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Abstract

In view of the excessive transverse seismic force of medium-span cable-stayed bridges, the main bridge of Cocodala Bridge was taken as the research object to study the working mechanism of different seismic damping and isolation methods and discuss the transverse seismic stress state of the bridge tower, transition pier, and auxiliary pier under the transverse damping and isolation measures of this type of cable-stayed bridge. The analysis shows that the transverse seismic forces of the bridge tower, transition pier, and auxiliary pier can be greatly reduced when seismic damping and isolation measures are adopted. At the same time, with the gradual increase of the horizontal yield stiffness of the special-shaped steel damper, the transverse seismic forces of the bridge tower, transition pier, and auxiliary pier increase gradually, and the transverse relative displacement of the main beam decreases gradually. When the main beam is laterally limited at the bridge tower, and seismic damping and isolation measures are applied in the transition pier and auxiliary pier, the transverse seismic force at the transition pier and auxiliary pier is greatly reduced, but the transverse seismic force at the bridge tower is increased. Meanwhile, with the gradual increase in the horizontal yield stiffness of the special-shaped steel damper, the transverse seismic force at the transition pier and auxiliary pier is gradually increased. The transverse seismic force at the bridge tower decreases gradually.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.025

First Page

136

Last Page

141

Submission Date

May 2025

Reference

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