【作者】 陈以一； 黄德键； 廖芳芳； 程欣； 曹强；

【Author】 CHEN Yi-yi;HUANG De-jian;LIAO Fang-fang;CHENG Xin;CAO Qiang;School of Engineering, Shanghai Sanda University;College of Civil Engineering, Tongji University;School of Civil Engineering, Chang’an University;College of Civil Engineering, Taiyuan University of Technology;

【机构】 上海杉达学院工程学院； 同济大学土木工程学院； 长安大学建筑工程学院； 太原理工大学土木工程学院；

【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。更多还原

【Abstract】 Based on the research on single steel angle members subject to bending around the major axis of its section, a global instability phenomenon occurred at structural members which has not yet deeply studied by current stability theory is detected. This newly discovered instability mode is called ’non-bifurcation instability accompanied with abrupt deformation mode change’. The different characters of the mode from that of bifurcation instability and ultimate instability are discussed, mainly including the uniqueness of deformation routine at the critical point, as well as the triggering mechanism. Further study shows that the featured instability can be possible in other background and with other triggering mechanism, indicating that this type of instability is not limited in given sectional member, under given loading condition and with given induced causes, but possesses some common regular rules, The necessity for thorough study about the potential instable behavior and mechanism, as well as the research contents are proposed.更多还原