Deflection and strain measuring device for bending test of concrete beam

The utility model provides a concrete beam bending test deflection and strain measuring device, which belongs to the technical field of concrete beam detection devices and comprises a base, two groups of fixing frames, displacement meter fixing rods, a telescopic connecting frame, a loading head and an L-shaped plate, a support component is arranged on the upper surface of the base, the fixing frames are arranged at two ends of a concrete beam, and the L-shaped plate is arranged on the upper surface of the base. The two ends of the displacement meter fixing rod are movably connected with the fixing frame, the two ends of the telescopic connecting frame are movably connected with the fixing frame, the middle of the telescopic connecting frame and a concrete beam are located at different heights, and the displacement meter fixing rod and the telescopic connecting frame are located on the two sides of the fixing frame respectively. And the L-shaped plate is fixed on the surface of the concrete beam. According to