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研究生:吳凰文
研究生(外文):Haung-Wen Wu
論文名稱:不規則建築結構系統之時變動態參數識別
論文名稱(外文):Time-Varying System Identification of Irregular Buildings
指導教授:林其璋林其璋引用關係
指導教授(外文):Chi-Chang Lin
學位類別:碩士
校院名稱:國立中興大學
系所名稱:土木工程學系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2002
畢業學年度:90
語文別:中文
論文頁數:112
中文關鍵詞:Time-VaryingIrregular BuildingsSystem Identification
外文關鍵詞:時變性不規則建築結構系統識別
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本文主要應用SRIM時域系統識別方法,配合時間窗訊號移動截取技巧(稱為WSRIM),試圖以不同區段間的等值線性反應來瞭解結構參數的時變性。文中除以數值模擬驗證本文方法之可行性外,並應用中央氣象局之強震監測系統所量測到之實測地震記錄,考慮土壤結構互制效應,以進行視窗化的結構時變系統參數識別,藉此探討結構受地震作用下動態參數隨時間之變化,作為評估結構受震過程中動態反應之參考。國立中興大學土木環工大樓為中部地區唯一裝設氣象局強震監測系統之大樓,在921地震中遭受了中度損壞,本文將利用當時所測得的地震記錄,求得本大樓在921主震與後續餘震中結構動態特性之變化,以驗證所發展的時變性系統參數識別方法之準確性及可靠度。

This paper deals with the applicability of SRIM system identification technique together with time moving windows (called WSRIM) to evaluate the time-varying dynamic properties of a building to assess its damage based on real earthquake records considering soil-structure interaction effect. Successive short segments of input and output signals are selected and the SRIM system identification technique is applied to identify the real-time structural properties during that segment of time. Both numerical simulations and real earthquake response measurements from several building floors and foundations are utilized to verify the accuracy of the proposed time-varying system identification technique. The seven-story Civil and Environmental Engineering Department Building in National Chung-Hsing University is the only instrumented building in Central Taiwan. It experienced moderate structural damage during the 921 Chi-Chi earthquake. This paper is to evaluate the time-varying structural modal parameters of this school building based on the acceleration records during 921 Chi-Chi earthquake main shock and its after-shock. It is proved that the proposed technique is useful for real-time dynamic property assessment of buildings.

目錄
謝誌 i
中文摘要 ii
Abstract iii
目錄 iv
表格目錄 vii
圖形目錄 ix
第一章 緒論 1
1.1 研究動機與目的 1
1.2 文獻回顧 2
1.3 本文內容 6
第二章 考慮土壤─結構互制效應 8
2.1 土壤─結構互制系統模式與運動方程式 9
2.2 SSI效應轉換矩陣 11
第三章 時變結構系統識別理論 15
3.1 狀態空間模式 15
3.1.1 連續時間狀態方程式 15
3.1.2 離散時間狀態方程式 17
3.1.3 馬可夫參數之唯一性 19
3.2 SRIM系統參數識別技巧 20
3.2.1 MIMO系統線性式 21
3.2.2 狀態空間參數之萃取 23
3.3 萃取系統模態參數 29
3.4 座標轉換技巧 31
3.5 訊號放大技巧 33
3.6 系統輸出輸入選擇 36
第四章 時變系統參數識別之數值驗證 38
4.1 無雜訊之系統識別 38
4.2 含雜訊之系統識別 39
4.2.1 量測雜訊 39
4.2.2 模擬數值分析 40
4.3 濾除雜訊之系統識別 41
4.3.1 濾波器之形式 41
4.3.2 非遞歸離散時間濾波器 42
4.3.3 數值模擬分析 44
4.4 MIMO系統識別 44
第五章 中興大學土木環工大樓強震記錄分析 46
5.1 結構及強震監測系統 46
5.2 強震儀地震記錄之基線校正 47
5.3 強震儀之實測資料 51
5.4 分析結果 52
第六章 結論與建議 54
參考文獻 56
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