884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

（西安科技大學(xué)， 西安 710054）

 ［摘要］利用ABAQUS有限元軟件分析了碳纖維布加固局部強(qiáng)度不足混凝土柱的受力性能。對(duì)加固前后不同區(qū)域混凝土的變形情況和應(yīng)力-應(yīng)變關(guān)系曲線、鋼筋和箍筋的變形情況和應(yīng)力-應(yīng)變關(guān)系曲線以及混凝土柱整體的荷載-位移曲線做對(duì)比分析。研究結(jié)果表明，碳纖維布對(duì)加固區(qū)域混凝土可以產(chǎn)生明顯的約束作用，增強(qiáng)混凝土柱整體抵抗變形的能力。對(duì)局部強(qiáng)度不足區(qū)域的混凝土裂縫發(fā)展有明顯的抑制作用，可小幅度的提高混凝土柱的極限承載力。當(dāng)碳纖維布層數(shù)超過3層時(shí)，增加層數(shù)僅對(duì)混凝土柱延性性能有影響，對(duì)其承載力的提高無明顯作用。

［關(guān)鍵詞］ABAQUS； CFRP； 混凝土柱； 應(yīng)力應(yīng)變曲線； 變形

中圖分類號(hào)： TU375.3 文獻(xiàn)標(biāo)識(shí)碼： A文章編號(hào)：  1002-848X(2016)S2-0451-05

FEM analysis on axial compression performance of concrete columns

 strengthened by CFRP for local insufficient strength

Zhang Bin, Zou Renhua, Li Qiang, Lü Rouke

（Xi′an University of Science and Technology, Xi′an 710054， China）

Abstract: Finite element software of ABAQUS was used to analyze the mechanical behavior of concrete columns strengthened by carbon fiber reinforced plastics for local insufficient strength. Comparison analyses were conducted on mechanical results of specimens before and after strengthening, including deformation condition and stress-strain relationship curve of the concrete, deformation condition and stress-strain relationship curve of the reinforcement and stirrup, and load-displacement curve of the overall concrete columns. The study results show that the CFRP can obviously restrain the concrete in the strengthened zone to strengthen the ability of the concrete column to resist the deformation. CFRP has obvious inhibiting effect on the development of concrete cracks in the area with local insufficient strength, and can improve the ultimate bearing capacity of concrete column. When the number of layers of CFRP is more than three, the increase of the number of layers only has no obvious effect on improvement of the ductility and bearing capacity of the concrete column.

Keywords: ABAQUS; carbon fiber reinforced plastics (CFRP); concrete column; stress-strain curve; deformation

作者簡介： 張彬，研究生，Email：331654176@qq.com。

*國家青年自然科學(xué)基金（5140081218），銹蝕鋼筋混凝土柱抗剪性能研究。