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Título del libro: 9th Us National And 10th Canadian Conference On Earthquake Engineering 2010, Including Papers From The 4th International Tsunami Symposium
Título del capítulo: Shaking table tests of RC shear walls with openings

Autores UNAM:
SERGIO MANUEL ALCOCER MARTINEZ DE CASTRO;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Palabras clave:

Cumulative parameters; Deformed bar; Ductility demands; Dynamic effects; Earthquake load; Loading history; Loading rate; Lower bounds; Number of cycles; Plastic yielding; Quasi-static; Scaled models; Shaking table tests; Shaking tables; Steel ratio; Strength degradation; Testing method; Web reinforcement; Welded-wire mesh; Civil engineering; Earthquakes; Engineering geology; Reinforced concrete; Reinforcement; Steel testing; Tsunamis; Loading


Resumen:

This paper compares the performance of four isolated reinforced concrete (RC) shear walls with two openings: two full-scale prototype walls tested under quasistatic cyclic (QSC) loading and two lightly scaled models tested under shaking table excitation. Variables studied were the web steel ratio (0.125% and 0.25%), the type of web reinforcement (deformed bars and welded wire meshes) and the testing method. It was verified that loading history of the QSC testing ignores the foremost dynamic effects observed in structures subjected to earthquake loads. When dynamic and QSC responses were compared, it was apparent that stiffness and strength degradation properties depend on the loading rate, the strength mechanisms associated to the failure modes (crushing of concrete or plastic yielding of reinforcement), number of cycles, and cumulative parameters such as ductility demand and energy dissipated. Then, data obtained from QSC tests can not always be safely assumed as a lower bound of the performance capacity of RC shear walls with openings subjected to earthquake-type loading.


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