基于静态应变测量试验的混凝土环箍效应有限元分析
摘要
混凝土是一种重要的建筑材料,单轴抗压强度是其一项重要的力学指标,然而环箍效应的存在会影响抗压强度实测值。文章为了探究其作用范围和影响效果,先假设一个理想的受力模型,根据第二强度理论做出假定,即混凝土试件侧面同时受到压力和弯矩作用,达到最大拉应变时横向受拉破坏。通过静态应变仪测量应变的方法对试验假设进行验证,证明了环箍效应的存在和此前假定的试件表面微元体的受力形式。以此为基础,使用ABAQUS软件,去除多余约束,对受力模型施加试验机量程外的荷载,进一步从固体力学的角度对环箍效应进行有限元分析。
引文
[1]Lu,D.,Wang,G.,Du,X.,Wang,Y.A nonlinear dynamic uniaxial strength criterion that considers the ultimate dynamic strength of concrete[J].International Journal of Impact Engineering,2017,103:124-137.doi:10.1016/j.ijimpeng.2017.01.011.
[2]Lim,J.C.,Ozbakkaloglu,T.,Gholampour,A.,Bennett,T.,Sadeghi,R.Finite-Element Modeling of Actively Confined Normal-Strength and High-Strength Concrete under Uniaxial,Biaxial,and Triaxial Compression[J].Journal of Structural Engineering,2016,142.doi:10.1061/(ASCE)ST.1943-541X.0001589.
[3]Chen,E.,Leung,C.K.Y.Effect of uniaxial strength and fracture parameters of concrete on its biaxial compressive strength[J].Journal of Materials in Civil Engineering,2014,26.doi:10.1061/(ASCE)MT.1943-5533.0000919.
[4]Bielawski,C.Strength criterion for concrete in a triaxial state of stress[J].Archiwum Inzynierii Ladowej,1987,33:483-497.
[5]Lu,D.,Wang,G.,Du,X.,Wang,Y.A nonlinear dynamic uniaxial strength criterion that considers the ultimate dynamic strength of concrete[J].International Journal of Impact Engineering,2017,103:124-137.doi.
[6]Abdel-Fattah,H.,Ahmad,S.H.Behavior of hoop-confined high-strength concrete under axial and shear loads[J].ACI Structural Journal,1989,86:652-659.
[7]L.LAM,S.T.SMITH.Analysis and behaviour of FRP-confined short concrete columns subjected to eccentric loading[J].Journal of Zhejiang University(Science A:An International Applied Physics&Engineering Journal),2008,01:38-49.
[8]邹艳红,沈明秀.环箍连接结构参数化有限元优化设计[J].电子测试,2015(19):6-7.
[9]王炜.交通工程学[M].南京:东南大学出版社,2002.
[10]王琼.钢筋混凝土柱托换的试验研究[D].天津大学,2009.
[11]陈帅.混凝土斜方体抗压试验研究[D].天津大学,2012.
[2]Lim,J.C.,Ozbakkaloglu,T.,Gholampour,A.,Bennett,T.,Sadeghi,R.Finite-Element Modeling of Actively Confined Normal-Strength and High-Strength Concrete under Uniaxial,Biaxial,and Triaxial Compression[J].Journal of Structural Engineering,2016,142.doi:10.1061/(ASCE)ST.1943-541X.0001589.
[3]Chen,E.,Leung,C.K.Y.Effect of uniaxial strength and fracture parameters of concrete on its biaxial compressive strength[J].Journal of Materials in Civil Engineering,2014,26.doi:10.1061/(ASCE)MT.1943-5533.0000919.
[4]Bielawski,C.Strength criterion for concrete in a triaxial state of stress[J].Archiwum Inzynierii Ladowej,1987,33:483-497.
[5]Lu,D.,Wang,G.,Du,X.,Wang,Y.A nonlinear dynamic uniaxial strength criterion that considers the ultimate dynamic strength of concrete[J].International Journal of Impact Engineering,2017,103:124-137.doi.
[6]Abdel-Fattah,H.,Ahmad,S.H.Behavior of hoop-confined high-strength concrete under axial and shear loads[J].ACI Structural Journal,1989,86:652-659.
[7]L.LAM,S.T.SMITH.Analysis and behaviour of FRP-confined short concrete columns subjected to eccentric loading[J].Journal of Zhejiang University(Science A:An International Applied Physics&Engineering Journal),2008,01:38-49.
[8]邹艳红,沈明秀.环箍连接结构参数化有限元优化设计[J].电子测试,2015(19):6-7.
[9]王炜.交通工程学[M].南京:东南大学出版社,2002.
[10]王琼.钢筋混凝土柱托换的试验研究[D].天津大学,2009.
[11]陈帅.混凝土斜方体抗压试验研究[D].天津大学,2012.