Author(s): Zhou Qing Yu Tongxi
Pages: 207-213
Year: 1992 Issue:  3
Journal: Chinese Journal of Solid Mechanics
Keyword:  dynamic plastic response; Lcc’s extremum principle; evolutionary mode; large dcflcction; portal frame;
Abstract: An approximate method based on Lee’s extremum principle is introduced to study the large deflec-tions of dynamically loaded plastic structures.As an example,the evolutionary mode of an impulsivelyloaded rigid-perfectly plastic portal frame is determined and then compared with the experimental re-sults[8]and with the large deflection complete solution obtained previously[9].It is found that the evo-lutionary modal solution may approach the complete solution if the modes are appropriately chosen.