Evaluation of Different Approaches to Estimate Seismic Input Energy and Top Displacement Demand of Moment Resisting Frames

Furkan Çalım, Ahmet Güllü*, Ercan Yüksel

*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

Energy-based seismic design (EBSD) has many advantages over the conventional design approaches (force- and displacement-based) provided by the current seismic design codes since it accounts for duration, frequency content and pulse-type of the ground motion. Cumulative damage potential of the earthquake excitation is also taken into consideration by this approach. In order to obtain a satisfactory design, energy capacity of a structure should exceed the energy demand from an earthquake in EBSD. The structural damage indicators like inelastic top displacement demand (δtop) of MDOF system, which can be used as a crucial input data for general nonlinear static analysis procedures, are claimed to be accurately predicted using the input energy. Primarily, seismic input energy per unit mass (EI/m) imparted into a MDOF frame system during an earthquake is determined by only using modal properties of the system and input energy time series of earthquake ground motion on its equivalent SDOF systems. Using the determined seismic input energy per unit mass, δtop is predicted by literature equations. Effects of spectral matching on the success of seismic input energy and inelastic displacement demand estimations were also investigated. Evaluation of the predictions of δtop was achieved by comparing with the results of nonlinear time history analyses (NLTHA) on two distinct three-story moment resisting frames. It was observed that the relative differences between analyses results and the predicted values were calculated as 18% (input energy prediction) and 30% (top displacement prediction) for the original records whereas they were 12 and 20% for the spectrally matched ground motions.

Original languageEnglish
Title of host publicationEnergy-Based Seismic Engineering - Proceedings of IWEBSE 2021
EditorsAmadeo Benavent-Climent, Fabrizio Mollaioli
PublisherSpringer Science and Business Media Deutschland GmbH
Pages71-83
Number of pages13
ISBN (Print)9783030739317
DOIs
Publication statusPublished - 2021
Event1st International Workshop on Energy-Based Seismic Engineering, IWEBSE 2021 - Madrid, Spain
Duration: 24 May 202126 May 2021

Publication series

NameLecture Notes in Civil Engineering
Volume155 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

Conference1st International Workshop on Energy-Based Seismic Engineering, IWEBSE 2021
Country/TerritorySpain
CityMadrid
Period24/05/2126/05/21

Bibliographical note

Publisher Copyright:
© 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Keywords

  • Energy balance equations
  • Energy-based seismic design
  • Inelastic top displacement demand
  • Seismic input energy

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