开孔对GFRP管约束混凝土柱受压性能的影响
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摘要
基于已有的GFRP约束混凝土柱相关试验成果,利用ABAQUS建立2根无损试件并验证模型的正确性;通过有限元软件建立4根无损GFRP管约束混凝土组合柱轴压试验模型,在此基础上设计12根不同开孔尺寸、位置带几何缺陷GFRP管约束混凝土组合柱轴压试验模型,研究开孔尺寸、位置对缺陷试件轴压性能的影响规律,分析组合柱应力分布、极限承载力和荷载-应变全过程的变化曲线.结果表明:随着开孔尺寸的增大,带几何缺陷试件的承载力逐渐降低;开孔位置对承载力的影响微小.
Based on the existing experimental results of GFRP-constrained concrete columns,ABAQUS was used to establish two nondestructive specimens and verify the correctness of the models. Four non-destructive GFRP tube-constrained concrete composite column axial compression test models were established by using finite element software,the different opening sizes and different opening positions were designed on the basis of nondestructive test piece model. Twelve GFRP pipe-constrained concrete composite columns' test models of axial compression with geometrical defects were used to study the influence of different opening sizes and positions in the axial compression performance of the fractured specimens. The stress distribution,ultimate bearing capacity and load-strain curves of the composite columns under different parameters of different opening sizes and positions are analyzed. The results showed that the bearing capacity of the specimens with geometric defects gradually decreases with the increase of the opening sizes,and the opening positions have slight influence on the bearing capacity of the specimens with geometric defects.
Based on the existing experimental results of GFRP-constrained concrete columns,ABAQUS was used to establish two nondestructive specimens and verify the correctness of the models. Four non-destructive GFRP tube-constrained concrete composite column axial compression test models were established by using finite element software,the different opening sizes and different opening positions were designed on the basis of nondestructive test piece model. Twelve GFRP pipe-constrained concrete composite columns' test models of axial compression with geometrical defects were used to study the influence of different opening sizes and positions in the axial compression performance of the fractured specimens. The stress distribution,ultimate bearing capacity and load-strain curves of the composite columns under different parameters of different opening sizes and positions are analyzed. The results showed that the bearing capacity of the specimens with geometric defects gradually decreases with the increase of the opening sizes,and the opening positions have slight influence on the bearing capacity of the specimens with geometric defects.
引文
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[14]刘永健,程高,张宁,等.开孔钢板加劲型方钢管混凝土轴压短柱试验研究[J].建筑结构学报,2014,35(10):39-46.
[15]鲁国昌.FRP管约束混凝土轴压性能研究[D].北京:清华大学,2005.
[16]张云峰,吴紫阳,袁朝庆.轴心受压下GFRP管-型钢-混凝土组合柱的尺寸效应[J].黑龙江科技大学学报,2016,26(2):230-234.
[17]李娜,卢亦焱.钢管混凝土柱节点开孔后的抗压性能[J].武汉大学学报(工学版),2015,48(1):54-58.
[18]杨俊杰,周涛,章雪峰.FRP管实心混凝土柱承载力的轴压试验研究[J].建筑结构,2014,44(22):72-75,89.
[2]黄丽华,李字婧,张耀烨,等.不同种类FRP加固混凝土梁加固效果试验研究[J].大连理工大学学报,2013,53(1):102-107.
[3]于峰,武萍.FRP-约束混凝土组合柱研究进展[J].安徽工业大学学报(自然科学版),2013,30(3):285-291.
[4]吕仲亮.钢筋FRP管混凝土偏心受压构件力学性能的研究[D].大庆:东北石油大学,2013.
[5]张行强.压弯作用下FRP约束混凝土应力-应变关系的试验研究[D].杭州:浙江大学,2014.
[6]蔡静.大尺寸CFRP约束混凝土方柱的轴心抗压试验研究[D].长沙:湖南大学,2015.
[7] Xiaogang Wang,Chaofeng Liang.Mechanical properties of GFRP tube confined recycled concrete under axial compression[J].IOPConference Series:Materials Science and Engineering,2015,87(1):12-15.
[8] LI Y L,ZHAO X L,R K Raman Singh,et al.Tests on seawater and sea sand concrete-filled CFRP,BFRP and stainless steeltubular stub columns[J].Thin-Walled Structures,2016,108:163-184.
[9] Fouad Khairallah.Mechanical behavior of confined self-compacting reinforced concrete circular columns under concentric axialloading[J].Ain Shams Engineering Journal,2013,4(4):641-649.
[10] Vasumathi A M,Rajkumar k,Prabhu G G.Compressive behaviour of RC column with fibre reinforced concrete confined byCFRP strips[J].Advances in Materials Science and Engineering,2014:601915.
[11]刘建相.大开孔率钢管混凝土柱承载力研究[D].哈尔滨:哈尔滨工业大学,2017.
[12]施建伟.基于ABAQUS复合材料层合板渐进损伤有限元分析[D].太原:中北大学,2015.
[13]陈宗平,陈宇良,钟铭,等.带开孔损伤方钢管混凝土柱轴压性能试验研究[J].建筑结构,2014,44(9):9-14.
[14]刘永健,程高,张宁,等.开孔钢板加劲型方钢管混凝土轴压短柱试验研究[J].建筑结构学报,2014,35(10):39-46.
[15]鲁国昌.FRP管约束混凝土轴压性能研究[D].北京:清华大学,2005.
[16]张云峰,吴紫阳,袁朝庆.轴心受压下GFRP管-型钢-混凝土组合柱的尺寸效应[J].黑龙江科技大学学报,2016,26(2):230-234.
[17]李娜,卢亦焱.钢管混凝土柱节点开孔后的抗压性能[J].武汉大学学报(工学版),2015,48(1):54-58.
[18]杨俊杰,周涛,章雪峰.FRP管实心混凝土柱承载力的轴压试验研究[J].建筑结构,2014,44(22):72-75,89.
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