Structural safety of bridge piers considerinr flood effects | |
| Author | Thanut Kallaka |
| Call Number | AIT Thesis no.ST-11-11 |
| Subject(s) | Bridges--Flood damage Bridges--Foundation and piers |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ST-11-11 |
| Abstract | High level and high velocity flood flows are potentially harmful to bridge piers as evidence in many toppled piers. As had been observed in Taiwan's typhoon days, the single-column piers were considered as the most vulnerable. The flow characteristic parameters including drag coefficient, scouring and v01tex shedding are built into a pier-flood interaction model to investigate structural safety against hazards which is measured by excessive column bending moment and resonance in stmctural vibrations. Using the established pier in flood simulation results embedded in a neural networks code, two cases of pier toppling occurred in typhoon days were re-examined: (1) a bridge overcome by flash flood near a mountain side; (2) a bridge washed off in flood across a wide channel near the estuary. In the results, the numerical analysis shows the causes behind the failed bridges in Taiwan or any case due to piers in flood flows. These reasons are the excessive moment capacities of pier and the vibrations from vortex shedding in scouring effects. |
| Keyword | Structural safety; Bridge piers; Effects of flood; Scouring depth; Vortex shedding; Neural networks |
| Year | 2011 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ST-11-11 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Wang, Ching-Jong; Pennung Wamitchai |
| Examination Committee(s) | Chiu, Gregory L.F.; Anwar, Naveed |
| Scholarship Donor(s) | Royal Thai Government Fellowship |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2011 |