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Post-cyclic Loading Relationship Effects to the Shear Stress and Cyclic Shear Strain of Peat Soil

Habib Musa Mohamad, Adnan Zainorabidin

Abstract


Peats originate from plants and denote the various stages in the humification process. This condition renders the peat extremely soft and can be considered problematic soil. Thus, this study is conducted to examine and comprehend the particularities of peat engineering behaviour in respect to the relationship effects to the shear stress and cyclic shear strain of peat soil various characteristics to establish suitable correlation. This study carried out by using triaxial testing described by geotechnical test standards BS-1377: Part 8: 1990. Methods of Testing Soils for Civil Engineering Purposes: Shear Strength Tests (Effective Stress) that required for consolidated undrained and consist of five main stages: saturation, consolidation, static, dynamic, and post-cyclic loading using the GDS Enterprise Level Dynamic Triaxial Testing System (ELDYN). The parameters of shear strength were obtained in the peak deviator stress at a maximum of 20% of axial strain by using an undisturbed sample with an effective pressure imposed of 25, 50, and 100 kPa. In this study, all specimens are subjected to cyclic loading up to 100 cycles based on a one-way loading system with strain-controlled conditions. Based on the analysis conveyed, the post-cyclic shear stress decreased compared to its initial value of about 65.56 kPa (PNpt-100 kPa) in static and decreased to 14.9616 kPa in post-cyclic (PNpt-25 kPa-1 Hz). The principal stress ratio (σ'1/σ'3) shows the maximum values of this ratio that are located in the narrow zone of 1.61 to 1.12.

 

Doi: 10.28991/CEJ-2022-08-12-08

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Keywords


Shear Stress; Cyclic Shear Strain; Triaxial; Peat Soil; Dynamic Loading; Post-Cyclic.

References


Kishida, T., Boulanger, R. W., Abrahamson, N. A., Wehling, T. M., & Driller, M. W. (2009). Regression Models for Dynamic Properties of Highly Organic Soils. Journal of Geotechnical and Geoenvironmental Engineering, 135(4), 533–543. doi:10.1061/(asce)1090-0241(2009)135:4(533).

Kramer, S. L. (2000). Dynamic Response of Mercer Slough Peat. Journal of Geotechnical and Geoenvironmental Engineering, 126(6), 504–510. doi:10.1061/(asce)1090-0241(2000)126:6(504).

Boulanger, R. W., Arulnathan, R., Harder, L. F., Torres, R. A., & Driller, M. W. (1998). Dynamic Properties of Sherman Island Peat. Journal of Geotechnical and Geoenvironmental Engineering, 124(1), 12–20. doi:10.1061/(asce)1090-0241(1998)124:1(12).

Seed, H. B., & Chan, C. K. (1966). Clay Strength under Earthquake Loading Conditions. Journal of the Soil Mechanics and Foundations Division, 92(2), 53–78. doi:10.1061/jsfeaq.0000867.

Shafiee, A., Scott, J. B., & Jonathan, P. S. (2013). Laboratory Evaluation of Seismic Failure Mechanisms of Levees on Peat. PhD Thesis, University of California, Los Angeles. United States.

Mohamad, H. M., & Zainorabidin, A. (2021). Young’S Modulus of Peat Soil under Cyclic Loading. International Journal of GEOMATE, 21(84), 177–187. doi:10.21660/2021.84.j2164.

Das, B. M. (2007). Principles of geotechnical engineering. Thomson, Belmont, United States.

Varghese, R., Senthen Amuthan, M., Boominathan, A., & Banerjee, S. (2019). Cyclic and postcyclic behaviour of silts and silty sands from the Indo Gangetic Plain. Soil Dynamics and Earthquake Engineering, 125. doi:10.1016/j.soildyn.2019.105750.

Erken, A., Kaya, Z., & Şener, A. (2008). Post Cyclic Shear Strength of Fine Grained Soils in Adapazari–Turkey during 1999 Kocaeli Earthquake. 14th World Conference on Earthquake Engineering, 12-17 October, 2008, Beijing, China.

Karaca, H., Depci, T., Karta, M., & Coskun, M. A. (2016). Liquefaction Potential of Adiyaman Peat. IOP Conference Series: Earth and Environmental Science, 44, 052050. doi:10.1088/1755-1315/44/5/052050.

Zainorabidin, A., & Mohamad, H. M. (2016). Preliminary peat surveys in ecoregion delineation of North Borneo: Engineering perspective. Electronic Journal of Geotechnical Engineering, 21(12), 4485–4493.

Zainorabidin, A., & Mohamad, H. M. (2016). A geotechnical exploration of Sabah peat soil: Engineering classifications and field surveys. Electronic Journal of Geotechnical Engineering, 21(20), 6671–6687.

Zergoun, M., & Vaid, Y. P. (1994). Effective stress response of clay to undrained cyclic loading. Canadian Geotechnical Journal, 31(5), 714–727. doi:10.1139/t94-083.

Farrell E.R. (2012). Organics/peat soils. ICE Manual of Geotechnical Engineering, ICE Publishing, London, United Kingdom.

Zolkefle, S. N. A., Zainorabidin, A., Harun, S. F., & Mohamad, H. M. (2018). Influence of damping ratio and dynamic shear modulus for different locations of peat. International Journal of Integrated Engineering, 10(9), 147–151. doi:10.30880/ijie.2018.10.09.009.

Soltani-Jigheh, H., & Soroush, A. (2006). Post-cyclic Behavior of Compacted Clay-sand Mixtures. International Journal of Civil Engineerng, 4(3), 226–243.

Zainorabidin, A., & Bakar, I. (2003, July). Engineering properties of in-situ and modified hemic peat soil in Western Johor. Proceedings of 2nd International Conference on Advances in Soft Soil Engineering and Technology, 2-4 July, 2003, Putrajaya, Malaysia.

Zolkefle, S.N.A. (2014). The dynamic characteristic of Southwest Johor peat under different frequencies. Degree of Master in Civil Engineering Thesis, University Tun Hussein Onn Malaysia (UTHM), Johor Bahru, Malaysia.

Das, B. M., & Luo, Z. (2016). Principles of soil dynamics. Cengage Learning, Boston, United States.

Zainorabidin, A., & Mohamad, H. M. (2015). Pre- and post-cyclic behavior on monotonic shear strength of Penor peat. Electronic Journal of Geotechnical Engineering, 20(16), 6927–6935.

Zhu, Z., Zhang, C., Wang, J., Zhang, P., & Zhu, D. (2021). Cyclic Loading Test for the Small-Strain Shear Modulus of Saturated Soft Clay and Its Failure Mechanism. Geofluids, 2021, 13. doi:10.1155/2021/2083682.

Liu, Y., Luo, Q., Yang, X., Yuan, B., Luo, L., & Lai, M. (2019). Experimental study on dynamic deformation properties of muck soil under low frequency cyclic loading. Journal of Vibroengineering, 21(4), 1215–1226. doi:10.21595/jve.2019.20632.

Taukoor, V., Rutherford, C. J., & Olson, S. M. (2019). Cyclic Behavior of a Reconstituted Gulf of Mexico Clay. Civil and Environmental Engineering Geology. Journal Geotechnical Special Publication, March 24–27, 2019, Pennsylvania, United States. 313–321. doi:10.1061/9780784482100.032.

Chen, C., Xu, G., Zhou, Z., Kong, L., Zhang, X., & Yin, S. (2020). Undrained dynamic behaviour of peaty organic soil under long-term cyclic loading, Part II: Constitutive model and simulation. Soil Dynamics and Earthquake Engineering, 129, 279–291. doi:10.1016/j.soildyn.2019.01.039

Wang, S. (2011). Postcyclic behavior of low-plasticity silt. PhD Thesis, Missouri University of Science and Technology, Rolla, United States.

Prendergast, L. J., & Igoe, D. (2022). Examination of the reduction in natural frequency of laterally loaded piles due to strain-dependence of soil shear modulus. Ocean Engineering, 258. doi:10.1016/j.oceaneng.2022.111614.

Sezer, A., Karakan, E., & Tanrinian, N. (2019). Shear modulus and damping ratio of a non-plastic silt at large shear strains. E3S Web of Conferences, 92, 8007. doi:10.1051/e3sconf/20199208007.


Full Text: PDF

DOI: 10.28991/CEJ-2022-08-12-08

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