Concrete beam flexure testing device

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 ut