Device for improving transverse seismic performance of single-tower cable-stayed bridge and single-tower cable-stayed bridge

Abstract

The invention provides a device for improving the transverse seismic performance of a single-tower cable-stayed bridge. The device for improving the transverse seismic performance of the single-towercable-stayed bridge comprises a model unit, a first damping module and a second damping module, wherein the model unit comprises a model main tower of the single-tower cable-stayed bridge, a model main beam of the single-tower cable-stayed bridge and model transition piers of the single-tower cable-stayed bridge; the first damping module and the second damping module are separately arranged between the model main tower and the model main beam and between the model transition piers and the model main beam. Therefore, the suitable first damping module and the second damping module can be selected through a model of the single-tower cable-stayed bridge, so that the first damping module and the second damping module are applied to the single-tower cable-stayed bridge, the earthquake internal force response of the single-tower cable-stayed bridge can be greatly reduced, and meanwhile, displacement response can be further controlled in a reasonable range.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a device for improving the lateral seismic performance of a single-tower cable-stayed bridge and the single-tower cable-stayed bridge. Background technique [0002] The cable-stayed bridge is a long-span bridge, and its model main tower is relatively high, and the project investment is large. Once the bridge tower is damaged by nonlinearity under the earthquake, it is difficult and expensive to repair. For example, the Jilu Bridge in Taiwan, my country, was severely damaged by the earthquake in 1999. The main forms of earthquake damage are: damage to the bridge tower at the connection between the cross bridge and the tower beam, and the support connection between the auxiliary pier and the main beam connection of the model. Damage to components (supports, blocks, shear keys, etc.), and excessive relative displacement between the main bridge and the approach bridge. [0003] Long-span bridg...

AI Technical Summary

Problems solved by technology

However, the consolidating confinement system of towers, beams, piers, and beams significantly increases the overall stiffness of the bridge in the direction of the bridge, causing its fundamental frequency to be located in a frequency band with abundant seismic energy, resulting in an earthquake of the entire structure in the direction of the bridge The inertia force increases, which has a more obvious effect on the pier

If the restraint system of tower, beam, pier, and beam is freely released, the relative displacement between the main beam of the model and the tower and pier is too large, and the main beam of the model may collide with the main tower of the model

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