Items with full text/Total items : 65421/65421 (100%)
Visitors : 22271141
Online Users : 200
Please use this identifier to cite or link to this item:
|Issue Date: ||2016-10-13 12:14:36 (UTC+8)|
;The mechanism of isolated bridges is mainly by using the isolator to prolong the structural period to reduce the seismic force. However, for those bridges located in stable soil condition site can also be designed by use the spread foundation, which can reduce the seismic force of the main structure by rocking response, under the extreme earthquake. The aim of this study is to discuss the dynamic response of isolated bridge considering the rocking mechanism of spread foundations by doing a series of shaking table tests. Experiments show that the displacement of both deck and top of pier increase under the rocking effect of foundation, but the internal force of the pier decrease. This result gives the proof that the rocking mechanism can also provide the isolation effect.
The finite element method is also adopted in this study to simulate the dynamic behaviour of the isolated bridges under different size of spread foundations. The target bridge is a five-span continuous bridge, simulation results show that the foundational rocking increases the feasibility, and the pier can also maintain in the elastic behavior, furthermore, the required strength and ductility of the pier can be decreased.
|Appears in Collections:||[土木工程研究所] 博碩士論文|
Files in This Item:
All items in NCUIR are protected by copyright, with all rights reserved.
::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期：8-24-2009 :::