Collapse fragility curves of RC piers with corroded rebars

IF 4.1 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Bulletin of Earthquake Engineering Pub Date : 2025-06-24 DOI:10.1007/s10518-025-02202-0

Giuseppe Perrone, Donatello Cardone, Vito Possidente

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引用次数: 0

Abstract

Ageing and deterioration of Reinforced Concrete (RC) bridges can significantly increase their seismic vulnerability and have a significant impact on expected economic losses. In this study, the seismic performance of typical single-shaft piers with corroded rebars is examined through extensive Multi-Stripe non-linear response time-history Analyses (MSA). Piers with different cross sections and heights, featuring different deterioration scenarios, characterized by different corrosion patterns and severity levels of corrosion, are investigated. MSA are performed using twenty pairs of ground motion records consistent with the seismic hazard of the cities of L’Aquila (central Italy) and Naples (southern Italy), for nine different earthquake intensity levels with return periods ranging from 50 to 100.000 years. Lognormal fragility curves associated with pier collapse are derived to account for record-to-record variability. Finally, the annual failure rates associated with collapse are derived to evaluate the structural reliability of each model both in the as-built and deteriorated conditions.

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钢筋腐蚀钢筋混凝土桥墩的崩塌易损性曲线

钢筋混凝土（RC）桥梁的老化和劣化会显著增加其地震易损性，并对预期的经济损失产生重大影响。在这项研究中，通过广泛的多条纹非线性响应时程分析（MSA），研究了典型的带有腐蚀钢筋的单轴墩的抗震性能。以不同截面和高度的桥墩为研究对象，研究了不同腐蚀模式和腐蚀严重程度下桥墩的腐蚀状况。MSA使用了20对与拉奎拉（意大利中部）和那不勒斯（意大利南部）等城市的地震危险性相一致的地面运动记录，用于9个不同的地震强度级别，返回周期从50年到10万年不等。导出了与桥墩倒塌相关的对数正态脆弱性曲线，以说明记录到记录的可变性。最后，导出了与倒塌相关的年故障率，以评估每个模型在建成和恶化条件下的结构可靠性。

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来源期刊

Bulletin of Earthquake Engineering 工程技术-地球科学综合

CiteScore

8.90

自引率

19.60%

发文量

263

审稿时长

7.5 months

期刊介绍： Bulletin of Earthquake Engineering presents original, peer-reviewed papers on research related to the broad spectrum of earthquake engineering. The journal offers a forum for presentation and discussion of such matters as European damaging earthquakes, new developments in earthquake regulations, and national policies applied after major seismic events, including strengthening of existing buildings. Coverage includes seismic hazard studies and methods for mitigation of risk; earthquake source mechanism and strong motion characterization and their use for engineering applications; geological and geotechnical site conditions under earthquake excitations; cyclic behavior of soils; analysis and design of earth structures and foundations under seismic conditions; zonation and microzonation methodologies; earthquake scenarios and vulnerability assessments; earthquake codes and improvements, and much more. This is the Official Publication of the European Association for Earthquake Engineering.