A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Fragility framework for corroded steel moment-resisting frame buildings subjected to mainshock-aftershock sequences
https://orcid.org/0000-0002-1889-8256
https://orcid.org/0000-0001-6468-3654
Abstract This study proposes a framework for the seismic fragility assessment of steel moment-resisting frames exposed to different rates of corrosion and subjected to real mainshock-aftershock (MS-AS) sequences. The inherent uncertainties in the structural characteristics may significantly affect the structural performance. Thus, in addition to the demand parameters, the framework considers randomness in the capacity parameters using the Latin hypercube sampling. Three frames are modeled in OpenSees and then subjected to nine real as-recorded MS-AS sequences to illustrate the application of the framework. Four limit states are defined based on the maximum interstory drift ratio and the multiple stripe analysis is chosen for the fragility assessment. The presented framework allows for the plot of the fragility surfaces for each corrosion level conditioned on both the mainshock and the aftershock intensity. The results indicate that corrosion and aftershock may significantly affect the seismic fragility especially for the extreme limit states.
Highlights Proposes a novel fragility framework for steel frames subjected to corrosion and real mainshock-aftershock sequences. Evaluates the corrosion vulnerability based on the lifetime of the building rather than corrosion percentages. Supports not only demand-driven random variables but also capacity-driven random variables. Develops MS-AS fragility surfaces to reflect the characteristics of MS-AS sequences. Compares the fragility surfaces for low-, medium-, and high-rise steel moment-resisting frame buildings.
Fragility framework for corroded steel moment-resisting frame buildings subjected to mainshock-aftershock sequences
https://orcid.org/0000-0002-1889-8256
https://orcid.org/0000-0001-6468-3654
Abstract This study proposes a framework for the seismic fragility assessment of steel moment-resisting frames exposed to different rates of corrosion and subjected to real mainshock-aftershock (MS-AS) sequences. The inherent uncertainties in the structural characteristics may significantly affect the structural performance. Thus, in addition to the demand parameters, the framework considers randomness in the capacity parameters using the Latin hypercube sampling. Three frames are modeled in OpenSees and then subjected to nine real as-recorded MS-AS sequences to illustrate the application of the framework. Four limit states are defined based on the maximum interstory drift ratio and the multiple stripe analysis is chosen for the fragility assessment. The presented framework allows for the plot of the fragility surfaces for each corrosion level conditioned on both the mainshock and the aftershock intensity. The results indicate that corrosion and aftershock may significantly affect the seismic fragility especially for the extreme limit states.
Highlights Proposes a novel fragility framework for steel frames subjected to corrosion and real mainshock-aftershock sequences. Evaluates the corrosion vulnerability based on the lifetime of the building rather than corrosion percentages. Supports not only demand-driven random variables but also capacity-driven random variables. Develops MS-AS fragility surfaces to reflect the characteristics of MS-AS sequences. Compares the fragility surfaces for low-, medium-, and high-rise steel moment-resisting frame buildings.
Fragility framework for corroded steel moment-resisting frame buildings subjected to mainshock-aftershock sequences
https://orcid.org/0000-0002-1889-8256
https://orcid.org/0000-0001-6468-3654
Abstract This study proposes a framework for the seismic fragility assessment of steel moment-resisting frames exposed to different rates of corrosion and subjected to real mainshock-aftershock (MS-AS) sequences. The inherent uncertainties in the structural characteristics may significantly affect the structural performance. Thus, in addition to the demand parameters, the framework considers randomness in the capacity parameters using the Latin hypercube sampling. Three frames are modeled in OpenSees and then subjected to nine real as-recorded MS-AS sequences to illustrate the application of the framework. Four limit states are defined based on the maximum interstory drift ratio and the multiple stripe analysis is chosen for the fragility assessment. The presented framework allows for the plot of the fragility surfaces for each corrosion level conditioned on both the mainshock and the aftershock intensity. The results indicate that corrosion and aftershock may significantly affect the seismic fragility especially for the extreme limit states.
Highlights Proposes a novel fragility framework for steel frames subjected to corrosion and real mainshock-aftershock sequences. Evaluates the corrosion vulnerability based on the lifetime of the building rather than corrosion percentages. Supports not only demand-driven random variables but also capacity-driven random variables. Develops MS-AS fragility surfaces to reflect the characteristics of MS-AS sequences. Compares the fragility surfaces for low-, medium-, and high-rise steel moment-resisting frame buildings.
Fragility framework for corroded steel moment-resisting frame buildings subjected to mainshock-aftershock sequences
Saed, Ghazal (author) / Balomenos, Georgios P. (author)
2023-04-12
Article (Journal)
Electronic Resource
English
Collapse Fragility of Steel Structures Subjected to Earthquake Mainshock-Aftershock Sequences
| British Library Online Contents | 2014