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Evi Aprianti
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International Association of Lowland Technology In Collaboration with Hasanuddin University and Saga University Address Faculty of Engineering, Center of Technology Building, 1st Floor Jalan Poros Malino km. 6, Bontomarannu, Gowa Indonesia Postal Code: 91711
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Lowland Technology International
Published by International Association of Lowland Technology
ISSN : 13449656     EISSN : 21878870     DOI : https://doi.org/10.0001/ialt_lti
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Transportation
The Lowland Technology International Journal presents activity and research developments in Geotechnical Engineering, Water Resources Engineering, Structural Engineering, Transportation Engineering, Urban Planning, Coastal Engineering, Disaster Prevention and Mitigation Engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 463 Documents
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Investigation on the damage to Kumamoto Castle stone wall related to the 2016 Kumamoto Earthquakes T. Ohsumi
Lowland Technology International Vol 19 No 3, Dec (2017)
Publisher : International Association of Lowland Technology

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Abstract

A major earthquake with a magnitude (MJMA) 6.5 foreshock and a MJMA 7.3 main shock occurred at 1:25 on April 14 and 21:26 on April 16, 2016, respectively, in the Kumamoto region. According to the Kumamoto Castle research center, the reported damages to Kumamoto Castle included 23 important cultural properties, the 27 reconstructed structures and 523 stone wall deformations. Thirty percent of all of the stone walls were damaged. The stone wall foundation used two different construction techniques from the Kato age and Hosokawa age. The damage patterns with respect to the shapes of the stones in the walls were investigated and compared. The damaged stone walls which related to the main shock, were mainly constructed Hosokawa ages. In addition, the damage patterns in the reinforced concrete reconstructed Castle Keeps (Tensyu) / turrets (Yagura) and existing historical wooden structures were compared.
Sediment disasters caused by the 2016 Kumamoto Earthquake and regional disaster history M. Suzuki; K. x Kagohara; K. Sakaguchi; H. Matsugi; S. Kataoka
Lowland Technology International Vol 19 No 3, Dec (2017)
Publisher : International Association of Lowland Technology

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Abstract

In the 2016 Kumamoto earthquake, a lot of landslides, slope failures and debris flows occurred in mountainous regions around Mt. Aso. Most of the failed slopes were located near the earthquake faults caused strong vibrations. Although there was very little rainfall before the earthquakes, debris flows occurred along the mountain streams and eventually travelled long distances. It is noted that volcanic soil, being fragile and sensitive to disturbances, was widely distributed within the affected area. In this research, the conditions of large-scale failure, landslide, and debris flow are investigated to clarify the characteristics and history of earthquake-induced sediment disasters in the volcanic regions based on the results obtained from our investigation.
Liquefaction during the Kumamoto Earthquakes on April 14 and 16, 2016 K. Wakamatsu; S. Senna; K. Ozawa
Lowland Technology International Vol 19 No 3, Dec (2017)
Publisher : International Association of Lowland Technology

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Abstract

At 21:26 JST on April 14, 2016, an earthquake with a Japan Metrological Agency Magnitude (MJMA) of 6.5 struck Kumamoto Prefecture, Kyushu, in southwestern Japan. This earthquake was followed by a larger earthquake with an MJMA of 7.3 at 1:25 JST on April 16, 2016. These were the most severe earthquakes to occur in Japan since the Tohoku earthquake in 2011. The hypocenters of the strike-slip MJMA 6.5 foreshock and MJMA 7.3 main shock and, along with the aftershocks, were widely distributed along the active Futagawa-Hinagu strike-slip fault. This paper first presents the distribution of the liquefied sites during these earthquakes and their effects on the surrounding buildings and infrastructure. Next, the distance from the epicenter to the farthest liquefied site is compared with past Japanese earthquakes, followed by a discussion on the intensities of the ground motion that caused the liquefaction. Finally, the land conditions and soil profiles where severe and widespread liquefaction occurred are investigated.
Geotechnical damage due to the 2016 Kumamoto Earthquake and future challenges H. Hazarika; T. Kokusho; R.E. Kayen; S. Dashti; H. Fukuoka; T. Ishizawa; Y. Kochi; D. Matsumoto; H. Furuichi; T. Hirose; T. Fujishiro; K. Okamoto; M. Tajiri; M. Fukuda
Lowland Technology International Vol 19 No 3, Dec (2017)
Publisher : International Association of Lowland Technology

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Abstract

The 2016 Kumamoto earthquake with a moment magnitude of 7.0 (Japanese intensity = 7) that struck on April 16 brought devastation in many areas of Kumamoto Prefecture and partly in Oita Prefecture in Kyushu Region, Japan. The earthquake preceded a foreshock of magnitude 6.5 (Japanese intensity = 7) on April 14. This paper summarizes the damage brought to geotechnical structures by the two consecutive earthquakes within a span of twenty-eight hours. The paper highlighted some of the observed damage and identifies reasons for such damage. The geotechnical challenges towards mitigation of losses from such earthquakes are also suggested.
Instability of residences founded on volcanic cohesive soils during the 2016 Kumamoto Earthquake K. Yasuhara; H. Watanabe; K. Kobayashi; M. Yoshimi; Y. Arai; S. Hosoya; M.S. Tajiri; S. Murakami
Lowland Technology International Vol 19 No 3, Dec (2017)
Publisher : International Association of Lowland Technology

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Abstract

This paper is intended to describe that the nonlinearity of seismic response for soft deposits is associated with the cyclic degradation of strength and stiffness in shallow deposits of cohesive volcanic ash soils, which caused devastation to residences. Using the simplified methodologies proposed previously by the authors, which incorporate cyclic strength and stiffness degradation characteristics of saturated cohesive soils, prediction was conducted for residential settlement and lateral deformation of residences with retaining walls founded on and against a shallow layer of cohesive volcanic ash soils. A chart for construction management incorporating the results in terms of earthquake-induced settlement vs. lateral deformationsettlement relations predicted the use of the methodology described above. Results suggest that residences are likely to sustain severe damage when the normalized excess pore pressures generated during the earthquake extend to about 0.7. Results also show that damage to retaining walls was also associated with earthquake-induced strength degradation of backfill soils.
A basic analysis on urban landscape continuity in a lowland urban heritage using deep learning-based method Mohamed Rami Derbel; Jihed Makhlouf; Nobuo Mishima
Lowland Technology International Vol 22 No 2 (2020): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v22i2, Septemb.520

Abstract

Architectural intervention in urban heritage area is subject to numerous parameters making it a time-consuming process. Urban façade analyses are also one of the required long-term tasks held by the architect, especially in urban heritage area where pressure concerning the neighborhood harmony is often faced. To address this issue, we here present a computer vision method for an automatic evaluation of the urban façade, by comparing a set of façade’s pictures. Our target area is Hizenhamashuku, in a “preservation area of traditional buildings” located in Kashima city, which is a typical lowland city in Saga prefecture. In this project we explore possibilities to boost the performance of urban facades study using a deep learning method. We developed an algorithm able analyze pictures of buildings from different historic eras with different historic styles, regarding any selected feature. First, an objective feature, such us the orientation of the building which, having a unique parameter, prevent from bias and thus its results can be used as reference. Next in order, a more subjective parameter such as the quality of insertion is tested, results are quantified and compared in order to evaluate the algorithm performance and enhance it in further research
Geological history reviews and geological aspects of shallow volcanic soil related to earthquake-induced landslide in Kumamoto 2016 T.T.T. Tran; H. Hazarika
Lowland Technology International Vol 19 No 4, March (2018)
Publisher : International Association of Lowland Technology

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Abstract

This paper aims to investigate geological conditions of shallow volcanic soil at the landslides effected area in Aso Volcanological Laboratory, Minamiaso Village, Kumamoto Prefecture, Japan that is caused by Kumamoto earthquake during April 14 to April 16, 2016. Earthquake-induced landslides occurred in Aso Volcanological Laboratory are characterized by long flows covering large areas with inclination of about 11o. The slope was composed dominantly of volcanic ash layers those have been altered to soil layers with different colours and engineering properties. Geological aspect of shallow soil profile includes volcanic lava and ash-fall tephra those are younger than 31ka lies on the old Takanoobane volcanic deposit (51ka). The Kusasenrigahama pumice-derived soil has been considered as the main source of the landslide.
Evaluation of seismically induced slope displacement by energy approach and applicability to a Case Study related to the 2016 Kumamoto Earthquake T. Ishizawa; T. Kokusho
Lowland Technology International Vol 19 No 4, March (2018)
Publisher : International Association of Lowland Technology

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Abstract

The energy approach for slope failure evaluation has been developed by examining the energy balance in the rigid block model, comparing it to innovative shake table tests of sand model slope. As a result, previous studies have shown evaluation method is proposed in which residual slope displacement can be given from the earthquake energy. Moreover, a framework of performance-based design for slopes during earthquakes has been proposed. However, this energy method needs to have more research to upgrade the energy method to a reliable design tool. Therefore, the energy-based method was applied to a case history during the 2016 Kumamoto earthquake. The input earthquake energy defined as a base layer of the slope was extrapolated from severalstrong motion records. This paper discusses applicability of the energy-based method to a case history, during the 2016 Kumamoto earthquake, of the sliding-mass was travelled gentle slope along the clear slip plane, as a simplified rigid block model.
Deformation and failure characteristics of Volcanic soil at landslides site due to the 2016 Kumamoto Earthquake W. O. Sumartini; H. Hazarika; T. Kokusho; S. Ishibashi; D. Matsumoto; B. Chaudhary
Lowland Technology International Vol 19 No 4, March (2018)
Publisher : International Association of Lowland Technology

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Abstract

A chain of earthquakes with a maximum moment magnitude of 7.3 MW struck Kumamoto prefecture and its vicinity from April 14-16th, 2016. It generated widespread landslides not only on steep slopes but also on gentle slopes. The landslides caused huge damages to nature, infrastructure, and loss of lives. Thus, it is crucial to determine the failure mechanism of those slopes which were formed by volcanic soil and to elucidate the effect of cyclic loading on strength characteristics of the soil. A series of investigations of the soil, which is orange colored, was conducted. Undrained static and cyclic triaxial tests were performed. Also, x-ray powder diffraction test, x-ray fluorescence test, and scanning electron microscope test were performed for further understanding of the material behavior. The triaxial test revealed semi dilative behavior under monotonic loading with small confining stress and contractive behavior on high confining stress. In the cyclic triaxial tests under in situ confining stress, cyclic mobility by lower cyclic stress and flow failure by higher cyclic stress was observed. Also, soil fabric, chemical composition, and mineral composition, which describe the deformation behavior and failure characteristics of the soil has been reported.
Analysis of liquefaction of volcanic soil during the 2016 Kumamoto Earthquake based on boring data K. Ogo; H. Hazarika; T. Kokusho; D. Matsumoto; S. Ishibashi; W. O. Sumartini
Lowland Technology International Vol 19 No 4, March (2018)
Publisher : International Association of Lowland Technology

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Abstract

On April 16th, 2016 Kumamoto earthquake registering 7 on Japanese scale caused liquefaction in many places around Kumamoto plain. However, considering the magnitude and the distance from the hypocenter, the liquefaction-induced damage was not so huge. Most of sand boiling was observed where liquefaction is likely to happen such as near waters and on an old river channel. In addition, black sand which seems to be volcanic soil was observed as ejecta of liquefaction in many places. This paper deals with the liquefaction characteristics of volcanic soil through physical and mechanical testing, microscopic observation by SEM and liquefaction susceptibility evaluation based on boring data. According to the physical testing, the grain size distribution was typical of liquefaction susceptible sand. Many of sand boils happened on the alluvial ground, and the thick strata of volcanic soil were found there. Based on the results of liquefaction evaluation, some locations have shown the liquefaction susceptibility in spite the fact that little occurrence of liquefaction took place at those locations.

Page 31 of 47 | Total Record : 463

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