Prestressed concrete box girder structure with frequency modulation liquid damper

A prestressed concrete box girder structure with a frequency modulation liquid damper aims to effectively reduce vibration frequency and amplitude, reduce dynamic load and structural temperature difference borne by the structure, enhance use performance of the box girder structure, reduce later maintenance cost and reduce safety risks caused by cracks. The main body of the girder structure is composed of a top plate, a bottom plate and two side webs. A transverse partition plate fixedly connected with the two side webs into a whole is arranged in the box girder structure main body and dividesan inner cavity of the box girder structure main body into an upper cavity and a lower cavity. A frequency modulation liquid is injected into the upper cavity to form a frequency modulation liquid damper used for absorbing structural vibration energy. A sealing bag is arranged in the lower cavity, and the sealing bag filled with high-pressure gas acts on the inner wall of the lower cavity. 一种带调频液体阻尼器的预应力混凝土箱梁结构，以有效降低振动频率及