Prefabricated tie bar with anchoring device and open-web dense rib floor system

The prefabricated tie bar with the anchoring devices and the open-web dense rib floor system comprise a bar body, a plurality of longitudinal steel bars are arranged in the bar body, the longitudinal steel bars are parallel to one another, the two ends of each longitudinal steel bar are located outside the bar body, and the anchoring devices are further arranged at the two ends of each longitudinal steel bar. The tie bar adopts the prefabricated part, the phenomenon of grout overflow during concrete pouring of the U-shaped steel-concrete combined lower chord is effectively avoided, after the lower chord and the tie bar tower are built, the construction of the lower chord and the tie bar tower can be completed as long as pouring of the lower chord is completed, and therefore the construction speed is greatly increased; the tie bar is matched with the concrete through the longitudinal steel bars, so that the strength of the tie bar is improved, and the bearing capacity is better; the U-shaped steel plates are c