Investigation of the Near-fault Earthquake Effect for a River Bridge｜國立臺灣科技大學博碩士論文系統

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研究生：	Irene anggraini Irene anggraini
論文名稱：	Investigation of the Near-fault Earthquake Effect for a River Bridge Investigation of the Near-fault Earthquake Effect for a River Bridge
指導教授：	邱建國 Chien-Kuo Chiu
口試委員:	廖國偉 Kuo-Wei Liao 陳瑞華 Cherng, Rwey-Hua
學位類別：	碩士 Master
系所名稱：	工程學院 - 營建工程系 Department of Civil and Construction Engineering
論文出版年：	2018
畢業學年度：	106
語文別：	英文
論文頁數：	152
中文關鍵詞：	fragility curve 、Non linear time history analysis
外文關鍵詞：	fragility curve, Non linear time history analysis
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Earthquake ground motion takes important part in representing the strength of the earthquake. Near-fault ground motion has significant effect on the response of the structure. Hence, the purpose of this research is to investigate the safety status of a bridge based on probability of exceedance subjected to both near-fault ground motion and far-field ground motion excitations. In order to present the accuracy of the result, fragility curve will be used as probability approaches. A highway bridge located in Changhua County was selected in this study. Non-linear time history is performed to obtain the structure performance under different PGA values. The fragility curve is constructed from calculating of displacement ductility from the response of time history analysis. The results show that fitting ground motions based on a design response spectrum may be an unsuitable approach. However, structural performances under normalized PGA values give a significant difference between near and far-field ground motions.

ABSTRACT .................................................................................................................. iv
LIST OF FIGURES ..................................................................................................... vii
LIST OF TABLES ....................................................................................................... xii
NOTATIONS .............................................................................................................. xvi
CHAPTER 1. INTRODUCTION .................................................................................. 1
1.1 Background ..................................................................................................... 1
1.2 Motivation research ......................................................................................... 2
1.3 Objective and scope ........................................................................................ 3
1.4 Outline ............................................................................................................. 3
CHAPTER 2. LITERATURE REVIEW ....................................................................... 5
2.1 Properties of concrete ........................................................................................... 5
2.1.1 Cover concrete ............................................................................................... 5
2.1.2 Core concrete ................................................................................................. 5
2.2 Properties of steel ................................................................................................. 6
2.3 Failure mode ......................................................................................................... 7
2.4 Standard codes...................................................................................................... 9
2.4.1 AASHTO Guide Specification for Seismic Bridge Design........................... 9
2.4.2 Taiwan Code for Soil Spring ....................................................................... 10
2.4.3 Taiwan Code for Response Spectrum ......................................................... 11
2.5 Ground Motion ................................................................................................... 12
2.5.1 Near fault ground motion ............................................................................ 13
2.5.2 Far-field ground motion............................................................................... 16
2.6 Input Energy ....................................................................................................... 16
CHAPTER 3. METHODOLOGY ............................................................................... 19
vi
3.1 Bridge General Information ............................................................................... 19
3.2 Methodology ...................................................................................................... 21
3.3 Modelling of structural Section .......................................................................... 23
3.4 Soil Modelling .................................................................................................... 24
3.4 Non-linear Property ............................................................................................ 26
3.5 Time history analysis ......................................................................................... 29
3.6 Fragility Curve ................................................................................................... 34
CHAPTER 4. ANALYSIS RESULT .......................................................................... 38
4.1 Fragility curve .................................................................................................... 38
4.2 Input Energy ....................................................................................................... 46
CHAPTER 5. CONCLUSION AND SUGGESTION ................................................. 56
5.1 Conclusion .......................................................................................................... 56
5.2 Suggestion .......................................................................................................... 58
APPENDIX A. BRIDGE DRAWING ......................................................................... 59
APPENDIX B. SAFETY FACTOR ............................................................................ 64
APPENDIX C. RESPONSE SPECTRUM AND GROUND MOTION ................... 108
REFERENCES .......................................................................................................... 132
                                

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