Influence of post-cyclic loading on hemic peat
Construction on peat soils has proven to be a challenging task to civil engineers since this soil type has a significant issue that arises from common problems construction of roads, housing and embankment construction with regard to peat are stability, settlements and major problems were encounter...
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| Format: | Thesis |
| Language: | English English English |
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2018
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| Online Access: | http://eprints.uthm.edu.my/186/1/24p%20HABIB%20MUSA%20MOHAMAD.pdf http://eprints.uthm.edu.my/186/2/HABIB%20MUSA%20MOHAMAD%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/186/3/HABIB%20MUSA%20MOHAMAD%20WATERMARK.pdf |
| _version_ | 1825636417636663296 |
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| author | Mohamad, Habib Musa |
| author_facet | Mohamad, Habib Musa |
| author_sort | Mohamad, Habib Musa |
| collection | UTHM |
| description | Construction on peat soils has proven to be a challenging task to civil engineers since this soil type has a significant issue that arises from common problems construction
of roads, housing and embankment construction with regard to peat are stability, settlements and major problems were encountered especially on deep peat. For many years, in road design as an example, static loading method was applied in road
designed by considering soil shear strength through static load and do not take into
account the vehicular dynamic loading and shear strength thereafter. This fact is related to the shear strength of peat soil after dynamically loaded. The aim of this research is to establish the post-cyclic behaviour of peat soil after cyclically loaded and to assess the effect of parameters changes on static and post-cyclic behaviour of peat soil. 200 specimens are tested, and prepared under consolidated undrained
triaxial with effective stresses at 25kPa, 50 kPa, and 100 kPa with different location from Parit Nipah, Johor, Parit Sulong, Batu Pahat, Johor and Beaufort, Sabah. These specimens tested using GDS Enterprise Level Dynamic Triaxial Testing System (ELDYN) apparatus. Whereas, dynamic load tests are carried out in different frequencies to simulate the loading type such as vibration of machineries, wind, traffic load and earthquake in field from 1.0 Hz, 2.0 Hz and 3.0 Hz with 100 numbers of
loading cycles. Post-cyclic monotonic shear strength results and then compared to the static monotonic results. Significantly, showed some vital changes that leads to the changes of stress-strain behaviour. Apparently, the result shows that post-cyclic shear strength decreases with the increase of frequencies. Prior to critical yield strain level, the peat specimen experience a significant deformation. The deformation of peats triggers changes in soil structures that causes reduction in stress-strain behaviour. Thus, it can be concluded that the stress-strain behaviour of peat soil decreased after
100 numbers of cyclic loading in post-cyclic test as compared to the static tests, and it decreased substantially when frequencies were applied. The post-cyclic specimen had
a lower undrained parameters than did the static. Reduction of cohesion value in postcylic
compared to static almost 70% and reduction of friction angle is about 46.34%. |
| first_indexed | 2024-03-05T21:36:35Z |
| format | Thesis |
| id | uthm.eprints-186 |
| institution | Universiti Tun Hussein Onn Malaysia |
| language | English English English |
| last_indexed | 2024-03-05T21:36:35Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | uthm.eprints-1862021-07-06T07:51:34Z http://eprints.uthm.edu.my/186/ Influence of post-cyclic loading on hemic peat Mohamad, Habib Musa TA329-348 Engineering mathematics. Engineering analysis Construction on peat soils has proven to be a challenging task to civil engineers since this soil type has a significant issue that arises from common problems construction of roads, housing and embankment construction with regard to peat are stability, settlements and major problems were encountered especially on deep peat. For many years, in road design as an example, static loading method was applied in road designed by considering soil shear strength through static load and do not take into account the vehicular dynamic loading and shear strength thereafter. This fact is related to the shear strength of peat soil after dynamically loaded. The aim of this research is to establish the post-cyclic behaviour of peat soil after cyclically loaded and to assess the effect of parameters changes on static and post-cyclic behaviour of peat soil. 200 specimens are tested, and prepared under consolidated undrained triaxial with effective stresses at 25kPa, 50 kPa, and 100 kPa with different location from Parit Nipah, Johor, Parit Sulong, Batu Pahat, Johor and Beaufort, Sabah. These specimens tested using GDS Enterprise Level Dynamic Triaxial Testing System (ELDYN) apparatus. Whereas, dynamic load tests are carried out in different frequencies to simulate the loading type such as vibration of machineries, wind, traffic load and earthquake in field from 1.0 Hz, 2.0 Hz and 3.0 Hz with 100 numbers of loading cycles. Post-cyclic monotonic shear strength results and then compared to the static monotonic results. Significantly, showed some vital changes that leads to the changes of stress-strain behaviour. Apparently, the result shows that post-cyclic shear strength decreases with the increase of frequencies. Prior to critical yield strain level, the peat specimen experience a significant deformation. The deformation of peats triggers changes in soil structures that causes reduction in stress-strain behaviour. Thus, it can be concluded that the stress-strain behaviour of peat soil decreased after 100 numbers of cyclic loading in post-cyclic test as compared to the static tests, and it decreased substantially when frequencies were applied. The post-cyclic specimen had a lower undrained parameters than did the static. Reduction of cohesion value in postcylic compared to static almost 70% and reduction of friction angle is about 46.34%. 2018-01 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/186/1/24p%20HABIB%20MUSA%20MOHAMAD.pdf text en http://eprints.uthm.edu.my/186/2/HABIB%20MUSA%20MOHAMAD%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/186/3/HABIB%20MUSA%20MOHAMAD%20WATERMARK.pdf Mohamad, Habib Musa (2018) Influence of post-cyclic loading on hemic peat. Doctoral thesis, Universiti Tun Hussein Onn Malaysia. |
| spellingShingle | TA329-348 Engineering mathematics. Engineering analysis Mohamad, Habib Musa Influence of post-cyclic loading on hemic peat |
| title | Influence of post-cyclic loading on hemic peat |
| title_full | Influence of post-cyclic loading on hemic peat |
| title_fullStr | Influence of post-cyclic loading on hemic peat |
| title_full_unstemmed | Influence of post-cyclic loading on hemic peat |
| title_short | Influence of post-cyclic loading on hemic peat |
| title_sort | influence of post cyclic loading on hemic peat |
| topic | TA329-348 Engineering mathematics. Engineering analysis |
| url | http://eprints.uthm.edu.my/186/1/24p%20HABIB%20MUSA%20MOHAMAD.pdf http://eprints.uthm.edu.my/186/2/HABIB%20MUSA%20MOHAMAD%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/186/3/HABIB%20MUSA%20MOHAMAD%20WATERMARK.pdf |
| work_keys_str_mv | AT mohamadhabibmusa influenceofpostcyclicloadingonhemicpeat |