Wind-resistant device for improving construction stability of cantilever of cable-stayed bridge and construction method

Abstract

The invention discloses a wind-resistant device for improving the construction stability of a cantilever of a cable-stayed bridge, which comprises a rope and a damping device, the upper end of the rope is connected with a hanging basket, the lower end of the rope is connected with the damping device, and the damping device is suspended in water by virtue of the buoyancy of the damping device and the tensile force provided by the rope; when wind-induced vibration of a beam body of the cable-stayed bridge occurs, the hanging basket installed on the beam body drives the damping device to move in water through the rope, the damping device is subjected to resistance of water in water, the direction of the resistance is opposite to the moving direction of the damping device, the damping device reciprocates up and down to overcome the resistance of the water to do work, and therefore vibration energy of the beam body is dissipated. And the beam body is recovered from the motion state to the static state. The wind-resistant device of the cable-stayed bridge increases structural damping, timely dissipates energy generated by structural vibration, eliminates vibration of the cable-stayed bridge in a germination stage, and ensures stability and safety in a bridge construction process. Meanwhile, the invention further provides an efficient and rapid construction method.

Description

technical field [0001] The invention belongs to the technical field of cable-stayed bridges, and in particular relates to a wind-resistant device and a construction method for increasing the construction stability of a cantilever of a cable-stayed bridge. Background technique [0002] Cable-stayed bridges have a wide selection of structural systems, outstanding mechanical characteristics and aesthetic effects. Among long-span bridges, cable-stayed bridges have become the main bridge type. With the increase of the span of the cable-stayed bridge, the rigidity and stability of the structure decrease, and at the same time, the construction period of the bridge is lengthened. Long-span cable-stayed bridges generally adopt cantilever construction. Before the main girder is closed, the cable-stayed bridge in the cantilever state has weak structural stiffness, large wind-induced vibration response, and poor stability. Therefore, for long-span bridges, it is of great practical eng...

AI Technical Summary

Problems solved by technology

The use of pier side brackets or wind-resistant temporary piers is not only complicated in construction, high in cost, but also difficult to implement in water

Application number "201210080686.0" Lv Invention Patent "Large-span bridge self-balancing wind resistance device", this device can convert the external force of lateral wind load into tower-beam. During the long construction period, the excitation effect of the load on the structure changes greatly, and the applicability of this scheme needs to be improved.

Images