Prestressed concrete box girder structure with frequency modulation liquid damper

A frequency modulation liquid damping, concrete box girder technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems affecting structural safety, and achieve the effects of reducing temperature stress, reducing vibration frequency and amplitude, and reducing structural temperature difference

Pending Publication Date: 2020-06-26
中铁二院贵阳勘察设计研究院有限责任公司
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Problems solved by technology

[0003] In recent years, many prestressed concrete box girder structures have experienced many diseases during operation, which has affected the safety of the structure

Method used

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  • Prestressed concrete box girder structure with frequency modulation liquid damper

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] refer to figure 1 , a prestressed concrete box girder structure with a frequency modulation liquid damper of the present invention, the main body of the box girder structure is composed of a top plate 10, a bottom plate 11 and two side webs 12, and the main body of the box girder structure is arranged with the two side webs 12 A transverse diaphragm 13 consolidated into one body, which divides the internal chamber of the box girder structural body into an upper chamber and a lower chamber. The frequency modulation liquid 20 is injected into the upper chamber to form a frequency modulation liquid damper for absorbing the vibration energy of the structure, and the dynamic side force generated by the liquid in the upper chamber during the sloshing process is used to provide vibration damping effect, effectively reducing the vibration frequency and a...

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Abstract

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.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering main structures, in particular to a prestressed concrete box girder structure with a frequency modulation liquid damper. Background technique [0002] Prestressed concrete box girders are widely used in bridges and other projects, and their advantages mainly include good structural integrity, high structural rigidity, small deformation, and good seismic performance. [0003] In recent years, many prestressed concrete box girder structures have many diseases during operation, which affect the safety of the structure. The damage is mainly manifested in two aspects of cracks and deflection. Cracks are divided into load cracks, temperature cracks, shrinkage cracks and steel corrosion cracks according to external factors. Among them, the load crack is caused by the excessive tensile stress of the beam body under the action of dynamic and static load; the temperature crack is caused by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D2/04
CPCE01D2/04E01D19/00
Inventor 康力方钱宝
Owner 中铁二院贵阳勘察设计研究院有限责任公司
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