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Geologi Teknik Gempa

Jan 14, 2016

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Rizky Nur Fitri

Materi Kuliah Geologi
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  • GEMPA BUMI

  • IDENTIFIKASI RAWAN GEMPA/TSUNAMI

  • RAWAN TSUNAMI

  • Didalam perencanaan Bendungan, small dam, embung, bangunan irigasi dan bangunan air lainnya sangat diperlukan peranan ilmu geologi seperti pendugaan kondisi geologi permukaan sebelum dilakukan identifikasi secara detail melalui sayatan/penampang geologi

  • Tujuan lainnya : Identifikasi kondisi gempa (kegempaan) diwilayah studi untuk desain stabilitas bendungan, pelimpah dll. Angka keamanan harus ditinjau termasuk kondisi gempa

  • IDENTIFIKASI KEGEMPAAN

  • BACKGROUND: Indonesia adalah negara yang terletak pada jalur Gunungapi Lingkar Pacific dan Lintas Asia serta Lempeng Tektonik Asia Selatan (Circum Pacific and Trans Asiatic Volcanic Belt dan South Asia Tectonic Plate). Itulah sebabnya Indonesia mempunyai banyak gunungapi aktif dan seringkali mengalami bencana akibat gunung api maupun gempa tektonik.

  • Mekanisme Gempa

  • Seismic Waves

  • What Controls the Level of Shaking?MagnitudeMore energy releasedDistanceShaking decays with distanceLocal soilsAmplify the shaking

  • GEMPA BUMI (pengertian, klasifikasi dan skala gempa)

  • Total Dam Collapse during 1999 Taiwan Earthquake

    Earthquakes can collapse huge concrete damsLocation: Dam Collapse in Taiwan - October 1999.

  • Some sources link the 2008 China's Sichuan province 7.9 earthquake that killed over 80,000 people to an "unnamed dam: that put 32 million tons of water weight on the earths crust" that "amplified the strain on the earth's crust" in a way that would alter the stresses below"

  • Impression of a failure in the Clyde dam "slip-joint" caused by an earthquake

  • Satellite images show how the Jian valley has filled with water after a landslide blocked the river's flow