- 摘 要
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胡 波，王建國
（合肥工業(yè)大學(xué)土木與水利工程學(xué)院，合肥230009）[摘要] 采用非線性有限元分析程序ANSYS，選取She11181單元模擬分層FRP，假定混凝土達(dá)到抗壓強(qiáng)度后強(qiáng)度不變，對軸壓下FRP約束有拐角的方形混凝土短柱受力過程進(jìn)行了數(shù)值模擬。分析表明非線性有限元計算結(jié)果與試驗(yàn)結(jié)果吻合良好。從FRP對混凝土約束作用的分析可知，F(xiàn)RP對有拐角方形混凝土截面的約束主要集中在角部，F(xiàn)RP對混凝土的約束應(yīng)力與軸向壓應(yīng)力的關(guān)系曲線均呈現(xiàn)出有規(guī)律的梯次遞進(jìn)式的變化。從裂縫發(fā)展過程看，混凝土開裂主要發(fā)生在柱兩端，由角部開始再發(fā)展到中部。
[關(guān)鍵詞] FRP；約束混凝土；軸壓；數(shù)值模擬；拐角Numerical simulation study on FRP confined square concrete short columns with corners under axial compression
Hu Bo, Wang Jianguo
(School of Civil Engineering, Hefei University of Technology, Hefei 230009, China)Abstract: By using nonlinear FEM program ANSYS, the mechanical behavior of FRP confined square concrete short columns with corners under axial compression were analyzed. She11181 was selected to simulate FRP layers. It was assumed that the strength of concrete is constant after achieving compressive strength. The nonlinear FEM analysis results are in good agreement with experimental results. The constraint to square concrete section emerges in corners generally. The constraint stress verses axial stress curves trend to a regular and progressive rendering. Concrete cracking takes place in column ends mainly, from corner to center.
Keywords: FRP; confined concrete; axial compression; numerical simulation; corner
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