Strength Deterioration of Thin-walled Structures due to Localization of Plastic Buckling Patterns under Cyclic Loading

循环载荷下塑性屈曲模式局部化导致薄壁结构强度劣化

• 批准号: 06650517
• 负责人: GOTO Yoshiaki
• 金额: $ 0.26万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650517/
• 关键词: localization; thin-walled structure; seismic design; plastic bifurcation; cyclic loading; steel structure

The effect of constitutive models on the localization behavior of thin-walled structures was investigated by making use of the computer program developed last year. In addition, the cyclic localization of axi-symmetric buckling patterns of thick cylindrical shells was investigated by analysis and experiment with special emphasis on its effect on the deformation capacity. The results so obtained are summarized in the following.1)Effect of constitutive models on the localization behavior of compression platesa. The compression plates with the bi-linear constitutive model exhibit localization phenomena under smaller in-plane displacements, compared to those with the two-surface constitutive model.b. Initial displacements of the plates with the two-surface constitutive model have some effect on the cyclic localization behavior.2)Effect of localization behavior on the reduction of deformation capacity of thick cylindrical shellsa. The analysis method proposed by authors well simulate the localization behavior of thick cylindrical shells shown by the experiment.b. The cylindrical shells with larger radius-thickness ratio (R/t) and length-radius ratio (L/R) exhibit a larger load drop when the localization occurs.c. The effect of the constitutive models is significant in the localization behavior under cyclic loading.

利用去年开发的计算机程序，研究了本构模型对薄壁结构局部化行为的影响。此外，还通过分析和试验研究了厚圆柱壳轴对称屈曲模式的循环局部化问题，特别是其对变形能力的影响。主要结果如下：1）本构模型对受压板局部化行为的影响。与双曲面本构模型相比，双线性本构模型的受压板在较小的面内位移下表现出局部化现象.双面本构模型板的初始位移对循环局部化行为有一定的影响。2）局部化行为对厚圆柱壳变形能力折减的影响a.本文提出的分析方法较好地模拟了厚圆柱壳的局部化行为。具有较大径厚比（R/t）和长径比（L/R）的圆柱壳在局部化发生时表现出较大的载荷下降。本构模型对循环荷载作用下的局部化行为有重要影响。

项目成果

Yoshiaki Goto: "Localization of Plastic Buckling Patterns under Cyclic Loading" Jounral of Engineering Mechanics,ASCE. 121(掲載予定). (1995)

Yoshiaki Goto：“循环载荷下塑性屈曲模式的定位”，工程力学杂志，ASCE 121（待出版）。

Yoshiaki Goto.: "Localization of Buckling Patterns under Cyclic Loading" Proc.of WCCM III. Vol.II. 1255-1256 (1994)

Yoshiaki Goto.：“循环载荷下屈曲模式的本地化”Proc.of WCCM III。

Yoshiaki Goto: "Ductility and Strength Deterioration of Rectangular Compression Plate due to Localization of Plastic Buckling Patterns" Proc.of JSCE. No.513/I-31. 39-51 (1995)

Yoshiaki Goto：“由于塑性屈曲模式的局部化而导致矩形压缩板的延展性和强度恶化”Proc.of JSCE。

Yoshiaki Goto: "Strength Deterioration of Rectangular Compression Plate due to Cyclic Localization of Buckling Patterns" Proc.of ICSS. Vol.I. 233-244 (1995)

Yoshiaki Goto：“由于屈曲模式的循环局部化而导致矩形压缩板的强度恶化”Proc.of ICSS。

Yoshiaki Goto: "Strength deterioration of rectangular compression plate due to cyclic localization of buckling patterns" Proc.of ICSS. I. 233-240 (1995)

Yoshiaki Goto：“由于屈曲模式的循环局部化，矩形压缩板的强度恶化”Proc.of ICSS。