Confinement properties of circular concrete columns wrapped with prefabricated textile-reinforced fine concrete shells

IF 2.9 3区工程技术 Q2 ENGINEERING, CIVIL Frontiers of Structural and Civil Engineering Pub Date : 2023-12-29 DOI:10.1007/s11709-023-0955-0

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Abstract

This paper proposes an innovative column composed of a core column (including both reinforced concrete (RC) and plain concrete (PC) columns) and a prefabricated textile-reinforced fine concrete (TRC) shell. To study the confinement properties of TRC shells on this novel type of concrete column, 20 circular specimens, including 12 PC columns and 8 RC columns, were prepared for axial compressive tests. Four key parameters, including the column size, reinforcing ratio of the carbon textile, concrete strength, and stirrup spacing, were evaluated. The results indicated that the compressive properties of the columns were improved by increasing the reinforcing ratio of the textile layers. In the case of TRC-confined PC columns, the maximum improvement in the peak load was 56.3%, and for TRC-confined RC columns, the maximum improvement was 60.2%. Based on the test results, an analytical model that can be used to calculate the stress–strain curves of prefabricated TRC shell-confined concrete columns has been proposed. The calculated curves predicted by the proposed model agreed well with the test results.

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用预制织物加固细石混凝土外壳包裹圆形混凝土柱的密闭性能

摘要本文提出了一种由核心柱（包括钢筋混凝土（RC）柱和素混凝土（PC）柱）和预制纺织加固细石混凝土（TRC）外壳组成的创新柱。为了研究 TRC 外壳对这种新型混凝土柱的约束性能，我们制备了 20 个圆形试件进行轴向抗压试验，其中包括 12 个 PC 柱和 8 个 RC 柱。试验评估了四个关键参数，包括柱子尺寸、碳纤维织物的配筋率、混凝土强度和箍筋间距。结果表明，通过增加纺织层的配筋率，柱子的抗压性能得到了改善。对于 TRC 加固 PC 柱，峰值荷载的最大改善幅度为 56.3%，而对于 TRC 加固 RC 柱，最大改善幅度为 60.2%。根据测试结果，我们提出了一个可用于计算预制 TRC 壳约束混凝土柱应力-应变曲线的分析模型。该模型预测的应力-应变曲线与试验结果吻合良好。

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来源期刊

Frontiers of Structural and Civil Engineering Engineering-Architecture

CiteScore

5.20

自引率

3.30%

发文量

734

期刊介绍： Frontiers of Structural and Civil Engineering is an international journal that publishes original research papers, review articles and case studies related to civil and structural engineering. Topics include but are not limited to the latest developments in building and bridge structures, geotechnical engineering, hydraulic engineering, coastal engineering, and transport engineering. Case studies that demonstrate the successful applications of cutting-edge research technologies are welcome. The journal also promotes and publishes interdisciplinary research and applications connecting civil engineering and other disciplines, such as bio-, info-, nano- and social sciences and technology. Manuscripts submitted for publication will be subject to a stringent peer review.