Device for creep test, system for tensile and compressive creep test and test method of the same

A system for a tensile and compressive creep test, the system comprising a box body which is sealable, wherein the box body is provided with a box door, the box body is provided with a constant temperature and humidity device, and wherein at least one device for the creep test is arranged in the box body, wherein each of the at least one device for the creep test comprises a device frame, a test piece clamp, a load loading mechanism and linear displacement sensors, wherein each of the test piece clamp, the load loading mechanism and the linear displacement sensors is arranged on the device frame, wherein:

• the test piece clamp is configured for placing a test piece for the creep test, the test piece is arranged in a middle of the test piece clamp, a first end of the test piece clamp is a fixed end, a position of the fixed end is unchanged relative to the device frame, and a second end of the test piece clamp is a movable end;
• the load loading mechanism comprises a pulley block and a load, the pulley block comprises at least one movable pulley and a plurality of fixed pulleys, the load is connected with the movable end of the test piece clamp through a steel wire rope that is wound around the pulley block, an acting force is applied to the test piece for the creep test by the load through the movable end of the test piece clamp, and the acting force acts on a same line as a central axis of the test piece;
• and
• the linear displacement sensors are configured for acquiring displacement data of the test piece during the creep test.