建筑结构学报2012，Vol.33Issue(2)：64-71,8.
爆炸荷载作用下梁板结构反弹机理分析
Rebound mechanism analysis in beams and slabs subjected to blast loading
摘要
Abstract
The rebound mechanisms of the elastic response of beams and slabs subjected to blast loading were proposed with the equivalent single degree of freedom（SDOF） method and the distributed parameter system, respectively. The elastic rebound curves of single degree system subjected to five common loads were also given. The research further establishes a finite element model of typical stiffener steel plate for the numerical simulation of the plastic response to investigate by the rebound mechanism. The results show that the rebound will be more severe with the shorter duration, when the duration is infinity, and the rebound resistance is about 50% of the positive resistance. The effect of the changes of load shape on the rebound can not be neglected. The 30% reduction effect of damping should be considered in the practical design as the effect of damping ratio on rebound is obvious. In the phase of the plastic response, the rebound will be decreased, with the rebound laws similar to that in the elastic phase.关键词
爆炸荷载/梁板结构/有限元分析/反弹机理/等效单自由度体系/分布参数体系Key words
blast load/beam and slab/FEA/rebound mechanism/equivalent SDOF/distributed parameter system分类
建筑与水利引用本文复制引用
郭东,刘晶波,闫秋实..爆炸荷载作用下梁板结构反弹机理分析[J].建筑结构学报,2012,33(2):64-71,8.基金项目
国家自然科学基金重点项目（50678094）. （）
