Circular loading shear apparatus for observing earth and structural member contact face mechanical property

A technology of cyclic loading and mechanical properties, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of difficult normal boundary conditions of the contact surface, not fully considering the characteristics of the contact surface, and difficult to simulate the actual mechanical behavior, etc. Achieve the effect of improving test and measurement accuracy, good effect and low cost

Inactive Publication Date: 2003-03-12
TSINGHUA UNIV
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Problems solved by technology

However, most of the existing test equipment is improved on the basis of soil static and dynamic characteristics test equipment (such as direct shear instrument, simple shear instrument, etc.), without fully considering the characteristics of the contact surface itself
For example, the normal stress is generally applied on the soil rather than directly on the contact surface itself, which causes difficulties in controlling the normal boundary conditions of the contact surface and errors in measuring the normal stress; for example, most of the existing contact surface tests It is limited to observe its shear characteristics, but ignores the non-negligible normal deformation of the contact surface and the coupling characteristics of the normal stress-strain relationship and the tangential stress-strain relationship. Therefore, it is required to

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  • Circular loading shear apparatus for observing earth and structural member contact face mechanical property
  • Circular loading shear apparatus for observing earth and structural member contact face mechanical property
  • Circular loading shear apparatus for observing earth and structural member contact face mechanical property

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Embodiment Construction

[0010] figure 1 Shown is a schematic diagram of the structure of the cyclic loading shear instrument for observing the mechanical properties of the contact surface between the soil and the structure. The shear instrument is mainly composed of a support, a soil container vehicle, a hydraulic loading and control system, a normal boundary control unit, and a data acquisition system , the soil container vehicle 14 is placed on the horizontal track 15 on the inner bottom surface of the support 1, the test soil is filled in the vehicle, the structural panel 4 is placed flat on it, and the upper wing plate 5 is snapped into the vertical tracks 13 on both sides of the support 1 Inside, a normal boundary control unit 9 and a vertical displacement sensor 10 are installed between the upper wing plate 5 and the structural panel 4, and the vertical load sensor 7 is installed on the upper wing plate 5 and the vertical hydraulic pressure sensor fixed on the support 1. The cylinder 8 is conne...

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Abstract

A cyclic loading shear tester for observing the mechanical characteristics of interface between earth and structural member is composed of the earth container carriage with organic glass window, normal boundary control unit put on structural plate on the earth, data acquisition system, and hydraulic loading and control system. Its advnatages are high test and measuring precision, and use of digital photography.

Description

technical field [0001] The invention belongs to mechanical property testing equipment, in particular to a cyclic loading shearing instrument for observing the mechanical properties of the contact surface of soil and structure, which is used for reproducing and observing the static dynamic response of the contact surface of soil and structure. Background technique [0002] The main instruments for the static and dynamic characteristics of the contact surface between soil and structure are direct shear instrument, simple shear instrument, torsional shear instrument, dynamic triaxial instrument and resonance column instrument. Among them, the direct shear and simple shear contact surface test instruments are improved on the basis of the direct shear instrument and the simple shear instrument for studying the mechanical properties of soil, and are widely used in the test and research of the mechanical properties of the contact surface. [0003] In recent years, a batch of equipm...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N3/10
Inventor 张建民张嗄
Owner TSINGHUA UNIV
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