GFRP – sea water sea sand coral concrete – high strength steel composite column: Concept and axial compressive behavior

IF 5.7 1区工程技术 Q1 ENGINEERING, CIVIL

Thin-Walled Structures Pub Date : 2025-05-23 DOI:10.1016/j.tws.2025.113487

F.M. Ren , C.L. Lai , J.C.M. Ho , J. Cui , S.Y. Tian , R.Y. Zeng , M.H. Lai

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引用次数: 0

Abstract

An innovative glass fiber-reinforced polymer (GFRP) - sea water sea sand coral concrete (SSCC) - high strength steel (HSS) composite column has been proposed, offering excellent corrosion resistance, the use of locally sourced raw materials and superior mechanical performance. Eleven columns have been designed and tested under axial compression. The effect of GFRP layers and filament winding angle of GFRP tube, HSS thickness and concrete mix proportion on the axial compressive behavior of the newly-developed composite column has been investigated. Test results indicated that the composite column exhibited superior strength and deformation capacity. Besides, using silica fume to replace partial cement could improve the material performance of SSCC and also the stiffness and strength of the composite column. Moreover, larger layer and filament winding angle of GFRP could enhance the overall behavior of the composite column. The strength of the columns exceeded 1.7 times of the squash load, i.e., the sum of the load carried by GFRP tube, SSCC and HSS, showing significant confinement effect. Considering the effect of coral aggregate and filament winding angle, equations predicting the load-carrying capacity for the composite columns were proposed. By comparing the predicted and experimental results, the validity of the proposed equations was confirmed.

查看原文本刊更多论文

GFRP -海水海砂珊瑚混凝土-高强钢复合柱：概念及轴压性能

提出了一种创新的玻璃纤维增强聚合物(GFRP) -海水海砂珊瑚混凝土(SSCC) -高强度钢（HSS）复合柱，具有优异的耐腐蚀性，使用当地采购的原材料和卓越的机械性能。设计并试验了11根轴压柱。研究了玻璃钢层数、玻璃钢管缠绕角、高速钢厚度和混凝土配合比对新型复合柱轴压性能的影响。试验结果表明，该复合柱具有较好的强度和变形能力。此外，用硅灰代替部分水泥可以改善SSCC的材料性能，提高复合柱的刚度和强度。此外，较大的GFRP层数和缠绕角可以提高复合材料柱的整体性能。柱的强度超过挤压荷载（GFRP筒、SSCC和HSS所受荷载总和）的1.7倍，表现出明显的约束效应。考虑珊瑚骨料和纤维缠绕角的影响，建立了复合柱承载能力的预测方程。通过对预测结果和实验结果的比较，验证了所提方程的有效性。

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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.