Numerical Simulation of One-way Reinforced Concrete Slabs Subjected to Blast Loadings
The damage and failure of reinforced concrete (RC) slabs under blast loadings may cause significant hazards for frame systems even progressive collapse of whole structures. The numerical simulation of oneway RC slabs using the finite element explicit code LS-DYNA to estimate the dynamic response and failure mode of one-way RC slabs .Blast loadings are imposed on the top surface of slabs using a blast model based on conwep algorithm. Concrete was modeled using a concrete damage constitutive model considering strain rate effect, and reinforcement was modeled using a elastoplastic material type with kinematic hardening and strain rate effect. The numerical model is introduced in details and adopted to simulate the dynamic responses of RC slabs in reference test. The numerical model can match well with the test data, and thus the proposed numerical model can be considered as a valuable tool in assessing the deformation or failure mechanism and predicting the dynamic responses of one-way RC slabs subjected to blast loadings. One-way slabs with different reinforcement designs, i.e. single layer of reinforcement and two layers of reinforcement, have been numerically studied with this model. The results show that slabs with one layer of reinforcement have higher deflection than slabs with two layers of reinforcement.
dynamic reponse reinforced concrete slab concrete damage model strain rate effect
Tianhua Li Junhai Zhao Xueying Wei Xiaoming Dong Wei Kong
School of Civil Engineering Changan University Xian, China Highway School Changan University Xian, China China State Construction Eng. Corp. Ltd. Beijing, China
国际会议
三峡
英文
1663-1666
2012-05-18（万方平台首次上网日期，不代表论文的发表时间）