Vibration control device for vibration excitation under wind wave and current coupling effect in whole process of sea-crossing bridge construction

Abstract

The invention discloses a vibration control device for vibration excitation under the wind wave flow coupling effect in the whole process of sea-crossing bridge construction. The device comprises a mass block, dampers, springs, elastic rods, rolling shafts, supports, sliding ways and a box body, wherein the mass block moves in the direction perpendicular to the axis of the rolling shaft under the joint restraint action of the elastic rod, the damper, the spring and the rolling shaft; one end of the elastic rod is fixed on the box body, the other end is connected with the mass block, the middle part is fixed and restrained by the support, and the restrained position of the support to the elastic rod is intelligently adjustable. According to the vibration control device, the boundary constraint condition of the elastic rod is changed by adjusting the position of the support on the slide way, then the movement rigidity of the mass block is changed, and the vibration control device with the variable rigidity is convenient, rapid and continuously adjustable. Therefore, varying stiffness requirement of the vibration control device under the wind wave flow coupling effect due to the continuous change of the structure state in the whole construction process of the sea-crossing bridge is met, and the vibration response of the sea-crossing bridge in different construction states is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of disaster prevention and reduction in bridge engineering, in particular to a vibration control device for excitation by wind, wave and current coupling in the whole process of cross-sea bridge construction. Background technique [0002] With the development of the economy, the construction of bridges has developed from crossing rivers inland to crossing bays and even straits along the coast. Since the 21st century, my country has successively built sea-crossing bridges such as the East China Sea Bridge, Hangzhou Bay Bridge, Qingdao Bay Bridge, and Hong Kong-Zhuhai-Macao Bridge. At present, the Shenzhen-China Channel project is under construction, and the giant cross-sea channel project across the Qiongzhou Strait and the Bohai Strait is being planned and studied. Internationally, countries around the world are also speeding up the planning and research of large-scale cross-sea transportation projects that...

AI Technical Summary

Problems solved by technology

Furthermore, the optimal stiffness and damping parameters of the tuned mass damper corresponding to different construction states are also different. If a conventional tuned mass damper is used, multiple sets of tuned mass dampers with different parameters need to be prepared for different construction states , which is obviously difficult to apply in practical engineering

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