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Numerical Investigation on Progressive Collapse Mitigation of Steel Beam-Column Joint Using Steel Plates.

Mohammed Alrubaidi¹, S A Alhammadi²

¹Department of Civil Engineering, King Saud University, Riyadh 11451, Saudi Arabia.

Materials (Basel, Switzerland)

|November 11, 2022

Summary

This study enhanced steel beam-column joints to prevent progressive collapse. Strengthening techniques significantly increased peak load capacity, with A572 steel plates showing a 30% improvement and mitigating collapse risks.

Keywords:

progressive collapse shear joint strengthening techniques upgrading

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Area of Science:

Structural Engineering
Materials Science

Background:

Progressive collapse is a critical failure mode in steel structures.
Beam-column joints are vulnerable points in moment-resisting frames.
Existing joints may not withstand extreme seismic events.

Purpose of the Study:

To investigate methods for strengthening steel beam-column joints.
To determine the structural issues critical to preventing collapse spread.
To verify numerical models with experimental data.

Main Methods:

Extensive numerical analyses using ABAQUS software.
Experimental testing of three scaled steel beam-column joint assemblies (control, reference, strengthened).
Development of 17 finite element models with varying parameters (plate thickness, steel grade, welding).

Main Results:

Strengthened joints showed increased peak load capacity.
A572 steel plates increased peak load by 30%.
All strengthened specimens exhibited catenary action, preventing progressive collapse.

Conclusions:

Welded side plate strengthening is effective for steel beam-column joints.
The study provides valuable data for seismic design and retrofitting.
Strengthened joints enhance structural resilience against progressive collapse.