Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Coupled Effects of Static Creep, Cyclic Creep, and Damage on the Long-Term Performance of Prestressed Concrete Bridges: A Case Study Based on Rate-Type Formulation
One of the challenges in bridge engineering is to predict the long-term deflection and damage accumulation in large-span prestressed concrete girders during their lifespan. For prestressed concrete bridges, a salient by-product of time-dependent deformation resulting primarily from concrete creep is unexpected stress redistribution, which triggers damage and cracking in the critical structural components. To deepen the understanding of the coupled effects of deflection and damage on bridge performance, a case study is carried out in this investigation, in which a large-span prestressed concrete bridge is modeled in ABAQUS based on its blueprints available. To capture the concrete behavior during service, a constitutive law formulated based on a damage model is employed to approximate the nonlinear softening after concrete cracking. This formulation is further integrated with a rheological model resting on Kelvin units for concrete creep. Using a rate-type algorithm, the long-term behavior of the bridge is probed.
Coupled Effects of Static Creep, Cyclic Creep, and Damage on the Long-Term Performance of Prestressed Concrete Bridges: A Case Study Based on Rate-Type Formulation
One of the challenges in bridge engineering is to predict the long-term deflection and damage accumulation in large-span prestressed concrete girders during their lifespan. For prestressed concrete bridges, a salient by-product of time-dependent deformation resulting primarily from concrete creep is unexpected stress redistribution, which triggers damage and cracking in the critical structural components. To deepen the understanding of the coupled effects of deflection and damage on bridge performance, a case study is carried out in this investigation, in which a large-span prestressed concrete bridge is modeled in ABAQUS based on its blueprints available. To capture the concrete behavior during service, a constitutive law formulated based on a damage model is employed to approximate the nonlinear softening after concrete cracking. This formulation is further integrated with a rheological model resting on Kelvin units for concrete creep. Using a rate-type algorithm, the long-term behavior of the bridge is probed.
Coupled Effects of Static Creep, Cyclic Creep, and Damage on the Long-Term Performance of Prestressed Concrete Bridges: A Case Study Based on Rate-Type Formulation
Yu, Qiang (Autor:in) / Tong, Teng (Autor:in)
10th International Conference on Mechanics and Physics of Creep, Shrinkage, and Durability of Concrete and Concrete Structures ; 2015 ; Vienna, Austria
CONCREEP 10 ; 229-237
18.09.2015
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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