偏心压缩下腐蚀圆钢管的稳定性能

IF 7.4 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Construction and Building Materials Pub Date : 2024-11-15 DOI:10.1016/j.conbuildmat.2024.139157

Zhengyi Kong , Bo Yang , Xiaofei Wang , Cuiqiang Shi , Rui Li , Ningning Hu , Qinglin Tao , George Vasdravellis , Quang-Viet Vu

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引用次数: 0

摘要

本研究探讨了腐蚀圆钢管（CST）在偏心压缩下的稳定性行为。利用加速腐蚀试验获得了 12 根不同腐蚀程度的 CST，然后应用三维扫描技术分析了 CST 构件的表面腐蚀特征。对 CST 构件进行偏心压缩试验，以评估腐蚀对稳定性行为的影响。基于三维反向重建方法和表面腐蚀特征，开发了一种具有腐蚀特征的有限元（FE）方法，用于预测腐蚀 CST 的屈曲响应。腐蚀削弱了 Q345B 钢的机械性能，使应力-应变曲线的屈服平台逐渐缩短或消失。当腐蚀率达到 21.47 % 时，CST 构件的极限荷载和局部屈曲荷载分别下降了 44.99 % 和 43.44 %。均匀腐蚀主要影响 CST 构件的承载能力 (BCP)，而 CST 的失效模式则主要受局部腐蚀的影响。现行规范没有考虑局部腐蚀的影响，因此在偏心压缩条件下计算腐蚀 CST 的承载能力不准确。我们在现行规范的基础上修改了一个新公式，以准确预测 CST 构件腐蚀后的 BCP。

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Stability performance of corroded circular steel tube under eccentric compression

This study examines the stability behavior of corroded circular steel tubes (CST) under eccentric compression. Accelerated corrosion testing is utilized to obtain 12 CST with different corrosion degree, and 3D scanning technology is then applied to analyze the surface corrosion characteristics of the CST members. Eccentric compression tests are performed on the CST members to assess the impact of corrosion on the stability behavior. A finite element (FE) method with corrosion characteristics, based on the 3D reverse reconstructed method and surface corrosion characteristics, is developed for the prediction of buckling response of corroded CST. Corrosion weakens the mechanical properties of Q345B steel, progressively shortening or eliminating the yield plateau of stress-strain curves. When the corrosion rate reaches 21.47 %, the ultimate load and local buckling load of the CST members drop by 44.99 % and 43.44 %, respectively. Uniform corrosion primarily affects the bearing capacity (BCP) of CST members, while the failure mode of CST is significantly influenced by local corrosion. Current specifications are inaccuracy for the BCP of corroded CST under eccentric compression as they do not consider the impact of local corrosion. A new formula modified from current specification is developed to accurately predict the BCP of CST members after corrosion.

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来源期刊

Construction and Building Materials 工程技术-材料科学：综合

CiteScore

13.80

自引率

21.60%

发文量

3632

审稿时长

82 days

期刊介绍： Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged. Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.