Development of Experimental Systems for Simulation of Complete Failures of Steel Structures Subjected to Earthquake Loading

地震荷载下钢结构完全破坏模拟实验系统的开发

• 批准号: 11555150
• 负责人: NAKASHIMA Masayoshi
• 金额: $ 8.83万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555150/
• 关键词: Complete Failure; Damage Evaluation; Structural Testing; On-Line Control Test

This study focuses on development of experimental techniques for the simulation of complete failures of structures subjected to earthquake loading. An experimental system that consists of very large stroke loading jacks, high resolution digital displacement transducers, and on-line digital computer control was developed. Using the system developed, tests were conducted for the simulation of complete failures of steel beams and columns. Here, complete failure was defined such that the member was fractured and separated completely and/or the member loses the capacity of sustaining gravity load. The major findings obtained from the tests are as follows.(1) Strong geometrical nonlinearity changed the mode of beam resistance from flexure to axial elongation/contraction.(2) This change of mode generated additional resistance even after the beam sustained significant damage.(3) Complete failure of steel columns was governed by the growth of cracks and succeeding fractures of the section.(4) A certain amount of axial load retarded the initiation and growth of cracks, which assist the increase of column capacity to complete failure. Numerical analysis using the finite element method was performed to simulate the experimental results, and it was found that the analysis is effective even in the regime of strong geometrical nonlinearity but fails to simulate the experimental behavior once the member topology is altered significantly.

这项研究的重点是发展的实验技术，模拟完全失败的结构受到地震荷载。研制了一套由超大行程加载千斤顶、高分辨率数字位移传感器和在线数字计算机控制组成的实验系统。利用所开发的系统，进行了试验模拟完全破坏的钢梁和柱。这里，完全失效被定义为构件断裂并完全分离和/或构件失去承受重力载荷的能力。测试所得的主要结果如下。(1)强烈的几何非线性改变了梁的阻力模式从弯曲到轴向伸长/收缩。(2)这种模式的变化产生了额外的阻力，即使在梁遭受重大损害。(3)钢柱的完全破坏是由裂纹的扩展和截面的后续断裂决定的。(4)一定的轴向荷载能延缓裂缝的萌生和扩展，有助于提高柱的承载力，使其完全破坏。使用有限元方法进行数值分析，以模拟实验结果，它被发现，分析是有效的，即使在政权的强几何非线性，但未能模拟实验行为，一旦成员的拓扑结构被显着改变。

项目成果

Kanao, I., Liu, D. and Nakashima, M.: "Lateral Buckling. And Post-Buckling Behavior of Standard and RBS Steel Beams Subjected Cyclic Loading"Joumal of Constructional Steel. Vol.9. 551-556 (2001)

Kanao, I.、Liu, D. 和 Nakashima, M.：“标准钢梁和 RBS 钢梁承受循环载荷的横向屈曲和后屈曲行为”建筑钢杂志。

Kanao, I., Nakashima, M. and Liu, D.: "Lateral Buckling Behavior and Lateral Bracing of Wide-Flange Beams Subjected Cyclic Loading"Journal of Structural and Construction Engineering, the Architectural Institute Japan. 544. 147-154 (2001)

Kanao, I.、Nakashima, M. 和 Liu, D.：“承受循环荷载的宽翼缘梁的横向屈曲行为和横向支撑”日本建筑学会结构与建筑工程学报。

Liu, D.: "Lateral buckling, post-buckling instability, and fracture of steel beams subjected to large cyclic deformations"Proceedings of the US-Japan Seminar on Advanced Stability and Seismicity Concept for Peformance-based Design of Steel and Composite S

刘丹：“大循环变形下钢梁的侧向屈曲、屈曲后失稳和断裂”美日钢与复合材料性能设计先进稳定性与抗震概念研讨会论文集

Nakashima M.: "Development, Potential, and Limitations of Real-Time Online Test"Proceedings of the International Symposium on Theory and Application of Structural Engineering Test Method, Beijing. 8-15 (1999)

Nakashima M.：“实时在线测试的发展、潜力和局限性”结构工程测试方法理论与应用国际研讨会论文集，北京。

金尾伊織: "繰り返し載荷を受けるH形鋼標準梁・RBS梁の横座屈と座屈後挙動"鋼構造年次論文報告書. 第9巻. 551-556 (2001)

Iori Kanao：“标准 H 型钢和 RBS 梁在重复荷载下的横向屈曲和后屈曲行为”钢结构年度论文报告第 9 卷 551-556 (2001)。