螺旋配筋高强混凝土梁的抗扭性能

IF 0.9 Q4 ENGINEERING, CIVIL

Australian Journal of Structural Engineering Pub Date : 2021-08-04 DOI:10.1080/13287982.2021.1962489

Enas Al-Faqra, Y. Murad, Mu'tasim Abdel Jaber, Nasim Shatarat

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引用次数: 6

摘要

摘要:本文对连续螺旋钢筋横向加固的高强混凝土梁的抗扭性能进行了实验研究。17个试件按混凝土强度25、50、60、70 MPa分为4组。两种类型的横向加固，包括封闭和螺旋马镫，在每组的横向间距为75和125毫米。试验结果与使用ACI方程预测的分析值进行了比较。试验结果表明，与使用普通强度混凝土制成的试件相比，使用高强度混凝土制成的试件的极限抗扭能力有所提高。增强率为1.4% ~ 46.3%。此外，研究结果表明，与传统封闭马镫相比，螺旋加固的试件的极限抗扭能力有所增强。增强率从8.3%到34.6%不等。研究结果表明，在相同强度的混凝土下，采用连续螺旋钢筋比传统封闭箍筋具有更高的极限抗扭能力，并且ACI-318 M-19的扭转方程对于采用连续螺旋钢筋的高强混凝土是适用的和保守的。

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Torsional behaviour of high strength concrete beams with spiral reinforcement

ABSTRACT The torsional behaviour of high-strength concrete beams that are transversely reinforced with continuous spiral reinforcement is experimentally investigated in this research. Seventeen specimens are divided into four groups according to their concrete strength: 25, 50, 60, and 70 MPa. Two types of transverse reinforcement, including closed and spiral stirrups, are used at a transverse spacing of 75 and 125 mm for each group. Test results are compared to the analytical values predicted using the ACI equation. Test results have shown an enhancement in the ultimate torsional capacity for the specimens made with high strength concrete compared to those made using normal strength concrete. The enhancement percentage ranges from 1.4% to 46.3%. In addition, results have shown an enhancement in the ultimate torsional capacity for specimens reinforced with spiral reinforcement compared to specimens made with conventional closed stirrups. The enhancement percentage varies from 8.3% to 34.6%. The study concluded that utilising continuous spiral reinforcement would result in higher ultimate torsional capacity than traditional closed stirrups for the same strength of concrete and that the torsion equations of ACI-318 M-19 are applicable and conservative for high strength concrete with a continuous spiral reinforcement.

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来源期刊

Australian Journal of Structural Engineering ENGINEERING, CIVIL-

CiteScore

2.50

自引率

0.00%

发文量

期刊介绍： The Australian Journal of Structural Engineering (AJSE) is published under the auspices of the Structural College Board of Engineers Australia. It fulfils part of the Board''s mission for Continuing Professional Development. The journal also offers a means for exchange and interaction of scientific and professional issues and technical developments. The journal is open to members and non-members of Engineers Australia. Original papers on research and development (Technical Papers) and professional matters and achievements (Professional Papers) in all areas relevant to the science, art and practice of structural engineering are considered for possible publication. All papers and technical notes are peer-reviewed. The fundamental criterion for acceptance for publication is the intellectual and professional value of the contribution. Occasionally, papers previously published in essentially the same form elsewhere may be considered for publication. In this case acknowledgement to prior publication must be included in a footnote on page one of the manuscript. These papers are peer-reviewed as new submissions. The length of acceptable contributions typically should not exceed 4,000 to 5,000 word equivalents. Longer manuscripts may be considered at the discretion of the Editor. Technical Notes typically should not exceed about 1,000 word equivalents. Discussions on a Paper or Note published in the AJSE are welcomed. Discussions must address significant matters related to the content of a Paper or Technical Note and may include supplementary and critical comments and questions regarding content.