateral wall, with the inside experimental condition of observation and record heating test furnace 2.
In this embodiment, the heating test furnace 2 is a cylinder, and it runs through along the axis direction and is provided with the holding chamber that is used for placing the sample 5 that awaits measuring.
The sample 5 to be tested comprises a first cylinder and a second cylinder which are arranged up and down and have equal diameters, and a third cylinder arranged between the first cylinder and the second cylinder, wherein the diameter of the third cylinder is smaller than that of the first cylinder, and two ends of the third cylinder are respectively connected to the first cylinder and the second cylinder through round tables in a transition mode.
The embodiment also provides a method for testing the stress strain of the sample 5 to be tested at high temperature by using the device, which comprises the following steps:
(1) according to the requirements of size in the method GB/T4338-2006 for testing the high-temperature tensile of the metal material, selecting the reasonable size of the sample 5 to be tested, and processing the sample 5 to be tested in a processing plant according to the size requirements.
(2) the test furnace is embedded on the base table of the universal testing machine through the support, so that the center of the test furnace and the center of the universal testing machine can be kept on the same straight line at each time, deviation does not occur, and the test result is more accurate.
(3) put into heating test furnace 2 with the test piece in, close heating test furnace 2, then with the 3 meters of high temperature extensometer through the preformed hole of heating test furnace 2 with the sample 5 contact that awaits measuring, what 3 meters of high temperature extensometer adopted is CBYDG high temperature extensometer, this high temperature extensometer 3 is the automatic settlement gauge length, can realize quick installation, specifically sees the instruction of this high temperature extensometer 3.
(4) The high temperature resistant camera 4 is welded outside the heating test furnace 2 through welding technology, the test condition inside the heating test furnace 2 is observed through a preformed hole, the high temperature resistant camera 4 is opened after the sample 5 to be tested is placed, and the apparent phenomenon of the sample 5 to be tested is observed and recorded.
(5) After the test piece 5, the high-temperature extensometer 3 and the high-temperature resistant camera 4 are set, the heating rate of the heating test furnace 2 is set to be 15 ℃/min. When the test is started, firstly, the heating test furnace 2 is increased to be 30 ℃ lower than the specified temperature according to the set heating rate, the temperature is kept for 10min, the load of the universal testing machine 1 is set to be zero in the heating and constant temperature process, and the sample 5 to be tested is allowed to freely expand; and then setting the heating test furnace 2 to the target temperature and keeping the temperature for 20 minutes, and loading the sample 5 to be tested through the universal testing machine 1.
(6) In the loading process of the universal tester 1, the heating test furnace 2 keeps the temperature constant, the strain rate is 0.25%/min, and the sample 5 to be tested is broken.
(4) Through data acquisition of the high-temperature extensometer 3, a stress-strain relation curve of the sample 5 to be measured can be obtained, the data can be derived from a computer, and the appearance change condition of the sample 5 to be measured in the whole process can be obtained through the high-temperature resistant camera 4.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and variations or technical scopes of the present invention can be easily conceived by those skilled in the art. Alternatives are intended to be within the scope of the invention. Therefore, the protection scope of the present invention should be determined by the scope of the claims.
Claims (3)
1. a device for testing the stress strain of a sample to be tested at high temperature is used for a steel structure fire resistance test; it is characterized by comprising: the device comprises a universal testing machine, a heating test furnace, a high-temperature extensometer and a high-temperature resistant camera;
the heating test furnace is arranged on the base table-board of the universal testing machine through a first support, and the heating test furnace and the universal testing machine are coaxially arranged;
The sample to be tested is clamped between the top surface of the universal testing machine and the table surface of the base and penetrates through the heating test furnace; the high-temperature extensometer extends into the heating test furnace through a preformed hole on the side wall of the heating test furnace and is in contact with a sample to be tested;
The high-temperature resistant camera is welded on the outer side of the side wall of the heating test furnace through the second support and aligned with the reserved hole in the side wall of the heating test furnace, so that the test condition in the heating test furnace can be observed and recorded.
2. the device for testing the stress-strain of the sample to be tested at high temperature according to claim 1, which is characterized in that: the heating test furnace is a cylinder, and the holding cavity for holding the sample to be tested is arranged in the direction of the central axis in a penetrating mode.
3. The device for testing the stress-strain of the sample to be tested at high temperature according to claim 2, characterized in that: the sample to be tested comprises a first cylinder and a second cylinder which are arranged up and down and have equal diameters, and a third cylinder arranged between the first cylinder and the second cylinder, wherein the diameter of the third cylinder is smaller than that of the first cylinder, and two ends of the third cylinder are respectively connected to the first cylinder and the second cylinder through round tables in a transition mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920375865.4U CN209784081U (en) | 2019-03-22 | 2019-03-22 | device for testing stress strain of sample to be tested at high temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920375865.4U CN209784081U (en) | 2019-03-22 | 2019-03-22 | device for testing stress strain of sample to be tested at high temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209784081U true CN209784081U (en) | 2019-12-13 |
Family
ID=68799051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920375865.4U Active CN209784081U (en) | 2019-03-22 | 2019-03-22 | device for testing stress strain of sample to be tested at high temperature |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209784081U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883854A (en) * | 2019-03-22 | 2019-06-14 | 华侨大学 | A kind of device and method for testing ess-strain under sample to be tested high temperature |
| CN111220477A (en) * | 2020-01-16 | 2020-06-02 | 中国科学院长春光学精密机械与物理研究所 | Device and method for measuring micro yield strength of composite material rod |
-
2019
- 2019-03-22 CN CN201920375865.4U patent/CN209784081U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109883854A (en) * | 2019-03-22 | 2019-06-14 | 华侨大学 | A kind of device and method for testing ess-strain under sample to be tested high temperature |
| CN111220477A (en) * | 2020-01-16 | 2020-06-02 | 中国科学院长春光学精密机械与物理研究所 | Device and method for measuring micro yield strength of composite material rod |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209784081U (en) | device for testing stress strain of sample to be tested at high temperature | |
| CN109507037B (en) | Small punch creep test device and method capable of realizing accurate continuous loading | |
| Krzemień et al. | Assessment of concrete susceptibility to fire spalling: A report on the state-of-the-art in testing procedures | |
| CN103674707A (en) | System and method for measuring direct tensile strength and deformation of rock | |
| CN205246435U (en) | Experimental special chuck mechanism is suspend in creep | |
| CN105424481A (en) | Threaded fastener guarantee load testing apparatus and testing method thereof | |
| CN109883854A (en) | A kind of device and method for testing ess-strain under sample to be tested high temperature | |
| Sharma et al. | Effect of welding parameters on automated robotic arc welding process | |
| CN110333145B (en) | High-temperature bulging test device and method for miniature sample | |
| CN103868808A (en) | Simple detection method for crack growth rate of cold-drawing high-strength steel wires | |
| CN107505213B (en) | Novel small punch test device and test method thereof | |
| CN112393969B (en) | Axial surface type crack steel pipe explosion test device and fracture resistance evaluation method thereof | |
| CN113804541A (en) | Steel pipe sample for tensile test in high-pressure hydrogen environment and preparation method thereof | |
| CN204701146U (en) | The checkout gear of polyethylene pipe hot melt butt welding joint weld intensity | |
| WO2022237012A1 (en) | On-site measurement and debugging system and method for rigid hanging devices of pressure element | |
| Brodecki et al. | Monitoring of fatigue damage development in as-received and exploited 10CrMo9-10 power engineering steel supported by Digital Image Correlation | |
| CN108692834A (en) | One kind is for verifying the lower concrete stress experimental rig of internal loading effect | |
| CN108489828A (en) | A kind of concrete and soil body interface shearing experimental rig and its test method | |
| O'Donnell et al. | Instability during high strain rate compression of 2024 T351 aluminium | |
| CN211856104U (en) | Test device for simulating destruction of steel structure in fire | |
| CN207351817U (en) | A kind of device for fast detecting of construction site large bridge bracket damage | |
| CN105865936B (en) | The low-temperature bending detection method of metal material | |
| CN209784082U (en) | Visual high-temperature test device | |
| CN217359380U (en) | Synchronous testing device for concrete force, deformation, temperature and pore pressure | |
| CN212410478U (en) | Fixing frame for cable fire resistance test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |