防灾减灾工程学报2018，Vol.38Issue(1)：94-102,9.DOI:10.13409/j.cnki.jdpme.2018.01.013
内爆炸下肋环型球面钢网壳的泄爆阈值研究
Study on the Explosion Venting Threshold of Ribbed-type Spherical Steel Reticulated Shell under Internal Explosions
摘要
Abstract
A numerical model for ribbed-type spherical steel reticulated shell under internal center explosion which contained TNT,reticulated shell member,girder,column,ground,building envelope(wall and roof) and connection member was established by using the finite element software LS-DYNA.Based on this model,the influences of TNT equivalence and tensile stiffness of connection member on the failure mode of wall and roof were calculated and analyzed.The failure modes of wall and roof were classified and the limit overpressure △Pflim (explosion venting threshold) for various failure modes was obtained by extracting the shock wave pressure data of finite points on building envelope surface.The numerical results show that:(1) tensile stiffness of connection member and TNT equivalence of dynamite have a significant impact on the failure of wall and roof,when the TNT equivalence of dynamite is constant,the greater the tensile stiffness of the connection member is,the lower the destruction degree of the envelope,(2) the variation range of explosion venting threshold and tensile stiffness of connection member which was established by failure modes of wall and roof can provide effective reference for explosion venting design.关键词
内爆炸/肋环型球壳/围护结构/连接构件/抗拉刚度/泄爆阈值Key words
internal explosions/ribbed-type reticulated shell/building envelope/connection member/tensile stiffness/explosion venting threshold分类
数理科学引用本文复制引用
徐毅君,高轩能,乐李辉..内爆炸下肋环型球面钢网壳的泄爆阈值研究[J].防灾减灾工程学报,2018,38(1):94-102,9.基金项目
国家自然科学基金项目(51278208)、福建省科技计划重大项目(2012Y4010)资助 （51278208）
