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Numerical study on the residual axial capacity of ultra high performance cementitious composite filled steel tube (UHPCC-FST) column under contact explosion
Abstract Ultra high performance cementitious composites filled steel tube (UHPCC-FST) column has been widely applied as the load bearing members for long-span bridges, which are the potential bomb explosion attacking targets in terroristic activities. In the authors’ previous work, the residual axial load bearing capacity of UHPCC-FST specimens under contact explosion was investigated experimentally, and this paper further perform the corresponding numerical simulation study. By utilizing the multi-material Arbitrary Lagrange-Euler (ALE) algorithm, Fluid-Structure Interaction (FSI) method, the restart input data method and element erosion algorithm implemented in the finite element (FE) code LS-DYNA, the numerical simulations corresponding to the contact charge explosion and the following axial compression tests are carried out. The damage and failure modes of UHPCC-FST specimen are reproduced and validated by comparing with the experimental data. Furthermore, the related parametric influences, e.g., thickness and strength of steel tube, compressive strength of core concrete and column diameter, on the local blast formed crater depth, the post-blast residual axial load bearing capacity, as well as the corresponding damage index of UHPCC-FST specimen under contact detonation are discussed. The influential degree of above parameters on the residual axial capacity of UHPCC-FST specimen under contact explosion is clarified. The present work can provide helpful references for evaluating the post-blast performance as well as the design of UHPCC-FST specimen under contact explosion.
Highlights High-fidety numerical simulations of contact explosion and subsequent axial compression tests on UHPCC-FST are performed. Validations of the adopted numerical algorithms, FE model, and modified constitutive model parameters of UHPCC are verified. Parametric influences on local crater depth and post-blast residual axial load bearing capacity, etc. are discussed.
Numerical study on the residual axial capacity of ultra high performance cementitious composite filled steel tube (UHPCC-FST) column under contact explosion
Abstract Ultra high performance cementitious composites filled steel tube (UHPCC-FST) column has been widely applied as the load bearing members for long-span bridges, which are the potential bomb explosion attacking targets in terroristic activities. In the authors’ previous work, the residual axial load bearing capacity of UHPCC-FST specimens under contact explosion was investigated experimentally, and this paper further perform the corresponding numerical simulation study. By utilizing the multi-material Arbitrary Lagrange-Euler (ALE) algorithm, Fluid-Structure Interaction (FSI) method, the restart input data method and element erosion algorithm implemented in the finite element (FE) code LS-DYNA, the numerical simulations corresponding to the contact charge explosion and the following axial compression tests are carried out. The damage and failure modes of UHPCC-FST specimen are reproduced and validated by comparing with the experimental data. Furthermore, the related parametric influences, e.g., thickness and strength of steel tube, compressive strength of core concrete and column diameter, on the local blast formed crater depth, the post-blast residual axial load bearing capacity, as well as the corresponding damage index of UHPCC-FST specimen under contact detonation are discussed. The influential degree of above parameters on the residual axial capacity of UHPCC-FST specimen under contact explosion is clarified. The present work can provide helpful references for evaluating the post-blast performance as well as the design of UHPCC-FST specimen under contact explosion.
Highlights High-fidety numerical simulations of contact explosion and subsequent axial compression tests on UHPCC-FST are performed. Validations of the adopted numerical algorithms, FE model, and modified constitutive model parameters of UHPCC are verified. Parametric influences on local crater depth and post-blast residual axial load bearing capacity, etc. are discussed.
Numerical study on the residual axial capacity of ultra high performance cementitious composite filled steel tube (UHPCC-FST) column under contact explosion
Wang, Z.G. (author) / Wu, H. (author) / Fang, Q. (author) / Wu, J. (author)
Thin-Walled Structures ; 153
2020-05-14
Article (Journal)
Electronic Resource
English
Theoretical study of UHPCC composite column behaviors under axial compression
| British Library Online Contents | 2015