The Indian River Inlet cable stayed bridge: the effect of wind speed and direction on estimates of stay cable forces
| Author(s) | Obayes, Shaymaa Khudhair | |
| Date Accessioned | 2018-03-15T12:12:25Z | |
| Date Available | 2018-03-15T12:12:25Z | |
| Publication Date | 2017 | |
| SWORD Update | 2017-11-10T17:19:49Z | |
| Abstract | The objective of this study is to estimate the tension in the stay cables of the Indian River Inlet bridge using measured cables vibrations in conjunction with dynamic cable theory. In addition, to evaluate the effect of the wind speed and direction on the ability to estimate the stay cable forces. A MATLAB script is developed to automate the data processing, using spectral density techniques to identify the cable natural frequencies and from these, estimate the tension. Making use of taut cable theory, which combines frequencies and tension force in a relationship, one can be extracted by relying on the other. The acceleration data that is considered for analysis purpose in this study is from two wind events: Winter Storm Jonas January, 23rd 2016, and Hurricane Matthew October, 9th 2016. The results show that the taut string theory is an accurate and straightforward method to estimate cable force by knowing the natural frequency of the cable. From the analysis work, it is seen that all the estimated tensions were approximately within the ultimate maximum and minimum ranges from the construction requirements with different percentages of no more than 15%. For average or gust wind speeds between 25 mph and 55 mph, the tension in the stay cables can be estimated without requirement for certain characteristics using taut cable theory. In addition, the directions from north or north east for the wind data provide acceptable data for estimating the tension in the stay cables. moreover, there is not enough information to determine the validity of other directions to estimate tension for cables. | en_US |
| Advisor | Shenton, Harry W., III | |
| Degree | M.C.E. | |
| Department | University of Delaware, Department of Civil and Environmental Engineering | |
| Unique Identifier | 1028731330 | |
| URL | http://udspace.udel.edu/handle/19716/23089 | |
| Language | en | |
| Publisher | University of Delaware | en_US |
| URI | https://search.proquest.com/docview/2001239536?accountid=10457 | |
| Keywords | Applied sciences | en_US |
| Keywords | Acceleration data | en_US |
| Keywords | Cable natural frequencies | en_US |
| Keywords | Dynamic cable theory | en_US |
| Keywords | Stay cables | en_US |
| Keywords | Tension | en_US |
| Keywords | Wind speed | en_US |
| Title | The Indian River Inlet cable stayed bridge: the effect of wind speed and direction on estimates of stay cable forces | en_US |
| Type | Thesis | en_US |