Performance evaluation of marine circular reinforced concrete columns subjected to combined corrosion and compressive load

IF 4.3 2区 工程技术 Q1 ENGINEERING, OCEAN
Yu Jiang, Hua-Peng Chen, Wen-Bin Li
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引用次数: 0

Abstract

This paper presents an effective approach for quantitatively assessing the structural performance of the corroded reinforced concrete (RC) columns with a circular cross-section in aggressive marine environments. Firstly, the material damage and structural strength deterioration models are constructed by analyzing the degradation mechanisms of the materials due to rebar corrosion. The general method for calculating the load-bearing capacity of the circular RC columns at various corrosion levels with different loading conditions is proposed, based on the assumptions of the equivalent steel ring and the rectangular stress block of the concrete. In order to improve computational efficiency, a simplified method is then developed by introducing a linear relation to replace the complex expression of the load-bearing capacity coefficients of rebar in the general method. Finally, a numerical example is employed to investigate the effect of design parameters on the load-bearing capacity and performance deterioration rate of the corroded RC columns, and the effectiveness of the proposed simplified method is examined. The obtained results show that the corrosion level, loading condition and design parameters have a significant impact on the residual load-bearing capacity of the circular RC columns, and the simplified method with the introduced linear expression can be used for the preliminary assessment of the residual resistance of the corroded circular RC columns.

承受腐蚀和压缩联合荷载的船用圆形钢筋混凝土柱的性能评估
本文提出了一种定量评估腐蚀性海洋环境中圆形截面钢筋混凝土(RC)柱结构性能的有效方法。首先,通过分析钢筋锈蚀导致材料退化的机理,构建了材料损伤和结构强度劣化模型。基于等效钢环和混凝土矩形应力块的假设,提出了计算不同腐蚀程度、不同加载条件下圆形钢筋混凝土柱承载力的一般方法。然后,为了提高计算效率,通过引入线性关系来替代一般方法中钢筋承载力系数的复杂表达式,开发了一种简化方法。最后,利用一个数值实例研究了设计参数对腐蚀 RC 柱承载能力和性能劣化率的影响,并检验了所提出的简化方法的有效性。结果表明,腐蚀程度、加载条件和设计参数对圆形 RC 柱的残余承载力有显著影响,引入线性表达式的简化方法可用于腐蚀圆形 RC 柱残余抗力的初步评估。
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
Applied Ocean Research
Applied Ocean Research 地学-工程:大洋
CiteScore
8.70
自引率
7.00%
发文量
316
审稿时长
59 days
期刊介绍: The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.
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