Page 288 - Handbook of Structural Steel Connection Design and Details

Source: Handbook of Structural Steel Connection Design and Details

Chapter
4

Partially Restrained
Connections

Roberto T. Leon, P.E.

Professor, Georgia Institute of Technology,
Atlanta, GA

4.1 Introduction 273
4.2 Connection Classification 275
4.2.1 Connection stiffness 277
4.2.2 Connection strength 279
4.2.3 Connection ductility 279
4.2.4 Derivation of M-θ curves 281
θ
4.2.5 Analysis 282
4.3 Design of Bolted PR Connections 285
4.3.1 Column-welded–beam-bolted connections 288
4.3.2 Column-bolted–beam-bolted connections (T-stubs) 302
4.3.3 End-plate connections 313
4.3.4 Flexible PR connections 322
4.4 Considerations for Analysis of PR Frames 322
4.5 References 325

4.1 Introduction
The American Institute of Steel Construction (AISC) specification has
recognized semirigid (Type 3) or partially restrained (PR) construc-
tion since the 1940s (AISC, 1947). Because the design of Type 3/PR
connections is predicated on a set of forces obtained from an advanced
structural analysis that includes the connection deformation charac-
teristic and because few if any design texts address this issue, this
chapter will begin with an introductory discussion of PR connection
and its effect on frame behavior. Once these issues are understood,

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