Kuo, Tzu LungTzu LungKuoChu, Min ChienMin ChienChuTsai, Chi ChinChi ChinTsaiJhuo, Yu SyuanYu SyuanJhuoYU-NING GE2024-03-012024-03-012023-12-0119908326https://scholars.lib.ntu.edu.tw/handle/123456789/640104Previous studies have shown that the Microbial-induced calcite precipitated (MICP) method can enhance the engineering properties of soil. However, the effect of MICP on dynamic soil properties has been rarely explored. Therefore, this study aims to investigate the dynamic properties of MICP-treated sand with varying densities using a resonant column test. Specifically, we compare the small strain shear modulus, shear modulus reduction curve, and damping curve of untreated samples and those treated for different periods. The results show that MICP treatment results in a slight decrease in small strain shear modulus, more reduction in the modulus reduction curve, and higher damping. Dense sand is found to exhibit more changes in dynamic soil properties than loose sand. Therefore, we suggest a correction factor to obtain the modulus reduction curve of MICP-treated sand from that of untreated sand with different relative densities.damping curve | MICP | resonant column test | shear modulus reduction curve | small strain shear modulusjournal article10.6310/jog.202312_18(4).72-s2.0-85184034696https://api.elsevier.com/content/abstract/scopus_id/85184034696