Seismic response and torsional effects of RC structure with irregular plant and variations in diaphragms, designed with Venezuelan codes

R. I. Herrera, JUAN CARLOS VIELMA PEREZ, R. Ugel, A. Alfaro, A. Barbat, L. Pujades

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

The objective of this study is to determine the seismic response and torsional effects of an existing Reinforced Concrete building with irregular plant and five levels projected according to an older version of Venezuelan seismic design code. Two structures were analysed: the original building and a redesigned version. Nonlinear static analysis and nonlinear 3D dynamic analysis were applied, based on registers of three synthetic accelerograms compatible with the elastic design spectrum for the used code. In 3D analysis, four structures were simulated, with and without rigid diaphragms so as to compare the seismic behaviour of the buildings. Through this nonlinear analysis parameters were determined that define the behaviour of the structure, torsional moments and rotations in columns reached for simulated buildings. Also, to obtain damage fragility curves for five states damage were generated. Results show that the original structure has an inadequate resistant behaviour and a high probability of exceeding the moderate damage state, while the redesigned structure presents good performance under seismic events according to the existing code. It was also observed that maximum torsional effects occur in the entrant corners of the irregular plant, which are reduced in mid-rise buildings by using a rigid diaphragm.

Original languageEnglish
Title of host publicationEarthquake Resistant Engineering Structures IX
Pages85-96
Number of pages12
DOIs
StatePublished - 22 Nov 2013
Event9th World Conference on Earthquake Resistant Engineering Structures, ERES 2013 - A Coruna, Spain
Duration: 8 Jul 201310 Jul 2013

Publication series

NameWIT Transactions on the Built Environment
Volume132
ISSN (Print)1743-3509

Conference

Conference9th World Conference on Earthquake Resistant Engineering Structures, ERES 2013
CountrySpain
CityA Coruna
Period8/07/1310/07/13

Keywords

  • Nonlinear analysis
  • RC structure
  • Rigid diaphragm
  • Torsional effects

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