Exploring influence of sectional flexural yielding on experimental pile response analysis and applicability of distributed plastic hinge model in inelastic numerical simulation for laterally loaded piles

Chiou, Jiunn-Shyang; Changliang, Lin; Chen, Chia-Han

doi:10.1016/j.compgeo.2013.10.007

Cited by 5 publications

(7 citation statements)

References 14 publications

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“…The improved formulas for the p-y curve of flexible circular drilled shafts in cohesionless soils are shown in Eqs. (10) and (11). These modified equations are recommended to be utilized by designers and field engineers for their corresponding strengths.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Evaluation of lateral capacity for flexible drilled shafts in cohesionless soils

et al. 2022

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This study aimed to evaluate and improve the p– y curve method for use in the lateral analysis of flexible circular drilled shafts in cohesionless soils. Onsite circular drilled shaft lateral load test data from all over the world were collected, and the applicability of O’Neill and Murchison's p– y curve method was evaluated by comparing the measured values with the method's predicted values. Results showed that the current predictions were underestimated after applying the method to a database of flexible circular drilled shafts in cohesionless soils. Then, the difference (Δ Q) between the predicted value ( Qp) and measured value ( Qm) was normalized using the measured value (Δ Q/ Qm) to determine the percent difference, and an average value of − 47% was produced. The difference ratio between the measured and predicted values was proportional to the diameter of the pile. To calibrate the prediction of the current method, this study applied two parameters (α and β) as modifications to reduce Δ Q. The parameters were decided by using the average difference ratio and average absolute difference methods. The reliability and consistency of the prediction of the p– y curve method were enhanced by applying the recommended modifying parameters. Specific design recommendations were also provided based on the proposed modifications on the original p–y curve.

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Evaluation of lateral capacity for flexible drilled shafts in cohesionless soils

et al. 2022

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“…To simulate the nonlinear flexural behavior of the column, the distributed plastic hinge model is applied. The distributed plastic hinge model was originally developed for piles (Chiou et al, 2009; Chiou et al, 2014). Without prescribing the location of the plastic zone beforehand, this model distributes potential plastic hinges along the beam–column elements, automatically detecting the development of the plastic zone upon the loading.…”

Section: Simulationsmentioning

confidence: 99%

Analysis of in situ bridge columns with exposed caisson foundations in a gravel stratum under lateral loading

Chiou

Tsai

2019

Advances in Structural Engineering

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In this study, three in situ laterally loaded tests on bridge columns with caisson foundations in gravels were numerically explored. The three tests differed in the application position of lateral loads and the exposed length of the foundations. The analysis model used beam–column elements with distributed plastic hinges to simulate the column and a six-component Winkler beam model to simulate the foundation. The lateral stiffness of the foundation with combined moment and horizontal loading and a large exposed length was the smallest. Although the foundations were situated in a gravel stratum, the caisson with a large exposed length underwent significant foundation flexibility and nonlinearity; however, with increasing lateral loading, the influences of foundation flexibility and nonlinearity on the lateral displacement of the columns were reduced because column yielding limited the load transfer to the foundation. The horizontal soil reactions in front of the foundation and the side horizontal shear soil reactions along the caisson shaft provided major resistances to lateral loading (horizontal load and overturning moment). With increasing foundation exposure, the contribution of the base soil reactions increased, but the contribution of the side horizontal soil reactions decreased accordingly. The side vertical shear soil reactions and base normal soil reactions contributed moment resistance to reduce the foundation displacement and rotation and thus promoted the overall lateral capacity of the caisson foundations although they did not provide direct counterbalances to horizontal loads.

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“…to determine the ductility of piles in several selected limit states. Chiou et al 21,22 . and Zhang et al 23 .…”

Section: Introductionmentioning

confidence: 98%

“…The SPH model has also been adopted by Song et al 20 to determine the ductility of piles in several selected limit states. Chiou et al 21,22 and Zhang et al 23 extended the SPH to the plastic zone with numerous plastic hinges through the software SAP2000. This model tracks the development of the plastic zone by using numerous plastic hinges within the possible plastic zone of the pile.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to the modeling of the structural inelasticity, the nonlinear pile-soil interaction is commonly considered by the discrete spring elements model. 19,[21][22][23][24][25][26][27][28][29][30][31] The pile-soil system is simplified to the pile being represented by structural beam elements and the soil resistance being represented by nonlinear discrete spring elements. The actual soil resistance distribution along the pile is approximated as a series of equivalent point loads acting on the element nodes via discrete springs.…”

Section: Introductionmentioning

confidence: 99%

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Formulation and numerical applications of efficient pile–soil integrated element considering structural inelasticity

Wan

Bai

2023

Num Anal Meth Geomechanics

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The prediction of pile behavior under extreme loading is an essential consideration in the design. The pile behavior at a large displacement level is governed by the pile–soil interaction and the material inelasticity. The conventional numerical model using a large number of elements is inefficient for modeling the nonlinear pile–soil interaction and structural inelasticity in finite element analysis. To accurately and effectively evaluate the behavior of piles under extreme loading, this paper develops a pile–soil integrated element considering structural inelasticity. The pile–soil interaction force can be efficiently evaluated according to the soil resistance at the Gauss integration points. The different types of p‐y and t‐z curves can be applied in this element to represent soil properties at any soil depth. Zero‐length plastic hinges at the ends and middle of an element are used to capture the inelastic behavior of a pile. The plastic hinges and the soil springs are integrated into the proposed element formulations, and thus one element type is sufficient to conveniently simulate the nonlinear pile–soil interactions. Comparisons between the results of the elastic pile element and the data from published literature and field tests are provided to validate the accuracy and efficiency of the proposed method.

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Exploring influence of sectional flexural yielding on experimental pile response analysis and applicability of distributed plastic hinge model in inelastic numerical simulation for laterally loaded piles

Cited by 5 publications

References 14 publications

Evaluation of lateral capacity for flexible drilled shafts in cohesionless soils

Evaluation of lateral capacity for flexible drilled shafts in cohesionless soils

Analysis of in situ bridge columns with exposed caisson foundations in a gravel stratum under lateral loading

Formulation and numerical applications of efficient pile–soil integrated element considering structural inelasticity

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