循环荷载作用下加筋板格单元的损伤累积及力学模型研究
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摘要
为了计算加筋板和船体梁在循环荷载作用下的极限强度,将一种能够考虑损伤累积和构件局部屈曲的一维钢材等效本构模型引入到加筋板格单元中,提出加筋板格单元在轴向循环荷载作用下的损伤累积力学模型,采用Visual Basic程序编制了计算程序,对若干加筋板格单元在双向轴向循环荷载作用下的承载性能进行计算研究,并使用非线性有限元软件Abaqus进行对比验证,结果表明所提理论方法具有较好的精度。
A one-dimensional equivalent constitutive model of steel with accumulation of damage and local buckling of component is used in the stiffened panel element to propose the bidirectional axial cyclic mechanical model of the stiffened panel element for calculating the ultimate strength of the stiffened panel and ship hull girder under cyclic loading. The theoretical method is programmed with Visual Basic procedure, and several load carrying capacities of the stiffened panel element under bidirectional axial cyclic loading are analyzed and calculated, compared by the calculation of the nonlinear finite element software Abaqus. The results show that the theoretical method has good accuracy.
A one-dimensional equivalent constitutive model of steel with accumulation of damage and local buckling of component is used in the stiffened panel element to propose the bidirectional axial cyclic mechanical model of the stiffened panel element for calculating the ultimate strength of the stiffened panel and ship hull girder under cyclic loading. The theoretical method is programmed with Visual Basic procedure, and several load carrying capacities of the stiffened panel element under bidirectional axial cyclic loading are analyzed and calculated, compared by the calculation of the nonlinear finite element software Abaqus. The results show that the theoretical method has good accuracy.
引文
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[13]HUGHES O F,MA M.Elastic Tripping Analysis of Asymmetrical Stiffeners[J].Computer&Structures,1996,61(3):369-389.
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[2]陈刚,刘应华.结构塑性极限与安定分析理论及工程方法[M].北京:科学出版社,2006.
[3]喻霁.循环弯矩作用下船体梁逐步崩溃行为的研究[D].武汉:武汉理工大学,2013.
[4]DAFALIAS Y F,POPOV E P.A Model of Nonlinearly Hardening Materials for Complex Loading[J].Acta Mechanica,1975,21:173-192.
[5]MENEGOTTO M,PINTO P E.Method of Analysis for Cyclically Loaded RC Plane Frames Including Changes in Geometry and Nonelastic Behavior of Elements under Combined Normal Force and Bending[J].IABSE Reports of the Working Commissions,1973,13:15-22.
[6]沈祖炎,沈苏.高层钢结构考虑损伤累积及裂纹效应的抗震分析[J].同济大学学报,2002,30(4):393-398.
[7]唐站站,谢旭,诸葛翰卿,等.低碳钢在反复荷载作用下的损伤及力学模拟[C]//全国结构工程学术会议.2017.
[8]王萌.强烈地震作用下钢框架的损伤退化行为[D].北京:清华大学,2013.
[9]郝际平.钢结构在循环荷载作用下的局部屈曲、低周疲劳的试验与理论研究[D].西安:西安建筑科技大学,1995.
[10]SHI Y J,WANG M,WANG Y Q.Extremely Low Cycle Fatigue Experimental and Constitutive Model Study of Structural Steel under Cyclic Loading[J].Journal of Constructional Steel Research,2011,67(8):1185-1197.
[11]LéGERON F,PAULTRE P,MAZARS J.Damage Mechanics Modeling of Nonlinear Seismic Behavior of Concrete Structures[J].Journal of Structural Engineering,2005,131(6):946-955.
[12]王萌,石永久,王元清.考虑累积损伤退化的钢材等效本构模型研究[J].建筑结构学报,2013,34(10):73-83.
[13]HUGHES O F,MA M.Elastic Tripping Analysis of Asymmetrical Stiffeners[J].Computer&Structures,1996,61(3):369-389.
[14]RAHMAN M K,CHOWDHURY M.Estimation of Ultimate Longitudinal Bending Moment of Ships and Box Girders[J].Journal of Ship Research,1996,40(3):244-257.
[15]ISSC.Committee III.1:Ultimate Strength[S].2015.