Analysis of single-span and multi-span continuous steel purlin beams reinforced with prestressed CFRP laminates

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-03-20 DOI:10.1016/j.tws.2025.113217

Xu Liang , Lili Hu , Yunhao Wang , TianQiao Liu , Yang Hua

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引用次数: 0

Abstract

Single-span and multi-span steel purlin beams reinforced with prestressed carbon fiber reinforced polymer (CFRP) laminates exhibit intricate flexural behavior. To better understand their performance, a comprehensive analysis was carried out. Firstly, a refined finite element model (FEM) of a reinforced single-span beam subjected to four-point bending was established and validated against previous experimental results, which showed good congruence with the findings. A parametrical analysis was then conducted on this beam to determine the influence of initial and final support length, the length of CFRP laminate reinforced section, tensile stiffness of CFRP laminate, flexural stiffness of purlin component, and initial imperfections on reinforcing efficiency. An analysis of variance was performed to identify the sensitivity of reinforcing parameters. The reverse camber effect of reinforced multi-span continuous purlin beams was investigated under various conditions, including different connection types between purlin beams, varying reinforcement scenarios, differences in CFRP laminate prestress between adjacent spans, and the length of CFRP laminate reinforced section. Furthermore, the effect of the differences in CFRP laminate prestress between adjacent spans on the flexural capacity and initial stiffness of purlin beams was further studied. Finally, design recommendations were provided for reinforced purlin beams based on the numerical results.

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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.