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研究生： 梅孟潘
Panjabi, Vinayak Munesh
論文名稱： 使用ATENA進行3D列印UHPC之有限元素模擬：驗證與參數研究
Finite Element Modeling of 3D Printed UHPC Using ATENA: Validation and Parametric Studies
指導教授： 洪崇展
Hung, Chung-Chan
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2026
畢業學年度： 114
語文別： 英文
論文頁數： 163
外文關鍵詞： 3D-printed concrete, UHPC, finite element modeling, ATENA, model validation, parametric study, structural behavior
相關次數： 點閱：20  下載：0 
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    • 3D-printed concrete (3DPC) has emerged as a promising construction technology due to its ability to enable formwork-free fabrication, reduce material waste, and improve design flexibility. When combined with ultra-high-performance concrete (UHPC), the resulting material system offers significantly enhanced mechanical strength, durability, and structural efficiency. However, the complex time-dependent and anisotropic behavior of 3DPC materials presents significant challenges for experimental characterization alone, highlighting the need for reliable numerical modeling approaches.
    This study develops a finite element model of a 3D-printed UHPC hollow short column using ATENA. The model is validated against existing experimental results through direct comparison of load–displacement response, failure mode, and strain distribution. Material properties are derived from a combination of literature sources to ensure a consistent and robust constitutive framework, and interlayer behavior is represented using interface elements. Printing-related properties are based on experimental validation data, and other numerical parameters are defined using standard modeling assumptions.
    The validation results show that the numerical model is able to capture the overall structural response to varying degrees of accuracy. Discrepancies are present, which are attributed to experimental imperfections, geometric irregularities, and limitations in representing certain complex material behaviors numerically. The parametric study results indicate that the structural response of the 3D-printed UHPC column is primarily governed by a combination of geometric effects, material stiffness evolution, and interfacial behavior, which collectively control stiffness development, load-bearing capacity, and failure progression. While certain parameters significantly influence deformation patterns, post-peak behavior, or damage localization, the global peak response remains relatively stable across most variations, with many numerical parameters affecting only the smoothness or stability of the post-peak response rather than the fundamental failure mechanism.

    ABSTRACT iii ACKNOWLEDGEMENTS iv TABLE OF CONTENTS v LIST OF TABLES viii LIST OF FIGURES x CHAPTER I INTRODUCTION 1 1.1. Background 1 1.2. Problem Statement 4 1.3. Research Objectives 4 1.4. Research Methodology 6 CHAPTER II LITERATURE REVIEW 8 2.1. Introduction 8 2.2. Ultra High-Performance Concrete (UHPC) 8 2.2.1. Mechanical Properties of UHPC 8 2.2.2. Constitutive Laws of UHPC 9 2.2.3. Early-Age Mechanical Properties of UHPC 11 2.3. 3DPC Properties 12 2.3.1. 3DPC Mechanical Properties 13 2.3.2. Interlayer Strength Properties of 3DPC 17 2.4. Finite Element Method and ATENA 19 2.4.1. ATENA Fracture-Plastic Model 19 2.4.2. ATENA Interface Material Model 20 2.5. Numerical Modeling of 3DPC 20 2.5.1. General Methodology of Numerical Modeling of 3DPC 21 2.5.2. Mohr-Coulomb Numerical Model of Early Age Printable Concrete 23 2.5.3. Drucker-Prager Model for 3DPC Buildability Prediction 26 2.5.4. Implementation of PFEM in 3DPC Numerical Modeling 27 2.5.5. Concrete Interface Constitutive Laws 29 2.5.6. Numerical Modeling of 3DPC Using ATENA 30 CHAPTER III RESEARCH METHODOLOGY 35 3.1. Introduction 35 3.1.1. Software Setup 35 3.1.2. Experimental Background 37 3.2. Validation Models Development 39 3.2.1. Geometry Definition 39 3.2.2. Material Properties Definition 41 3.2.3. Interlayer Bond Properties Definition 47 3.2.4. Boundary and Loading Conditions Definition 49 3.2.5. DigiCon Properties Definition 50 3.2.6. Interval Properties Definition 52 3.2.7. Mesh Properties Definition 52 3.2.8. Analysis Settings 54 3.2.9. Simulation and Postprocessing 55 3.3. Parametric Study Methodology 56 3.3.1. Wall Thickness 57 3.3.2. Column Height 59 3.3.3. Printing Speed 61 3.3.4. Interlayer Strength 62 3.3.5. Early-Age Concrete Properties 64 3.3.6. Tensile Strength 66 3.3.7. Numerical Loading Rate 68 3.3.8. Mesh Size 69 CHAPTER IV RESULTS AND DISCUSSION 73 4.1. Validation 73 4.1.1. PC08 Specimen 74 4.1.2. PC12 Specimen 81 4.2. Parametric Study Results 86 4.2.1. Wall Thickness 87 4.2.2. Column Height 89 4.2.3. Printing Speed 92 4.2.4. Interlayer Strength 94 4.2.5. Early-age Concrete Properties 99 4.2.6. Tensile Strength 103 4.2.7. Numerical Loading Rate 107 4.2.8. Mesh Size 109 CHAPTER V CONCLUSIONS AND SUGGESTIONS 112 5.1. Conclusions 112 5.2. Future Suggestions 114 REFERENCES 116 APPENDIX A GENERAL MODEL INPUTS 121 APPENDIX B VALIDATION MODEL RESULTS 131 APPENDIX C WALL THICKNESS PARAMETRIC STUDY 134 APPENDIX D COLUMN HEIGHT PARAMETRIC STUDY 136 APPENDIX E PRINTING SPEED PARAMETRIC STUDY 139 APPENDIX F INTERLAYER STRENGTH PARAMETRIC STUDY 141 APPENDIX G EARLY AGE PROPERTIES PARAMETRIC STUDY 143 APPENDIX H TENSILE STRENGTH PARAMETRIC STUDY 145 APPENDIX I NUMERICAL LOADING RATE PARAMETRIC STUDY 147 APPENDIX J MESH SIZE PARAMETRIC STUDY 149

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