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Recent advances in modeling soil-structure interaction problems using OpenSees
- 1. RECENT ADVANCES IN MODELING SOIL-STRUCTURE INTERACTION USING OPENSEES Pedro Arduino Kathryn Petek, Chris McGann University of Washington First European Conference on OpenSees Porto, Portugal June 19-20 2017
- 2. Background: Interface Behavior Soil-structure interaction: stick, slip, debonding, and rebonding behavior (Desai et al., 1988) First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 3. Background: Interface Behavior Soil-structure interaction: stick, slip, debonding, and rebonding behavior Finite Element approaches: Zero-length elements Joint and thin-layer elements Gap elements Body A Body B (Taciroglu et al., 2003)(Desai et al., 1984) First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 4. Contact Element Formulation Using the method of Lagrange Multipliers, the element utilizes the Hertz-Signori-Moreau conditions for contact: tn g 0g 0nt 0 gtn Contact element applies a geometric constraint to the system that relates a slave node to a master contact line segment or surface. First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 5. Contact Material Formulation The geometric constraints are related with an interface constitutive law: Mohr-Coulomb Friction Law Can also use non-linear and history dependent material models, including specific models for concrete structures on soil 0 cttf ns tn ts c First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 6. Contact Material Formulation 0 cttf ns s ts G tn f = 0 sticking sliding f < 0 Elastic slip Plastic slip s ts tn First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 7. Contact Element Formulation s ts tn g1 g2 s ts tn n xx_n xx_n+1 2D Node-to-Line Element 3D Node-to-Surface Element First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 8. OpenSees Contact Element First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 9. Example 1: Friction Pile First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 10. Example 2: Pushover Analysis with Plastic Soil First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 11. Beam-Solid Contact Element Soil: solid elements Pile: beam elements Pile-Soil Interface: ? Beam-Solid Contact Element First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 12. r Surface, G Beam-Solid Contact Element rg cs )( xxn xa xb xs Contact Constraint: xc n First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal g >0
- 13. r Surface, G Beam-Solid Contact Element rg cs )( xxn 0 G g cs xx G cx xa xb xs Contact Constraint: If in contact: xc n First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 14. Beam-Solid Contact Element G cx xa xb jc (x, a1, b1) a1 b1 xc x xc = jc (xc) c1 = jc, x (xc) c1 n xc First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 15. OpenSees - Contact Elements 3D Node-to-Surface Element 2D Node-to-Line Element 3D Beam-to-Solid Element 3D End-Beam-to- Solid Element Master node Slave node tn g First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 16. Beam-Solid ModelSolid-Solid Model Fiber element 3D Pile Analysis solid-solid vs beam-solid contact Moment curvature response for single shaft
- 17. Pile Validation: Laterally Loaded Piles Perform numerical load test Compare results 3x Magnification First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 18. Pile Validation: Laterally Loaded Piles Evaluation of beam response Numerical p-y curves First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 19. Application Problem: Lateral Spreading Pile Pinning Liquefiable Soil Embankment / General slope First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 20. Application Problem: Lateral Spreading Pile Pinning Liquefied Soil Embankment / General slope First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 21. First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Application Problem: Lateral Spreading Pile Pinning
- 22. Case study: Mataquito Bridge First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 23. Case Study: Mataquito Bridge First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Source: FHWA-HRT-11-030
- 24. Case Study: Mataquito Bridge First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Source: FHWA-HRT-11-030
- 25. Mataquito Bridge: Idealized Soil Profile First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 26. Mataquito Bridge: Idealized Soil Profile First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 27. Mataquito Bridge: Foundations First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Abutment with 4x2 drilled shaft group
- 28. Mataquito Bridge: Shaft Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Typical drilled shaft cross-section Fiber discretization for section Uniaxial constitutive models for concrete and steel fibers
- 29. 3D Finite Element Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Full site domainModel domain
- 30. 3D Finite Element Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Modeling the abutment and grouped shaft foundation Bridge deck spring
- 31. 3D Finite Element Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Applied kinematic approach Two approaches are used to simulate the kinematic demands of lateral spreading
- 32. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal existing 3D embankment geometry wide embankment geometry
- 33. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal existing 3D embankment geometry wide embankment geometry
- 34. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal existing 3D embankment geometry wide embankment geometry Displacement fields in direction of loading 100 cm 0 50 cm 75 cm 25 cm
- 35. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Abutment displacement with increasing free-field soil displacement
- 36. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Deformation of shafts with contact forces acting on their surfaces
- 37. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Foundation displacement comparison for 5 cm gap
- 38. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Foundation bending demands at closure of 5 cm gap
- 39. 3D Applied Kinematic Model First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Foundation bending demands at analysis end for 5 cm gap
- 40. Pile Pinning Analysis – Procedure First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Pushover Analysis with Beam on Nonlinear Winkler Foundation Model
- 41. Pile Pinning Analysis – Procedure First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Slope Stability Analysis of Approach Embankment Newmark rigid sliding block analysis – Bray and Travasarou (2007)
- 42. Pile Pinning Analysis – Procedure First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Determination of Compatible Force-Displacement State
- 43. Pile Pinning Analysis – Mataquito First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal Compatible states for slope stability analysis with simplified Janbu method
- 44. Pile Pinning Analysis – Mataquito First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal All considered cases in pile pinning analysis – 5 cm analysis end in 3D Bending demand comparison for pile pinning and 3D applied kinematic model
- 45. Concluding Remarks First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal ► Constraint based contact interface elements capture well pile-soil interface behavior ►Validation simulations & practical application studies demonstrate value and usability of beam-solid contact elements ►The effects of three-dimensional soil deformation on the structural demands developed in bridge foundations during lateral spreading have been demonstrated ►The OpenSees models captured the fundamental responses observed at the Mataquito bridge and identified important deformation mechanisms ►The existing pile pinning analysis procedure was shown to estimate foundation bending demands that were consistent with results obtained from 3D FEA and an approach to dealing with the variability of the method was proposed and demonstrated
- 46. Thanks! This work is funded by the Washington State Department of Transportation (WSDOT) and the Pacific Earthquake Engineering Research Center (PEER) First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal
- 47. Thanks! This work is funded by the Washington State Department of Transportation (WSDOT) and the Pacific Earthquake Engineering Research Center (PEER) First European Conference on OpenSees, June 19-20, 2017, Porto, Portugal