Performance Evaluation of RC Shear Walls Designed by Direct Displacement Based Design

مهندسی عمران فردوسی

Article 4, Volume 37, Issue 4 - Serial Number 48, December 2024, Pages 49-68   

Document Type: Original Article

DOI: 10.22067/jfcei.2024.77873.1172

Authors

Saeid Abdi¹; Horr Khosravi^{* 2}; Amir Hossein Jafarieh³

¹Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran

²Department of civil engineering, Babol Noshirvani University of Technology, Babol, Iran

³Assistant Professor / Department of civil Engineering, Faculty of engineering and technology, University of Mazandaran, Babolsar, Iran

Abstract

In recent years, performance-based design has developed significantly. Meanwhile, the direct displacement-based design (DDBD) determines the performance criteria on the basis of the maximum displacement of structure. For this purpose, for a predetermined performance level, the level of damage in structural and non-structural elements is defined based on tensile and compressive strain values and inter-story drift ratio, respectively. Then, the displacement corresponding to this level of damage is calculated and is considered as a target displacement. Using design displacement spectrum, the stiffness and strength of structure is adjusted to achieve the target displacement. Therefore, it is expected that the structures designed based on DDBD approach, reach the predetermined target displacement, strain values and inter-story drifts. In this research, in order to investigate the fulfillment of the design goals, first 12 buildings with shear wall systems were designed. They include 5-, 10- and 20-story buildings designed for two levels of earthquake hazard levels and two site classes. The designed buildings were subjected to 45 artificial and 10 natural earthquake records and the displacement, curvature, and inter-story drift ratio were determined. The nonlinear dynamic analysis results show that the average value of story displacements, inter-story drifts and curvatures are almost equal to the design goals and somewhat less. Therefore, the DDBD method meets the performance objectives well.

Keywords

DDBD; Performance objective assessment; RC Shear wall; Nonlinear dynamic analysis

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