Structural damage to houses and buildings induced by liquefaction in the 2016 Kumamoto Earthquake, Japan

Setiawan, Hendra; Serikawa, Yuko; Nakamura, Masatoshi; Miyajima, Masakatsu; Yoshida, Minoru

doi:10.1186/s40677-017-0077-x

Cited by 10 publications

(3 citation statements)

References 4 publications

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“…Building damage as resulted from earthquake is associated with the geological rock. As a result of the 2016 Kumamoto Earthquake, Japan, most building damage was associated with the liquefaction process (Setiawan et al 2017). Soil liquefaction that occurred in this area after earthquake was mainly affected by the very loose silt and sand layer at a depth of around 6 m below the ground surface, and the existence of the Kiyama river as well.…”

Section: Residential Building Susceptibilitymentioning

confidence: 99%

Residential Building Damages Related to the Geological Bedrock Variations During M<sub>ww</sub> 5.6 Earthquake in Cianjur, West Java, on November 21, 2022

Wibowo¹

2022

Preprint

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Recently on the November 4, 2022 at 03:00 PM, a Mww 5.6 earthquake struck Cianjur district of West Java province, Indonesia. To our best knowledge, an earthquake will cause a massive damage to the manmade infrastructure and this responsible for a massive casualty. A building damage is affected by various determinant factors. One of important factors is the geological bedrock variations. Here this research aiming to elaborate the associations of geological bedrocks in Cianjur district with residential building damages caused by recent earthquakes. The results confirm that majority of building damages account for 54.67% of the total building was associated with quaternary volcanic bedrocks. The second massive building damages were observed for Andesitic Dacitic volcanic rocks accounted for 32.07%. To conclude, elaborations of geological bedrock-building damage will contribute to the better planning in the future that can reduce the damages in the urban settings.

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Section: Residential Building Susceptibilitymentioning

confidence: 99%

Residential Building Damages Related to the Geological Bedrock Variations During M<sub>ww</sub> 5.6 Earthquake in Cianjur, West Java, on November 21, 2022

Wibowo¹

2022

Preprint

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“…This will result in substantial losses if this damage occurs on vital roads. Moreover, tilted houses and building also could be appeared due to liquefaction, for instance as happened in Kumamoto earthquake 2016, Japan, where it was reported that many residential houses and buildings were tilted due to liquefaction (Setiawan et al, 2017). The use of gravel and geosynthetics in those examples mentioned above will be able to lower the settlement and the related-damages caused by liquefaction.…”

Section: Vertical Ground Displacementmentioning

confidence: 99%

Experimental study on mitigation of liquefaction-induced vertical ground displacement by using gravel and geosynthetics

Setiawan

Serikawa

Sugita

et al. 2018

Geoenviron Disasters

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Background: Earthquakes in liquefaction-prone areas are frequently followed by the settlement of surface structures due to subsoil liquefaction. This paper aims to study the influence of geosynthetics along with gravel usage to reduce the vertical soil displacement caused by liquefaction using a shake table equipment. This influence is analyzed by means of measuring soil acceleration, pore water pressures and vertical soil deformation due to the shaking process. Results: Results of a series of 1-g shaking table tests which have been conducted in different initial relative densities which are 50% (loose sand conditions) and 90% (dense sand conditions) to evaluate the performance of proposed mitigation against settlement problem are presented. It is found that ground settlement reduced around 11.4 mm for loose sand conditions, from 20.9 mm in the case with no countermeasure (Case 1) to 9.5 mm in the Case reinforced with gravel and geosynthetics Type II (Case 4). Correspondingly, for dense sand states, the settlement decreased by about 1.8 mm, from 5.6 mm in the Case 1 to 3.8 mm in Case 4. Moreover, a differential settlement between loose sand and dense sand conditions decreased as well, around 9.6 mm, from 15.3 mm in the Case 1 to 5.7 mm in Case 4. Conclusions: By conducted a series of shake table tests, it is confirmed that the vertical ground displacement decreased by the use of geosynthetics and gravel up to 54% and 32% for loose sand and dense sand states, respectively. Furthermore, test results also show that there is a decrease in the differential settlement between loose sand and dense sand conditions, around 62%.

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“…The structural geometry influenced the tilt of the building, its direction, and the foundation used. Besides, the structural self-weight and soil conditions were also factors causing different damage levels to buildings [7]. Lu et al has investigated the impact of liquefaction on lowrise building in the Meinong Earthquake (2015), Taiwan [8], suggesting that the local site effects are essential to be considered.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Subsidence Angle to Column Demand-Capacity Diagram of a Multistory Building

Syamsi¹,

Harsoyo²,

Cahyati³

et al. 2021

Proceedings of the 4th International Conference on Sustainable Innovation 2020–Technology, Engineering and Agriculture (ICoSITE

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Earthquake is an unpredictable natural disaster, and land subsidence is one of the followed impacts of this disaster. This occurrence can endanger buildings on the disaster area, especially the columns as the central element in the superstructure. This study aims to discover the influence of the inclination angle resulting from the settlement to the axial-moment interaction ratio of the column in a multistory building. The object of this research was Building E functioning for educational purposes and located in the Special Region of Yogyakarta (DIY), Indonesia, with sandy soil conditions. The numerical analysis was simulated by applying the displacement in all supporting systems linearly corresponding to one side-end of a building. Six typical column types in Building E were sampled for investigation, and six variations of inclined subsidence were simulated. Earthquake response spectrum was loaded in all variations of subsidence angle and simulated. The analysis results revealed that several types of columns in Building E was unable to withstand the force after suffering a slope of 0.04°. At the largest simulated angle, 0.1°, only the interior column around the building could be categorized as safe, while several other column types close to the outer perimeter of the building were in critical condition, and some have exceeded their capacity.

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Structural damage to houses and buildings induced by liquefaction in the 2016 Kumamoto Earthquake, Japan

Cited by 10 publications

References 4 publications

Residential Building Damages Related to the Geological Bedrock Variations During M<sub>ww</sub> 5.6 Earthquake in Cianjur, West Java, on November 21, 2022

Residential Building Damages Related to the Geological Bedrock Variations During M<sub>ww</sub> 5.6 Earthquake in Cianjur, West Java, on November 21, 2022

Experimental study on mitigation of liquefaction-induced vertical ground displacement by using gravel and geosynthetics

The Influence of Subsidence Angle to Column Demand-Capacity Diagram of a Multistory Building

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