A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Damage Analysis of a Tunnel Under Rigid and Deformable Impactors
https://orcid.org/0000-0001-5221-0139
Abstract Missile impacts on underground structures pose significant safety concerns, necessitating thorough investigation to enhance the resilience and safety of such infrastructures. This study aims to evaluate the effects of missile impacts on underground structures by comparing the impact of rigid and deformable impactors using advanced simulation techniques. The simulation of 3D models of impact scenarios on underground structure was carried out using ANSYS/LSDYNA software. The simulations focused on assessing the differences in damage caused by rigid and deformable impactors. Due to the symmetry of the geometry and loading, a quarter of the model was simulated to reduce calculation time. Various material models were employed, including MAT_RHT for rock, MAT_CSCM_CONCRETE for concrete, and MAT_PLASTIC_KINEMATIC for rebars and impactors. Different contact algorithms and boundary conditions were applied to replicate real-world scenarios accurately. Our analysis revealed that employing a deformable impactor significantly reduces the damage to both the ground and the tunnel lining compared to a rigid impactor. Specifically, the velocities observed for rigid and deformable impactors were 91.8 and 65.7 m/s, respectively. Validation of the numerical model was achieved through comparison with experimental data on RC beams subjected to impact, demonstrating the model’s reliability in predicting impact responses. Our findings underscore the critical influence of impactor material behaviour on damage outcomes. The results advocate for the consideration of nonrigid materials in impact assessments for stiff structures, contributing to enhanced safety protocols and design strategies for underground infrastructure.
Damage Analysis of a Tunnel Under Rigid and Deformable Impactors
https://orcid.org/0000-0001-5221-0139
Abstract Missile impacts on underground structures pose significant safety concerns, necessitating thorough investigation to enhance the resilience and safety of such infrastructures. This study aims to evaluate the effects of missile impacts on underground structures by comparing the impact of rigid and deformable impactors using advanced simulation techniques. The simulation of 3D models of impact scenarios on underground structure was carried out using ANSYS/LSDYNA software. The simulations focused on assessing the differences in damage caused by rigid and deformable impactors. Due to the symmetry of the geometry and loading, a quarter of the model was simulated to reduce calculation time. Various material models were employed, including MAT_RHT for rock, MAT_CSCM_CONCRETE for concrete, and MAT_PLASTIC_KINEMATIC for rebars and impactors. Different contact algorithms and boundary conditions were applied to replicate real-world scenarios accurately. Our analysis revealed that employing a deformable impactor significantly reduces the damage to both the ground and the tunnel lining compared to a rigid impactor. Specifically, the velocities observed for rigid and deformable impactors were 91.8 and 65.7 m/s, respectively. Validation of the numerical model was achieved through comparison with experimental data on RC beams subjected to impact, demonstrating the model’s reliability in predicting impact responses. Our findings underscore the critical influence of impactor material behaviour on damage outcomes. The results advocate for the consideration of nonrigid materials in impact assessments for stiff structures, contributing to enhanced safety protocols and design strategies for underground infrastructure.
Damage Analysis of a Tunnel Under Rigid and Deformable Impactors
https://orcid.org/0000-0001-5221-0139
Abstract Missile impacts on underground structures pose significant safety concerns, necessitating thorough investigation to enhance the resilience and safety of such infrastructures. This study aims to evaluate the effects of missile impacts on underground structures by comparing the impact of rigid and deformable impactors using advanced simulation techniques. The simulation of 3D models of impact scenarios on underground structure was carried out using ANSYS/LSDYNA software. The simulations focused on assessing the differences in damage caused by rigid and deformable impactors. Due to the symmetry of the geometry and loading, a quarter of the model was simulated to reduce calculation time. Various material models were employed, including MAT_RHT for rock, MAT_CSCM_CONCRETE for concrete, and MAT_PLASTIC_KINEMATIC for rebars and impactors. Different contact algorithms and boundary conditions were applied to replicate real-world scenarios accurately. Our analysis revealed that employing a deformable impactor significantly reduces the damage to both the ground and the tunnel lining compared to a rigid impactor. Specifically, the velocities observed for rigid and deformable impactors were 91.8 and 65.7 m/s, respectively. Validation of the numerical model was achieved through comparison with experimental data on RC beams subjected to impact, demonstrating the model’s reliability in predicting impact responses. Our findings underscore the critical influence of impactor material behaviour on damage outcomes. The results advocate for the consideration of nonrigid materials in impact assessments for stiff structures, contributing to enhanced safety protocols and design strategies for underground infrastructure.
Damage Analysis of a Tunnel Under Rigid and Deformable Impactors
Geotech Geol Eng
Khan, Arif (author) / Yong, Fang (author) / Yifan, Jiang (author) / Hajivand Dastgerdi, Rashid (author)
2025-01-01
Article (Journal)
Electronic Resource
English
Damage Analysis of a Tunnel Under Rigid and Deformable Impactors
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