Stochastic Seismic Response of Super Long-Span Suspension Bridges under Long Period Ground Motions

DOI

10.2991/iccte-17.2017.68How to use a DOI?

Keywords

Super-long-span suspension bridge; Long-period ground motions; Travelling wave effect; Power spectrum densities

Abstract

Long span suspension bridge has a long period of vibration, which is very sensitive to long period ground motion, so it is very important to analyze the seismic response under the long period ground motion. Taking a super long span suspension bridge as the research object, three-dimensional finite element model is established. Based on the power spectrum of long period ground motion and general ground motion, combined with the designed power spectrum, the stochastic seismic response of the suspension bridge is carried out, and the traveling wave effect of suspension bridge under long period earthquake is studied. The results show that the response power spectrum of the displacement and internal force of the suspension bridge under the long period ground motion is the maximum, and the response power spectrums under the general and designed ground motion power spectrum are very close. The seismic response of suspension bridge is reduced after the traveling wave effect is considered. The maximum mean of displacement and bending moment when the apparent velocity is 200m/s is about 10% lower than that of the uniform excitation.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

Download article (PDF)

TY  - CONF
AU  - Kun Yan
AU  - Jiajian Zhu
AU  - Lixin Wang
PY  - 2017/07
DA  - 2017/07
TI  - Stochastic Seismic Response of Super Long-Span Suspension Bridges under Long Period Ground Motions
BT  - Proceedings of the 2017 2nd International Conference on Civil, Transportation and Environmental Engineering (ICCTE 2017)
PB  - Atlantis Press
SP  - 389
EP  - 395
SN  - 2352-5401
UR  - https://doi.org/10.2991/iccte-17.2017.68
DO  - 10.2991/iccte-17.2017.68
ID  - Yan2017/07
ER  -