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浙江大学学报(工学版)
浙江大学学报(工学版)
土木工程     
纯弯作用下深海夹层管复合结构屈曲失稳分析
雷明玮1, 龚顺风1, 胡勍2
1. 浙江大学 结构工程研究所,浙江 杭州 310058； 2. 中国联合工程公司,浙江 杭州 310052
Buckling and collapse analysis for composite structures of deepwater sandwich pipes under pure bending
LEI Mingwei1, GONG Shunfeng1, Hu Qing2
1. Institute of Structural Engineering, Zhejiang University, Hangzhou 310058, China;2. China United Engineering Corporation, Hangzhou 310052, China
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摘要：

通过切试件拉伸实验和夹层管段试件轴向推出实验,在钢表面光滑和粗糙条件下,分别获得采用环氧树脂胶和3MDP8005胶粘接的层间切应力位移关系曲线.利用有限元软件ABAQUS的建立夹层管复合结构在弯曲作用下的三维数值模型.采用非线性弹簧模拟夹层管轴向和环向的层间黏结性能.采用修正的RambergOsgood本构模型描述内外钢管的应力应变关系,假定夹芯层材料为线弹性.通过广泛的参数分析,系统阐述管道长度、层间黏结性能、截面几何构形以及材料特性等因素对夹层管屈曲失稳的影响机理.结果表明：在纯弯曲作用下,夹层管的屈曲失稳性能明显优于传统的单层管,实际粘接情况下夹层管的屈曲失稳性能更接近于无粘接情况下管道的屈曲失稳性能；管道长度对夹层管的屈曲失稳模态有较大的影响,黏结剂的切强度以及接触面的粗糙程度对夹层管的屈曲失稳性能影响较小,而截面几何构形以及内外管材料特性对夹层管屈曲失稳性能的影响较为显著.
Abstract:

The tension tests of shear specimens and axial pushout tests of sandwich pipe specimens were carried out, and the corresponding curves of interlayer shear stressdisplacement were obtained using epoxy resin and 3MDP8005 adhesives in the smooth and rough steel contact surfaces, respectively. A threedimensional numerical model of composite structures for sandwich pipes under pure bending was established by using the finite element software ABAQUS. The nonlinear springs were used to model the longitudinal and circumferential interlayer adhesion behaviors of sandwich pipes based on the experimental measured results. The modified RambergOsgood constitutive model was applied to describe the stressstrain relationships of inner and outer steel pipes, and the core material was assumed to be linear elastic. Through the extensive parametric analyses, the influencing mechanisms of pipe length, interlayer adhesion behaviors, geometric configurations of the pipe section, and the material properties on the buckling and collapse capacity of sandwich pipes were systematically illustrated. The results show that the buckling and collapse capacity of sandwich pipes under pure bending is significantly superior to that of traditional singlewalled pipes. The buckling and collapse behaviors of sandwich pipes in real adhesion conditions are more similar to the case of no interlayer adhesion. The pipe length has great influence on the buckling mode of sandwich pipes. The shear strength of adhesives and the roughness of contact surfaces have less influence on the buckling and collapse capacity of sandwich pipes, while the geometric configurations of the pipe section and the material properties of steel pipes have remarkable influence.
出版日期: 2015-12-31
:  TE 973.1  
基金资助:

国家自然科学基金资助项目（51479176, 51009122）.
通讯作者: 龚顺风，男，教授. ORCID：0000000241849639.     E-mail: sfgong@zju.edu.cn
作者简介: 雷明玮（1990—），女，硕士生，从事深水海底管道研究. ORCID: 0000000185212026. Email：21312041@zju.edu.cn
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引用本文:

雷明玮, 龚顺风, 胡勍. 纯弯作用下深海夹层管复合结构屈曲失稳分析[J]. 浙江大学学报(工学版), 10.3785/j.issn.1008-973X.2015.12.018.

LEI Ming wei, GONG Shun feng, Hu Qing. Buckling and collapse analysis for composite structures of deepwater sandwich pipes under pure bending. JOURNAL OF ZHEJIANG UNIVERSITY (ENGINEERING SCIENCE), 10.3785/j.issn.1008-973X.2015.12.018.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2015.12.018    或    http://www.zjujournals.com/eng/CN/Y2015/V49/I12/2376

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