EFFECTS OF CORROSION AND AFTERSHOCK ON STRUCTURAL DAMAGE AND FRAGILITY OF REINFORCED CONCRETE FRAME STRUCTURES

ZHOU Zhou; YU Xiao-hui; LYU Da-gang; HAN Miao

doi:10.6052/j.issn.1000-4750.2022.09.0813

Volume 40 Issue 9

Sep. 2023

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Article Navigation > Engineering Mechanics > 2023 > 40(9): 203-213, 256

ZHOU Zhou, YU Xiao-hui, LYU Da-gang, HAN Miao. EFFECTS OF CORROSION AND AFTERSHOCK ON STRUCTURAL DAMAGE AND FRAGILITY OF REINFORCED CONCRETE FRAME STRUCTURES[J]. Engineering Mechanics, 2023, 40(9): 203-213, 256. doi: 10.6052/j.issn.1000-4750.2022.09.0813

Citation:

ZHOU Zhou, YU Xiao-hui, LYU Da-gang, HAN Miao. EFFECTS OF CORROSION AND AFTERSHOCK ON STRUCTURAL DAMAGE AND FRAGILITY OF REINFORCED CONCRETE FRAME STRUCTURES[J]. Engineering Mechanics, 2023, 40(9): 203-213, 256. doi: 10.6052/j.issn.1000-4750.2022.09.0813

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EFFECTS OF CORROSION AND AFTERSHOCK ON STRUCTURAL DAMAGE AND FRAGILITY OF REINFORCED CONCRETE FRAME STRUCTURES

doi: 10.6052/j.issn.1000-4750.2022.09.0813

ZHOU Zhou^1
,,
YU Xiao-hui^{2
,
,},
LYU Da-gang^3
,,
HAN Miao^1
,

1.
Multi-Functional Shaking Tables Laboratory, Beijing University of Civil Engineering and Architecture, Beijing 100044, China
2.
College of Civil Engineering and Architecture, Guilin University of Technology, Guilin 541004, China
3.
Key Lab of Structure Dynamic Behavior and Control of China Ministry of Education, Harbin Institute of Technology, Harbin 150090, China

Received Date: 2022-09-19
Rev Recd Date: 2023-01-07

Available Online: 2023-07-15

Publish Date: 2023-09-06

Abstract

Abstract

To evaluate the effects of corrosion and aftershock on structural seismic resistance. Two seismic designed reinforced-concrete frame buildings located in a coastal city were selected for study. Four corrosion conditions were considered, i.e., uncorroded and corrosion ratios of 5%, 10% and 15%. A set of 662 mainshock-aftershock sequences were taken as the inputs for time history analysis. Then the damage analysis and fragility assessment were conducted to the corroded and uncorroded buildings subjected to mainshock-aftershock sequences. Results show that the increment of corrosion ratio exacerbates structural cumulative damage under mainshock-aftershock sequences. The increment ratio of the structural cumulative damage is even over 30%. The corrosion effect can lead to an increase in fragility curves, and the influence of the corrosion effect on mainshock fragility curves under heavy corrosion condition is close to that under aftershocks. The coupling effect of corrosion and aftershock can cause a significant elevating in mainshock fragility curve. Therefore, it is necessary to consider the effect of corrosion in seismic performance assessment subjected to mainshock-aftershock sequences.
- mainshock-aftershock sequences,
- corrosion effect,
- RC frame structure,
- structural damage analysis,
- fragility analysis

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References(34)

References

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