Test device and method for axial full restraint stress

A fully restrained, test device technology, applied in the direction of measuring devices, material inspection products, instruments, etc., can solve the problems of poor sensitivity, long test cycle, small constraints, etc., to achieve increased anchoring performance, strong adjustability, and easy maintenance Effect

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A fully restrained, test device technology, applied in the direction of measuring devices, material inspection products, instruments, etc., can solve the problems of poor sensitivity, long test cycle, small constraints, etc., to achieve increased anchoring performance, strong adjustability, and easy maintenance Effect

CN106501497AInactive Publication Date: 2017-03-15HOHAI UNIV

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[0025] Below in conjunction with accompanying drawing, the present invention will be further described:

[0026] A test device for axially fully constrained stress includes a constrained frame, a high-precision displacement sensing system, a polytetrafluoroethylene plate 5, a load sensor 9, an actuator 10, a computer 12, an environmental chamber 13 and a constrained specimen 1. The constraining frame is composed of specimen template 2, bolts 3, bottom plate 4 and spherical hinge 11. The high-precision displacement sensing system is composed of a displacement sensor 8 , an embedded part 6 and a transmission wire 7 . The sample template 2 and the bottom plate 3 are connected together by bolts 3, and the sample template 2 is fixed on the horizontal frame.

[0027] Such as figure 1 As shown, one end of the constraint specimen 1 is fixed, the other end can move freely, and the polytetrafluoroethylene plate 5 can be freely stretched. The embedded parts 6 are inserted into both en...

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Abstract

The invention discloses a test device and method for axial full restraint stress. The test device for axial full restraint stress comprises a restraint frame, a displacement sensing system, a restraint test piece, a load sensor, an actuator and an environmental cabinet. The restraint frame, the displacement sensing system, the restraint test piece, the load sensor and the actuator are all located in the environmental cabinet, the restraint frame is composed of a test piece template, a base plate and a spherical hinge, the test piece template comprises a fixed template and a moving template, the fixed template is fixed on the base plate, the actuator is fixed on the base plate, an execution end of the actuator is connected to the moving template through the load sensor, and the spherical hinge is arranged on the end of the moving template. Compared with the prior art, the test device for the axial full restraint stress is simple in structure, high in test precision and simple in test method. The device can achieve a 100% restraining degree of a test piece, and can control the temperature of a test piece through the environmental cabinet. The device is applicable to measurement of early phase restraint stress of concrete in a scientific research and construction site, and has a wide market application prospect.

Description

technical field [0001] The invention designs a test device and a test method for axially fully constrained stress, belonging to the field of concrete construction. Background technique [0002] With the application of high-strength concrete more and more widely, the water-cement ratio of concrete is getting lower and lower, which leads to the cracking phenomenon of high-strength concrete in the early age of the constraint state is more and more serious, and the evaluation of the early age of concrete under the constraint condition An essential parameter for the risk of cracking is the restraint stress, but the existing devices for measuring the restraint stress at the early age of concrete still have shortcomings such as insufficient accuracy and complicated steps. [0003] At present, the commonly used test methods are mainly the plate method, the ring method and the uniaxial constraint method. Among them, the ring method is widely used because of its simple device and the...

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Application Information

Patent Timeline

15 Mar 2017

Publication

CN106501497A

IPC: G01N33/38

CPC: G01N33/383

Inventors: 沈德建; 王文婷