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A platform for research: civil engineering, architecture and urbanism
Comparative Study Considering Spatial Influence on the Pushover Behaviour of the Bridge Abutment
Bridge abutments are one of the most important parts of the bridge system that transfer some part of load coming through the girders to the compacted backfill soil and other part to the foundation. The movement of the abutment wall generates a sufficient amount of lateral pressure into the backfill which is resisted by the shear capacity of soil. Once the capacity is reached, it will cause failure of the end support system of the bridge and hence the chances of the bridge failure get elevated. Thus, it is necessary to investigate the response of the bridge abutment under lateral loading. In the present study, a 2D numerical model of the UCLA abutment-backfill experiment is developed via OpenSees platform. Pressure dependent constitutive soil (PDMY02) available in OpenSees is used to model the behavior of backfill soil against monotonic lateral loading. Sensitivity analyses are accomplished to examine the susceptibleness of the maximum lateral force demand to the soil model parameters. Considering the most influential soil model parameter as a random variable, the spatial variability effect of the backfill soil domain is studied further. For different values of correlation distance (θ) and coefficient of variation (COV), the random fields are generated. Besides the importance of cross-correlated properties are examined considering the inter-dependence of the most influential parameter with the second and third important parameters of the soil model. Based on the results, a comparative study are carried out among the deterministic, single random variable and cross-correlated cases.
Comparative Study Considering Spatial Influence on the Pushover Behaviour of the Bridge Abutment
Bridge abutments are one of the most important parts of the bridge system that transfer some part of load coming through the girders to the compacted backfill soil and other part to the foundation. The movement of the abutment wall generates a sufficient amount of lateral pressure into the backfill which is resisted by the shear capacity of soil. Once the capacity is reached, it will cause failure of the end support system of the bridge and hence the chances of the bridge failure get elevated. Thus, it is necessary to investigate the response of the bridge abutment under lateral loading. In the present study, a 2D numerical model of the UCLA abutment-backfill experiment is developed via OpenSees platform. Pressure dependent constitutive soil (PDMY02) available in OpenSees is used to model the behavior of backfill soil against monotonic lateral loading. Sensitivity analyses are accomplished to examine the susceptibleness of the maximum lateral force demand to the soil model parameters. Considering the most influential soil model parameter as a random variable, the spatial variability effect of the backfill soil domain is studied further. For different values of correlation distance (θ) and coefficient of variation (COV), the random fields are generated. Besides the importance of cross-correlated properties are examined considering the inter-dependence of the most influential parameter with the second and third important parameters of the soil model. Based on the results, a comparative study are carried out among the deterministic, single random variable and cross-correlated cases.
Comparative Study Considering Spatial Influence on the Pushover Behaviour of the Bridge Abutment
Lecture Notes in Civil Engineering
Di Trapani, Fabio (editor) / Demartino, Cristoforo (editor) / Marano, Giuseppe Carlo (editor) / Monti, Giorgio (editor) / Bagchi, Aritra (author) / Raychowdhury, Prishati (author)
Eurasian Conference on OpenSees ; 2022 ; Turin, Italy
2023-04-20
14 pages
Article/Chapter (Book)
Electronic Resource
English
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