Hydraulic concrete member fracturing simulation experiment design method and device capable of applying biaxial acting force

Abstract

The invention provides a hydraulic concrete member fracturing simulation experiment design method capable of applying biaxial acting force. The method comprises the steps of manufacturing a member for applying water pressure, fixing the member together with a square concrete die, pouring concrete into the die, performing vibration and maintenance, then detaching the die while remaining the member for applying water pressure in the concrete, forming a slit in a concrete test piece, and supplying a channel for applying water pressure to the slit. A biaxial experiment machine applies the set biaxial acting force to the concrete test piece; the member for applying water pressure is used for applying the water pressure to the concrete test piece until the test piece is fractured, and the water pressure applied when the test piece is fractured is recorded. The invention also provides a device used in the method. The method and the device used in the method are simple; the prepared concrete test piece can meet an experiment requirement and can be used for researching hydraulic fracturing of the concrete member in a biaxial stress state.

Description

technical field [0001] The invention belongs to the technical field of simulation experiments of wading concrete buildings, and provides a method for simulating crack expansion when hydraulic pressure acts in concrete cracks, and the method can apply biaxial force on concrete components. It is suitable for studying the mechanism and law of crack expansion in wading concrete structures under the complex biaxial stress state, and can also be used to explore ways to reduce this expansion. The present invention also provides devices used in said experimental methods. Background technique [0002] Concrete is an important building material, and most of the national infrastructure construction is made of concrete buildings. However, concrete has a characteristic that it is prone to cracks. Although concrete with cracks can still work normally in general buildings, cracks in wading concrete buildings will be filled with water pressure. If the cracks expand under the action of wate...

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Problems solved by technology

However, these experimental methods can only simulate the problem of cracks splitting under the action of pressure water when the specimen is not subjected to pre-applied force or only pre-applied uniaxial force, and cannot simulate when the specimen is subjected to biaxial pre-applied force. , the problem of hydraulic fracturing of fractures

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