多开口甲板板架结构极限承载力实验研究
|
摘要
[目的]为了研究多开口结构形式对甲板板架结构极限承载能力的影响,[方法]以2种不同开口形式的双层板架模型为研究对象,对其在轴向压缩载荷作用下的极限承载能力进行实验研究,对比分析双开口甲板结构和舷侧开口板架结构的失稳破坏模式及极限承载能力,得到多开口甲板板架结构在逐步崩溃过程中甲板各处应力的变化规律。[结果]实验结果表明:开口角隅处应力集中现象明显,随着轴向压缩载荷逐渐增大,开口中部甲板应力急剧上升,多开口结构最终均在最大开口的中部发生失稳破坏;甲板开口尺寸对结构初始轴向刚度的影响显著,舷侧开口结构则在弹塑性变形阶段对极限承载力的影响占主导地位。[结论]所提实验研究方法及结果可为此类甲板结构的设计提供参考。
[Objectives]In order to study the impact of the multi-opening structure on the ultimate bearing capacity of deck grillage structure,[Methods]the ultimate bearing capacity of the double deck frame model with two different opening types was studied experimentally under the uniaxial compression load. This paper identified the stress change pattern of deck grillage with multiple openings,by analyzing the buckling failure mode and ultimate bearing capacity of double-opening deck structure and broadside opening structure in the process of gradual collapse.[Results]The experiment results show that the stress concentration is obvious at the corner of the opening. With the gradual increase of axial compression load,the stress of the middle deck of the opening increases sharply,and the multi-opening structure eventually suffers buckling failure in the middle of the biggest opening. The deck opening size has a significant impact on the initial axial stiffness of the structure,while the side opening structure has a dominant influence on the ultimate bearing capacity in the elastoplastic deformation stage.[Conclusions]The experimental research methods and results can provide reference for the design of such deck structures.
[Objectives]In order to study the impact of the multi-opening structure on the ultimate bearing capacity of deck grillage structure,[Methods]the ultimate bearing capacity of the double deck frame model with two different opening types was studied experimentally under the uniaxial compression load. This paper identified the stress change pattern of deck grillage with multiple openings,by analyzing the buckling failure mode and ultimate bearing capacity of double-opening deck structure and broadside opening structure in the process of gradual collapse.[Results]The experiment results show that the stress concentration is obvious at the corner of the opening. With the gradual increase of axial compression load,the stress of the middle deck of the opening increases sharply,and the multi-opening structure eventually suffers buckling failure in the middle of the biggest opening. The deck opening size has a significant impact on the initial axial stiffness of the structure,while the side opening structure has a dominant influence on the ultimate bearing capacity in the elastoplastic deformation stage.[Conclusions]The experimental research methods and results can provide reference for the design of such deck structures.
引文
[1]Sun H H,Soares C G.An experimental study of ultimate torsional strength of a ship-type hull girder with a large deck opening[J].Marine Structures,2003,16(1):51-67.
[2]Ao L,Wang D Y.Ultimate torsional strength of cracked stiffened box girders with a large deck opening[J].International Journal of Naval Architecture and Ocean Engineering,2016,8(4):360-374.
[3]万琪,王福花.大跨度无支撑甲板纵向稳定性分析和优化设计[J].中国造船,2011,52(1):17-25.Wang Q,Wang F H.Longitudinal stability analysis and optimum design of supportless long-span deck structure[J].Shipbuilding of China,2011,52(1):17-25(in Chinese).
[4]Xu M C,Soares C G.Assessment of the ultimate strength of narrow stiffened panel test specimens[J].Thin-Walled Structures,2012,55:11-21.
[5]崔维成,郑金鑫,裴俊厚.计及横向应力和垂向载荷影响的加筋板格有效板宽的理论计算方法[J].船舶力学,2001,5(4):29-37.Cui W C,Zheng J X,Pei J H.An analytical method for calculating the effective width of stiffened panel plating considering the influences of transverse stresses and lateral load[J].Journal of Ship Mechanics,2001,5(4):29-37(in Chinese).
[6]Paik J K,Seo J K.Nonlinear finite element method models for ultimate strength analysis of steel stiffenedplate structures under combined biaxial compression and lateral pressure actions-Part I:plate elements[J].Thin-Walled Structures,2009,47(8/9):1008-1017.
[7]Paik J K,Seo J K.Nonlinear finite element method models for ultimate strength analysis of steel stiffenedplate structures under combined biaxial compression and lateral pressure actions-Part II:stiffened panels[J].Thin-Walled Structures,2009,47(8/9):998-1007.
[8]Xu M C,Soares C G.Comparisons of calculations with experiments on the ultimate strength of wide stiffened panels[J].Marine Structures,2013,31:82-101.
[9]王东海,李润培,杜忠仁,等.1700 TEU集装箱船甲板大开口强度分析[J].上海交通大学学报,2002,36(1):107-111.Wang D H,Li R P,Du Z R,et al.Comparison of the large deck opening strength assessment of 1700 TEUcontainer carrier according to GL and ABS rule[J].Journal of Shanghai Jiaotong University,2002,36(1):107-111(in Chinese).
[10]Yu C L,Lee J S.Ultimate strength of simply supported plate with opening under uniaxial compression[J].International Journal of Naval Architecture and Ocean Engineering,2012,4(4):423-436.
[11]Yu C L,Lee J S.Formulation of reduction rate for ultimate compressive strength of stiffened panel induced by opening[J].China Ocean Engineering,2014,28(4):557-568.
[12]Kwon Y B,Park H S.Compression tests of longitudinally stiffened plates undergoing distortional buckling[J].Journal of Constructional Steel Research,2011,67(8):1212-1224.
[13]王佳颖,张世联.纵向箱型梁舱段极限强度试验研究[J].中国造船,2011,52(2):47-54.Wang J Y,Zhang S L.Ultimate strength experimental research for longitudinal box girders module model[J].Shipbuilding of China,2011,52(2):47-54(in Chinese).
[2]Ao L,Wang D Y.Ultimate torsional strength of cracked stiffened box girders with a large deck opening[J].International Journal of Naval Architecture and Ocean Engineering,2016,8(4):360-374.
[3]万琪,王福花.大跨度无支撑甲板纵向稳定性分析和优化设计[J].中国造船,2011,52(1):17-25.Wang Q,Wang F H.Longitudinal stability analysis and optimum design of supportless long-span deck structure[J].Shipbuilding of China,2011,52(1):17-25(in Chinese).
[4]Xu M C,Soares C G.Assessment of the ultimate strength of narrow stiffened panel test specimens[J].Thin-Walled Structures,2012,55:11-21.
[5]崔维成,郑金鑫,裴俊厚.计及横向应力和垂向载荷影响的加筋板格有效板宽的理论计算方法[J].船舶力学,2001,5(4):29-37.Cui W C,Zheng J X,Pei J H.An analytical method for calculating the effective width of stiffened panel plating considering the influences of transverse stresses and lateral load[J].Journal of Ship Mechanics,2001,5(4):29-37(in Chinese).
[6]Paik J K,Seo J K.Nonlinear finite element method models for ultimate strength analysis of steel stiffenedplate structures under combined biaxial compression and lateral pressure actions-Part I:plate elements[J].Thin-Walled Structures,2009,47(8/9):1008-1017.
[7]Paik J K,Seo J K.Nonlinear finite element method models for ultimate strength analysis of steel stiffenedplate structures under combined biaxial compression and lateral pressure actions-Part II:stiffened panels[J].Thin-Walled Structures,2009,47(8/9):998-1007.
[8]Xu M C,Soares C G.Comparisons of calculations with experiments on the ultimate strength of wide stiffened panels[J].Marine Structures,2013,31:82-101.
[9]王东海,李润培,杜忠仁,等.1700 TEU集装箱船甲板大开口强度分析[J].上海交通大学学报,2002,36(1):107-111.Wang D H,Li R P,Du Z R,et al.Comparison of the large deck opening strength assessment of 1700 TEUcontainer carrier according to GL and ABS rule[J].Journal of Shanghai Jiaotong University,2002,36(1):107-111(in Chinese).
[10]Yu C L,Lee J S.Ultimate strength of simply supported plate with opening under uniaxial compression[J].International Journal of Naval Architecture and Ocean Engineering,2012,4(4):423-436.
[11]Yu C L,Lee J S.Formulation of reduction rate for ultimate compressive strength of stiffened panel induced by opening[J].China Ocean Engineering,2014,28(4):557-568.
[12]Kwon Y B,Park H S.Compression tests of longitudinally stiffened plates undergoing distortional buckling[J].Journal of Constructional Steel Research,2011,67(8):1212-1224.
[13]王佳颖,张世联.纵向箱型梁舱段极限强度试验研究[J].中国造船,2011,52(2):47-54.Wang J Y,Zhang S L.Ultimate strength experimental research for longitudinal box girders module model[J].Shipbuilding of China,2011,52(2):47-54(in Chinese).