Nonlinear Time History Analysis of Tall Buildings Using Performance-Based Design

Abstract

Performance-based design has been widely accepted as a new alternative design method for the design and rehabilitation of new and existing buildings in the past decades. However, some codes and design guidelines do not allow this method to be implemented. One of the examples is the Egyptian code of practice (ECP). This article implements procedures of performance-based design in the framework of seismic design and performance evaluation with comparison to the ECP. Three case studies are evaluated; two structures of 10 and 20 story reinforced concrete moment frame residential building and one case of 40-story dual system residential building presented to introduce the higher mode effects in tall buildings. All models have been designed according to the ECP provisions. Capacity design approach using the performance-based plastic design by selecting target drift and a predetermined yielding mechanism is employed in the study for the moment frame structures. Nonlinear structural modeling has been adopted to better simulate the structural seismic response and assist to acquire the best performance assessment. All case studies have been evaluated using pushover and nonlinear time history analysis. The study results were evaluated using the ASCE 41 guidelines and presented to demonstrate the capabilities of implementing nonlinear modeling and performance-based design procedures to perform seismic design with better reliability and cost-efficiency compared to the traditional code practice.