Precast prestressed concrete pavement (PPCP): Effect of thermal gradient on curling deflection and stress. (8th March 2021)

• Record Type: Journal Article
• Authors: Kim, Kukjoo; Chun, Sanghyun; Park, Bongsuk; Han, Sangyoung
• Is Part Of: Construction & building materials. Volume 274(2021)
• Publication Date: 2021-03-08
• Subjects: Environmental response characteristics -- Precast prestressed concrete -- Finite element analysis -- Concrete pavement; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2020.121966
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Curling stress in PPCP is significantly influenced by change in prestress force. The maximum curling stress occurs at the edge of slab along transverse centreline. The calculated maximum curling stress increases as the concrete modulus increases. The maximum curling stress decreases as subgrade stiffness increases. The variations of subgrade stiffness have trivial effect on change in curling stress. Abstract: In this study, a three-dimensional (3-D) finite element (FE) model was developed and validated to evaluate the effect of thermal gradient on behavior of Precast Prestressed Concrete Pavement (PPCP) system. The FE model developed was then utilized to perform a numerical analysis for determination of the curling deflections and curling stresses by changing the important pavement parameters (i.e., prestress forces, concrete property, and subgrade stiffness). Results indicated that the 3-D FE model developed for PPCP system was capable of providing reliable predictions in consideration of the effect of thermal gradient on change in curling deflection and stress.