Changes in natural torsional frequency of horizontally-curved bridge by reinforcement

DOI

10.2991/icsmme-15.2015.6How to use a DOI?

Keywords

Evolution-Fea, Finite Element, Torsional Vibration, Natural Frequency, Curved Steel I-Girder

Abstract

Horizontally curved steel I-girder bridge (HCSIB) has low torsional resistance hence has a high risk of breakage when it vibrates. This study investigated the changes in the natural torsional frequency of an HCSIB when it is reinforced with different types of bracing members. Three-dimensional finite element numerical analysis with Evolution FEA open-source software was applied to an established model of HCSIB. The simulation results showed that the changes in the bridge’s natural torsional frequency caused by reinforcement with K, Z, and X-type cross frames were significant and almost equal to each other, and reinforcement with extra X-type cross frames caused a bigger change, but reinforcement with bottom bracings caused a much smaller change. Overall, K-type cross frames are the best choice for reinforcement because they are the most economical while providing virtually the same high torsional frequency as those provided by the other two cross frames.

Copyright

© 2015, 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/).

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TY  - CONF
AU  - N. Kunla
AU  - B. Puangkird
PY  - 2015/11
DA  - 2015/11
TI  - Changes in natural torsional frequency of horizontally-curved bridge by reinforcement
BT  - Proceedings of the 2015 International Conference on Structural, Mechanical and Material Engineering
PB  - Atlantis Press
SP  - 22
EP  - 26
SN  - 2352-5401
UR  - https://doi.org/10.2991/icsmme-15.2015.6
DO  - 10.2991/icsmme-15.2015.6
ID  - Kunla2015/11
ER  -