會議論文
| 學年 | 96 |
|---|---|
| 學期 | 1 |
| 發表日期 | 2007-09-06 |
| 作品名稱 | 碳纖維索斜張橋阻尼特性對地震反應影響之研究 |
| 作品名稱（其他語言） | A Study on Seismic Response Effects Relating to Damping Characteristics of Cable-Stayed Bridges with Carbon Fiber Composite Cables |
| 著者 | 苟昌煥; 高金盛; 江坤霖; 馬世瑋; 蔡政霖 |
| 作品所屬單位 | 淡江大學土木工程學系 |
| 出版者 | 臺北縣淡水鎮 : 中國土木水利工程學會 |
| 會議名稱 | 九十六年電子計算機於土木水利工程應用研討會=2007 Conference on Computer Application in civil & Hydraulic Engineering |
| 會議地點 | 臺北縣, 臺灣 |
| 摘要 | In large span cable-stayed bridges, self-vibration of cables covered a wide range due to unequal cable lengths in the system; coupled vibration is prone to occur when local vibration of a cable caused by the load of a vehicle, an earthquake, or the wind or rain resonates with the bridge system. Studies reveal that for carbon-fiber cable-stayed bridges, when calculating the strain proportioned damping, damping ratio of part of vibration modes will somehow be over-estimated if not taking the influence of local cable vibration into consideration; in a low proportion, though. Comparing with steel cable-stayed bridges, in a carbon-fiber cable-stayed bridge, whether or not considering the local vibrations has a more substantial effect on the damping distribution. Moreover, when using constant damping to calculate seismic reactions of a large span cable stayed bridge, more significant seismic reactions are often attained; therefore this is a more conservative analysis model. When using Rayleigh Damping theory to simulate damping characteristics, significant deviations in seismic reactions will occur due to different selection of referencing vibration modes. 在跨徑較大的斜張橋中，長短不一的纜索體系所涵蓋的自振範圍很大，在車輛、地震或風雨荷載作用下，纜索的局部振動易與橋梁體系發生耦合振動的現象。研究結果顯示，碳纖維索斜張橋若不考慮纜索局部振動之影響，在計算應變能比例阻尼時將會些許高估部份振態之阻尼比，但比例並不大，而鋼索斜張橋與碳纖維索斜張橋相較，考慮及不纜索之局部振動，將對阻尼之分佈有著較大的差異。另外，當利用常數阻尼來計算大垮徑斜張橋地震反應時，往往可以得到較大的地震反應，屬於較為保守的分析模式;而當利用雷利阻尼理論來模擬其阻尼特性時，將會因選取的參考振態不同而產生極大的地震反應差異。 |
| 關鍵字 | 斜張橋;纜索的局部振動;碳纖維索;地震反應;阻尼;cable-stayed bridge;local vibration of cables;carbon-fiber cable;seismic response;damping |
| 語言 | zh_TW |
| 收錄於 | |
| 會議性質 | 國內 |
| 校內研討會地點 | 淡水校園 |
| 研討會時間 | 20070906~20070907 |
| 通訊作者 | |
| 國別 | TWN |
| 公開徵稿 | Y |
| 出版型式 | 紙本 |
| 出處 | 九十六年電子計算機於土木水利工程應用研討會論文集=Proceedings of 2007 Conference on Computer Application in civil & Hydraulic Engineering，頁477-482 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/97127 ) |