Pengaruh Percepatan Maksimum Gempa Dari Batuan Dasar Ke Permukaan Terhadap Potensi Likuefaksi di Rumah Sakit Universitas Islam Indonesia

Abstract

In Yogyakarta, a significant seismic event transpired, notably the earthquake of 2006, which had a magnitude of 6.3 on the Moment Magnitude Scale (Mw). The Opak Fault was identified as one of the contributing factors to this earthquake. Researchers endeavored to ascertain the maximum surface acceleration (a max) of this earthquake. This a max value plays a pivotal role in conducting a Cyclic Stress Ratio (CSR) analysis, with the aim of assessing the liquefaction potential at the Islamic University of Indonesia (UII) Hospital. This investigation was conducted at two designated reference points within the UII Hospital premises, employing the Deterministic Seismic Hazard Analysis (DSHA) methodology. The rationale behind this a max analysis lies in its application to CSR calculations, facilitating an understanding of the liquefaction susceptibility at Ull Hospital. This inquiry was particularly pertinent due to the geographical location of UII Hospital, situated in the southern region of Java Island. This area is characterized by a relatively high seismic risk and exhibits the propensity for liquefaction in strata consisting of fine and homogenous grains, notably sandy soils. The results of the research obtained are the effect of a max on liquefaction potential using the DSHA method, namely that the maximum earthquake acceleration can be seen in each layer of soil and the peak acceleration is 0.56g for BM-01 and 0.58g for BM-02, the difference in maximum earthquake acceleration on the surface from the DSHA method with SNI 1726-2019, namely 0.6g for BM-01 and 0.8g for BM-02