Seismic performance of the typical RC beam–column joint subjected to repeated earthquakes

It is common that a building experience repeated earthquakes throughout its lifetime. Such earthquake is capable of creating severe damage in primary elements of the building due to accumulation of inelastic displacement from repetition. The present study focuses on the influence of repeated earthqu...

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Bibliographic Details
Main Authors: Hassanshahi, Omid, Majid, Taksiah A., Lau, Tze Liang, Yousefi, Ali, Tahara, R. M. K.
Format: Conference Proceeding
Language:English
Subjects:
Beam-columns
Bearing capacity
Catastrophic collapse
Computer simulation
Damage accumulation
Demand
Displacement
Earthquake damage
Earthquakes
Nonlinear analysis
Reinforced concrete
Seismic engineering
Seismic response
Ultimate loads
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Summary:It is common that a building experience repeated earthquakes throughout its lifetime. Such earthquake is capable of creating severe damage in primary elements of the building due to accumulation of inelastic displacement from repetition. The present study focuses on the influence of repeated earthquakes on a typical Reinforced Concrete (RC) beam-column joint, especially on the maximum inelastic displacement demand and maximum residual displacement. For this purpose, the capability of nonlinear modelling in simulating the hysteretic behaviour of the prototype experimental specimen is first determined using RUAUMOKO. A nonlinear Incremental Dynamic Analysis (IDA) on the verified model is then carried out in order to estimate with maximum accuracy the ultimate load bearing capacity to progressive collapse of the RC joint under investigation. Twenty ground motions are selected, and single (C1), double (C2), and triple (C3) event of synthetic repeated earthquakes are then considered. The results show that the repeated earthquakes significantly increase the inelastic demand of the RC joint. On average, relative increment of maximum inelastic displacement demand is experienced about 28.9% and 39.4% when C2 and C3 events of repeated earthquakes are induced, respectively. Residual displacements for repeated earthquakes are also significantly higher than that for single earthquakes.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.5005755