Semi-grouting type steel bar connecting joint with built-in force transducer

A semi-grouting type steel bar connector with a built-in force measuring sensor comprises a semi-grouting sleeve, the force measuring sensor, a sleeve grouting material, an end cover and ribbed steelbars I and II to be connected. The force measuring sensor is composed of a base provided with a piezoelectric element, an upper cover, a lower cover and a sensor lead, the force measuring sensor is installed in a semi-grouting sleeve through connection of the base and an internal thread of a polygonal cylinder, the lower cover of the force measuring sensor is flush with the top of a cylindrical inner cavity of the cylinder, and the sensor lead is led out from a grout outlet and connected with an external data collecting device. A ribbed steel bar I with an external thread at the end part is connected with the internal thread of the polygonal cylinder and props against the upper cover of the force transducer; and the other ribbed steel bar II penetrates through the end cover and is insertedinto the inner cavity of