seismic performance of a new self centering-repairable RC shear wall

Document Type : Research Article

Authors

Faculty of Civil Engineering, Shahrood University of Technology, Shahrood, Iran

Abstract

Permanent deformation after an earthquake increases the cost of retrofit and even the implementation of the rehabilitation plan.A resisting system to control the lateral forces due to earthquakes is to use shear walls with good energy dissipation capability.Permanent deformation and cracking in the border and critical areas ofthe wall after relatively strong earthquakes leads to a decrease inthe seismic performance of the wall.In this research, the responses and cyclic behavior of concrete shear walls under the cyclic loading protocol are investigated.For this purpose, using OpenSEES finite element software, concrete shear wall modeling based on SFI-ΜVLEM method or wall modeling using multiple vertical elements based on macrofiber method has been studied.The main models analyzed in this study include 2concrete walls with steel rebars and memory alloy (SMA) with different dimensions and arrangement of reinforcements and innovative concrete wall with separate border elements inthe form of concrete columns made of engineered concrete (ECC) and SMA rebars.Validation of the models was based on previous studies.After validation of the initial models, the parametric study ofthe models was performed inorderto investigate the effects of the dimensions of the boundary areas, the type and arrangement of the reinforcements and the amount of gravitational forces on the shear walls in the models.The results obtained from the outputs show that the use of SMA materials in the boundary areas ofthe wall has a significant effect onthe selfcentering behavior of the wall and the energy dissipation ofthe shear wall is reduced by using SMA materials.

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Amirkabir Journal of Civil Engineering
Volume 55, Issue 1
April 2023
Pages 201-224

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