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Study on mechanism of wave passage effect on the response of frame structure
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DOI：10.1007/s11803-026-2398-9.png)
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Abstract
En 中文
Frequency effect, in addition to time delay effect, on the response of the frame structure to sinusoidal and earthquake wave passage excitations is studied, respectively. The dynamic equilibrium equation in terms of the displacements of horizontal DOFs for a single-span, one-story plane frame structure subjected to wave passage excitation is formulated, and the relative motion method and mode superposition method are used to solve the dynamic equilibrium equation. The analytical and semi-analytical solutions of structural responses of the frame structure to sinusoidal and earthquake wave passage excitations are given, respectively. A new cognition is obtained that the wave passage effect includes not only time delay effect but also frequency effect. The frequency effect is also the mechanism of wave passage effect for the frame structure. When the excitation frequency is within a range from a frequency slightly bigger than zero to a certain frequency less than the structural fundamental frequency, the lower the excitation frequency, the more significant wave passage effect. Earthquake wave passage effect for the frame structure depends on the low-frequency content of earthquake wave besides time delay, and the more the low-frequency content, the more significant wave passage effect.
Keywords:
wave passage effect
frame structure
analytical solution
earthquake excitation
frequency effect
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3.3
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