Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Behavior of unbonded prestressed concrete slabs subjected to low-velocity impact loading
Abstract This study examines the structural performance of unbonded prestressed concrete slabs subjected to low-velocity impact loading. The experiment involved impact loading tests on reinforced concrete (RC) slabs and prestressed concrete (PC) slabs using a drop hammer impact test system. The prestressing force was monitored using intelligent steel strands before the PC slabs were subjected to impact testing. The failure mode, impact force, and displacement response of the specimens were recorded. The study investigated the effects of impact energy, prestress level, and boundary conditions on dynamic damage and response of the specimens. Results showed that RC slabs and unidirectional simply supported PC (PCU) slabs exhibited typical flexural failure modes, while bidirectional supported PC (PCB) slabs experienced a combination of flexural and shear failure modes. Furthermore, PC slabs demonstrated superior impact resistance. A finite element (FE) model was developed to predict the impact behavior of RC and PC slabs and was validated using the failure modes, impact forces, and displacements obtained from the experimental results. The impact process and energy dissipation were also analyzed using the FE model.
Highlights A series of drop hammer impact tests were conducted on reinforced concrete (RC) and prestressed concrete (PC) slabs. The prestressing force was monitored using intelligent steel strands before the PC slabs were subjected to impact testing. The impact response of the PC slab under loading can be categorized into three stages. The impact resistance effect of the prestress level and support condition on the PC slabs was obtained. A refined finite element model was established to study the behavior of specimens
Behavior of unbonded prestressed concrete slabs subjected to low-velocity impact loading
Abstract This study examines the structural performance of unbonded prestressed concrete slabs subjected to low-velocity impact loading. The experiment involved impact loading tests on reinforced concrete (RC) slabs and prestressed concrete (PC) slabs using a drop hammer impact test system. The prestressing force was monitored using intelligent steel strands before the PC slabs were subjected to impact testing. The failure mode, impact force, and displacement response of the specimens were recorded. The study investigated the effects of impact energy, prestress level, and boundary conditions on dynamic damage and response of the specimens. Results showed that RC slabs and unidirectional simply supported PC (PCU) slabs exhibited typical flexural failure modes, while bidirectional supported PC (PCB) slabs experienced a combination of flexural and shear failure modes. Furthermore, PC slabs demonstrated superior impact resistance. A finite element (FE) model was developed to predict the impact behavior of RC and PC slabs and was validated using the failure modes, impact forces, and displacements obtained from the experimental results. The impact process and energy dissipation were also analyzed using the FE model.
Highlights A series of drop hammer impact tests were conducted on reinforced concrete (RC) and prestressed concrete (PC) slabs. The prestressing force was monitored using intelligent steel strands before the PC slabs were subjected to impact testing. The impact response of the PC slab under loading can be categorized into three stages. The impact resistance effect of the prestress level and support condition on the PC slabs was obtained. A refined finite element model was established to study the behavior of specimens
Behavior of unbonded prestressed concrete slabs subjected to low-velocity impact loading
Li, Changkai (Autor:in) / Zhi, Xudong (Autor:in) / Song, Mengyan (Autor:in) / Lan, Chunguang (Autor:in) / Li, Shaopeng (Autor:in) / Fan, Feng (Autor:in)
Engineering Structures ; 308
08.04.2024
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Response of unbonded prestressed concrete continuous slabs under fire exposure
| Online Contents | 2013
| British Library Online Contents | 2013