SavedAdd your journal

Journals / Turkish Journal of Civil Engineering / 2023 / Cilt: 34 Sayı: 6

Hazard Curves for Reliability Assessment of Strip Footings on Spatially Varying Cohesive Soils

Ahmet Can MERT
Gökhan YAZICI
Hadi KHAN BABA ZADEH
Pages
1–28
Publication Date
2023-11-01
DOI
—
🏛️Bibliographic metadata and full text access for this article are provided via DergiPark.
DergiPark Record ↗
✨

AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The proposed technique offers a probabilistic evaluation of strip footings with spatial variation of clayey soils and a valid method for the reliability-based design of foundations in the serviceability limit state.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:The present study aimed to create a series of hazard curves against maximum total settlement and angular rotation of strip footings for probabilistic shallow foundation design on clays.
📊
Key Findings & Data:The method proposed has been validated using an independent database of in-situ results, and a worked example was provided to illustrate the implementation of the process.
💡
Conclusion & Impact:The proposed technique offers a probabilistic evaluation of strip footings with spatial variation of clayey soils and a valid method for the reliability-based design of foundations in the serviceability limit state.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Random field finite element method · strip footings · soil-foundation-structure interaction

Abstract

The present study aimed to create a series of hazard curves against maximum total settlement and angular rotation of strip footings for probabilistic shallow foundation design on clays. Random field finite element method (RFEM) was adopted with elasto-plastic clay-like soil behavior, deformation modulus (Ed) and shear strength parameters (c and ) were employed as random field inputs. Parameters were defined and assigned to the analysis models with varying correlation lengths (h, v). Models have been iteratively solved one thousand times, and output distributions of maximum settlement and angular rotations were recorded. Probability density functions (PDF) were fitted to the outputs, and probability of failure (Pf) for footing deformation limits was subsequently estimated. Proposed hazard curves for two anisotropy and three variability categories were developed employing the estimated Pfs. The method proposed has been validated using an independent database of in-situ results, and a worked example was provided to illustrate the implementation of the process. The key contribution of the research is to form hazard curves for shallow foundations considering elasto-plastic soil behavior with the impact of all influencing parameters, respecting the limit values for foundation deformation in the design codes. The proposed technique offers a probabilistic evaluation of strip footings with spatial variation of clayey soils and a valid method for the reliability-based design of foundations in the serviceability limit state.

🔖

Cite This Article

MERT, A. C., YAZICI, G., ZADEH, H. K. B. (2023). Hazard Curves for Reliability Assessment of Strip Footings on Spatially Varying Cohesive Soils. Turkish Journal of Civil Engineering, Cilt: 34 Sayı: 6, 1–28. https://ajindex.com/articles/970618

📄 Full Text PDF Viewer

📄

PDF görüntüleyici hazırlanıyor...

References (14)

  1. EN-1997-1, Eurocode 7: Geotechnical design- Part 1: General Rules, CEN European Committee for Standardization, Brussels, 2004.
  2. K.K. Phoon, F.H. Kulhawy, Characterization of geotechnical variability, Can. Geotech. J. 36 (1999) 612–624. https://doi.org/10.1139/t99-038.
  3. K.K. Phoon, F.H. Kulhawy, Evaluation of geotechnical property variability, Can. Geotech. J. 36 (1999) 625–639. https://doi.org/10.1139/t99-039. EN-1990:2002,
  4. Eurocode. Basis of Structural Design, CEN European Committee for Standardization, Brussels, 2002. ISO-2394:2015, General Principles on Reliability of Structures., International Organization for Standardization, Geneva, 2015.
  5. E.H. Vanmarcke, Probabilistic Modeling of Soil Profiles, ASCE J Geotech Eng Div. 103 (1977) 1227–1246. https://doi.org/10.1016/0148-9062(78)90012-8.
  6. E.H. Vanmarcke, Random Fields: Analysis and Synthesis, World Scientific, London&New Jersey, 2010. https://doi.org/https://doi.org/10.1142/5807.
  7. G.B. Beacher, T.S. Ingra, Stochastic Fem in Settlement Predictions, J. Geotech. Eng. Div. 107 (1981) 449–463. https://doi.org/10.1061/ajgeb6.0001119.
  8. D. V. Griffiths, G.A. Fenton, Probabilistic settlement analysis by stochastic and random finite-element methods, J. Geotech. Geoenvironmental Eng. 135 (2009) 1629–1637. https://doi.org/10.1061/(ASCE)GT.1943-5606.0000126.
  9. A. Ahmed, A.H. Soubra, Probabilistic analysis of strip footings resting on a spatially random soil using subset simulation approach, Georisk. 6 (2012) 188–201. https://doi.org/10.1080/17499518.2012.678775.
  10. G.A. Fenton, D. V. Griffiths, Risk Assessment in Geotechnical Engineering, John Wiley & Sons, Inc., Hoboken, NJ, USA, 2008. https://doi.org/10.1002/9780470284704.
  11. G.M. Paice, D. V. Griffiths, G.A. Fenton, Finite element modeling of settlements on spatially random soil, J. Geotech. Eng. 122 (1996) 777–779. https://doi.org/10.1061/(asce)0733-9410(1996)122:9(777).
  12. A. Ahmed, A.H. Soubra, Probabilistic analysis at the serviceability limit state of two neighboring strip footings resting on a spatially random soil, Struct. Saf. 49 (2014) 2–9. https://doi.org/10.1016/j.strusafe.2013.08.001.
  13. G.A. Fenton, D. V. Griffiths, Three-dimensional probabilistic foundation settlement, J. Geotech. Geoenvironmental Eng. 131 (2005) 232–239. https://doi.org/10.1061/(ASCE)1090-0241(2005)131:2(232).
  14. T. Al-Bittar, A.H. Soubra, Probabilistic analysis of strip footings resting on spatially varying soils and subjected to vertical or inclined loads, J. Geotech. Geoenvironmental Eng. 140 (2014).