Naslov
Dynamic Analysis of rock slope in Duće area

Autori
Wang, Chunxiang ; Marui, Hideaki ; Vlastelica, Goran ; Furuya, Gen ; Watanabe, Naoki

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts/4th workshop of the Japanese -Croatian project on Risk Identification and Land-Use Planning for Disaster Mitigation of Landslides and Floods in Croatia / Vlastelica, Goran ; Andrić, Ivo ; Salvezani, Daša - Split : Fakultet građevinarstva, arhitekture i geodezije Sveučilišta u Splitu, 2013, 25-25

ISBN
978-953-6116-46-1

Skup
4th project workshop of the Japanese -Croatian project on Risk Identification and Land-Use Planning for Disaster Mitigation of Landslides and Floods in Croatia

Mjesto i datum
Split, Hrvatska, 12.12.2013. - 14.12.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
rockfall; Dynamic Analysis; discontinuum; UDEC

Sažetak
With hundreds of investigated active and potential rockfall zones, the Duće and Omiš areas in the Dalmatian region ranks high on a risk scale for property and infrastructure destruction and potential for loss of life. Omiš and Duće areas are geologically different areas but with the same problem. Basically, cliffs over the town of Omiš are made of limestone, while the slopes in Duće area are formed in Eocene flysch formation. In the periods of earthquake and heavy rainfall, there is a problem with sudden rock falls. In both places, near the foot of cliffs and slopes there are residential areas with numerous dwellings. Houses and inhabitant lives are jeopardized with the potential fall of a very large stone blocks. In this study, because of shortage of the digital elevation data in the Omiš area, we just analyzed the behavior of the rock slope and rockfall in the Duće area. The analyses of static and dynamic rock slope stability and the dynamic movement process of rockfall in the Duće area are were performed using the distinct element code UDEC (Universal Distinve Element Code). When the stability of the rock slope is controlled by movement of joint-bounded blocks, the use of discontinuum discrete-element codes, which allow one to conduct fully dynamic analyses under plane-strain conditions, are more appropriate than the continuum codes. The stability analyses have been carried out in two stages for predicting the behavior of the rock slope and rockfall. First, an initial static loading is applied in the numerical model. Second, a seismic loading is applied to simulate dynamic earthquake conditions. An important issue in the evaluation of potential hazard related to rockfalls is the quantitative prediction of the traveling distance of the falling blocks, which is necessary to identify the potentially endangered houses. This information is also fundamental for the design of appropriate defensive works, which are intended to reduce the potential impact of the landslide on the population and facilities potentially at risk. Obtaining a reliable estimate of this quantity is complicated by the interaction of the rocks and the slope surface that can affect the behavior of the blocks at the impacts. In this study, the dynamic movement trajectory for a rock block falling on the Duće slope is simulated. The study in this paper provides an illustration of how the geo-mechanical properties of a rock mass can be integrated in a discontinuum rock slope model. This model aims to help to better understand the dynamics of the rockfall in the Duće area when subjected to static and dynamic loads.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Građevinarstvo

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