超高韧性水泥基复合材料功能梯度板接触爆炸数值模拟  

NUMERICAL SIMULATION OF FUNCTIONALLY GRADED SLABS OF ULTRA-HIGH TOUGHNESS CEMENTITIOUS COMPOSITES UNDER CONTACT EXPLOSION

作　　者：徐世烺[1] 李锐[1] 李庆华[1] 陈柏锟 XU Shi-lang;LI Rui;LI Qing-hua;CHEN Bo-kun(Institute of Advanced Engineering Structures and Materials,Zhejiang University,Hangzhou,Zhejiang 310058,China)

机构地区：[1]浙江大学高性能建筑结构与材料研究所,浙江杭州310058

出　　处：《工程力学》2020年第8期123-133,178,共12页Engineering Mechanics

基　　金：国家自然科学基金项目(51878601,51678522)。

摘　　要：超高韧性水泥基复合材料(Ultra-High Toughness Cementitious Composites,UHTCC)具有优异的韧性和吸能效果,采用UHTCC和UHPC材料制成的功能梯度板具有优越的抵抗爆炸冲击性能。为了更好地研究UHTCC材料在爆炸荷载下的损伤规律,设计出性能优良的防护结构,该文利用LS-DYNA软件对UHTCC功能梯度板接触爆炸进行了数值模拟。探讨了靶体材料、炸药量、配筋情况、能量吸收层厚度对结构抗爆性能的影响。研究结果表明,UHTCC功能梯度板可以有效减少爆炸荷载下的开坑、震塌以及靶体损伤,同时吸收更多的爆炸冲击波,从而达到优良的抗爆效果。配置拉结筋并合理设置能量吸收层厚度能有效减少靶体损伤。Ultra-high toughness cementitious composites(UHTCC)have excellent performance in toughness and energy absorption.The damage law of UHTCC functionally graded slabs under contact explosion is numerically investigated using LS-DYNA software to design a protective structure with excellent performance.The antiexplosion property of the structure is discussed considering the effects of the target material,explosive content,reinforcement arrangement and energy absorption layer thickness.The results show that the UHTCC functionally graded slabs exhibit excellent blast resistance under blast loading as a consequence of the reduction of craters,scabbing and target damage,and the increase in blast waves absorption.Especially,the target damage can be effectively reduced by arranging the tie ribs and rationally setting the thickness of the energy absorption layer.

关 键 词：超高韧性水泥基复合材料 数值模拟 抗爆性能 功能梯度 防护结构 

分 类 号：TU528.0[建筑科学—建筑技术科学]