Gettu, Ravindra

Technology transfer of the new trends in concrete : report on the International RILEM Workshop = Transferencia de nuevas tendencias en la tecnología del hormigón : informe del Simposio Internacional RILEM : Barcelona, 7-9 November, 1994 by Simposio Internacional RILEM sobre la Transferencia de Nuevas Tendencias en la Tecnología del Hormigón( Book )

2 editions published in 1995 in Spanish and English and held by 2 WorldCat member libraries worldwide

Concrete and rock fracture and the influence of loading rate by Ravindra Gettu( )

2 editions published in 1992 in English and held by 2 WorldCat member libraries worldwide

Structures of quasi-brittle materials, such as concrete and rock, exhibit a pronounced size effect on the failure stress. A model based on this phenomenon, and its implications are reviewed. The R-curve for the fracture resistance, which has been derived from the size effect law, is modified to have size-dependent plateaus in the post-peak stage. This yields satisfactory predictions of the structural response for high strength concrete and limestone. The fracture parameters obtained from the size effect method are used to show that when the "strength" of concrete is increased, the fracture resistance increases by much less and, importantly, the brittleness increases significantly. Brittleness is related here to the size of the fracture process zone. The size effect method is applied to tests of concrete and limestone at various loading rates. The failure time for the concrete tests ranges over 4 decades of time, from 1 second to 3 days, and the range of the rock tests is 3 decades. An important trend is the increase in the brittleness of concrete with decrease in loading rate, possibly due to creep mechanisms. This effect is not seen in short-term tests of rock. It is also confirmed that fracture toughness decreases with increase in failure time. To further study the coupling of creep and fracture, relaxation tests of notched concrete beams were conducted. It is concluded that the relaxation is higher than linear behavior (of unnotched beams at low loads), and increases with load in the pre-peak stage. In the post-peak regime, the relaxation seems to be unaffected by the load. Also, creep/relaxation is accelerated by increase in the loading rate prior to initiation of creep/relaxation

Correction to: Sustainability-based decision support framework for choosing concrete mixture proportions by Ravindra Gettu( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Desarrollo sostenible del cemento y del hormigón( Book )

2 editions published in 2002 in Spanish and held by 2 WorldCat member libraries worldwide

Caracterización y utilización del hormigón autocompactable by Marina Bravo Sobrino( Book )

2 editions published in 2004 in Spanish and held by 2 WorldCat member libraries worldwide

Mechanistic-empirical design of fibre reinforced concrete (FRC) pavements using inelastic analysis by S. K Nayar( )

1 edition published in 2020 in English and held by 2 WorldCat member libraries worldwide

Behavior of concrete with very high fiber content( )

1 edition published in 2008 in English and held by 2 WorldCat member libraries worldwide

Estudio experimental del comportamiento del hormigón confinado sometido a compresión by Carlos Máximo Aire Untiveros( Book )

2 editions published in 2002 in Spanish and held by 2 WorldCat member libraries worldwide

Experimental and numerical analysis of the shear failure in steel fibre reinforced concrete by Carles Ferrer i Boix( )

2 editions published in 2003 in English and held by 2 WorldCat member libraries worldwide

El principal objectiu d'aquesta tesina ha estat el d'analitzar els efectes de les fissures i la seva propagació en el comportament mecànic d'un material quasi-fràgil com el formigó. Concretament tracta de la ruptura per tallant a Formigons Reforcats amb Fibres (FRF) en assajos de tipus "push-off" en probetes prismàtiques. L'anàlisi consta d'un estudi experimental mitjançant el qual s'ha estudiat el comportament en mode mixte de la ruptura així com d'una anàlisi numèrica per a determinar els paràmetres que controlen en el mode I de fractura a partir dels quals s'ha realitzat la modelització per elements finits dels assajos a tallant

La tenacidad de hormigones reforzados con fibras de acero( Book )

1 edition published in 2000 in Spanish and held by 2 WorldCat member libraries worldwide