Structural Engineering and Mechanics
Volume 12, Number 3, 2001, pages 341-346
DOI: 10.12989/sem.2001.12.3.341
Effects of strong ground motions of near source earthquakes on response of thin-walled L-shaped steel bridge piers
Guanmo Xie(China) , Takeo Taniguchi , Nawawi Chouw(Japan)
Abstract
Near source earthquakes can be characterized not only by strong horizontal but also by<br />strong vertical ground motions with broad range of dominant frequencies. The inelastic horizontal<br />response of thin-walled L-shaped steel bridge piers, which are popularly used as highway bridge supports,<br />subjected to simultaneous horizontal and vertical ground excitations of near source earthquakes is<br />investigated. A comprehensive damage index and an evolutionary-degrading hysteretic model are applied.<br />Numerical analysis reveals that the strong vertical excitation of a near source earthquake exerts<br />considerable influences on the damage development and horizontal response of thin-walled L-shaped steel<br />bridge piers.
Key Words
near source earthquakes; strong vertical ground motion; thin-walled steel bridge piers; inelastic response; damage index; evolutionary-degrading hysteretic model.
Address
Guanmo Xie, Department of Engineering Mechanics, Wuhan University of Technology, Wuhan 430070, China<br />Takeo Taniguchi and Nawawi Chouw, Department of Environmental and Civil Engineering, Okayama University, Okayama 700-8530, Japan
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