Fatigue life prediction of self compacting concrete using S-N-Pf relationship

Authors

  • S. Goel
  • S.P. Singh

Keywords:

Fatigue life; probability of failure; self compacting concrete; stress level; survival probability.

Abstract

The paper presents a study on the development of a relationship for Self Compacting Concrete (SCC) beams in terms of fatigue life (N), stress level (S) and failure probability (Pf) to predict its flexural fatigue life. The fatigue life data of SCC was obtained by carrying of flexural fatigue tests on about 50 specimens of size 100 x 100 x 500 mm under four point loading at different stress levels in the range of 0.85 to 0.65. As the estimation of static flexural strength was a desirable pre-requisite for the selection of the maximum and minimum load limits for the fatigue tests, approximately 40 complimentary static flexural tests were also conducted to facilitate fatigue testing. The flexural fatigue tests and static flexural tests were conducted on a 100 kN closed loop servo-controlled actuator. The results have been used to develop a family of S-N-Pf curves graphically to represent the relationship between stress level S, fatigue life N, and probability of failure Pf, thus incorporating probability of failure into the fatigue life data of SCC. The experimental coefficients of the fatigue equation have also been obtained from the fatigue test data to represent the S-N-Pf curves analytically. The two-million cycles fatigue strength of SCC has been observed to be higher than that of Normally Vibrated Concrete (NVC).

Published

19-11-2024

How to Cite

Goel, S., & Singh, S. (2024). Fatigue life prediction of self compacting concrete using S-N-Pf relationship. Journal of Structural Engineering, 44(6), 613–621. Retrieved from http://14.139.176.44/index.php/JOSE/article/view/798

Issue

Section

Articles