Behaviour Of Reactive Powder Concrete Hollow Core Columns Strengthened With Carbon Fiber Reinforced Polymer Under Eccentric Loading

IF 0.8 Q4 ENGINEERING, CIVIL

Electronic Journal of Structural Engineering Pub Date : 2022-10-28 DOI:10.56748/ejse.223293

M. Falah, Z. Al-khafaji

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Abstract

The behavior of hollow-core columns composed of reactive powder concrete (RPC) contained by a circular carbon fiber reinforced polymer (CFRP) tube is investigated numerically in this work. This research used circular hollow core column samples with an outside diameter of 20.6 cm, an interior diameter of 9cm, and a height of 80cm. These examples have been created utilizing 116 MPa reactive powder concrete. Nine groupings of specimens were created. A control set of nine unconfined hollow columns with stirrups strengthened by 12mm longitudinal bars (HCRPC). Groups two through five have been produced up of RPC hollow column specimens with similar reinforcement but were externally confined with CFRP of 0.131, 0.262, 1.2, and 2.4mm thick (These thicknesses are commercially available (0.131 for CFRP one layer sheet, 0.262 for two layers of CFRP sheet; 1.2 for one layer of CFRP plate. And 2.4 for two-layer of CFRP plate) respectively, placed at mid-length of the columns. Sets six to nine, on the other hand, are identical to the previous sets, but the CFRP restriction has been put at both columns' ends. Axial load thru the column center and uniaxial loading with 2.5 and 5 cm eccentricities from the center were applied to all columns. According to the findings, CFRP confinement boosted the strength of HCRPC columns marginally.

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碳纤维增强聚合物加固活性粉末混凝土空心柱在偏心荷载作用下的性能

本文对碳纤维增强聚合物（CFRP）圆管内活性粉末混凝土（RPC）空心柱的受力性能进行了数值研究。本研究使用了外径20.6厘米、内径9厘米、高度80厘米的圆形空心柱样品。这些实例是利用116MPa的活性粉末混凝土制成的。创建了九组标本。一组由九根无侧限空心柱组成的控制组，箍筋由12mm纵向钢筋（HCRPC）加固。第二组至第五组由具有类似钢筋的RPC空心柱试件制成，但用0.131、0.262、1.2和2.4mm厚的CFRP进行外部约束（这些厚度可在市场上买到（CFRP单层片材为0.131，CFRP双层片材为0.262；CFRP一层板为1.2。CFRP双层板为2.4），放置在柱子的中间长度。另一方面，第六组到第九组与之前的组相同，但CFRP限制已设置在两个柱的末端。通过柱中心的轴向载荷和距中心偏心度为2.5和5cm的单轴载荷被施加到所有柱上。根据研究结果，CFRP约束略微提高了HCRPC柱的强度。

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.