The efficiency of reduced beam section connections for reducing residual drifts in moment resisting frames

Kamyar Kildashti, Rasoul Mirghaderi, Iradje Mahmoudzadeh Kani

Research output: Contribution to journalArticlepeer-review

Abstract

In most framed structures anticipated deformations in accordance with current codes fall into acceptable limit states, whereas they go through substantial residual deformations in the aftermath of severe ground motions. These structures seem unsafe to occupants since static imminent instability in the immediate post-earthquake may be occurred. Moreover, rehabilitation costs of extensive residual deformations are not usually reasonable. Apparently, there is a lack of detailed knowledge related to reducing residual drift techniques when code-based seismic design is considered. In this paper, reduced beam section connections as a positive approach are taken action to mitigate the huge amount of residual drifts which are greatly amplified by P-Δ effects. To demonstrate the efficacy of RBS, a sixteen-story moment resisting frame is analyzed based on a suite of 8 single-component near field records which have been scaled according to the code provisions. The results are then processed to assess the effects of RBS detailing on drift profile, maximum drift, and residual drift. Besides, a special emphasis is given to estimate overall trend towards drift accumulation in each story in the presence of RBS assembly. A main conclusion is that using this connection predominantly alleviates the adverse effects of P-Δ on amplifying residual drifts.
Original languageEnglish
Article number19989
Pages (from-to)68-76
Number of pages9
JournalOpen Journal of Civil Engineering
Volume2
Issue number2
DOIs
Publication statusPublished - 2012

Open Access - Access Right Statement

©2012 SciRes. Creative Commons Attribution (CC BY) licence.

Keywords

  • building laws
  • deformations (mechanics)
  • earthquake engineering
  • framing (building)
  • structural failures

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