Nonlinear Analysis of a Steel Frame Structure Exposed to Post-Earthquake Fire
Abstract
:1. Introduction
2. State of the Art
3. Basis of the Analysis
3.1. Seismic Analysis for PEF
3.2. Input Data
3.3. Thermal Stress Analysis in PEF Analysis
4. Development of the Numerical Model
4.1. General
4.2. Elements, Meshing and Boundary Conditions
4.3. Loading and Solution Procedure
5. Results and Analysis
5.1. Frequency Analysis
5.2. Validation Study
5.3. Post-Earthquake Fire
6. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Model | Natural Vibration Period (sec), T | Damping Coefficients | |||||||
---|---|---|---|---|---|---|---|---|---|
FE Model | Code | ||||||||
Modes | EN 1998-1 | ||||||||
1 | 2 | 3 | 4 | 5 | 6 | ||||
Value | 0.36 | 0.296 | 0.106 | 0.101 | 0.09 | 0.081 | 0.16 | 0.959 | 0.0026 |
Case No. | Type of Analysis | Type of Excitation | Failure | Time Failure, Compared to Fire-Only Results | Type of Failure | |
---|---|---|---|---|---|---|
Time (sec) | Tem. (°C) | |||||
Fire-Only | Fire-Only | No excitation | 336 | 480 | - | Local/Symmetrical |
Case I | PEF | Unidirectional | 272 | 455 | −19% | Local/Asymmetrical |
Case II | PEF | Unidirectional | 277 | 455 | −18% | Local/Asymmetrical |
Case III | PEF | Bidirectional | 185 | 306 | −45% | Global/Asymmetrical |
Case IV | PEF | Bidirectional | 185 | 306 | −45% | Global/Asymmetrical |
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Alisawi, A.T.; Collins, P.E.F.; Cashell, K.A. Nonlinear Analysis of a Steel Frame Structure Exposed to Post-Earthquake Fire. Fire 2021, 4, 73. https://doi.org/10.3390/fire4040073
Alisawi AT, Collins PEF, Cashell KA. Nonlinear Analysis of a Steel Frame Structure Exposed to Post-Earthquake Fire. Fire. 2021; 4(4):73. https://doi.org/10.3390/fire4040073
Chicago/Turabian StyleAlisawi, Alaa T., Philip E. F. Collins, and Katherine A. Cashell. 2021. "Nonlinear Analysis of a Steel Frame Structure Exposed to Post-Earthquake Fire" Fire 4, no. 4: 73. https://doi.org/10.3390/fire4040073