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Uniaxial compressive behaviour of a FRP standing support made of mine wastes

矿业科学技术学报:英文版 2023年第8期33卷 991-1000页

作者： Zhenjun Shan Ting Ren Jan Nemcik Guanzheng Wu Liang Zhao School of Civil MiningEnvironmental and Architectural EngineeringUniversity of WollongongWollongongNSW 2522Australia Azure Mining Technology CCTEGChatswoodNSW 2067Australia

Twenty-seven specimens were tested to investigate the uniaxial compression behaviour of an innovative standing support for underground space *** innovative standing support consisted of an external fibre reinforced polymer(FRP)jacket and the infill column made of cementitious grout,tailings and coal wash *** of the FRP layers number and water to the cementitious grout(w/g)ratio were *** results indicated that lower w/g ratios produced stronger infill *** FRP confinement,the standing support demonstrated strain-hardening loading characteristics with a significant improvement in both strength and *** highest strength and strain of the specimens achieved was 58.4 MPa and 11.8%*** with the unconfined specimens,the confinement with four FRP layers increased the specimen strength and associated strain up to 3.6 and 27.0 times respectively.A correlation between the compressive strength of the infill material and the ultrasonic pulse velocity was also ***,a simple design-oriented model was proposed to predict the peak strength and the corresponding strain of the innovative standing support.

关键词： Standing support Underground spaces FRP Tailings and coal wash rejects design-oriented model

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Experimental Study on the Compressive Behavior of CFRP/ECCs

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Journal of Southwest Jiaotong University(English Edition) 2010年第4期18卷 295-302页

作者：孙文彬 School of Civil Engineering Huaiyin Institute of Technology Faculty of Science Jiangsu University

In this study,nine square concrete columns,including six CFRP/ECCs and three plain concrete control specimen columns,were prepared. The CFRP tubes with fibers oriented in the hoop direction were manufactured with 10,20,or 40 mm rounded corner radii at vertical edges. A 100 mm overlap in the direction of fibers was provided to ensure a proper bond. Uniaxial compression tests were conducted to investigate the compressive behaviors including the axial strength,stress-strain response,and ductility. It is evident that the CFRP tube confinement can improve the compressive behavior of concrete core,in terms of axial compressive strength or axial deformability. Based on the experimental results and some existing test database attained by other researchers,a design-oriented model is developed. The predictions of the model for CFRP/ECCs show good agreement with test results.

关键词： Carbon fiber reinforced polymer (CFRP) Concrete column Encasement Confinement Compressive behavior Enhancement parameter design-oriented model

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