摘要
基于对单向受弯角钢构件的研究,发现了一种尚未被结构稳定理论所深入探讨的构件整体失稳模式,称之为“非分支型变形突变模式”。讨论了这种失稳模式在临界点路径唯一性上和引发机制上与经典分支型失稳、极值型失稳的区别。考察了具有这种特征的失稳模式在其他场景中的表现和触发机制,表明这类失稳并非局限于某一特定截面构件、特定受力方式和特定的产生原因,但其具有共性规律。分析了对这类失稳现象和机理进行深入研究的必要性和主要研究内容。
Based on the study on steel angle members subject to unidirectional bending around the major axis,a global instability mode that has not been deeply explored in structural stability theory was discovered,which is called‘non-bifurcation instability accompanied with abrupt deformation mode change’.The differences between this instability mode and the classic bifurcation instability and ultimate instability are discussed in terms of the uniqueness of the deformation routine at the critical point,as well as the triggering mechanism.It is further shown that the featured instability can be possible in other background and with other triggering mechanism,indicating that this type of instability is not limited to a specific cross-section member,a specific force mode,or a specific cause,but it has common laws.The necessity for thorough study on the potential instable behavior and mechanism,as well as the research contents,is proposed.
作者
陈以一
黄德键
廖芳芳
程欣
曹强
CHEN Yi-yi;HUANG De-jian;LIAO Fang-fang;CHENG Xin;CAO Qiang(School of Engineering,Shanghai Sanda University,Shanghai 201209,China;College of Civil Engineering,Tongji University,Shanghai 200092,China;School of Civil Engineering,Chang’an University,Xi’an,Shaanxi 710061,China;College of Civil Engineering,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)
出处
《工程力学》
北大核心
2025年第2期15-23,共9页
Engineering Mechanics
基金
国家自然科学基金面上项目(52378168)。
关键词
构件整体失稳
角钢
应力塑性重分布
多重失稳相互影响
工程应用研究
member’s global instability
steel angle
stress redistribution plastically
inter-influence of multibuckling modes
study for engineering application
