A test device and method for testing concrete tensile creep

A test device, concrete technology, applied in the direction of measuring device, using stable tension/pressure test material strength, instruments, etc., can solve problems such as stress concentration, and achieve the effect of large amplification factor, simple device processing, and large range

Inactive Publication Date: 2018-03-02
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At the same time, there are major difficulties in the design of direct tensile strength tests on concrete, problems related to stress concentrations during loading, and possible secondary bending an

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  • A test device and method for testing concrete tensile creep
  • A test device and method for testing concrete tensile creep

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0020] Such as Figure 1 to Figure 2 As shown, a test device for measuring the tensile creep of concrete includes a fixed steel frame 9, a door-type connector 10 and a dead-load lever arm, and the fixed steel frame 9 and the door-type connector 10 are connected to the specimen through a connecting component , the door-type connector 10 is connected to the dead-load lever arm 12 by reinforcing the fixing bolt 15, the side of the fixed steel frame 9 is connected to the vertical wall by connecting the steel plate 1 and the fixing bolt 2, and the bottom of the fixed steel frame 9 is connected by connecting the steel plate 1 and the ground The foot bolt 7 is connected with the ground, the constant l...

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Abstract

A test device for testing concrete tensile creep is disclosed. The device includes a fixed steel rack, a door type connector and a dead-load lever arm. Test pieces are connected between the fixed steel rack and the door type connector through connecting assemblies. The door type connector and the dead-load lever arm are connected through a strengthening fixing bolt. The side surface of the fixed steel rack is connected to a vertical wall through a connecting steel plate and fixing bolts. The bottom of the fixed steel rack is connected to the ground through a connecting steel plate and foundation bolts. The dead-load lever arm is connected to the fixed steel rack through a strengthening connecting steel plate and a strengthening fixing bolt. The dead-load lever arm is connected to a loadingapparatus. Compared with traditional creep devices, the device and a test method for testing concrete tensile creep can measure creep of three test pieces simultaneously, the device overcomes an eccentric axial pulling problem of test pieces through cooperation of lifting rings and shackles, and the device is simple to machine, large in amplification coefficient and large in loading force range.

Description

technical field [0001] The invention relates to the field of concrete structures and materials, and relates to a method for measuring tensile creep of concrete. Background technique [0002] Creep is an inherent mechanical property of concrete, and the tensile creep generated by the internal tensile stress of concrete is an important cause of early cracking of concrete structures. However, since concrete is a brittle material, the tensile creep deformation is small. At the same time, there are major difficulties in the design of direct tensile strength tests on concrete, problems related to stress concentrations during loading, and possible secondary bending and torsion induced in concrete specimens by end clamping, so There are few researches on the tensile creep of concrete at home and abroad, and the tensile creep is usually equated with the compressive creep. But for some larger flat plate structures, the internal tensile stress determines whether the specimen reaches ...

Claims

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Application Information

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IPC IPC(8): G01N3/14G01N3/06
CPCG01N3/14G01N3/062G01N2203/0017G01N2203/0033G01N2203/0605
Inventor 石丹丹沈楠刘赛赛陈徐东
Owner HOHAI UNIV
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