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Numerical analysis and design methodology for steel frames with fuse system.

Xiaotong Peng¹, Zhen Wang^2,3, Chen Lin⁴

¹School of Civil Engineering and Architecture, University of Jinan, Shizhong, 250022, Jinan, China.

Scientific Reports

|April 16, 2025

Summary

This study models steel frame structures with fuse systems to enhance seismic performance. Optimized Reduced Beam Section (RBS) geometry and fuse placement significantly improve structural response and energy dissipation.

Keywords:

Design methodology Finite element simulation Pushover analysis RBS connection Seismic performance Steel frame with fuse system

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Area of Science:

Structural Engineering
Earthquake Engineering
Materials Science

Background:

Steel frame structures are critical for seismic resilience.
Integrating energy dissipation systems enhances structural safety during earthquakes.
Fuse systems offer a mechanism for controlled energy absorption.

Purpose of the Study:

To investigate the seismic performance of steel frame structures with integrated fuse systems.
To analyze the impact of Reduced Beam Section (RBS) geometry on seismic response.
To develop analytical methods for predicting structural behavior.

Main Methods:

Finite element analysis using ABAQUS software to model the fuse system.
Pushover analysis to evaluate structural performance under seismic loads.
Application of the principle of virtual work for analytical calculations.

Main Results:

Optimized RBS geometry (0.65b_f, 0.65h_b, 0.2b_f) is recommended for improved seismic performance.
Fuse system placement at the side span is more effective than central placement.
Using lower-grade steel for RBS connection beams promotes earlier yielding of the fuse system.
Analytical formulas for lateral stiffness and ultimate load capacity show <10% error compared to FEA.

Conclusions:

The study provides a validated model for assessing steel frame structures with fuse systems.
Specific design recommendations for RBS geometry and fuse system layout are established.
The analytical method offers a reliable and efficient tool for structural design and analysis.