Dynamic Response of Blast-Loaded RC Columns | ||
| Engineering Research Journal (Shoubra) | ||
| Volume 42, Issue 1, October 2019, Pages 116-122 PDF (935.21 K) | ||
| Document Type: Research articles | ||
| DOI: 10.21608/erjsh.2019.406621 | ||
| Authors | ||
| Fouad B. A. Beshara; Youssef M. H. Hammad; Mahmoud K. Ameen | ||
| Civil Engineering Department, Faculty of Engineering (Shoubra), Banha University | ||
| Abstract | ||
| This research paper presents a numerical procedure for predicting the nonlinear dynamic response of blast-loaded RC columns. A three-dimensional solid element and link element is used for spatial discretization of concrete and steel reinforcement, respectively. A summary of a rate- and history-dependent constitutive model is proposed for the progressive failure analysis of concrete under blast. The proposed model is an improved version of Riedel-Hiermaier- Thoma (RHT) model and accounts for different materials nonlinearities and strain rate sensitivity in compression and tension. The steel is modeled as a rate-dependent elasto-plastic material with strain hardening. The proposed model was implemented in the computer program AUTODYN. An explicit time integration scheme is followed for the nonlinear dynamic analysis. The proposed procedure was successfully used for predicting the dynamic response (failure modes, deflection-time histories, and acceleration-time curves) of several blast-loaded RC columns, tested before in the literatures. | ||
| Keywords | ||
| Blast loading; Reinforced concrete columns; Finite element modelling; Dynamic nonlinear analysis; RHT Concrete model; AUTODYN | ||
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