TY  - JOUR
AU  - Santrac, Petar
AU  - Šušić, Nenad
AU  - Bajić, Zeljko
PY  - 2020
UR  - http://rims.institutims.rs/handle/123456789/384
AB  - The paper presents the determination of the elements of the pile stiffness matrix based on pile load test results, made for the needs of modernization of oil refinery for NIS in Pancevo. The tests were carried out on CFA and Franki piles system. However, only the results for CFA piles are shown in this paper. Load tests included axial, tension and horizontal loading. Bearing in mind the geomechanical composition of the terrain and the results of penetration testing (CPT), it has been concluded that the soil resistance can be approximated as a linear function by depth. By approximating the soil by the Winkler model and using the results of the horizontal pile load test, the equivalent gradient of the modulus of soil reaction for the work load level is determined analytically, and then, the pile flexibility coefficients for horizontal load. For vertical load, the coefficient of flexibility is determined directly on the basis of the load-settlement curve. Based on the flexibility coefficient, a matrix of flexibility and a stiffness matrix are determined. The effect of the pile interaction for horizontal and vertical loads was introduced in an approximate way, through the reduction of coefficients of the stiffness matrix. The entire process of determining the stiffness matrix of the pile is illustrated by practical example of a pile group connected by an ideal rigid cap.
PB  - Univ Osijek, Tech Fac, Slavonski Brod
T2  - Tehnicki Vjesnik-Technical Gazette
T1  - Determination of the Pile Stiffness Matrix Based on the Pile Load Test Results and the Effect of Pile Interaction
EP  - 2023
IS  - 6
SP  - 2016
VL  - 27
DO  - 10.17559/TV-20190722102256
ER  - 

@article{
author = "Santrac, Petar and Šušić, Nenad and Bajić, Zeljko",
year = "2020",
abstract = "The paper presents the determination of the elements of the pile stiffness matrix based on pile load test results, made for the needs of modernization of oil refinery for NIS in Pancevo. The tests were carried out on CFA and Franki piles system. However, only the results for CFA piles are shown in this paper. Load tests included axial, tension and horizontal loading. Bearing in mind the geomechanical composition of the terrain and the results of penetration testing (CPT), it has been concluded that the soil resistance can be approximated as a linear function by depth. By approximating the soil by the Winkler model and using the results of the horizontal pile load test, the equivalent gradient of the modulus of soil reaction for the work load level is determined analytically, and then, the pile flexibility coefficients for horizontal load. For vertical load, the coefficient of flexibility is determined directly on the basis of the load-settlement curve. Based on the flexibility coefficient, a matrix of flexibility and a stiffness matrix are determined. The effect of the pile interaction for horizontal and vertical loads was introduced in an approximate way, through the reduction of coefficients of the stiffness matrix. The entire process of determining the stiffness matrix of the pile is illustrated by practical example of a pile group connected by an ideal rigid cap.",
publisher = "Univ Osijek, Tech Fac, Slavonski Brod",
journal = "Tehnicki Vjesnik-Technical Gazette",
title = "Determination of the Pile Stiffness Matrix Based on the Pile Load Test Results and the Effect of Pile Interaction",
pages = "2023-2016",
number = "6",
volume = "27",
doi = "10.17559/TV-20190722102256"
}

Santrac, P., Šušić, N.,& Bajić, Z.. (2020). Determination of the Pile Stiffness Matrix Based on the Pile Load Test Results and the Effect of Pile Interaction. in Tehnicki Vjesnik-Technical Gazette
Univ Osijek, Tech Fac, Slavonski Brod., 27(6), 2016-2023.
https://doi.org/10.17559/TV-20190722102256

Santrac P, Šušić N, Bajić Z. Determination of the Pile Stiffness Matrix Based on the Pile Load Test Results and the Effect of Pile Interaction. in Tehnicki Vjesnik-Technical Gazette. 2020;27(6):2016-2023.
doi:10.17559/TV-20190722102256 .

Santrac, Petar, Šušić, Nenad, Bajić, Zeljko, "Determination of the Pile Stiffness Matrix Based on the Pile Load Test Results and the Effect of Pile Interaction" in Tehnicki Vjesnik-Technical Gazette, 27, no. 6 (2020):2016-2023,
https://doi.org/10.17559/TV-20190722102256 . .