Cable-stayed bridge system in construction stage

Abstract

The invention discloses a cable-stayed bridge system in a construction stage. The cable-stayed bridge system in the construction stage comprises a bearing platform, a bridge tower and a stiffening beam, wherein the bridge tower is vertically fixed to the bearing platform, a plurality of connecting joints are transversely arranged on the stiffening beam, a plurality of connecting joints are longitudinally arranged on the bridge tower, the connecting joints on the stiffening beam and the corresponding connecting joints on the bridge tower are connected through stayed cables, and open type underwater damping devices are hung at the two ends of the stiffening beam respectively, and are hung in water. The cable-stayed bridge system in the construction stage has the good wind resistance effect and the good damping effect.

Description

technical field [0001] The invention belongs to the field of bridge design, and in particular relates to a cable-stayed bridge system in the construction stage. Background technique [0002] During the construction of cable-stayed bridges, the main girder is often constructed by the cantilever assembly method. Before the main girder is closed, due to the influence of structural factors such as cable-stayed cables, side-span auxiliary piers, and construction temporary piers, adverse wind vibrations often occur. This phenomenon has also been confirmed in wind tunnel tests. Therefore, the wind-induced vibration response during the construction phase of the cable-stayed bridge cannot be ignored. [0003] At present, the wind-induced vibration control methods for the largest double cantilever construction stage of cable-stayed bridges mainly use TMD, MTMD and temporary buttress methods. [0004] Tuned Mass Damper (TMD) is effective in controlling the wind-induced response of st...

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Problems solved by technology

[0006] In addition, the cantilever construction of long-span cable-stayed bridges often uses temporary wind-resistant piers, including: pier foundation, on which there are at least 5 vertical steel pipe columns, and a distribution beam is connected to the upper end of the steel pipe columns. It is characterized in that: two hinge supports are symmetrically arranged on the distribution beam, and the sliding plate at the upper end of the hinge support is connected with the cantilevered main beam through an anchor rod; there are also a plurality of cable wind ropes at the upper end of the steel pipe column, and the above-mentioned anti-corrosion Although wind measures can achieve a certain vibration suppression effect, their cost is relatively expensive and the construction process is relatively complicated.

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