Fragility-Based Analysis of Topologically Optimized Timber Building

Felipe Solís, Pablo Parra, Patricio Cendoya

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


The assessment of the seismic performance of timber structures and topology optimization are both widely researched topics in recent years. In addition, the new challenges in sustainability have led to increased use of wood in construction, a material considered to have a negative carbon footprint. This research assesses the seismic response of a topologically optimized structure to be located in Concepcion, Chile. The system corresponds to a five-story glulam braced frame, designed following current Chilean standards, with a structural configuration obtained from a topology optimization process using a Soft-kill BESO algorithm implemented in MATLAB. OpenSees was selected for structural analysis. The nonlinear structural behavior was only considered in joints, using the backbone curves introduced in ASCE 41-13. The seismic performance was determined through static pushover analysis, and later the building fragility curves were approximately calculated at the ASCE 41 performance levels from the pushover curve using SPO2FRAG. Finally, recommendations are made for using topology optimization algorithms in the design process of actual buildings.

Original languageEnglish
Title of host publicationProceedings of the 2022 Eurasian OpenSees Days
EditorsFabio Di Trapani, Cristoforo Demartino, Giuseppe Carlo Marano, Giorgio Monti
PublisherSpringer Science and Business Media Deutschland GmbH
Number of pages9
ISBN (Print)9783031301247
StatePublished - 2023
Externally publishedYes
Event2nd Eurasian Conference on OpenSees Days, EOSD 2022 - Turin, Italy
Duration: 7 Jul 20228 Jul 2022

Publication series

NameLecture Notes in Civil Engineering
Volume326 LNCE
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565


Conference2nd Eurasian Conference on OpenSees Days, EOSD 2022


  • Braced frames
  • Earthquake engineering
  • Fragility curves
  • Pushover analysis
  • Timber structures
  • Topology optimization


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