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（西安理工大學(xué)土木建筑工程學(xué)院， 西安 710048）
［摘要］為研究玻璃纖維(GFRP)管型鋼再生混凝土組合柱的軸心受壓性能，進行了11根GFRP管型鋼再生混凝土組合柱軸壓試驗研究，重點分析了組合柱的破壞形態(tài)和荷載-位移曲線等。在此基礎(chǔ)上，利用ABAQUS有限元軟件對軸壓荷載作用下GFRP管型鋼再生混凝土組合柱的受力性能進行有限元分析，確定GFRP管、型鋼以及再生混凝土的本構(gòu)模型，建立組合柱有限元模型，獲取該組合柱的破壞形態(tài)及應(yīng)力云圖，并驗證數(shù)值模擬結(jié)果的合理性，主要分析設(shè)計參數(shù)對組合柱軸壓性能的影響。結(jié)果表明：計算荷載變形曲線與試驗結(jié)果良好吻合，建立的有限元模型可用于模擬GFRP管型鋼再生混凝土組合柱軸壓性能。組合柱的軸壓承載力隨著再生骨料取代率和組合柱長細比的增大而逐漸降低，而隨著配鋼率和再生混凝土強度的增大而增大；增大配鋼率對于提高組合柱的變形能力是有利的；此外，GFRP管型鋼再生混凝土組合柱具有承載力高的優(yōu)勢，研究結(jié)果可為該新型組合柱的工程應(yīng)用提供技術(shù)支持。
［關(guān)鍵詞］GFRP管； 型鋼再生混凝土； 組合柱； 軸壓性能； 再生骨料取代率； 長細比； 配鋼率
中圖分類號：TU398文獻標識碼：A文章編號：1002-848X(2020)13-0076-08
Experimental and numerical analysis on axial compressive behavior of GFRP tube confined steel reinforced recycled concrete composite columns
MA Hui, WANG Pei, LI Zhe, LI Jiaxin, ZHANG Peng
（School of Civil Engineering and Architecture, Xi′an University of Technology, Xi′an 710048, China）
Abstract:In order to study the axial compressive behavior of glass fiber reinforced plastic (GFRP) tube confined steel reinforced recycled concrete composite columns, eleven GFRP tube confined steel reinforced recycled concrete composite columns were tested under axial compressive loads. The failure pattern and load-displacement curves of the composite columns were analyzed emphatically. On this basis, ABAQUS finite element software was used to analyze the mechanical properties of GFRP tube confined steel reinforced recycled concrete composite columns under axial compressive loads, determine the constitutive model of GFRP tube, steel and recycled concrete, establish the finite element model of composite columns, obtain the failure mode and stress cloud graph of the composite columns, and verify the rationality of the numerical simulation results. The influence of parameters on the axial compression performance of composite columns was analyzed. The results show that the calculated load-deformation curves are in good agreement with the test results, and the finite element model can be used to simulate the axial compression performance of GFRP tube confined steel reinforced recycled concrete composite columns. The axial bearing capacity of composite columns decreases with the increase of recycled aggregate replacement percentage and slenderness ratio of composite columns, but increases with the increase of steel ratio and recycled concrete strength; increasing steel ratio is beneficial to improve the deformation capacity of composite columns; in addition, GFRP tube confined steel reinforced recycled concrete composite columns have the advantage of high bearing capacity, and the research results can provide technical support for the engineering application of the new composite column.
Keywords:GFRP tube; steel reinforced recycled concrete; composite column; axial compressive behavior; recycled aggregate replacement percentage; slenderness ratio; steel ratio
*國家自然科學(xué)基金項目(51408485)，陜西省自然科學(xué)基礎(chǔ)研究計劃項目(2019JM-193)，陜西省住房城鄉(xiāng)建設(shè)科學(xué)技術(shù)計劃項目(2015-K129)，陜西省重點研發(fā)計劃項目(2020SF-392)。
作者簡介：馬輝，博士，副教授，碩士生導(dǎo)師，Email: mahuiwell@163.com。
