Earthquake acceleration amplification based on single microtremor test

Global Colloquium on GeoSciences and Engineering 2017

Syahbana, Arifan Jaya^1,2 ; Kurniawan, Rahmat^2 ; Soebowo, Eko^1

Geotechnology Research Center, LIPI, Indonesia^1

Bandung Institute of Technology, Indonesia^2

关键词: Acceleration-time history;    Amplification factors;    De aggregations;    Earthquake acceleration;    Fitting curves;    Natural period;    Soil behaviour;    Velocity-time history;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/118/1/012043/pdf
DOI  :  10.1088/1755-1315/118/1/012043

来源: IOP

【 摘 要 】

Understanding soil dynamics is needed to understand soil behaviour, including the parameters of earthquake acceleration amplification. Many researchers now conduct single microtremor tests to obtain amplification of velocity and natural periods of soil at test sites. However, these amplification parameters are rarely used, so a method is needed to convert the velocity amplification to acceleration amplification. This paper will discuss the proposed process of changing the value of amplification. The proposed method is to integrate the time histories of the synthetic earthquake acceleration of the soil surface under the deaggregation at that location so the time histories of the velocity earthquake will be obtained. Next is to conduct a "fitting curve" between amplification by a single microtremor test with amplification of the synthetic earthquake velocity time histories. After obtaining the fitting curve time histories of velocity, differentiation will be conducted to obtain fitting curve acceleration time histories. The final step after obtaining the fitting curve is to compare the acceleration of the "fitting curve" against the histories time of the acceleration of synthetic earthquake at bedrocks to obtain single microtremor acceleration amplification factor.