Soil beam bending test device

Abstract

The invention discloses a concrete beam flexure testing device. The concrete beam flexure testing device comprises four steel rods, a first steel plate, a second steel plate, a third steel plate, a servo controller, a motor, a planetary reducer, a ball screw lifter, a force sensor, a first displacement sensor, a second displacement sensor, a third displacement sensor, a fourth displacement sensor, a static data acquisition instrument, a first support, a second support, an organic glass panel and a high-definition camera; the concrete beam flexure testing device can be used for performing three-point beam bending testing and four-point beam bending testing; a displacement control loading mode is adopted to achieve stable and controllable speed rate with large choosing range, and the softening character of the concrete beam can be captured; the data acquisition system adopts the force sensor and the displacement sensors to achieve high data measurement precision, and the static data acquisition instrument is utilized to acquire data, so that the concrete beam cracking process can be completely recorded; the high-definition camera is adopted to record the concrete beam crack growth process, accurately observe the strain localization phenomenon and obtain cracking strain.

Description

technical field [0001] The invention belongs to the technical field of mechanical property testing, in particular to a soil beam bending test device. Background technique [0002] Tensile cracks widely exist in cohesive soil layers, such as deformation cracks in clay barriers and clay core walls of earth-rock dams, tension-type ground cracks in loess areas, tensile cracks in soil slopes and foundation pit slope tops, etc. The presence of cracks significantly reduces the impermeability and strength properties of the clay layer. Therefore, it is necessary to study the tensile cracking characteristics of cohesive soil layer from the experimental point of view. [0003] However, the testing equipment for soil tensile properties currently developed at home and abroad has the following problems: there are many unit test equipment, and there are few model test equipment; traditional test equipment generally uses stress-controlled loading, which cannot capture the softening charact...

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Problems solved by technology

[0003] However, the testing equipment for soil tensile properties currently developed at home and abroad has the following problems: there are many unit test equipment, and there are few model test equipment; traditional test equipment generally uses stress-controlled loading, which cannot capture the softening characteristics of the soil ;The collection method of test data is simple, and the accuracy is poor; the function is single

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