Test, modeling and design of bolted-angle connections subjected to column removal

Abstract

This paper reports an experimental test of two types of bolted-angle beam-to-column connections under a double-span condition. The first type used web angles only, and the second type used both flange and web angles. The test results included failure modes, load-carrying capacity, and deformation versus loads. A mathematical model is proposed for the test setup based on a component-based spring model for the bolted-angles. A new compressive force versus deformation curve is proposed for the angle springs in addition to an existing tensile force versus deformation curve. The numerical results of the mathematical models are compared with the test results to gain insights of the behaviors of the bolted-angle connections. Finally, two design examples are provided to illustrate the strategies for obtaining a good robustness of angle connections subjected to a column removal.