The Amplification Effect of Soft Site Based on Records from Borehole Arrays

Data recorded by borehole arrays with sensors installed at surface and geologic layers provide critical information for studies of local site amplification effects. The stations of KiK-net strong-motion seismograph network contain detailed information about the condition of site soil, we can judge the site categories according to these information. The stations have collected a large number of seismic records since operated. These seismic records can be downloaded free from the website of KiK-net if you are the register of the website. This paper select 30 sites-type III and 9 sites-type IV from KiK-net strong-motion seismograph network according to the China code for seismic design of buildings (GB50011-2010), and calculate Amplification Coefficient and Site Coefficient by seismic records from the selected stations. Using above information, this paper give their probability distribution and mean value.