scholarly journals Forward directivity near-fault and far-fault ground motion effects on the responses of tall reinforced concrete walls with buckling-restrained brace outriggers

2017 ◽  
Vol 0 (0) ◽  
pp. 0-0 ◽  
Author(s):  
Hamid Beiraghi
Keyword(s):  
Reinforced Concrete ◽  
Ground Motion ◽  
Concrete Walls ◽  
Near Fault ◽  
Buckling Restrained Brace ◽  
Reinforced Concrete Walls ◽  
Forward Directivity ◽  
Far Fault

Effects of Fling Step and Forward Directivity on Seismic Response of Buildings

2006 ◽  
Vol 22 (2) ◽  
pp. 367-390 ◽  
Author(s):  
Erol Kalkan ◽  
Sashi K. Kunnath
Keyword(s):  
Seismic Response ◽  
Ground Motions ◽  
High Amplitude ◽  
Moment Frames ◽  
Steel Moment Frames ◽  
Damage Potential ◽  
Near Fault ◽  
Forward Directivity ◽  
Fling Step ◽  
Far Fault

This paper investigates the consequences of well-known characteristics of near-fault ground motions on the seismic response of steel moment frames. Additionally, idealized pulses are utilized in a separate study to gain further insight into the effects of high-amplitude pulses on structural demands. Simple input pulses were also synthesized to simulate artificial fling-step effects in ground motions originally having forward directivity. Findings from the study reveal that median maximum demands and the dispersion in the peak values were higher for near-fault records than far-fault motions. The arrival of the velocity pulse in a near-fault record causes the structure to dissipate considerable input energy in relatively few plastic cycles, whereas cumulative effects from increased cyclic demands are more pronounced in far-fault records. For pulse-type input, the maximum demand is a function of the ratio of the pulse period to the fundamental period of the structure. Records with fling effects were found to excite systems primarily in their fundamental mode while waveforms with forward directivity in the absence of fling caused higher modes to be activated. It is concluded that the acceleration and velocity spectra, when examined collectively, can be utilized to reasonably assess the damage potential of near-fault records.

Damage assessment of squat, thin and lightly-reinforced concrete walls by the Park & Ang damage index

2019 ◽  
Vol 26 ◽  
pp. 100921 ◽  
Author(s):  
Julian Carrillo ◽  
Claudio Oyarzo-Vera ◽  
Carlos Blandón
Keyword(s):  
Reinforced Concrete ◽  
Damage Assessment ◽  
Damage Index ◽  
Concrete Walls ◽  
Reinforced Concrete Walls ◽  
Lightly Reinforced Concrete

Effectiveness of repairing old reinforced-concrete walls of the No. 8 lock of the Moscow Canal by prestressed anchors

1996 ◽  
Vol 30 (11) ◽  
pp. 654-663 ◽  
Author(s):  
V. N. Zhukov ◽  
S. V. Ternavskii ◽  
Yu. O. Zal'tsman ◽  
A. A. Lyubomirov
Keyword(s):  
Reinforced Concrete ◽  
Concrete Walls ◽  
Reinforced Concrete Walls

Shear strength of squat reinforced concrete walls subjected to earthquake loading — trends and models

2010 ◽  
Vol 32 (8) ◽  
pp. 2466-2476 ◽  
Author(s):  
Alfredo Sánchez-Alejandre ◽  
Sergio M. Alcocer
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Earthquake Loading ◽  
Concrete Walls ◽  
Reinforced Concrete Walls

Failure Mechanism of Reinforced Concrete Rib Arch Bridge under Near-Fault Earthquakes

2011 ◽  
Vol 90-93 ◽  
pp. 940-945
Author(s):  
Wen Jun Gao ◽  
Guang Wu Tang ◽  
Yi Da Kong
Keyword(s):  
Reinforced Concrete ◽  
Nonlinear Response ◽  
Plastic Hinge ◽  
Seismic Damage ◽  
Arch Bridge ◽  
2008 Wenchuan Earthquake ◽  
Near Fault ◽  
Pulse Type ◽  
Near Fault Earthquakes ◽  
Far Fault

A typical reinforced concrete rib arch bridge was chosen to investigate its nonlinear response to near-fault ground motions recorded in 2008 Wenchuan earthquake. Results showed that significant seismic damage may occur, maximum demands were higher for near-fault records having forward directive than far-fault motions, and the rotational capacity of rib plastic hinge is not enough for the large compression force of arch rib. While backward-directivity motions, typically do not exhibit pulse-type motions, only have medium seismic damage to the arch bridge.

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