| 1. INTRODUCTION 1.1. Introduction 1.2. US Codes 1.3. Connection Classifications 1.3.1. Proposed AISC LRFD Connection Classification 1.3.1.1. Strength 1.3.1.2. Ductility 1.3.1.3. Stiffness 1.4. Connection Behaviour 1.4.1. Connection Database 1.4.2. Connection Modelling 1.4.3. Determination of the Modelling Parameters 1.5. Analysis of Frames with PR Connections 2. LFRD FRAME DESIGN WITH PR CONNECTIONS 2.1. Introduction 2.2. Modeling of connections 2.2.1. Types of Semi-Rigid Connections 2.2.2. Modeling Connections 2.2.3. Classifications 2.3. Procedures of LRFD Frame Design 2.3.1. Design Procedures 2.3.2. Analysis and Design Principles with LFRD 2.3.3. Recommendation of Analysis/Design Procedure 2.4. Design Tables for Top- and Seat-Angle with Double Web-Angle Connections 2.4.1. Practical Design Considerations 2.5. Design Example -- One-Bay Two-Story PR Frame 2.5.1. Analysis 2.6. Summary Appendix A. Source File of table.cpp Appendix B. Source file of modstiff.cc Appendix C. Source File of unit.cpp Appendix D. Design Tables 3. APPROXIMATE ANALYSIS FOR DESIGN OF SEMI-RIGID STEEL FRAMES 3.1. Introduction 3.2. End-Fixity Factor and Semi-Rigid Beam 3.3. Moment Distribution for Semi-Rigid Continuous Beams and Non-Sway Frames 3.4. Moment Distribution for Sway Frames 3.5. Algebraic Moment Distribution for Semi-Rigid Structures 4. PRACTICAL COMPUTER-BASED ANALYSIS OF SEMI-RIGID STEEL FRAMES 4.1. Introduction 4.2. Model of Nonlinear Behavior of Beam-to-Column Connection 4.3. Connection Database 4.4. Model of Semi-Rigid Beam-Column Element 4.5. First-Order Analysis 4.6. Second-Order Analysis 4.7. Example Analysis 4.8. Modification of Column Effective Length Factor 4.9. Conclusion Appendix. Illustration of Connection Database 5. DESIGN OPTIMIZATION OF SEMI-RIGID STEEL FRAMES 5.1. Introduction 5.2. Design Formulation 5.3. Sensitivity Analysis 5.3.1. Displacement Sensitivity Analysis 5.3.2. Stress Sensitivity Analysis 5.4. Optimization Procedure 5.4.1. Continuous-Discrete Optimization Algorithm 5.4.2. Connection Selection 5.4.3. Design Verification 5.5. Cost Coefficients 5.6. Illustrative Examples 5.6.1. Three-Bay Unbraced Frames 5.6.2. Three Bay Two-Story Frame 5.7. Conclusions 5.8. Appendix I: Miscellaneous Expressions 5.8.1. Derivatives of Ci and Gi Matrices …… 6. PR CONNECTION DATABASE 7.ADVANCED ANALYSIS FOR SEISMIC DESIGN OF BUIL DING FRAMES Appendix:Detailed Comparisons Between 1997and the 1992LFRD Seismic Provisions |
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