The Analysis of Nonlinear Fundamental Vibration Period of Taipei Basin

• Main Authors: Huei-Je Chen, 陳輝哲
• Other Authors: Shi-Shuenn Chen
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/85926596910030407037

碩士 === 國立臺灣科技大學 === 營建工程系 === 92 === The dynamic responses of the layered soils under strong earthquakes are highly nonlinear, which are related to the characteristics of the sites and the magnitude and source mechanism of earthquakes, etc. If the nonlinear fundamental vibration periods can be accurately estimated for a earthquake resistant design ,the response of a structure may be significantly decreased and the damage induced by the resonance effect and the disasters caused by the earthquake may be reduced. This research investigates the effects of earthquake durations and peak accelerations on the nonlinear fundamental vibration periods by artificial earthquakes. It is shown that the nonlinear fundamental vibration periods are not affected hardly by the earthquake durations, while these periods are increased with peak accelerations of the bedrock. The soil properties and the recorded earthquakes of Taipei basin are used in this thesis for analysis. Results of the analysis show that the nonlinear fundamental vibration periods increase with peak accelerations and magnitudes of the earthquake. Furthermore, nonlinear fundamental vibration period regression formula of Taipei basin are developed for magnitudes between 6.0 to 7.5. The nonlinear fundamental vibration periods of Taipei basin may be estimated by giving the elastic fundamental vibration period of the soil site、the peak acceleration and the magnitude of a earthquake.