Investigation of Hysteretic Energy, Drift and Damage Index Distribution in Reinforced Concrete Frames with Shear Wall Subjected to Strong Ground Motions

Abstract eng:
In conventional earthquake-resistant design, the loading effect of the earthquake is represented by static equivalent forces, which are calculated from elastic response spectra and are related to the peak ground acceleration (PGA) with the pseudo-acceleration. This approach, however, presents several shortcomings when the inelastic response is of concern. Current provisions for seismic design are based on peak demands without explicit consideration of cumulative damage effects and energy-dissipation capacity resulting from inelastic cyclic response. Studies have shown that most structures subjected to strong ground motions fall into an inelastic state. Thus it is necessary to study the inelastic behavior of structures undergoing such earthquakes. In this study, some reinforced concrete frames with shear wall are considered. The preliminary designs of these frames are based on equivalent static forces accordance to 6 patterns of loadings distribution (UBC; NEHRP; Iranian Seismic Code, Modified Rectangular; First Mode and Three First Modes).The aim of this study is to investigate the distributions of damage in accordance with 6 these patterns. IDARC 2D software has been used to calculate maximum drift, hysteretic energy and structural damage index subjected to severe earthquakes. The results show that the current seismic design based on strength principles, even considering uniform strength distribution, does not lead to a uniform distribution of hysteretic energy, drift and damage index in stories height. However, modified rectangular and three first Modes’ patterns show more uniform distribution of damage rather than others.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket