| Title |
Free Vibration Analysis based on HSDT of Laminated Composite Plate Structures Using Multi-scale Approach |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.1.0061 |
| Keywords |
멀티-스케일 접근 방법;고차항 판이론;고유진동;유한요소 해석 Multi-scale approach;Higher-order plate theory;Free vibration;Finite element analysis |
| Abstract |
This is the second of two companion papers that describe the performance assessment for flexible rockfall protection systems. Described in a companion paper is the criteria to assess the performance of flexible rockfall protection systems. In this study the performance assessment of domestic rockfall protection fences was implemented using the criteria suggested in the companion paper. It was investigated that the rockfall protection fences for express highways performed well to resist the rockfall energy of 50kJ and the deformed rockfall protection fences right after impacting would not obstruct the vehicle traffic. However, to dissipate the rockfall energy of 50kJ with the level of European standards constantly, the spacing of wireropes was adjusted to be 200mm up to the 8th wirerope from the bottom and spacing-maintainers should be extended to the 8th wirerope. It was figured out that the rockfall protection fences for general highways were required to install spacing-maintainers as those for express highways because they, which did not have spacing-maintenance members, were very prone to the penetration of rockfall even for the very small rockfall impact energies. |