反复动载作用下结构的伪安定问题  

THE PSEUDO-SHAKEDOWN OF STRUCTURES UNDER REPEATED DYNAMIC LOADS

作　　者：黄震球[1] 

机构地区：[1]华中理工大学,武汉430074

出　　处：《工程力学》1997年第1期79-86,共8页Engineering Mechanics

摘　　要：根据能量准则,详细讨论了反复动载作用下两端固定梁的伪安定现象.分析表明:结构吸收的弹性变形能将随塑性变形的增长而不断增加。当结构因变形所吸收的弹性变形能在数值上等于外载所作的功时,该结构便达到伪安定状态.Based on energy criterion,pseudo-shakedown phenomenon of two-end- fixed beams under repeated dynamic loads is discussed in detail in this paper.It is shown that, the elastic strain energy absorbed in the structure increases with of the plastic deformation of the structure,the structure will reach a pseudo-shakedown state when the possible elastic strain energy to be absorbed in the deformed structure equals to the external work of the dy- namic load in magnitude.

关 键 词：结构 动载 伪安定 弹塑性分析 能量准则 梁 

分 类 号：TU323.301[建筑科学—结构工程]