Test method and test device of confining pressure in steel tube concrete

A technology of concrete filled steel tube and restraint pressure, applied in the direction of measuring device, measuring force, instrument, etc.

Inactive Publication Date: 2010-11-10
WUHAN MUNICIPAL ENG DESIGN & RES INST +1
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Problems solved by technology

Using a small waterproof manometer to measure the restraint pressure, there is no report yet

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  • Test method and test device of confining pressure in steel tube concrete
  • Test method and test device of confining pressure in steel tube concrete

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Embodiment Construction

[0011] A test method for the restraint pressure in the concrete-filled steel pipe structure test. Before the concrete is poured, a small waterproof pressure gauge is fixed on the inner wall of the steel pipe with an adhesive, and then the concrete is poured. When the concrete-filled steel pipe structure is under load, the lateral deformation of the core concrete will be The corresponding deformation of the pressure sheet is caused, and the deformation strain is collected by the data acquisition system, and the pressure calibration is applied to convert it into a corresponding pressure value, which is the restraining pressure of the steel pipe on the core concrete.

[0012] A test device for realizing the above method, which is composed of a small waterproof pressure gauge and a data acquisition system 1. Among them, the data acquisition system 1 may adopt a general strain acquisition system for structural tests.

[0013] The embodiment of the small waterproof pressure gauge of...

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Abstract

The invention relates to a test method and a test device of confining pressure in steel tube concrete. The test method of the confining pressure of a steel tube to core concrete is characterized in that a miniature waterproof pressure gauge is fixedly arranged on the inner wall of the steel tube, and the core concrete transversely deforms under a loading action and generates corresponding deformation strain through a pressure slice arranged on the miniature waterproof pressure gauge to directly obtain the confining pressure thereof. The test device thereof comprises an outer circle steel ring, the pressure slice, a resistance strain gauge, a data line, a waterproof sealing layer and a data collection system, wherein the pressure slice, the back of which carries the resistance stain gauge, is arranged at one side of a groove of the outer circle steel ring, wrapped completely for waterproofing and sealing and connected to the data collection system through the data line. A test result thereof is intuitive and accurate, and the test device has the advantages of simpleness, convenience and low cost.

Description

technical field [0001] The invention relates to a test method and a test device for the restraint pressure of steel tubes on core concrete in a steel tube concrete structure. Background technique [0002] When studying the load-bearing mechanical properties of concrete-filled steel tube structures, the confinement pressure of steel tubes on core concrete is an important parameter, and its testing is a difficult problem in structural tests, which has not been well resolved. Researchers have used the hydraulic comparison test method to test the confinement pressure of steel pipes on the core concrete. However, the hydraulic comparison method is an indirect analogy method. The test is cumbersome, the readings are not intuitive enough, and the results are not accurate. Therefore, there is a need for a constraint pressure measurement method with convenient measurement and intuitive and accurate reading. There is no report on the measurement of the restraint pressure using a smal...

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Application Information

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IPC IPC(8): G01L1/00G01L1/22
Inventor 卢方伟胡湘晖
Owner WUHAN MUNICIPAL ENG DESIGN & RES INST
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