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《Journal of Tianjin University(Science and Technology)》 2015-S1
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Dynamic Responses of Single-Layer Spherical Steel Reticulated Shell Under Internal Explosions

Gao Xuanneng;Li Chao;Jiang Yuan;College of Civil Engineering,Huaqiao University;  
A numerical calculation model for simulating the internal explosions in the single-layer spherical steel reticulated shell was established by using LS-DYNA. Based on the model,the numerical simulation and calculation of dynamic responses of the single-layer spherical steel reticulated shell were carried out under internal explosions,and the influences of the TNT equivalence of dynamite,the rise-to-span ratio and the position of explosions on the dynamic responses of the spherical steel reticulated shell were analyzed and discussed. The results showed that the maximum displacement and stress responses of the single-layer spherical steel reticulated shell under the internal explosions increase with increasing TNT equivalence of dynamite,but the increasing rate of the maximum stress response is less than that of the maximum displacement response. The maximum displacement and stress responses of the shell decrease nonlinearly with the increase of the rise-to-span ratio,and the bigger the rise-to-span ratio and the smaller the span of the shell,the stronger the capacity of resistance to(anti-)explosive shock waves. The numerical results also revealed that the eccentric explosions within 1/4 span range adjacent to the supports of the shell are the most disadvantageous to the structure,indicating that the design control parameters for explosion-proof and anti-explosion design should be chosen according to eccentric explosion effects.
【Fund】: 国家自然科学基金资助项目(51278208);; 福建省科技计划重大资助项目(2012Y4010);; 福建省自然科学基金资助项目(2011J01319)
【CateGory Index】: O381
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