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An Integrated Sensitivity and Uncertainty Quantification of Fragility Functions in RC Frames

Author

Listed:
  • Kourosh Nasrollahzadeh

    (Department of Civil Engineering, K.N. Toosi University of Technology, Tehran 19697, Iran)

  • Mohammad Amin Hariri-Ardebili

    (Department of Civil Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309, USA
    College of Computer, Mathematical and Natural Sciences, University of Maryland, College Park, MD 20742, USA)

  • Houman Kiani

    (Department of Civil Engineering, K.N. Toosi University of Technology, Tehran 19697, Iran)

  • Golsa Mahdavi

    (Department of Civil Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309, USA)

Abstract

Uncertainty quantification is a challenging task in the risk-based assessment of buildings. This paper aims to compare reliability-based approaches to simulating epistemic and aleatory randomness in reinforced concrete (RC) frames. Ground motion record-to-record variability is combined with modeling uncertainty which is propagated by either an approximate first-order second-moment or Latin Hypercube sampling methods. The sources of uncertainties include post-yield hardening stiffness, cyclic energy dissipation capacity, and the plastic and post-cap rotation capacities of beam-column elements. All nonlinear simulations are performed with two methods: detailed incremental dynamic analysis, and the simplified SPO2IDA. The combination of all parametric methods is used to analyze two RC frames (four-story and eight-story), and the results are further post-processed to drive fragility functions. Several assumptions were investigated in curve fitting, functional form, uncertainty, and confidence intervals. The results indicate the importance of modeling uncertainty in higher seismic intensity levels. While there is a negligible difference in fragility curve fitting, its variability due to optimal intensity measure parameters is dominant.

Suggested Citation

  • Kourosh Nasrollahzadeh & Mohammad Amin Hariri-Ardebili & Houman Kiani & Golsa Mahdavi, 2022. "An Integrated Sensitivity and Uncertainty Quantification of Fragility Functions in RC Frames," Sustainability, MDPI, vol. 14(20), pages 1-34, October.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:20:p:13082-:d:940410
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    Cited by:

    1. Mohammad Amin Molod & Franz-Joseph Barthold & Panagiotis Spyridis, 2023. "Minimally Invasive Retrofitting of RC Joints with Externally Applied SMA Plate—Adaptive Design Optimisation through Probabilistic Damage Simulation," Sustainability, MDPI, vol. 15(4), pages 1-25, February.

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