具防落設施裝置與不等高橋柱之橋梁受地震歷時之時間域與頻率域分析

Time and Frequency Domains Analysis on Bridge with Unequal Height Column and Functional Unseating Prevention Devices

周政毅(Cheng-Yi Chou)

指導教授 ： 李有豐

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2009年)

摘要

本論文旨在研究不同的橋梁防落設施裝置(橡膠支承墊，防震拉桿，止震塊)對於不等高橋柱橋梁在地震歷時做用下的影響，利用現行廣泛使用於業界的結構分析軟體SAP2000針對不同橋柱高低比建立橋梁的數值分析模型，進行El-Centro地震歷時非線性動力分析。於時間域觀察橡膠支承墊位移及各防落裝設施置間的互制行為，並提出一套針對不等高橋柱橋梁及各種橋梁防落設施裝置的簡易分析方法。使用希爾伯特-黃轉換(Hibert-Huang Transform, HHT)後之2D希爾伯特頻譜(Hibert spectrum)瞭解裝設各防落設施裝置之橋梁在頻率域之變化，可得到防落設施裝置的作動次序，整合出一套針對不同橋柱高低比橋梁在地震力作用下防落設施裝置的作動機制。本文之成果可供工程師一套設計具防落設施裝置之橋梁的有效分析方法和分析流程。

關鍵字

不等高橋柱橋梁 ； 防落設施裝置 ； 非線性動力歷時分析 ； 希爾伯特-黃轉換

並列摘要

In this thesis, the mechanical behaviors of bridge with functional unseating prevention devices (rubber bearing, restrainer, and shear key) were investigated by using the time and frequency domains analysis. The functions of the devices are to prevent bridge from unseating and to prevent most of the seismic force transfer to the bridge column. The non-linear dynamics analysis with SAP 2000 was used to simulate the bridges with unequal height column. The Hilbert-Huang Transform (HHT) was also used to transfer the time history response into the time-frequency domain and also to obtain the Hilbert spectrums of the rubber bearing displacement of bridges. The Hilbert spectrums can determine when the functional unseating prevention devices were operated and their operation sequences. The results of this thesis can provide bridge engineer to understand the mechanical behaviors of unseating prevention devices with unequal height columns and how to design functional unseating prevention devices in bridge with different column height ratio.

並列關鍵字

Unequal height columns ； Functional unseating prevention devices ； Non-linear dynamics analysis ； Hilbert-Huang Transform

參考文獻

[46] 張國鎮、郭拱源、盧智宏(2001)，921炎峰橋震害模擬，2001地震境況模擬研討會，國家地震工程研究中心。

[50] 陳威逸(2007)，含功能性支承縮尺橋梁之試驗與分析，碩士論文，國立台灣土木工程學系研究所，臺北。

[60] 鄭維晉(2008)，裝設橡膠支承墊之斜橋縮尺模型試驗，碩士論文，國立台灣土木工程學系研究所，臺北。

[1] Andrawes, B. and DesRoches R. (2007). "Effect of Ambient Temperature on the Hinge Opening in Bridges with Shape Memory Alloy Seismic Restrainers," Engineering Structures, Vol. 29, No. 9, pp. 2294-2301.

[2] Andrawes, B. and Desroches R. (2007). "Comparison between Shape Memory Alloy Seismic Restrainers and Other Bridge Retrofit Devices," Journal of Bridge Engineering, Vol. 12, No. 6, pp. 700-709.