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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 5: Dynamics and Earthquake Engineering

Seismic behavior of ultra low-yield-point metal as structural control dampers

< Table of Contents for General 5: Dynamics and Earthquake Engineering
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 5: Dynamics and Earthquake Engineering
  • Title: Seismic behavior of ultra low-yield-point metal as structural control dampers
  • Author(s): Kui XIAO, Qilin ZHANG, Xiaoqun LUO
  • Keywords: seismic, low-yield-strength, constitutive model, buckling-restrained brace, aluminum alloy
Abstract
This paper presents some specimen tests made of low-yield-strength metal material. Test results showed that the use of low-yield-strength metal as passive energy dissipative dampers results in small yield deformation, high ductility, dramatic strain hardening and cyclic hardening. Based on the test data, theoretical and numerical analysis has been conducted to evaluate the performance of low-yield-strength metallic buckling-restrained brace (LMBRB). Constitutive model incorporating both isotropic and kinematic hardening with nonlinear evolutionary rules was used to describe the hysterical behavior of the low-yield-strength material. The simulated results show that the cyclic behavior of LMBRB under different loading cases can be simulated sufficiently accurate by the detailed analytical model. Moreover, the influence of the restraining stiffness to the performance of LMBRB is also analyzed to enhance the validity of the theoretical overall buckling prevention condition.

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