王建国;罗世云;张智宇;马军;张小华;
WANG Jian-guo;LUO Shi-yun;ZHANG Zhi-yu;MA Jun;ZHANG Xiao-hua;Faculty of Land Resources Engineering, Kunming University of Science and Technology;Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co., Ltd.;

• 1:昆明理工大学国土资源工程学院
• 2:云南省中-德蓝色矿山与特殊地下空间开发利用重点实验室
• 3:中国有色金属工业昆明勘察设计研究院有限公司

摘要(Abstract)：

为了研究工程爆破或地震等动荷载冲击作用下不同砌筑防护结构材料的动态响应特性,通过SHPB冲击实验,对含软夹层的砂浆试件在不同速度下的动态响应、能量传递规律和损伤破坏特性展开研究。研究表明:软夹层延缓了层状材料动态抗压强度的增长速率,软夹层组合试件的抗冲击速度值比完整试件提高了19.5%;冲击速度大于4.448 m/s时,反射能量加剧增大、透射能量逐渐减少,耗散能及能耗比均呈线性增大;在3.316～5.152 m/s的冲击速度范围内,损伤变量与冲击速度呈二次多项式变化关系,试件破坏时的损伤值约为0.62。研究结果为动载下组合材料防护结构的选型设计提供参考。
In order to research the dynamic response characteristics of different masonry protective structural materials under dynamic loads such as engineering blasting or earthquake,SHPB impact test was conducted to study the dynamic response, energy transfer law and damage characteristics of mortar specimens with soft interlayer at different velocity. The research shows that the soft interlayer retards the growth rate of dynamic compressive strength of layered materials and the resistance impact velocity of the soft interlayer composite specimens is 19.5% higher than that of the complete specimen. When the impact velocity is greater than 4.448 m/s, the reflected energy increases rapidly while the transmitted energy decreases gradually, the dissipated energy and energy consumption ratio increase linearly. Within the impact velocity range of 3.316-5.152 m/s, the relationship between the damage variable and the impact velocity is quadratic polynomial, and the damage value of the interlayer specimen is about 0.62. The research results provide reference for the type selection design of composite material protection structure under dynamic load.

关键词(KeyWords)： 冲击荷载;软夹层砂浆;动态破坏;能耗比;损伤变量
impact loading;soft interlayer mortar;dynamic failure;energy consumption ratio;damage variable

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(52064025);; 2019云南省博士后基金资助项目(2019-108);; 昆明理工大学博士后经费资助项目(10988856)

作者(Authors): 王建国;罗世云;张智宇;马军;张小华;
WANG Jian-guo;LUO Shi-yun;ZHANG Zhi-yu;MA Jun;ZHANG Xiao-hua;Faculty of Land Resources Engineering, Kunming University of Science and Technology;Yunnan Key Laboratory of Sino-German Blue Mining and Utilization of Special Underground Space;Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co., Ltd.;

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