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Basic Theory of Plates and Elastic Stability - Part 29

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 - Welded Tubular Connections—CHS Trusses | Marshall P.W. Welded Tubular Connections CHS Trusses Structural Engineering Handbook Ed. Chen Wai-Fah Boca Raton CRC Press LLC 1999 Welded Tubular Connections CHS Trusses Peter W. Marshall MHP Systems Engineering Houston Texas 29.1 Introduction 29.2 Architecture 29.3 Characteristics of Tubular Connections 29.4 Nomenclature 29.5 Failure Modes Local Failure General Collapse Unzipping or Progressive Failure Materials Problems Fatigue 29.6 Reserve Strength 29.7 Empirical Formulations 29.8 Design Charts Joint Efficiency Derating Factor 29.9 Application 29.10Summary and Conclusions References 29.1 Introduction Truss connections in circular hollow sections CHS present unique design challenges. This chapter discusses the following elements of the subject Architecture Characteristics of Tubular Connections Nomenclature Failure Modes Reserve Strength Empirical Formulations Design Charts Application and Summary and Conclusions. 29.2 Architecture Architecture is defined as the art and science of designing and successfully executing structures in accordance with aesthetic considerations and the laws of physics as well as practical and material considerations. Where tubular structures are exposed for dramatic effect it is often disappointing to see grand concepts fail in execution due to problems in the structural connections of tubes. Such failures range from awkward ugly detailing to learning curve problems during fabrication to excessive deflections or even collapse. Such failures are unnecessary as the art and science of welded tubular connections has been codified in the AWS Structural Welding Code 1 . A well-engineered structure requires that a number of factors be in reasonable balance. Factors to be considered in relation to economics and risk in the design of welded tubular structures and their connections include 1 static strength 2 fatigue resistance 3 fracture control and 4 weldability. 1999 by CRC Press LLC Static strength considerations are so important that they .