许凯,黄艳,鲁光涛,冯谦

• 1:武汉科技大学城市建设学院
• 2:武汉科技大学高性能工程结构研究院
• 3:冶金装备及其控制教育部重点实验室(武汉科技大学)
• 4:中国地震局地震研究所

摘要(Abstract)：

爆炸荷载可能造成钢筋混凝土(RC)结构的严重破坏。在混凝土材料中掺入玄武岩纤维(BF)是提高钢筋混凝土构件抗爆炸性能的一种手段。梁是钢筋混凝土结构中的重要承载和联系构件。提高梁的抗爆性能可以提高结构的整体抗冲击性能。为了探究爆炸荷载作用下玄武岩纤维增强混凝土(BFRC)梁的抗爆性能，选取3根不同玄武岩纤维体积率(0%、0.1%和0.2%)的试验梁施加爆炸荷载。利用加速度计和应变片监测梁的动态响应，采用嵌入式压电智能骨料监测试验梁在爆炸下构件内部的损伤状况，从试验结果可以看到，在爆炸荷载作用下，与普通RC梁对比，BFRC梁的应变峰值与加速度峰值较小，梁的表面裂纹较少，剥落面积较小。运用小波包能量分析计算梁的损伤指数并以此对比判断BFRC梁在不同炸药当量下产生的内部损伤，研究了不同玄武岩纤维体积掺入率混凝土梁抗爆性能的变化。试验结果表明：掺入玄武岩纤维可以提高混凝土梁的抗爆性能，当玄武岩体积掺入率为0.2%时梁的损伤程度显著下降。

关键词(KeyWords)： 爆炸荷载;损伤监测;压电智能骨料;玄武岩纤维;纤维体积含量

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金面上项目(51878628);国家自然科学基金项目青年基金(51808417);; 湖北省教育厅科学技术研究计划指导性项目(B2019011)

作者(Author): 许凯,黄艳,鲁光涛,冯谦

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