Title: Effective Moment of Inertia of Reinforced Concrete Piles

Author(s): Luisa María Gil-Martín, Manuel Alejandro Fernández-Ruiz, and Enrique Hernández-Montes

Publication: Structural Journal

Volume: 119

Issue: 5

Appears on pages(s): 167-178

Keywords:

DOI: 10.14359/51734798

Date: 9/1/2022

Abstract:
Traditionally, reinforced concrete (RC) piles for earth retaining systems have been designed using symmetrical reinforcement. The non-symmetric or asymmetric RC pile is a recently patented structural element. Savings of up to 50% of longitudinal reinforcing steel can be obtained using non-symmetrically reinforced piles in comparison with traditional symmetrical ones. In this work, the calculation of the short-term deflection of cracked RC piles using the concept of effective moment of inertia is investigated. Five specimens with both symmetric and asymmetric reinforcements were tested in four-point bending tests. In addition, a numerical finite element analysis of symmetric and non-symmetric circular RC members was also carried out to enlarge the available database. The widely used expressions of effective moments of inertia proposed by Branson and Bischoff (originally conceived for rectangula sections) were adapted to fit experimental and numerical results. Both symmetrically and asymmetrically reinforced concrete elements were studied.