Strengthening of circular austenitic stainless steel tubular columns with CFRP under eccentric loading: Experimental and numerical investigations

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-29 DOI:10.1016/j.tws.2025.113256

Galal M. Al-Mekhlafi , Mohammed A. Al-Huri , Abdelrahman El-Tohfa , Mohammed A. Al-Osta , Ahmed H. Alwathaf

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引用次数: 0

Abstract

This study investigates the structural behavior of CFRP-wrapped circular stainless-steel tubular (CSST) columns subjected to combined axial compression and bending loads. Eighteen cold-formed stainless steel tubular specimens with varying diameter-to-thickness ratios, CFRP wrapping configurations, and load eccentricities were tested experimentally. Results reveal that CFRP wrapping significantly enhances the load-bearing capacity and ductility of CSST columns by mitigating local buckling and delaying failure. Finite element models were developed and validated using ABAQUS software to complement experimental findings. A comprehensive parametric study explored additional factors influencing structural behavior. Based on the combined experimental and numerical results, a design model was proposed by incorporating the effect of CFRP wrapping into the Continuous Strength Method (CSM) framework. The proposed model demonstrated high accuracy in predicting failure loads and moments, offering a practical approach for the structural design of the strengthened CSST. This work advances the application of CFRP in enhancing the performance of structural stainless-steel components.

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来源期刊

Thin-Walled Structures 工程技术-工程：土木

CiteScore

9.60

自引率

20.30%

发文量

801

审稿时长

66 days

期刊介绍： Thin-walled structures comprises an important and growing proportion of engineering construction with areas of application becoming increasingly diverse, ranging from aircraft, bridges, ships and oil rigs to storage vessels, industrial buildings and warehouses. Many factors, including cost and weight economy, new materials and processes and the growth of powerful methods of analysis have contributed to this growth, and led to the need for a journal which concentrates specifically on structures in which problems arise due to the thinness of the walls. This field includes cold– formed sections, plate and shell structures, reinforced plastics structures and aluminium structures, and is of importance in many branches of engineering. The primary criterion for consideration of papers in Thin–Walled Structures is that they must be concerned with thin–walled structures or the basic problems inherent in thin–walled structures. Provided this criterion is satisfied no restriction is placed on the type of construction, material or field of application. Papers on theory, experiment, design, etc., are published and it is expected that many papers will contain aspects of all three.