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Basic Theory of Plates and Elastic Stability - Part 17

Tài liệu tham khảo giáo trình cơ học kết cấu trong ngành xây dựng bằng Tiếng Anh - Yamaguchi, E. “Basic Theory of Plates and Elastic Stability” Structural Engineering Handbook Ed. Chen Wai-Fah Boca Raton: CRC Press LLC, 1999 - Effective Length Factors of Compression Members | Duan L. and Chen W.F. Effective Length Factors of Compression Members Structural Engineering Handbook Ed. Chen Wai-Fah Boca Raton CRC Press LLC 1999 Effective Length Factors of Compression Members Lian Duan Division of Structures California Department of Transportation Sacramento CA W.F. Chen School of Civil Engineering Purdue University West Lafayette IN 17.1 Introduction 17.2 Basic Concept 17.3 Isolated Columns 17.4 Framed Columns Alignment Chart Method Alignment Chart Method Requirements for Braced Frames Simplified Equations to Alignment Charts 17.5 Modifications to Alignment Charts Different Restraining Girder End Conditions Different Restraining Column End Conditions Column Restrained by Tapered Rectangular Girders Unsymmetrical Frames Effects of Axial Forces in Restraining Members in Braced Frames Consideration of Partial Column Base Fixity Inelastic K-factor 17.6 Framed Columns Alternative Methods LeMessurier Method Lui Method Remarks 17.7 Unbraced Frames With Leaning Columns Rigid Columns Leaning Columns Remarks 17.8 Cross Bracing Systems 17.9 Latticed and Built-Up Members Laced Columns Columns with Battens Laced-Battened Columns Columns with Perforated Cover Plates Built-Up Members with Bolted and Welded Connectors 17.10Tapered Columns 17.11Crane Columns 17.12Columns in Gable Frames 17.13Summary 17.14Defining Terms References Further Reading. 17.1 Introduction The concept of the effective length factors of columns has been well established and widely used by practicing engineers and plays an important role in compression member design. The most structural design codes and specifications have provisions concerning the effective length factor. The aim of this chapter is to present a state-of-the-art engineering practice of the effective length factor for the design of columns in structures. In the first part of this chapter the basic concept of the effective length 1999 by CRC Press LLC factor is discussed. And then the design implementation for isolated .