Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Gebran N. Karam"'
Publikováno v:
Journal of Seismology. 25:1209-1226
A three dimensional distinct element model was developed for the multiblock Baalbek columns to investigate the response of the existing columns as well as 0.5m and 1m scaled models used in shaking table experiments. Periodic pulses of varying shapes,
Autor:
Gebran N. Karam, Mazen R. Tabbara
Publikováno v:
Journal of Earthquake Engineering. 26:887-910
Reduced 1/20 and 1/40 models of the Baalbek columns were subjected to harmonic excitations of varying amplitudes and periods to investigate rocking and overturning. 2D UDEC numerical simulations an...
Autor:
Mazen R. Tabbara, Gebran N. Karam
Publikováno v:
ACI Structural Journal. 117
Autor:
Gebran N. Karam, Mazen R. Tabbara
Publikováno v:
Applied Sciences, Vol 10, Iss 5924, p 5924 (2020)
Applied Sciences
Volume 10
Issue 17
Applied Sciences
Volume 10
Issue 17
Following the seminal work of Housner, a novel energy based critical pulse theoretical model is derived to assess the seismic stability of rocking rigid blocks under single pulses from near-fault earthquakes. It is shown that overturning is condition
Autor:
Mazen R. Tabbara, Gebran N. Karam
Publikováno v:
Applied Sciences, Vol 10, Iss 3432, p 3432 (2020)
Applied Sciences
Volume 10
Issue 10
Applied Sciences
Volume 10
Issue 10
In order to improve the efficiency of fiber reinforced plastics (FRP) confinement as a method to repair and strengthen concrete structures, a parametric analysis was carried out to investigate the effects of cylinder slenderness and the stiffness of
Autor:
Gebran N. Karam, Mazen R. Tabbara
Publikováno v:
Journal of Materials in Civil Engineering. 21:110-118
The application of the Hoek – Brown empirical strength criterion to actively confined concrete is investigated. A large database of experimental results on hydraulically and triaxially confined concrete is reviewed and analyzed. The normalized two-
Autor:
Gebran N. Karam, Mazen R. Tabbara
Publikováno v:
Journal of Composites for Construction. 9:388-396
An innovative mechanistic based method for passive confinement efficiency estimation is proposed based on the extension to rectangular sections of the pulley model previously proposed by the writers. A refined finite element model was developed using
Autor:
Gebran N. Karam, Mazen R. Tabbara
Publikováno v:
Magazine of Concrete Research. 56:461-464
An experimental investigation of the corner sharpness effect in square columns with carbon fibre-reinforced polymer (CFRP) wraps is presented using traditional compressive testing of short square columns as well as an innovative set-up that allows te
Publikováno v:
Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences. 450:141-162
Many natural materials have exceptionally high values of the mechanical performance indices described in the previous, companion paper. For beams and plates of a given stiffness or strength, or for a column of a given buckling resistance, woods, palm