Cement-based composite material test piece deformation test device

The utility model provides a cement-based composite material test piece deformation test device which comprises a mounting block, an upper clamping assembly and a lower clamping assembly, the upper clamping assembly comprises a detection rod inserted in the displacement hole, an upper clamping plate arranged on the detection rod, a detection cavity formed in the detection rod, a nut arranged on the detection rod and a fiber grating strain sensor arranged in the detection cavity, and the lower clamping assembly comprises a supporting rod arranged on the mounting block and a lower clamping plate arranged on the supporting rod. Through the arrangement of the detection rod, the distance between the upper clamping plate and the lower clamping plate can be changed, test pieces with different sizes and various shapes can be adapted, the detection rod can protect the fiber bragg grating strain sensor in the detection rod, the fiber bragg grating strain sensor is not prone to damage, and the influence of the environme