Seismic Performance Evaluation of Bridges
| Autor: | Tai-chun Huang, 黃泰鈞 |
|---|---|
| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 A procedure is to exam the seismic ability of bridges for the present study. Because of being located at the circum-Pacific seismic belt, earthquakes occur frequently in Taiwan. Therefore, the seismic design of structures has become a very important work. The bridge structure, a kind of the structures, is the lifeblood of transportation, especially plays an important role for the transporting of people and goods while getting the disaster of the earthquake. In the modern seismic design of structures, the performance-based design has become an important concept of design. This method is based on the structural properties of pre-set goal for achieving the goal of seismic design and maintaining their original function. The objective of the present study is to examine the seismic capacity of the bridge structure. For a regional point of view, it will use a non-linear static method for the pushover analysis to get a simulation of the seismic capacity of the modeling bridge pier and the bridges derived from it. Besides, it will design the ground acceleration according to "The seismic code of highway bridges" promulgated by the Ministry of Communications. Then it will compare the results and the ground acceleration designed. The results will show that the greater value of the load the top of columns get added, the smaller ultimate shear and spectral acceleration it gets. For the simulation analysis of the bridge, after doing the pushover analysis in both directions, the results will show that the ultimate elastic shear of the Y-direction is larger than that of the X-direction, the variations of the capacity curve is more severe than that of the X-direction, and the value of the response spectral acceleration is greater than that of the X-direction. For the seismic analysis of three bridges with different lengths, the longer length of the bridge it is, the smaller ultimate elastic shear and spectral acceleration it gets. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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