3D fracture modelling and limit state analysis of prestressed composite concrete pipes
1. School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China 2. Shanghai SMI Engineering Project Management Co., Ltd., Shanghai 201103, China
In this manuscript, we study fracture of prestressed cylindrical concrete pipes. Such concrete pipes play a major role in tunneling and underground engineering. The structure is modelled fully in 3D using three-dimensional continuum elements for the concrete structure which beam elements are employed to model the reinforcement. This allows the method to capture important phenomena compared to a pure shell model of concrete. A continuous approach to fracture is chosen when concrete is subjected to compressive loading while a combined continuous-discrete fracture method is employed in tension. The model is validated through comparisons with experimental data.
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