Buy article PDF
The purchased file will be sent to you
via email after the payment is completed.
US$ 35
|
Structural Engineering and Mechanics Volume 73, Number 4, February25 2020 , pages 447-454 DOI: https://doi.org/10.12989/sem.2020.73.4.447 |
|
|
|
Seismic performance and design of bridge piers with rocking isolation |
||
Xingchong Chen, Xiushen Xia, Xiyin Zhang and Jianqiang Gao
|
||
| Abstract | ||
| Seismic isolation technology has a wide application to protect bridges from earthquake damage, a new designed bridge pier with seismic isolation are provided for railways in seismic regions of China. The pier with rocking isolation is a self-centering system under small and moderate earthquakes, and the unbonded prestressed tendons are used to prevent overturning under strong earthquakes. A numerical model based on pseudo-static testing results is presented to evaluate the seismic performance of isolation bridge piers, and is validated by the shaking table test. It is found that the rocking response and the loss of prestressing for the bridge pier increase with the increase of earthquake intensity. Besides, the intensity and spectral characteristics of input ground motion have great influence on displacement of the top and bottom of the bridge pier, while have less influence on the bending moment of the pier bottom. Experimental and numerical results show that the rocking-isolated piers presented in this study have good seismic performance, and it provides an alternative way for the railway bridge in the regions with high occurrence of earthquakes. Therefore, we provide the detailed procedures for seismic design of the rocking-isolated bridge pier, and a case study of the seismic isolation design with rocking piers is carried out to popularize the seismic isolation methods. | ||
| Key Words | ||
| railway bridges; seismic isolation with rocking pier; prestressed tendon; shaking table test; numerical simulation; seismic performance and design | ||
| Address | ||
| School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China | ||