Changes in natural torsional frequency of horizontally-curved bridge by reinforcement
N. Kunla, B. Puangkird
Available Online November 2015.
- https://doi.org/10.2991/icsmme-15.2015.6How to use a DOI?
- Evolution-Fea, Finite Element, Torsional Vibration, Natural Frequency, Curved Steel I-Girder
- 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.
- Open Access
- This is an open access article distributed under the CC BY-NC license.
Cite this article
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 - 2015 International Conference on Structural, Mechanical and Material Engineering PB - Atlantis Press SN - 2352-5401 UR - https://doi.org/10.2991/icsmme-15.2015.6 DO - https://doi.org/10.2991/icsmme-15.2015.6 ID - Kunla2015/11 ER -