Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles
Reinforced concrete piles installed by impact hammers have been used as a common solution for deep foundations because they are cost effective and require less time for construction. Driven piles are often used in large volumes for infrastructure and industrial projects in rural areas. Unlike other...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-07-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/14/7112 |
| _version_ | 1797433893257740288 |
|---|---|
| author | Thuyet N. Nguyen Thang Q. Pham Thuy T. Vu Adnan A. Malik Duc N. Dinh |
| author_facet | Thuyet N. Nguyen Thang Q. Pham Thuy T. Vu Adnan A. Malik Duc N. Dinh |
| author_sort | Thuyet N. Nguyen |
| collection | DOAJ |
| description | Reinforced concrete piles installed by impact hammers have been used as a common solution for deep foundations because they are cost effective and require less time for construction. Driven piles are often used in large volumes for infrastructure and industrial projects in rural areas. Unlike other installation methods, installing piles using impact hammers can generate tensile stress during construction, which can result in pile failures. Induced tensile stress occurs when piles are being driven through a hard soil layer to a softer soil layer, and transverse cracks happen when induced tensile stress exceeds the pile tensile strength. This issue is not explicitly stated in most standards; the rare code that mentions this issue is AASHTO 2014. AASHTO 2014 uses correlations between the concrete tensile and compressive strengths to obtain the pile tensile strength. However, data collected from more than 1300 tests on the correlations between the concrete tensile and compressive strengths show that the concrete pile tensile strengths obtained using AASHTO 2014 are significantly conservative. This paper provides an adjustment in the correlation for the tensile strength based on previous data, and it proposes an approach to estimate the tensile strength for concrete-driven piles. A case study of the effects of pile failures on the tensile strength is also presented to verify the approach. The obtained tensile strength from the proposed approach agrees well with the measured field data. For the case study, the pile tensile strength obtained using the proposed approach is 38% and 59% higher than the tensile strength obtained using AASHTO 2014. These quantities are significant but may vary, depending on the compression strength of the concrete used and the pile configurations. The proposed approach better predicts the tensile strength of concrete piles and can lead to cost savings. |
| first_indexed | 2024-03-09T10:23:23Z |
| format | Article |
| id | doaj.art-a28223c84be346f4b0dc59c197fb9cdf |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T10:23:23Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-a28223c84be346f4b0dc59c197fb9cdf2023-12-01T21:51:38ZengMDPI AGApplied Sciences2076-34172022-07-011214711210.3390/app12147112Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven PilesThuyet N. Nguyen0Thang Q. Pham1Thuy T. Vu2Adnan A. Malik3Duc N. Dinh4Institute of Geotechnical Engineering, Vietnam Institute for Building Science and Technology, 81 Tran Cung, Hanoi 100000, VietnamDepartment of Civil Engineering, University of Texas Rio Grande Valley, Edinburg, TX 78539, USADepartment of Civil Engineering, University of Texas Rio Grande Valley, Edinburg, TX 78539, USANewcastle Australia Institute of Higher Education, Singapore 188064, SingaporeDepartment of Civil Environmental Engineering, Saitama University, Sakura-ku, Saitama 338-8570, JapanReinforced concrete piles installed by impact hammers have been used as a common solution for deep foundations because they are cost effective and require less time for construction. Driven piles are often used in large volumes for infrastructure and industrial projects in rural areas. Unlike other installation methods, installing piles using impact hammers can generate tensile stress during construction, which can result in pile failures. Induced tensile stress occurs when piles are being driven through a hard soil layer to a softer soil layer, and transverse cracks happen when induced tensile stress exceeds the pile tensile strength. This issue is not explicitly stated in most standards; the rare code that mentions this issue is AASHTO 2014. AASHTO 2014 uses correlations between the concrete tensile and compressive strengths to obtain the pile tensile strength. However, data collected from more than 1300 tests on the correlations between the concrete tensile and compressive strengths show that the concrete pile tensile strengths obtained using AASHTO 2014 are significantly conservative. This paper provides an adjustment in the correlation for the tensile strength based on previous data, and it proposes an approach to estimate the tensile strength for concrete-driven piles. A case study of the effects of pile failures on the tensile strength is also presented to verify the approach. The obtained tensile strength from the proposed approach agrees well with the measured field data. For the case study, the pile tensile strength obtained using the proposed approach is 38% and 59% higher than the tensile strength obtained using AASHTO 2014. These quantities are significant but may vary, depending on the compression strength of the concrete used and the pile configurations. The proposed approach better predicts the tensile strength of concrete piles and can lead to cost savings.https://www.mdpi.com/2076-3417/12/14/7112pile driving analyzer (PDA)tensile stressconcrete pilesdriven-pile installation |
| spellingShingle | Thuyet N. Nguyen Thang Q. Pham Thuy T. Vu Adnan A. Malik Duc N. Dinh Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles Applied Sciences pile driving analyzer (PDA) tensile stress concrete piles driven-pile installation |
| title | Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles |
| title_full | Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles |
| title_fullStr | Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles |
| title_full_unstemmed | Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles |
| title_short | Predicting Tensile Strength for Prestressed Reinforced Concrete-Driven Piles |
| title_sort | predicting tensile strength for prestressed reinforced concrete driven piles |
| topic | pile driving analyzer (PDA) tensile stress concrete piles driven-pile installation |
| url | https://www.mdpi.com/2076-3417/12/14/7112 |
| work_keys_str_mv | AT thuyetnnguyen predictingtensilestrengthforprestressedreinforcedconcretedrivenpiles AT thangqpham predictingtensilestrengthforprestressedreinforcedconcretedrivenpiles AT thuytvu predictingtensilestrengthforprestressedreinforcedconcretedrivenpiles AT adnanamalik predictingtensilestrengthforprestressedreinforcedconcretedrivenpiles AT ducndinh predictingtensilestrengthforprestressedreinforcedconcretedrivenpiles |