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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Seismic Analysis, Behavior & Design

Analysis on seismic damage resilience of single-layer lattice shells based on safety margin

< Table of Contents for Seismic Analysis, Behavior & Design
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Seismic Analysis, Behavior & Design
  • Pages: 10
  • Title: Analysis on seismic damage resilience of single-layer lattice shells based on safety margin
  • Author(s): Zheng He, Tingting Liu
  • Keywords: ultimate seismic strength, seismic damage resilience, collapse margin ratio, single-layer lattice shells, optimal selection range
Abstract
The ultimate seismic strength and seismic damage resilience are important indicators for assessing seismic performance level. Resilience is introduced for quantifying the ability of highly redundant l single-layer lattice shells with certain level of damage due to earthquakes to restore or retain their original seismic capacity. Essentially, it is a kind of safety margin coefficient regarding numerical calculation based on seismic damage. Because of defects caused by randomness of earthquakes, collapse margin ratio can be considered as a seismic capacity index in consideration of influences affected by various earthquakes. Due to various grid forms and non-uniqueness of failure modes, there is not a simply direct proportionality between strength and resilience which are research motivation this article aims at. That is, a precondition for improving seismic resilience is to guarantee the certain level seismic capacity, which gained extensive economic benefit to limit the optimal selection range.

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