延性系数和调幅因子对等延性强度谱的影响分析

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Abstract Abstract:In current structural seismic design, it is very common to match amplitude-modulated ground motion records with the standard spectra.To analyze the influence of ductility coefficient and amplitude modulation factor on the constant-ductility strength spectra, in this paper, the influence of ductility factor and amplitude modulation factor on the constant-ductility yield strength spectra and constant-ductility seismic resistance spectra was analyzed by calculating the dynamic time-history inelastic response of a single-degree-of-freedom system.Through research and analysis, the change regulation of constant-ductility yield strength spectra and constant-ductility seismic resistance spectra under different ductility coefficient and amplitude modulation factor conditions was obtained.When the period was determined, the constant-ductility seismic resistance spectra value increased and decreased when the amplitude of ground motion was modulated, but the constant-ductility yield strength spectra did not change; When the ductility coefficient increased gradually, the constant-ductility yield strength spectra values and constant-ductility seismic resistance spectra values decreased gradually.The results explain and illustrate the influence of ductility coefficient and amplitude modulation factor on constant-ductility intensity spectra and the relationship between complex seismic action and structural dynamic characteristics, which provide a basis for seismic research and design of structures.

Key words： constant-ductility strength spectra elastic-plasticresponse ductility factor amplitude modulation coefficient

Received: 01 November 2018 Published: 15 April 2020

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	Articles by authors
	LAI Qinghui1
	HU Jinjun1
	FAN Yuan2
	XIE Lili1

Cite this article:

LAI Qinghui1,HU Jinjun1,FAN Yuan2, et al. Analysis of the influence of ductility factor and amplitude modulation coefficient on the constant-ductility strength spectra[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(8): 131-135.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I8/131

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