何庆锋,易伟建

• 1:湖南大学土木工程学院

摘要(Abstract)：

为研究钢筋混凝土空间框架结构的抗倒塌性能,采用爆破方式对一4层2跨2开间的RC框架结构短边中柱和角柱进行了快速移除倒塌试验,通过试验获取了爆破移除框架柱作用过程、结构的动力响应、柱的失效时间和空间空腹梁对荷载分布的影响等数据。试验结果表明:试验框架在快速移除边中柱与角柱后,柱头位移较小,结构没有发生倒塌,处于弹性变形范围。爆炸引起RC框架柱的失效时间约100 ms,结构变形晚于爆炸应力波40 ms左右。在爆破过程中,柱内纵向钢筋在应力波和爆轰气体压力共同作用下向外严重鼓曲变形,对上部结构产生较大的拉伸作用,加大了结构倒塌风险。横向或纵向的空间空腹梁作用是结构在柱失效后的荷载重分布的主要受力机理。

关键词(KeyWords)： 爆破试验;连续倒塌;倒塌试验;失效时间

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51108170);; 中央高校基本科研业务费;; 国家重点专项(2016YFC0701400)

作者(Author): 何庆锋,易伟建

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