4.5 Article

Seismic control of a long-span triple-tower suspension bridge using hysteretic steel damper

Journal

Publisher

TAYLOR & FRANCIS LTD
DOI: 10.1080/15732479.2023.2271891

Keywords

Hysteretic damper; relative displacement; seismic analysis; seismic control; shear force; travelling wave effect; triple-tower suspension bridge

Ask authors/readers for more resources

This paper presents a parametric study on the structural seismic control of a long-span triple-tower suspension bridge using hysteretic steel dampers. The results show that the travelling wave effect greatly affects seismic responses, and increasing the damper elastic stiffness can effectively reduce the relative displacement between the towers and the main girder, with different effects on different ranges of towers.
The seismic performance of a long-span triple-tower suspension bridge is a critical consideration in engineering communities. To promote a better seismic design, this paper presents a parametric study on the structural seismic control using hysteretic steel dampers. The finite element model is firstly established, and an introduction to the mechanical properties of the E-shaped hysteretic steel damper is made. Then, a seismic analysis is conducted under uniform earthquake excitations. Considering the effect of wave passage, the performance of hysteretic steel dampers in seismic control is further analyzed. The results indicate that the travelling wave effect greatly affects seismic responses. Increasing the damper elastic stiffness can effectively reduce the relative displacement between the main girder and either the left or the central tower. This treatment is effective for the right tower only when the wave velocity is among 400-1600 m/s, while it makes little contribution in other ranges. At an arbitrary wave velocity, increasing the damper elastic stiffness would cause minor changes to the shear forces of side towers, while its influence on the central tower is significant. A reasonable damper design for the long-span triple-tower suspension bridge depends on an essential prior evaluation of the wave velocity based on soil conditions.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.5
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available