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基于机械阻抗方法的钢—混凝土组合梁局部损伤检测研究

摘要第4-5页
ABSTRACT第5-6页
CHAPTER 1 INTRODUCTION第10-14页
    1.1 Motivation and Background第10-11页
    1.2 Objectives and Scope第11-12页
    1.3 Organization of thesis第12-14页
CHAPTER 2 LITERATURE REVIEW第14-36页
    2.1 Introduction第14页
    2.2 Structural Health Monitoring (SHM) of civil infrastructures第14-16页
    2.3 Conventional techniques of Structural Health Monitoring (SHM)第16-19页
        2.3.1 Vibration-based SHM techniques第16页
        2.3.2 Static response-based techniques第16-17页
        2.3.3 Dynamic response-based techniques第17-18页
        2.3.4 Local SHM techniques第18-19页
    2.4 Techniques using smart systems/structures concepts for SHM第19-22页
        2.4.1 Smart structure第20-21页
        2.4.2 Smart materials第21-22页
        2.4.3 Components of Smart System第22页
        2.4.4 Potential applications of smart systems in civil engineering第22页
    2.5 Structural Health Monitoring (SHM) with Piezoelectricity and Piezoelectric materials第22-29页
        2.5.1 History of piezoelectricity第22-23页
        2.5.2 Constitutive piezoelectric relations第23-27页
            2.5.2.1 Piezoelectric directions and coefficients第23-24页
            2.5.2.2 Basic piezoelectric equations第24-27页
        2.5.3 Type of piezoelectric materials第27-29页
            2.5.3.1 Piezoceramics第27-28页
            2.5.3.2 Piezopolymers第28-29页
    2.6 Damages detection methods based on piezoelectric material第29-36页
        2.6.1 Development of Lamb wave propagation method第29-31页
        2.6.2 Development of Electromechanical Impedance (EMI) method第31-36页
CHAPTER 3 ELECTROMECHANICAL IMPEDANCE (EMI) METHOD第36-48页
    3.1 Introduction第36页
    3.2 Principle and formula derivation第36-38页
    3.3 PZT-Structure Interaction第38-40页
    3.4 Parameters of the Electromechanical Impedance Method第40-43页
        3.4.1 Frequency Ranges第40页
        3.4.2 Sensing Region第40-41页
        3.4.3 Damage Assessment第41-43页
    3.5 Electromechanical Admittance measurement第43-45页
        3.5.1 Measurement using impedance analyzer第43-44页
        3.5.2 Calculation using ANSYS software第44-45页
    3.6 Advantages of EMI Technique第45-47页
    3.7 Limitations of EMI Technique第47-48页
CHAPTER 4 NUMERICAL SIMULATION第48-70页
    4.1 Introduction第48页
    4.2 Typical description and detail models of steel-concrete composite beam第48-53页
        4.2.1 Steel beam第49页
        4.2.2 Concrete slab第49-51页
            4.2.2.1 Effective cross section第50页
            4.2.2.2 Depth of concrete slab hc第50-51页
        4.2.3 Shear studs第51-53页
            4.2.3.1 Shear force to be transferred by connectors第52页
            4.2.3.2 Resistance of studs PRk第52页
            4.2.3.3 Number of shear stud connectors第52-53页
            4.2.3.4 Spacing of shear studs in the beam section第53页
            4.2.3.5 Spacing of end studs第53页
    4.3 Finite Element analysis第53-66页
        4.3.1 General modeling of steel-concrete composite beam第54-63页
            4.3.1.1 Element type第54-57页
            4.3.1.2 Real constants第57-58页
            4.3.1.3 Element Properties第58-59页
            4.3.1.4 Modeling of the beam第59-60页
            4.3.1.5 Meshing of beam第60-61页
            4.3.1.6 Shear key modeling第61-62页
            4.3.1.7 Loads and boundary condition第62-63页
        4.3.2 Static analysis of the steel-concrete composite beam第63-66页
    4.4 Harmonic analysis第66-70页
        4.4.1 Calculation procedures第66-67页
        4.4.2 FE model of steel-concrete composite beam第67页
        4.4.3 FE model of PZT patch第67-70页
CHAPTER 5 RESULTS AND DISCUSSIONS第70-90页
    5.1 Introduction第70页
    5.2 Influence of damage distance s or/and damage depth d to the PZT patches basedon the real part of PZT admittance第70-81页
        5.2.1 Case 1: Damage in concrete slab第70-74页
        5.2.2 Case 2: Shear Stud and concrete slab debonding第74-78页
        5.2.3 Case 3: Steel beam and concrete slab debonding第78-81页
    5.3 Qualitative analysis of the impact of law under different conditions by RMSD第81-90页
        5.3.1 Case 1: Damage in concrete slab第82-84页
        5.3.2 Case 2: Shear Stud and concrete slab debonding第84-86页
        5.3.3 Case 3: Steel beam and concrete slab debonding第86-90页
CHAPTER 6 CONCLUSION AND RECOMMENDATIONS第90-94页
    6.1 Summary of research work第90页
    6.2 Conclusion第90-91页
    6.3 Recommendations for further research第91-94页
REFERENCES第94-104页
ACKNOWLEDGEMENTS第104页

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