Limit states design of semi-rigid frames using advanced analysis: Part 1: Connection modeling and classification

Abstract

This paper presents a method for modeling connection moment-rotation curves which are essential for proportioning two-dimensional semi-rigid steel frame structures analyzed based on a second-order inelastic analysis. Procedures for calculating the key parameters used to describe the moment-rotation curves of various types of angle connections are presented. Design aids are generated in which salient size parameters that affect the moment-rotation behavior of the connection can be identified. Two schemes by which connections can be classified in terms of strength, stiffness and rotation capacity are presented, and their design implications are discussed. Analysis and design methodologies are provided in Part 2, a companion paper in which the ultimate strength and serviceability limit state behavior of a semi-rigid frame example are studied using an advanced analysis. The aim of these two-part papers is to advance the use of second-order plastic hinge based analysis for proportioning two-dimensional semi-rigid frames without the need of separate specification equation checks. © 1993.