Title

防落拉桿應用於橋梁之振動台實驗與分析

Translated Titles

The Shaking Table Test and Analysis of Bridge with Restrainer

DOI

10.6841/NTUT.2006.00329

Authors

李俊德

Key Words

防落拉桿 ; 振動台實驗 ; 希爾伯特-黃轉換 ; Restrainer ; Shaking Table Test ; Hilbert-Huang Transform

PublicationName

臺北科技大學土木與防災研究所學位論文

Volume or Term/Year and Month of Publication

2006年

Academic Degree Category

碩士

Advisor

李有豐

Content Language

繁體中文

Chinese Abstract

本研究計畫於國家地震中心以一座雙跨縮尺橋梁作震動台實驗,觀察橋梁加裝防落拉桿前後及不同數量、不同尺寸的鋼棒及厚度不同之橡膠墊片裝設時之差異,針對防落拉桿限制兩相鄰橋面版相對位移量做研究探討,並且收集結構分析軟體(SAP2000)中所需設定之參數。將實驗值經由希爾伯特-黃轉換(Hilbert-Huang Transform, HHT)後之2D希爾伯特頻譜(Hilbert spectrum)比較,了解試體於頻率域之變化,可以找出防落拉桿之作用時間及試體頻率的改變量。於SAP2000建立數值分析模型,以一多線性彈性性質元素(Multi-Linear Elasticity Property)模擬防落拉桿,將分析值與實驗值進行比較可以發現在加速度、位移及相對位移都可以準確的模擬。並將分析值經由希爾伯特-黃轉換,與實驗值之頻譜比較,亦可找出防落拉桿之作用時間及試體頻率的改變量。藉由實驗與分析相互驗證之結果,進而提出一簡易的防落拉桿分析方法,日後可由簡單的材料性質實驗結果,輸入所需的參數於程式中分析,即可得到準確的結果。

English Abstract

The behaviors of restrainers of bridges under earthquake were discussed in this thesis. To understand the relative displacement between the superstructure, a shaking table tests of a scale-down simple supported bridge were performed. The Hilbert-Huang transform (HHT) was used to transfer the experimental data of time domain into the frequency domain, and to obtain the Hilbert spectrums of superstructure. The experimental results is compared with the Hilbert spectrums, and we have found that when the structure behavior is varying from linear to non-linear. From the Hilbert spectrums, the starting operating moment of the restrainers can be detected. A finite-element model is used to simulate the experimental results and to understand the restrainers mechanism under earthquake loading. The results of the non-linear time history analysis is compared with the experimental results. It is found that the analytical maximum displacement is coincedence with the experimental value.

Topic Category 工程學院 > 土木與防災研究所
工程學 > 土木與建築工程
工程學 > 市政與環境工程
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Times Cited
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