Finite Element Simulations of the CFRP Retrofitted Hollow Square Columns

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2022-05-31 DOI:10.56748/ejse.2229701

M.W. Falah, Z. Al-khafaji, R. Yaseen, D.F. Yousif, K.A. Hamza, S.S. Radhi

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Abstract

ABSTRACT This article describes the finite element analysis of concrete columns with a hollow square reinforced which restricted with a square Carbon-Fiber-Reinforced polymer (CFRP) tube. In this study, about sixteen square hollow core columns were investigated. These columns were classified into four sets. The set number one was the reference set which involved four unconfined reinforced columns with traditional steel helices and longitudinal steel bars. The columns of the 2nd category have a similar configuration as the set number one except that these columns were restricted outwardly by the CFRP tube. The columns of the set number were restricted outwardly by a CFRP tube and restricted inwardly by a steel tube. Finally, the columns of the 4th category do not have a steel reinforcement where they produced with only an outer CFRP tube and an inner steel tube. These columns were exposed to various loading conditions: concentric, eccentric (22 and 44) mm, and four bendings' points. It was investigated that the CFRP tube confinement faintly improved the columns’ strength. Moreover, the use of a steel tube as inner confinement in the columns with a hollow section led to improve the structural performance and ductility.

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CFRP加固空心方柱的有限元模拟

摘要本文介绍了用方形碳纤维增强聚合物(CFRP)管约束的空心方筋混凝土柱的有限元分析。在这项研究中，研究了大约16个方形空心芯柱。这些列被分为四组。第一组是参考组，包括四个无约束的钢筋柱，带有传统的钢螺旋和纵向钢筋。第二类柱的结构与第一类柱相似，只是这些柱被CFRP管向外限制。设定数量的柱由CFRP管向外限制，由钢管向内限制。最后，第4类柱没有钢筋，只有一个外部碳纤维增强塑料管和一个内部钢管。这些柱暴露在不同的荷载条件下:同心，偏心(22和44)毫米，以及四个弯曲点。研究了碳纤维布筒约束对柱的强度有微弱的提高。此外，在空心截面柱中使用钢管作为内约束，提高了结构性能和延性。

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

Electronic Journal of Structural Engineering Engineering-Civil and Structural Engineering

CiteScore

1.10

自引率

16.70%

发文量

期刊介绍： The Electronic Journal of Structural Engineering (EJSE) is an international forum for the dissemination and discussion of leading edge research and practical applications in Structural Engineering. It comprises peer-reviewed technical papers, discussions and comments, and also news about conferences, workshops etc. in Structural Engineering. Original papers are invited from individuals involved in the field of structural engineering and construction. The areas of special interests include the following, but are not limited to: Analytical and design methods Bridges and High-rise Buildings Case studies and failure investigation Innovations in design and new technology New Construction Materials Performance of Structures Prefabrication Technology Repairs, Strengthening, and Maintenance Stability and Scaffolding Engineering Soil-structure interaction Standards and Codes of Practice Structural and solid mechanics Structural Safety and Reliability Testing Technologies Vibration, impact and structural dynamics Wind and earthquake engineering. EJSE is seeking original papers (research or state-of the art reviews) of the highest quality for consideration for publication. The papers will be published within 3 to 6 months. The papers are expected to make a significant contribution to the research and development activities of the academic and professional engineering community.