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研究生： 吳勇樂
Elian Davin Mulyadi
論文名稱： Numerical Simulations of Soil Liquefaction and Seismic Behavior of Corroded Underground Structure using PLAXIS 2D
Numerical Simulations of Soil Liquefaction and Seismic Behavior of Corroded Underground Structure using PLAXIS 2D
指導教授： 李安叡
An-Jui Li
口試委員: 王泰典
Tai-Tien Wang
盧之偉
Chih-Wei Lu
陳家漢
Chia-Han Chen
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： 2023
畢業學年度： 111
語文別： 英文
論文頁數： 198
外文關鍵詞： corroded structure, strong earthquake, PLAXIS 2D analysis
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    • In the world of geotechnical engineering, local soil conditions play an important role in the damage caused by earthquakes to structures. It is well known that different soil types can generate different seismic waves during earthquakes, and the way they affect nearby structures depends on their properties. One of the most complex phenomena that can occur during earthquakes and cause severe damage to structures is liquefaction. Meanwhile, it is also undeniable that the world of civil engineering itself, including underground structures, is closely related to corrosion problems. Considering these problems, numerical analysis must be carried out. Therefore, in this study, PLAXIS 2D software is used not only to obtain the results of liquefaction potential, but also to simulate the seismic behavior and structural performance of the deterioration of reinforced concrete structures due to various grades and ranges of corrosion damage. The results show that in strong earthquakes such as the 1999 Chi-Chi earthquake in Taiwan and the 1995 Kobe earthquake in Japan, corroded underground structures have some impacts to the results.

    ABSTRACT .................................................................................................................... i TABLE OF CONTENTS ............................................................................................... ii LIST OF FIGURES ....................................................................................................... v LIST OF TABLES ........................................................................................................ xi CHAPTER 1. INTRODUCTION ............................................................................ 1 1.1. Research Background .................................................................................. 1 1.2. Research Objectives .................................................................................... 2 1.3. Thesis Structure ........................................................................................... 3 CHAPTER 2. LITERATURE REVIEW ................................................................. 5 2.1. Deep Excavation Engineering Study Background ...................................... 5 2.1.1. Retaining Wall Deformation due to Deep Excavation ......................... 5 2.1.2. Ground Surface Settlement due to Deep Excavation ........................... 6 2.1.2.1. Types of Ground Surface Settlement ................................................ 6 2.1.2.2. Magnitude of Maximum Ground Surface Settlement ....................... 8 2.1.2.3. Influence Zones of Ground Surface Settlement ................................ 8 2.2. Steel Reinforcement Corrosion Study Background ..................................... 9 2.2.1. Types of Steel Reinforcement Corrosion ............................................. 9 2.2.2. Mechanical Properties of Corroded Steel Reinforcement .................. 12 2.2.2.1. Weight Reduction Rate of Corroded Steel Reinforcement ............. 12 2.2.2.2. Local Magnification Rate of Corroded Steel Reinforcement ......... 13 2.3. Effect of Spalling of the Concrete Protective Layer Study Background ... 14 CHAPTER 3. NUMERICAL ANALYSIS MODEL ............................................ 15 3.1. Two-Dimensional Numerical Analysis Software using PLAXIS 2D ....... 15 3.1.1. Hardening Soil (HS) Model ............................................................... 15 3.1.1.1. m Parameter .................................................................................... 16 3.1.1.2. E50ref Parameter ............................................................................... 16 3.1.1.3. Eoedref Parameter .............................................................................. 17 3.1.1.4. Eurref Parameter ................................................................................ 17 3.1.2. Hardening Soil with Small-Strain Stiffness (HSS) Model ................. 17 3.1.2.1. Hysteresis Damping in a Small-Strain Stiffness Model .................. 20 3.1.3. UBC3D-PLM Model .......................................................................... 23 3.1.3.1. Stiffness Parameters kB*e, kG*e, kG*p, me, ne, and np ...................... 24 3.1.3.2. Strength Parameters φcv, φp, and c .................................................. 24 3.1.3.3. Advanced Parameters Rf, fdens, and fEpost ......................................... 25 3.1.3.4. Corrected SPT Value (N1)60 ............................................................ 25 3.1.3.5. ru in Terms of ru,σ'v ........................................................................... 26 3.1.3.6. ru in Terms of ru,p' ............................................................................ 26 3.2. XTRACT Software .................................................................................... 27 3.2.1. XTRACT for Bending Moment Analysis .......................................... 27 3.3. Numerical Model Parameters Establishment ............................................ 27 3.3.1. Soil Profile ......................................................................................... 27 3.3.2. Structural Components Parameters .................................................... 33 3.3.2.1. Case Study of Taipei National Enterprise Center (TNEC) ............. 33 3.3.2.2. Continuous Wall Parameters ........................................................... 35 3.3.2.3. Temporary Steel Struts and Slabs Parameters ................................ 40 3.3.2.4. Steel Columns Parameters .............................................................. 40 3.3.2.5. Model Boundary ............................................................................. 41 3.4. Dynamic Analysis Setup ........................................................................... 42 3.4.1. Introduction to Seismic Intensity ....................................................... 42 3.4.2. Seismic Cases ..................................................................................... 44 3.4.2.1. Kobe Earthquake ............................................................................. 44 3.4.2.2. Chi-Chi Earthquake ......................................................................... 44 CHAPTER 4. RESULT AND DISCUSSION ....................................................... 46 4.1. Analysis Plan ............................................................................................. 46 4.1.1. Different Grades of Corroded Reinforcements .................................. 47 4.1.2. Different Areas of Corroded Reinforcements .................................... 47 4.2. Static Analysis Results .............................................................................. 48 4.3. Dynamic Analysis Results ......................................................................... 53 4.3.1. Kobe Earthquake ................................................................................ 67 4.3.1.1. Wall Deformation (ux) .................................................................... 67 4.3.1.2. Ground Settlement (uy) ................................................................... 67 4.3.1.3. Wall Bending Moment .................................................................... 67 4.3.1.4. Internal Force Diagram and Damage State of the Wall .................. 68 4.3.1.5. Slabs Deformation (uy) .................................................................... 68 4.3.1.6. Slabs Bending Moment ................................................................... 68 4.3.1.7. Slabs Axial Force ............................................................................ 68 4.3.1.8. Excess Pore Pressure and Excess Pore Pressure Ratio (ru) ............. 69 4.3.2. Chi-Chi Earthquake .......................................................................... 109 4.3.2.1. Wall Deformation (ux) .................................................................. 109 4.3.2.2. Ground Settlement (uy) ................................................................. 109 4.3.2.3. Wall Bending Moment .................................................................. 109 4.3.2.4. Internal Force Diagram and Damage State of the Wall ................ 109 4.3.2.5. Slabs Deformation (uy) .................................................................. 110 4.3.2.6. Slabs Bending Moment ................................................................. 110 4.3.2.7. Slabs Axial Force .......................................................................... 110 4.3.2.8. Excess Pore Pressure and Excess Pore Pressure Ratio (ru) ........... 110 CHAPTER 5. CONCLUSION AND FUTURE WORK ..................................... 181 5.1. Conclusion ............................................................................................... 181 5.2. Future Work ............................................................................................. 182 REFERENCES .......................................................................................................... 183

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