水平冲击荷载下K6型单层网壳结构抗冲击性能研究  

Shock resistance performance of K6 single-layer reticulated domes subjected to horizontal impact load

作　　者：马肖彤[1] 包超[1,2] 王秀丽[3] 张国庆[2] MA Xiao-tong BAO Chao WANG Xiu-li ZHANG Guo-qing(School of Civil Engineering, Bei fang University of Nationalities, Yinchuan 750021, China School of Civil Engineering, Lanzhou University of Technology, Lanzhou, 730050, China School of Civil Engineering, Ningxia University, Yinchuan 750021, China)

机构地区：[1]北方民族大学土木工程学院,宁夏银川750021 [2]宁夏大学土木与水利工程学院,宁夏银川750021 [3]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《空间结构》2016年第4期29-34,77,共7页Spatial Structures

基　　金：国家自然科学基金项目(51468054;51278236);宁夏高等学校科学研究项目(NGY2016150);北方民族大学引进人员科研启动经费资助(4400302545);北方民族大学校级项目(2016KY-002)

摘　　要：水平冲击荷载是更贴近于现实生活中外部物质碰撞、泥石流地质灾害、恐怖袭击等的冲击荷载类型.首先介绍了冲击荷载作用的分析方法,然后在ANSYS/LS-DYNA软件中建立了跨度60m的K6型单层球面网壳抗水平冲击模型,不断变换冲击物的质量和速度对结构进行冲击.结果表明,水平冲击荷载作用下结构的动力响应过程可以分为五个关键性阶段和三种冲击模式;随着冲击物质量与速度的不断增加,网壳水平向变形、主要杆件受力和冲击力会不断增大,当质量与速度增加到一定值后,三者均不再变化;在整个冲击过程中的能量损失会随冲击力的增大而增多.Horizontal impact load is closer to real life than other loads,such as external object collision,debris flow hazards,terrorist attacks,etc.Analysis method of impact action was introduced.Antihorizontal impact model of K6single-layer reticulated shell structure with a span of 60 mwas established by ANSYS/LS-DYNA,and the mass and velocity of the impactor have been changed to impact the shell.Result shows that dynamic response process of the structure can be divided into five key stages and three impact modes under horizontal impact load.Horizontal deformation,the force of the main bar and impact force continue to increase with the increase of the mass and velocity of the impact matter.When the mass and velocity increase to a certain value,they will no longer change.Energy loss also increases with the increase of impact force in the process of impact action.

关 键 词：单层球面网壳 水平冲击荷载 冲击模式 能量损失 动力响应 

分 类 号：TU393.3[建筑科学—结构工程]