Cohesive cracked-hinge model for simulation of fracture in one-way slabs on grade

Abstract

Numerical analysis of slab on grade structures subjected to mechanical loads is a complex matter often requiring computationally expensive models. In order to develop a simplified and general concept for non-linear analysis of slab on grade structures, this paper presents a cohesive cracked-hinge model aimed at the analysis of the bending fracture of the cemented material. The model is based on the fracture mechanics concepts of the fictitious crack model with a linear stress–crack opening relationship. Moreover, the paper presents a two-parameter spring foundation model applied to realistically capture the continuity in the supporting medium. The functionality of the proposed model is compared to numerical analysis with application of the more conventional cohesive zone model. The results obtained show that the methodology is a attractive and powerful one well-suited for practical use and further development.

Keywords:

• Cohesive crack
• non-linear FEM
• slab on grade
• cemented materials
• pavement analysis
• two-parameter foundation model

Notes

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by COWIfonden [grant number C-123.03] and Innovation Fund Denmark [grant number 1355-00060]