Tensile test piece, tensile test device and tensile test method
A technique for tensile testing and test pieces, applied in the direction of measuring devices, applying stable tension/pressure to test material strength, instruments, etc., can solve problems such as long length of steel bars, susceptibility to uneven heating, inaccurate tensile test results, etc. , to achieve the effect of uniform temperature
Active Publication Date: 2019-10-11
HENAN INST OF ENG +2
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Problems solved by technology
[0005] The purpose of the present invention is to provide a tensile test piece to solve the problem in the prior art that the length of the steel bar is relatively long, and it is easy to be unevenly heated during heating, resulting in inaccurate tensile test results; the purpose of the present invention is also to provide a Tensile test apparatus and tensile test method using the same
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[0024] An example of a tensile test apparatus such as Figure 1~3 Shown: including heating device, tensile testing machine, tensile test piece 17 and large deformation extensometer 7. The tensile testing machine is a conventional tensile testing machine for steel bars, which includes a base 14, on which four columns 2 are arranged, and a beam 1 that can move up and down is equipped with a guiding movement on the column 2. The loading head connected with the reinforcing bar, in the present embodiment, the loading head on the beam is called the upper loading head 3, and the loading head on the base is called the lower loading head 13, wherein the lower loading head is driven by the loading mechanism, in the present embodiment The loading mechanism is a vertically arranged loading cylinder. The upper loading head and the lower loading head belong to the prior art, and their structures will not be described in detail here.
[0025] The heating device includes a heating furnace su...
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The invention relates to a tensile test piece, a tensile test device and a tensile test method. The tensile test device comprises a heating device, a tensile test machine and the tensile test piece. The tensile test machine comprises loading heads which can carry out relative movement and contrary movement. The tensile test piece comprises a test piece body. Two ends of the test piece body are connection sections which are used for being connected with the loading heads of the tensile test machine. A middle part of the test piece body is equipped with a temperature rising section which is usedfor being heated by the heating device. A heat isolation layer is fixed at a periphery between the temperature rising section and each connection section on the test piece body. According to the tensile test piece, the tensile test device and the tensile test method, the problem that in the prior art, a tensile test result is inaccurate due to the fact that a steel bar is relatively long, and when the steel bar is heated, the steel bar is heated nonuniformly is solved.
Description
technical field [0001] The invention relates to a tensile test piece, a tensile test device and a test method for simulating the influence of a fire high temperature environment on a steel bar tensile test. Background technique [0002] With the rapid development of society, the urban population is becoming more and more dense, the number of high-rise buildings is increasing rapidly, and the use of gas and electrical appliances is becoming more and more extensive. The possibility of building fires is gradually increasing, and the difficulty of controlling the spread of fire is also increasing. The problem of fire is becoming more and more prominent. [0003] The fire produces a high-temperature environment. The vapor pressure in the internal pores of the concrete in the high-temperature environment can easily cause high-temperature bursting, which will cause the protective layer of the reinforced concrete structure to fall off, and the steel bars will be directly exposed to ...
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IPC IPC(8): G01N3/18G01N3/02
CPCG01N3/18G01N3/02G01N2203/0226G01N2203/0682G01N2203/0017G01N2203/0262
Inventor 赵亮平王雨秦道天杨欣宋华锋朱峰高丹盈陈刚袁健松法冠喆王聪
Owner HENAN INST OF ENG