蔡益超臺灣大學：土木工程學研究所方嘉宏Fang, Cha-HungCha-HungFang2007-11-252018-07-092007-11-252018-07-092005http://ntur.lib.ntu.edu.tw//handle/246246/50444本研究主要是著重在防震拉桿於非線性動力分析下對整體橋梁結構反映之貢獻，並藉由非線性分析之結果，提出一個可行之防震拉桿分析流程。 地震歷時採用保留相角與修正傅氏震幅譜之方式，求得符合規範第三類地盤反應譜之人造地震歷時，並進行三筆非線性動力分析。另本論文亦考慮防震拉桿及橋柱之非線性行為，探討兩者進入非線性時對整體橋樑之影響，包括防落長度檢核，碰撞效應，韌性比，振動特性以及內力再分配之可能性。而防震拉桿依其參數變化共24種不同性質，考慮非線性動力分析後之結果，修正美國加州公路局對防震拉桿之設計流程，提出一套考慮橋梁非線性行為之設計流程，並訂定出使用之條件假設及限制，做為工程師設計防震拉桿之依據。The study focuses on the contribution of bridges with restrainers that consider nonlinear behavior of each pier and restrainers. Based on the results from nonlinear dynamic analysis, we can obtain a reasonable design procedure. For nonlinear dynamic analysis, each using time history is simulated from keeps phase spectrum and modifies Fourier amplitude. There are three original ground motion are used in the study. So the spectrum compatible design ground motion can be determined for nonlinear dynamic analysis. For handle the responses of restrainer exactly, we use 24 cases from change parameters of restrainer. Besides the classification of restrainers, we also consider nonlinear behavior about restrainer and pier in bridge structure. That includes check the available seat width, impact event, ductility, force-redistribution. Based on the results from nonlinear dynamic analysis, the method of caltrans can be correction and set up a more reasonable design procedure and some limits and assumptions for the procedure bring out, too.TABLE OF CONTENTS ABSTRACT (IN CHINESE) Ⅱ ABSTRACT (IN ENGLISH) Ⅲ TABLE OF CONTENTS Ⅳ LIST OF TABLES Ⅵ LIST OF FIGURES Ⅷ 1. INTRODUCTION 1 1.1 General Remarks 1 1.2 Literature Reviews 2 1.3 Outlines 2 2. THEORIES 4 2.1 Spectrum compatible design ground motion 4 2.2 Nonlinear Time-History Analysis 6 2.3 Mode Superposition 6 2.4 Combining Maximum Modal Response (CQC Method) 9 2.5 Composite modal damping 9 2.6 Tentative simplified restrainer analysis (caltrans method) 10 2.6.1 Assumptions for the procedure 10 2.6.2 General procedure 11 3. MODELING 15 3.1 Introduction to the bridge 15 3.2 Simulation for beam 16 3.3 Simulation for column 16 3.4 Constrain Equation 19 3.5 Simulation for restrainer (can’t dissipate energy) 19 3.6 Multi-Linear Kinematic Plastic property 20 3.7 Modeling Result 20 4. REAL CASE ANALYSIS 22 4.1 Product design ground motion 22 4.2 Introduction for analysis 23 4.2.1 Classification for restrainer 24 4.2.2 Result of dynamic analysis 25 4.2.3 Discussion the phase angle of each case 28 4.3 Check impact effect 29 4.4 Conclusion Remarks 29 5. CRRECTION DESIGN PROCEDURE OF RESTRAINER 32 5.1 Design purpose 32 5.2 Conditions and limits for design procedures 32 5.3 Design procedure 34 5.4 Compare two design procedures 36 6. CONCLUSIONS AND FUTURE STUDIES 37 6.1 Conclusions to this study 37 6.2 Future studies 38 REFERENCES 39 TABLES 40 FIGURES 58860024 bytesapplication/pdfen-US防震拉桿諧和反應譜之人造地震非線性動力分析富氏震幅譜韌性比防落長度RestrainerSpectrum compatible design ground motionFourier amplitude spectrumNonlinear dynamic analysisDuctility ratioAvailable seat widththesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/50444/1/ntu-94-R92521218-1.pdf