A study on using pre-bent steel strips as seismic energy-dissipative devices

Yen-Po Wang*, Chia Shang Chang Chien

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Buckling is usually conceived as an unstable structural behavior leading to lateral instability of axially loaded members, if not properly supported. However, a pre-bent strip would become an excellent seismic energy-dissipative device if it is deformed in a guided direction and range. Geometrically large lateral deformation of the steel strips in buckling leads to inelastic behavior of the material and dissipates energy as a consequence. The purpose of this study is to propose a new type of seismic damper in the form of braces based on pre-bent steel strips. The nonlinear elastic stiffness of monotonously loaded pre-bent strips in both compression and tension is derived. The energy-dissipative characteristics of the proposed damping device are investigated via component tests under cyclic loads. Experimental results indicate that the force-displacement relationship of pre-bent strips in cyclic loads exhibits mechanical characteristics of displacement-dependent dampers. A series of seismic performance tests has been conducted further to verify the feasibility and effectiveness of using the proposed device as seismic dampers. Encouraging test results have been obtained, suggesting feasibility of the proposed device for earthquake-resistant design.

Original languageEnglish
Pages (from-to)1009-1026
Number of pages18
JournalEarthquake Engineering and Structural Dynamics
Volume38
Issue number8
DOIs
StatePublished - 10 Jul 2009

Keywords

  • Buckling
  • Buckling-type energy-dissipative damper
  • Hysteretic loops
  • Pre-bent strip
  • Shaking table test

Fingerprint Dive into the research topics of 'A study on using pre-bent steel strips as seismic energy-dissipative devices'. Together they form a unique fingerprint.

Cite this