摘要
为研究单层球面网壳结构在多点冲击荷载作用下的失效机理,在ANSYS/LS-DYNA中建立了60m跨度的Kiewitt 6型单层球面网壳结构的有限元模型,将整个网壳结构沿肋杆分成6个不同扇区,沿环杆分成5个不同环区,分别对网壳结构在同一环区和同一扇区受到多点冲击时的动力响应及冲击全过程能量传递的规律进行了分析研究。基于网壳结构失效变形特点,定义了多点冲击荷载作用下单层球面网壳结构的4类失效模式;根据整个冲击过程中能量的传递特点,揭示了单层球面网壳结构每类失效模式所对应的失效机理。
To study the failure mechanism of single-layer spherical reticulated shell structures under multi-point impact loading,a finite element model of a Kiewitt-6-type single-layer reticulated shell with a 60 m span is established in ANSYS/LS-DYNA.The reticulated shell structure is divided into six sectors along the rib rod and divided into five ring zones along the ring bar;each area has an impact point.The dynamic response and energy transfer rule during the impact process of the reticulated shell structure under the combination of different impact regions are analyzed.Four failure modes of the single-layer spherical reticulated shell structure under multipoint impacts are defined based on the failure and deformation characteristics of the lattice shell structure,and the corresponding failure mechanism of each failure mode is revealed according to the energy transfer characteristics of the entire impact process.
作者
吴长
苟宝龙
李冬杰
田野
WU Chang;GOU Baolong;LI Dongjie;TIAN Ye(Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province,Lanzhou University of Technology,Lanzhou 730050,Gansu,China;Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou 730050,Gansu,China)
出处
《地震工程学报》
CSCD
北大核心
2018年第5期969-975,共7页
China Earthquake Engineering Journal
基金
国家自然科学基金项目资助(51608245)
关键词
网壳结构
多点冲击
失效模式
失效机理
reticulated shell structure
multipoint impact
failure mode
failure mechanism
