Numerical seismic performance evaluation of concrete beam-column joint reinforced with different super elastic shape memory alloy rebars

2019 ◽  
Vol 194 ◽  
pp. 161-172 ◽  
Author(s):  
Mumtasirun Nahar ◽  
A.H.M. Muntasir Billah ◽  
Habibur R. Kamal ◽  
Kamrul Islam
Keyword(s):  
Performance Evaluation ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Seismic Performance ◽  
Concrete Beam ◽  
Seismic Performance Evaluation ◽  
Column Joint

PERFORMANCE ASSESSMENT OF RC BEAM-COLUMN JOINT REINFORCED WITH DIFFERENT SUPER ELASTIC SHAPE MEMORY ALLOY TYPES

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Mumtasirun Nahar ◽  
A.H.M.M. Billah ◽  
Habibur Rahman Kamal ◽  
Kamrul Islam
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Seismic Performance ◽  
Smart Materials ◽  
Plastic Hinge ◽  
Analytical Investigation ◽  
Rc Beam ◽  
Story Drift ◽  
Alloy Effect ◽  
Column Joint

Superelastic Shape Memory Alloys (SE SMAs) are smart materials that have the ability to undergo large inelastic deformation upon stress removal (superelasticity) or heating (shape-memory alloy effect). If such smart materials can be used in the plastic hinge regions of reinforced concrete (RC) beam-column joints as reinforcement, they can undergo large deformations during an earthquake and can return to their undeformed/ original shape after the earthquake. This paper represents the seismic performance of beam-column joint reinforced with three different types of SMA (e.g Ni-Ti, Cu-Al-Mn, Fe based) and compared the result with regular steel-RC beam-column joint. An analytical investigation has been considered to evaluate the seismic performance of smart RC beam-column joint and regular steel-RC joint under reversed cyclic loading. The performance of the beam-column joint is compared in terms of load-story drift ratio and energy dissipation capacity. All SMA-RC beam-column joints show nearly 40-60% higher displacement than steel-RC joint before yielding. Among three types of SMA Ni-Ti dissipate 24% higher energy than any other types of SMA.

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