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Título del libro: Icf 2017 - 14th International Conference On Fracture
Título del capítulo: A theoretical approach to the damage propagation and failure of large-diameter pre-stressed concrete cylinder pipelines.

Autores UNAM:
ARMANDO ORTIZ PRADO; VICTOR HUGO JACOBO ARMENDARIZ; IGNACIO CUEVA GUITRON; EFRAIN RAMOS TREJO; RAFAEL SCHOUWENAARS;
Autores externos:

Idioma:
Inglés
Año de publicación:
2017
Palabras clave:

Concrete pipe; Crack propagation; Cylinders (shapes); Failure (mechanical); Prestressed concrete; Shear stress; Wire; Damage propagation; Damage-tolerant design; Mechanical analysis; Prestressed concrete cylinder pipes; Stress redistribution; Stress transmission; Theoretical approach; Water transportation; Damage tolerance


Resumen:

An analytical model is developed which predicts the stress redistribution in prestressed concrete cylinder pipes (PCCP) used in large-scale water transportation systems. The mechanical analysis considers the internal stresses in the prestressed reinforcing wires, the friction with the underlying concrete and shear stress transmission through the mortar which forms the outer layer of the system. The rigidity of the latter is the determining factor in terms of the stress concentrations generated by a given number of consecutively broken wires and determines the damage tolerance of the PCCP. As the solution is obtained in closed form, direct conclusions for damage-tolerant design are easily obtained and models for crack propagation in individual wires can be implemented. © 2017 Chinese Society of Theoretical and Applied Mechanics. All Rights Reserved.


Entidades citadas de la UNAM: