TL;DR: In this article, the authors present an overview of the structural properties of metal columns and their application in the design of box girders, including the following: 1.1 Introduction. 2.2 Bifurcation Buckling. 3.3 Influence of End Restraint. 4.4 Inelastic Bending.
Abstract: PREFACE. NOTATION AND ABBREVIATIONS. CHAPTER 1 INTRODUCTION. 1.1 From the Metal Column to the Structural System. 1.2 Scope and Summary of the Guide. 1.3 Mechanical Properties of Structural Metals. 1.4 Definitions. 1.5 Postbuckling Behavior. 1.6 Credits for the Chapters in the Sixth Edition of the SSRC Guide. References. CHAPTER 2 STABILITY THEORY. 2.1 Introduction. 2.2 Bifurcation Buckling. 2.3 Limit-Load Buckling. References. CHAPTER 3 CENTRALLY LOADED COLUMNS. 3.1 Introduction. 3.2 Column Strength. 3.3 Influence of Imperfections. 3.4 Influence of End Restraint. 3.5 Strength Criteria for Steel Columns. 3.6 Aluminum Columns. 3.7 Stainless Steel Columns. 3.8 Tapered Columns. 3.9 Built-Up Columns. 3.10 Stepped Columns. 3.11 Guyed Towers. References. CHAPTER 4 PLATES. 4.1 Introduction. 4.2 Elastic Local Buckling of Flat Plates. 4.3 Inelastic Buckling, Postbuckling, and Strength of Flat Plates. 4.4 Buckling, Postbuckling, and Strength of Stiffened Plates. 4.5 Buckling of Orthotropic Plates. 4.6 Interaction between Plate Elements. References. CHAPTER 5 BEAMS. 5.1 Introduction. 5.2 Elastic Lateral-Torsional Buckling, Prismatic I-Section Members. 5.3 Fundamental Comparison of Design Standards, Prismatic I-Section Members. 5.4 Stepped, Variable Web Depth and Other Nonprismatic I-Section Members. 5.5 Continuous-Span Composite I-Section Members. 5.6 Beams with Other Cross-Sectional Types. 5.7 Design for Inelastic Deformation Capacity. 5.8 Concluding Remarks. References. CHAPTER 6 PLATE GIRDERS. 6.1 Introduction. 6.2 Preliminary Sizing. 6.3 Web Buckling as a Basis for Design. 6.4 Shear Strength of Plate Girders. 6.5 Girders with No Intermediate Stiffeners. 6.6 Steel Plate Shear Walls. 6.7 Bending Strength of Plate Girders. 6.8 Combined Bending and Shear. 6.9 Plate Girders with Longitudinal Stiffeners. 6.10 End Panels. 6.11 Design of Stiffeners. 6.12 Panels under Edge Loading. 6.13 Fatigue. 6.14 Design Principles and Philosophies. 6.15 Girders with Corrugated Webs. 6.16 Research Needs. References. CHAPTER 7 BOX GIRDERS. 7.1 Introduction. 7.2 Bases of Design. 7.3 Buckling of Wide Flanges. 7.4 Bending Strength of Box Girders. 7.5 Nominal Shear Strength of Box Girders. 7.6 Strength of Box Girders under Combined Bending, Compression, and Shear. 7.7 Influence of Torsion on Strength of Box Girders. 7.8 Diaphragms. 7.9 Top-Flange Lateral Bracing of Quasi-Closed Sections. 7.10 Research Needs. References. CHAPTER 8 BEAM-COLUMNS. 8.1 Introduction. 8.2 Strength of Beam-Columns. 8.3 Uniaxial Bending: In-Plane Strength. 8.4 Uniaxial Bending: Lateral-Torsional Buckling. 8.5 Equivalent Uniform Moment Factor. 8.6 Biaxial Bending. 8.7 Special Topics. References. CHAPTER 9 HORIZONTALLY CURVED STEEL GIRDERS. 9.1 Introduction. 9.2 Historical Review. 9.3 Fabrication and Construction. 9.4 Analysis Methods. 9.5 Stability of Curved I-Girders. 9.6 Stability of Curved Box Girders. 9.7 Concluding Remarks. References. CHAPTER 10 COMPOSITE COLUMNS AND STRUCTURAL SYSTEMS. 10.1 Introduction. 10.2 U.S.-Japan Research Program. 10.3 Cross-Sectional Strength of Composite Sections. 10.4 Other Considerations for Cross-Sectional Strength. 10.5 Length Effects. 10.6 Force Transfer between Concrete and Steel. 10.7 Design Approaches. 10.8 Structural Systems and Connections for Composite and Hybrid Structures. 10.9 Summary. References. CHAPTER 11 STABILITY OF ANGLE MEMBERS. 11.1 Introduction. 11.2 Review of Experimental and Analytical Research. 11.3 Single-Angle Compression Members. 11.4 Current Industry Practice for Hot-Rolled Single-Angle Members in the United States. 11.5 Design Criteria for Hot-Rolled Angle Columns in Europe, Australia, and Japan. 11.6 Design of Axially Loaded Cold-Formed Single Angles. 11.7 Concluding Remarks on the Compressive Strength of Eccentrically Loaded Single-Angle Members. 11.8 Multiple Angles in Compression. 11.9 Angles in Flexure. References. CHAPTER 12 BRACING. 12.1 Introduction. 12.2 Background. 12.3 Safety Factors, phi Factors, and Definitions. 12.4 Relative Braces for Columns or Frames. 12.5 Discrete Bracing Systems for Columns. 12.6 Continuous Column Bracing. 12.7 Lean-on Systems. 12.8 Columns Braced on One Flange. 12.9 Beam Buckling and Bracing. 12.10 Beam Bracing. References. CHAPTER 13 THIN-WALLED METAL CONSTRUCTION. 13.1 Introduction. 13.2 Member Stability Modes (Elastic). 13.3 Effective Width Member Design. 13.4 Direct Strength Member Design. 13.5 Additional Design Considerations. 13.6 Structural Assemblies. 13.7 Stainless Steel Structural Members. 13.8 Aluminum Structural Members. 13.9 Torsional Buckling. References. CHAPTER 14 CIRCULAR TUBES AND SHELLS. 14.1 Introduction. 14.2 Description of Buckling Behavior. 14.3 Unstiffened or Heavy-Ring-Stiffened Cylinders. 14.4 General Instability of Ring-Stiffened Cylinders. 14.5 Stringer- or Ring-and-Stringer-Stiffened Cylinders. 14.6 Effects on Column Buckling. 14.7 Cylinders Subjected to Combined Loadings. 14.8 Strength and Behavior of Damaged and Repaired Tubular Columns. References. CHAPTER 15 MEMBERS WITH ELASTIC LATERAL RESTRAINTS. 15.1 Introduction. 15.2 Buckling of the Compression Chord. 15.3 Effect of Secondary Factors on Buckling Load. 15.4 Top-Chord Stresses due to Bending of Floor Beams and to Initial Chord Eccentricities. 15.5 Design Example. 15.6 Plate Girder with Elastically Braced Compression Flange. 15.7 Guyed Towers. References. CHAPTER 16 FRAME STABILITY. 16.1 Introduction. 16.2 Methods of Analysis. 16.3 Frame Behavior. 16.4 Frame Stability Assessment Using Second-Order Analysis. 16.5 Overview of Current Code Provisions. 16.6 Structural Integrity and Disproportionate Collapse Resistance. 16.7 Concluding Remarks. References. CHAPTER 17 ARCHES. 17.1 Introduction. 17.2 In-Plane Stability of Arches. 17.3 Out-of-Plane Stability of Arches. 17.4 Braced Arches and Requirements for Bracing Systems. 17.5 Ultimate Strength of Steel Arch Bridges. References. CHAPTER 18 DOUBLY CURVED SHELLS AND SHELL-LIKE STRUCTURES. 18.1 Introduction. 18.2 The Basic Problem. 18.3 Finite Element Method. 18.4 Design Codes. 18.5 Design Aids. 18.6 Reticulated Shells. 18.7 Design Trends and Research Needs. References. CHAPTER 19 STABILITY UNDER SEISMIC LOADING. 19.1 Introduction. 19.2 Design for Local and Member Stability. 19.3 Global System Stability ( P -DELTA Effects). References. CHAPTER 20 STABILITY ANALYSIS BY THE FINITE ELEMENT METHOD. 20.1 Introduction. 20.2 Nonlinear Analysis. 20.3 Linearized Eigenvalue Buckling Analysis. References. APPENDIX A GENERAL REFERENCES ON STRUCTURAL STABILITY. APPENDIX B TECHNICAL MEMORANDA OF STRUCTURAL STABILITY RESEARCH COUNCIL. B.1 Technical Memorandum No. 1: The Basic Column Formula. B.2 Technical Memorandum No. 2: Notes on the Compression Testing of Metals. B.3 Technical Memorandum No. 3: Stub-Column Test Procedure. B.4 Technical Memorandum No. 4: Procedure for Testing Centrally Loaded Columns. B.5 Technical Memorandum No. 5: General Principles for the Stability Design of Metal Structures. B.6 Technical Memorandum No. 6: Determination of Residual Stresses. B.7 Technical Memorandum No. 7: Tension Testing. B.8 Technical Memorandum No. 8: Standard Methods and Definitions for Tests for Static Yield Stress. B.9 Technical Memorandum No. 9: Flexural Testing. B.10 Technical Memorandum No. 10: Statistical Evaluation of Test Data for Limit States Design. References. APPENDIX C STRUCTURAL STABILITY RESEARCH COUNCIL. NAME INDEX. SUBJECT INDEX.
TL;DR: In this article, a self-centering energy dissipative (SCED) bracing system was proposed for large axial deformations without structural damage while providing stable energy dissipation capacity and a restoring force.
Abstract: Buildings designed according to modern seismic codes are expected to develop a controlled ductile inelastic response during major earthquakes, implying extensive structural damage after a design level earthquake, along with possibly substantial residual deformations. To address this drawback of traditional yielding systems, a new bracing system that can undergo large axial deformations without structural damage while providing stable energy dissipation capacity and a restoring force has recently been developed. The proposed bracing member exhibits a repeatable flag-shaped hysteretic response with full recentering capabilities, therefore eliminating residual deformations. The mechanics of this new system are first explained, the equations governing its design and response are outlined, and one embodiment of the system, which combines a friction dissipative mechanism and Aramid tensioning elements, is further studied. Results from component tests, full-scale (reduced length) quasi-static axial tests, and quasi-static and dynamic seismic tests on a full-scale frame system are presented. Experimental results confirm the expected self-centering behavior of the self-centering energy dissipative (SCED) bracing system within the target design drift. Results also confirm the validity of the design and behavior equations that were developed. It is concluded that the proposed SCED concept can represent a viable alternative to current braced frame systems because of its attractive self-centering property and because the simplicity of the system allows it to be scaled to any desired strength level.
TL;DR: In this article, a subassemblage seismic test program performed on six buckling-restrained braces (BRBs) was described, with two different brace core segment lengths and two different bucklingrestraining mechani...
Abstract: This paper describes a subassemblage seismic test program performed on six buckling-restrained braces (BRBs). Two different brace core segment lengths and two different buckling-restraining mechani...
TL;DR: In this paper, a survey of past experimental studies on the inelastic response of diagonal steel bracing members was carried out to collect data for the seismic design of concentrically braced steel frames for which a ductile response is required under earthquakes.
TL;DR: In this article, an experimental study on the seismic performance of concentrically braced steel frames made with cold-formed rectangular tubular bracing members is presented. But the results clearly show that the effective length of the braces can be used to determine their compression strength and to characterize their hysteretic response, including energy dissipation capability.
Abstract: This paper describes an experimental study on the seismic performance of concentrically braced steel frames made with cold-formed rectangular tubular bracing members. A total of 24 quasistatic cyclic tests were performed on full size X bracing and single diagonal bracing systems. Two loading sequences were considered: a symmetrical stepwise increasing deformation sequence and a displacement history obtained from nonlinear dynamic analyses of typical braced steel frames. All specimens buckled out-of the plane of the frame and the tests were interrupted when fracture of the braces occurred in the region of highest curvature. For X bracing, the results clearly show that the effective length of the braces can be used to determine their compression strength and to characterize their hysteretic response, including energy dissipation capability. Simplified models are proposed to predict the out-of-plane deformation of the braces as a function of the ductility level. These models are then used to develop an empir...