| Title |
Nonlinear Explosion Analyses for Damage Assessments of Reinforced Concrete Structures |
| Authors |
허택녕(Huh, Taik Nyung) ; 김성윤(Kim, Seong Yun) |
| DOI |
https://doi.org/10.12652/Ksce.2017.37.1.0001 |
| Keywords |
폭발해석;RHT (Riedel-Thoma-Hiermaier) 콘크리트 파괴모델;Johnson Cook 모델;손상도 평가;철근콘크리트 슬래브의 내폭성능 Explosion analysis;RHT (Riedel-Thoma-Hiermaier) concrete failure model;Johnson cook model;Damage assessment;Anti-knock capacity |
| Abstract |
In general, the large loads which are applied from explosion, impact, earthquake and wind at a short time caused the materials of structures to large deformations, rotations and strains locally. If such phenomena will be analyzed, hydrocodes which can be considered fluid-structure interaction under computational continuum mechanics are inevitably needed. Also, the explosion mechanism is so complicated, it is reasonable that the behaviors of structure are predicted through explosion analyses and experiment at the same time. But, unfortunately, it is true that explosion experiments are limited to huge cost, large experiment facilities and safety problems. Therefore, in this study, it is shown that the results of explosion analyses using the AUTODYN are agreed with those of existing explosion experiments for reinforced concrete slabs within reasonable error limits. And the explosion damage of the same reinforced concrete slab are assessed for quite different reinforcement arrangement spacings, concrete cover depths, and vertical reinforcements. From the explosion analyses, it is known that the more the ratio of slab thickness to reinforcement arrangement spacing is increased, and small-diameter reinforcements are used than large-diameter reinforcements on the same reinforcement ratio, and vertical reinforcements are used, the more the anti-knock capacities are improved. |