Device for testing relationship between torque and pre-tightening force of large-diameter screw

The utility model relates to the field of prestress construction. The utility model relates to a device, in particular to a device for testing the relation between large-diameter screw torque and pre-tightening force. Different torques are applied through a torque wrench; strain value changes of the strain gauges are recorded, the linear relation between the torque and the strain values is analyzed, then the relation between the torque and the pre-tightening force is calculated, the steel support is used for anchoring the screw, the strain gauges are used for testing the strain changes of thescrew under different torques, and the precision of testing the relation between the torque of the screw and the pre-tightening force is improved by using the device. 本实用新型涉及预应力施工领域，具体涉及一种用于测试大直径螺杆扭矩与预紧力关系的装置，通过扭矩扳手施加不同的扭矩，记录应变片应变值变化，分析扭矩与应变值的线性关系，进而推算出扭矩与预紧力的关系，钢支架是为了锚固螺杆，应变片是为了测试螺杆在不同扭矩下的应变变化，使用该装置提高了测试螺杆扭矩与预紧力关系的精度。