Optimal intensity measures for seismic fragility assessment of corrosion-damaged RC bridge piers

被引:2
作者
Asghshahr, Mohammadreza Seify [1 ]
Dizaj, Ebrahim Afsar [1 ,2 ]
Ghasemi, Arian [1 ]
机构
[1] Azarbaijan Shahid Madani Univ, Dept Civil Engn, Tabriz, Iran
[2] Univ Southampton, Fac Engn & Phys Sci, Southampton SO17 1BJ, England
关键词
Optimal intensity measure; Corrosion; Reinforced concrete; Bridge pier; Incremental dynamic analysis; Fragility; REINFORCED-CONCRETE BRIDGE; DEMAND MODELS; CAPACITY; MOTION;
D O I
10.1007/s10518-024-01974-1
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
This study aims to determine probabilistic seismic demand-based optimal intensity measures (IMs) for seismic fragility evaluation of corrosion-damaged reinforced concrete (RC) bridge piers. Toward this goal, a methodology is presented to select optimal IMs based on four criteria: efficiency, practicality, proficiency and sufficiency. Thirty-eight intensity measures in five categories of (i) acceleration-related, (ii) velocity-related, (iii) displacement-related, (iv) hybrid, and (v) general IMs are studied. The methodology is demonstrated in a case study of an RC bridge with various corrosion levels. The finite element model of a reference bridge pier is developed and verified by experimental results. Incremental dynamic analyses (IDAs) are carried out on the studied corrosion-damaged bridge piers using 22 ground motion records selected employing the conditional mean spectrum (CMS) methodology. The outcomes of IDAs are then used to develop linear probabilistic seismic demand models (PSDMs) for each bridge pier with varying corrosion damage. The obtained results show the high sensitivity of optimal IMs on the corrosion level of RC bridge piers. For instance, while the optimal IMs for the pristine bridge pier are sustained maximum acceleration (SMA) and effective peak acceleration (EPA), for the severely corroded pier peak ground acceleration (PGA) and acceleration level containing up to 95% of the Arias intensity (A95) are the most optimal IMs.
引用
收藏
页码:5673 / 5704
页数:32
相关论文
共 56 条
[1]   Seismic vulnerability assessment of ageing reinforced concrete structures under real mainshock-aftershock ground motions [J].
Afsar Dizaj, Ebrahim ;
Salami, Mohammad R. ;
Kashani, Mohammad M. .
STRUCTURE AND INFRASTRUCTURE ENGINEERING, 2022, 18 (12) :1674-1690
[2]  
[Anonymous], 1978, Tentative provisions fo r the development of seismic regulations for buildings: a cooperative effort with the design professions, building code interests, and the research community
[3]  
[Anonymous], 1988, Report No. EPRI NP-5930
[4]  
Arias A., 1970, Seismic Design for Nuclear Plants, P438
[5]   Sampling-based seismic reliability analysis of the corroded reinforced concrete bridge bent [J].
Asghshahr, Mohammadreza Seify .
STRUCTURES, 2022, 43 :944-958
[6]   Seismic fragility analysis of corroded reinforced concrete bridges in Bandar Abbas, Iran [J].
Asghshahr, Mohammadreza Seify ;
Rahai, Alireza .
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-BRIDGE ENGINEERING, 2022, 175 (04) :228-245
[7]   Seismic Assessment of Reinforced Concrete Bridge Under Chloride-Induced Corrosion [J].
Asghshahr, Mohammadreza Seify ;
Rahai, Alireza .
INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, 2018, 16 (6A) :681-693
[8]   An Improved Algorithm for Selecting Ground Motions to Match a Conditional Spectrum [J].
Baker, Jack W. ;
Lee, Cynthia .
JOURNAL OF EARTHQUAKE ENGINEERING, 2018, 22 (04) :708-723
[9]   Conditional Mean Spectrum: Tool for Ground-Motion Selection [J].
Baker, Jack W. .
JOURNAL OF STRUCTURAL ENGINEERING, 2011, 137 (03) :322-331
[10]   THE EFFECTIVE DURATION OF EARTHQUAKE STRONG MOTION [J].
Bommer, Julian J. ;
Martinez-Pereira, Alejandro .
JOURNAL OF EARTHQUAKE ENGINEERING, 1999, 3 (02) :127-172