Reliability-based life-cycle cost seismic design optimization of coastal bridge piers with nonuniform corrosion using different materials

IF 2.6 2区工程技术 Q2 ENGINEERING, CIVIL

Earthquake Engineering and Engineering Vibration Pub Date : 2024-01-01 DOI:10.1007/s11803-024-2234-z

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引用次数: 0

Abstract

Reinforcement corrosion is the main cause of performance deterioration of reinforced concrete (RC) structures. Limited research has been performed to investigate the life-cycle cost (LCC) of coastal bridge piers with nonuniform corrosion using different materials. In this study, a reliability-based design optimization (RBDO) procedure is improved for the design of coastal bridge piers using six groups of commonly used materials, i.e., normal performance concrete (NPC) with black steel (BS) rebar, high strength steel (HSS) rebar, epoxy coated (EC) rebar, and stainless steel (SS) rebar (named NPC-BS, NPC-HSS, NPC-EC, and NPC-SS, respectively), NPC with BS with silane soakage on the pier surface (named NPC-Silane), and high-performance concrete (HPC) with BS rebar (named HPC-BS). First, the RBDO procedure is improved for the design optimization of coastal bridge piers, and a bridge is selected to illustrate the procedure. Then, reliability analysis of the pier designed with each group of materials is carried out to obtain the time-dependent reliability in terms of the ultimate and serviceability performances. Next, the repair time of the pier is predicted based on the time-dependent reliability indices. Finally, the time-dependent LCCs for the pier are obtained for the selection of the optimal design.

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使用不同材料对腐蚀不均匀的沿海桥墩进行基于可靠性的寿命周期成本抗震设计优化

摘要钢筋腐蚀是钢筋混凝土（RC）结构性能下降的主要原因。对使用不同材料的非均匀腐蚀沿海桥墩的生命周期成本（LCC）进行的研究有限。本研究改进了基于可靠性的优化设计（RBDO）程序，用于使用六组常用材料设计沿海桥墩，即普通性能混凝土（NPC）与黑色钢筋（BS）、高强度钢筋（HSS）、环氧树脂涂层钢筋（EC）和不锈钢钢筋（SS）（分别命名为 NPC-BS、NPC-HSS、NPC-EC 和 NPC-SS），NPC 与桥墩表面硅烷浸泡 BS（命名为 NPC-硅烷），以及高性能混凝土（HPC）与 BS 钢筋（命名为 HPC-BS）。首先，改进了 RBDO 程序，用于沿海桥梁桥墩的优化设计，并选择了一座桥梁来说明该程序。然后，对采用各组材料设计的桥墩进行可靠性分析，以获得与时间相关的极限可靠性和适用性可靠性。然后，根据随时间变化的可靠性指数预测桥墩的维修时间。最后，得出桥墩的随时间变化的 LCC，以便选择最佳设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Earthquake Engineering and Engineering Vibration 工程技术-工程：地质

CiteScore

4.70

自引率

21.40%

发文量

1057

审稿时长

9 months

期刊介绍： Earthquake Engineering and Engineering Vibration is an international journal sponsored by the Institute of Engineering Mechanics (IEM), China Earthquake Administration in cooperation with the Multidisciplinary Center for Earthquake Engineering Research (MCEER), and State University of New York at Buffalo. It promotes scientific exchange between Chinese and foreign scientists and engineers, to improve the theory and practice of earthquake hazards mitigation, preparedness, and recovery. The journal focuses on earthquake engineering in all aspects, including seismology, tsunamis, ground motion characteristics, soil and foundation dynamics, wave propagation, probabilistic and deterministic methods of dynamic analysis, behavior of structures, and methods for earthquake resistant design and retrofit of structures that are germane to practicing engineers. It includes seismic code requirements, as well as supplemental energy dissipation, base isolation, and structural control.