Investigation of Ground Motion and Local Site Characteristics of the 2018 Lombok Earthquake Sequence

Pramono, Sigit; Prakoso, Widjojo Adi; Rohadi, Supriyanto; Karnawati, Dwikorita; Permana, Dadang; Prayitno, Bambang; Rudyanto, Ariska; Sadly, Muhamad; Sakti, Artadi Pria; Octantyo, Ardian Y.

doi:10.14716/ijtech.v11i4.3302

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…This shows that the occurrence of earthquakes in Indonesia is very massive, as well as the occurrence of damaging earthquakes in Indonesia. The earthquake event will give a characteristic form of ground motion produced, as well as the results of the recording of the ground motion recorded by the accelerometer station from the Lombok 218 series earthquake (Pramono, S., et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Implementation Early Design of Prototype EEWS Development in Indonesia

Pramono

Utama

Swastikarani

et al. 2023

Preprint

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Tectonic regimes in Indonesia caused the potential occurrence of the earthquake with the variated impact in Indonesia. It could be a threat to people, infrastructure, and economic aspects in Indonesia. All source types such as subduction zones are the big-one event that has been considered to anticipate as part of mitigation implementation for reducing potential victims. Almost all the regions in Indonesia have the probability to be a destructive region by earthquakes. One cluster that is related to that potential threat is Java Island and Sunda strait. The earthquake early warning system (EEWS) is a part mitigation system that has the goal to reduce the impact of destruction by infrastructure collapsed by the earthquake. BMKG (Meteorological Climatological and Geophysical Agency) has committed to making the area denser instruments distribution in the earthquake early warning area. It will spread close to the subduction zone and fault distribution Strong Motion accelerometers and intensitymeter sensors have been installed since 2010, then 2019 have been initiated to develop EEWS in Indonesia for instrument response. Sunda strait and the Southern part of Java Island are a region which has the potential to produce destructive earthquakes which have an impact until the capital city of Indonesia, Jakarta city. The sequence of EEWS development in Indonesia will be started with the utilization of EEWS for some kind of operational system in transportation. It is very important due to the direct impact to people's safety and their lives. Besides using the existing 303 sensors which consist of an accelerometer and intensitymeter, in this project BMKG will use a new 1 accelerometer and 50 intensitymeter sensors in Banten Province, West Java Province, Lampung Province and Jakarta Province. Processing module in this system uses a modified eBEAR module which has many different methods rather than the basic eBear module. The mode of dissemination system is developed by variated modes such as web-based, cube receiver, and mobile phone applications. While developing modules and applications, the empirical formula will be formed by the research of local characteristics to represent actual conditions in certain areas of Indonesia's Earthquake Early Warning System. The EWS is a big challenge for BMKG, due to many things that must be done in order to have a successful EEWS program according to Indonesian conditions.

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Section: Introductionmentioning

confidence: 99%

Implementation Early Design of Prototype EEWS Development in Indonesia

Pramono

Utama

Swastikarani

et al. 2023

Preprint

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“…Indonesia should move forward to PBD for the bottom structure since based on the recent seismic risk map, where the ground acceleration tends to increase (Pramono et al, 2020). Hence, the structural component should have adequate ductility.…”

mentioning

confidence: 99%

The Evaluation of Displacement Ductility of Low Confinement Spun Pile to Pile Cap Connections

Orientilize,

Prakoso,

Lase

et al. 2023

IJTech

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Experimental study was carried out on three low confinement spun piles to pile cap connections. The detail followed the typically fixed connection in Indonesia. Reinforced concrete was filled to the spun pile to strengthen the connection region, except SPPC01. Different concrete types were used, shrinkage and non-shrinkage for SPPC02 and SPPC03, respectively. SPPC02 and SPPC03 could reach the targeted drift of 3.5% whereas SPPC01 was stopped at a drift of 2.75%. There was no shear failure detected during the test. The connection behaved as a fixed connection indicated by the fracture failure of the prestressed bars near the connection region. Analysis of the test results focused on displacement ductility. Two definitions of yield and ultimate displacement were employed to seek the possible ductility values. It varied from 3.05 to 6.04 for SPPC01 and from 3.01 to 4.95 for SPPC02 and SPPC03. The non-shrinkage concrete did not affect the strength of the connection but slightly improved the post-peak behavior. The ductility is 6-12% higher than spun piles with ordinary concrete. According to the limited ductility referring to ATC 96, JRA 2002, and AASHTO 2011, all specimens could achieve target ductility 3. Hence, it can be concluded that the low confinement spun pile connections performed well in displacement ductility.

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Investigation of Ground Motion and Local Site Characteristics of the 2018 Lombok Earthquake Sequence

Cited by 2 publications

References 11 publications

Implementation Early Design of Prototype EEWS Development in Indonesia

Implementation Early Design of Prototype EEWS Development in Indonesia

The Evaluation of Displacement Ductility of Low Confinement Spun Pile to Pile Cap Connections

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