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.

构成模型对薄壁结构的定位行为的影响通过使用去年开发的计算机程序来研究。此外，通过分析和实验，研究了其对变形能力的影响，研究了厚圆柱壳的公理对称屈曲模式的循环定位。以下结果总结了如此获得的结果。1）组成型模型对压缩板的定位行为的影响。与具有两面构成模型的那些相比，具有双线性本构模型的压缩板在较小的面内位移下表现出定位现象。用两面构型模型的板的初始位移对循环定位行为有一定影响。2）定位行为对较厚圆柱形壳的变形能力的降低的影响。作者提出的分析方法很好地模拟了实验显示的厚圆柱壳的定位行为。当定位发生时，具有较大半径厚度比（r/t）和长 - 拉迪乌斯比（L/R）的圆柱形壳显示出较大的载荷下降。本构模型的效果在循环载荷下的定位行为中很重要。

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。

後藤,芳顯: "圧縮板の塑性座屈モードの局所化と変形能の低下" 土木学会論文集. 5109/I-31(掲載予定). (1995)

Goto, Yoshiaki：“塑性屈曲模式的本地化和压缩板变形性的降低”，日本土木工程师学会会议记录 5109/I-31（待出版）。