Analysis of Steel Connections to Resist Progressive Collapse

Yanglin Gong,Chen Zhang,Jian Deng

doi:10.4236/wjet.2019.72b002

Abstract

This paper presented a methodology for the analysis and design of steel connections under a double-span connection within the context of preventing progressive collapse. First, various connection models were described and their pros and cons were provided. Then, the load-displacement characteristics of a component-based spring model were described. Thirdly, an experi-mental study on the behaviors of shear tab connections under tension was presented. The main sources of the deformation capacity of the shear tab connections were identified. Finally, a design example of a shear tab connection was provided to illustrate the methodology.

Highlights

Progressive collapse is referred to a localized failure, due to an unexpected event such as an accidental blast, causes the failure of adjoining structural elements, which in turn spread further resulting in the collapse of the entire structure or a disproportionally large part of it
This paper presented a methodology for the analysis and design of steel connections under a double-span connection within the context of preventing progressive collapse
The beam-to-column shear connections are the weakest link of a floor system to bridge are moved column known as a double-span scenario

Summary

Introduction

Progressive collapse is referred to a localized failure, due to an unexpected event such as an accidental blast, causes the failure of adjoining structural elements, which in turn spread further resulting in the collapse of the entire structure or a disproportionally large part of it. A recent Canadian standard [2] reflected many new developments in this field Both direct and indirect approaches to resist progressive collapse have been outlined in these guidelines with various levels of details and effectiveness. In this methodology, a building is mainly subjected to service gravitational loads while one of the columns is assumed to be removed (Figure 1). An analysis and design example is given on a shear tab connection under the removal of a middle column

Analytical Models of a Steel Connection

Component-Based Connection Model

Component Spring Model

Shear Tab Connections

Analysis Example of a Shear Tab Connection

Summary and Conclusions