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Influence Of Densification Method On Some Aspects Of Undrained Silty Sand Behavior, Mehmet Murat Monkul, Jerry A. Yamamuro 2010 Oregon State University, Corvallis, OR

Influence Of Densification Method On Some Aspects Of Undrained Silty Sand Behavior, Mehmet Murat Monkul, Jerry A. Yamamuro

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Different specimen preparation methods such as moist tamping, dry funnel deposition, slurry deposition, dry air pluviation have been reported in the literature to investigate the undrained behavior of silty sands. Similarly, different means have been used to densify the soils prepared with such methods. Ongoing research shows that the change in undrained behavior (e.g. change in initial peak deviator stress and instability angle) due to different deposition densities is significantly affected by the densification technique utilized within a particular deposition method. It is believed that those variations are closely related with changes in the initial soil fabric that is ...


New Methods To Remove Arsenic From Soils, R. N. Khare 2010 Shri Rawatpura Sarkar Institute of Technology, India

New Methods To Remove Arsenic From Soils, R. N. Khare

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

In Chhattisgarh State, arsenic content in soil is usually moderate to high. However, on some industrial sites like in Bhilai Steel Plant Bhilai, certain effluent discharges can lead to high concentrations of this chemical in the soil. After periods of rainfall and runoff, arsenic can also be found in water. In this context, Indian researchers investigated the potential of contaminations to remove arsenic from contaminated soils and waters. In addition, Electrokinetic model is developed in laboratory which has shown that, depending on soil conditions, these models are able to remove heavy metals in polluted soils by 85-90%. Overall, this research ...


Attenuation Of Traffic Induced Ground Borne Vibrations Due To Heavy Vehicles, Ozgur L. Ertugrul, Deniz Ulgen 2010 Middle East Technical University, Turkey

Attenuation Of Traffic Induced Ground Borne Vibrations Due To Heavy Vehicles, Ozgur L. Ertugrul, Deniz Ulgen

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Traffic induced vibrations, which are transmitted through the ground, may interfere with the proper operation of vibration sensitive equipments and cause nuisance on local population. Influence of these vibrations on surrounding buildings and sensitive devices play an important role on acceptance of the projects. In this study, main objective is the estimation of ground-borne vibration levels due to operation of heavy vehicles at two different sites where soil type and stratification significantly differs. For this purpose, site specific vibration surveys are conducted. A series of dynamic finite element modeling analyses are performed to predict actual vibration records at measurement points ...


Coupled Cwt Spectrogram Analysis And Filtration: New Approach For Surface Wave Analysis (A Case Study On Soft Clay Site), Sri Atmaja P. Rosyidi, Mohd. Raihan Taha, Zamri Chik 2010 Muhammadiyah University of Yogyakarta, Indonesia

Coupled Cwt Spectrogram Analysis And Filtration: New Approach For Surface Wave Analysis (A Case Study On Soft Clay Site), Sri Atmaja P. Rosyidi, Mohd. Raihan Taha, Zamri Chik

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Surface wave analysis consists of generation, measurement and processing of the dispersive Rayleigh waves recorded from two or more vertical transducers. However, in case of soft clay soil, the reliable dispersion curve is difficult to be produced particularly at the frequency below 20 Hz. Some noises from nature and other human-made sources may disturb the generated surface wave data. In this paper, coupled analysis of continuous wavelet transform (CWT) spectrogram analysis based on Gaussian Derivative function was used to analyze the seismic waves in different frequency and time. First analysis is time-frequency wavelet spectrogram which was employed to localize the ...


Dynamic Analysis Of Piles Under Lateral Harmonic Vibration, Mahmoud Ghazavi, Ahmad Dehghanpour 2010 K.N. Toosi University of Technology, Iran

Dynamic Analysis Of Piles Under Lateral Harmonic Vibration, Mahmoud Ghazavi, Ahmad Dehghanpour

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

This paper presents a new mathematical approach for the analysis of harmonically vibrating horizontal, linear, elastic uniform pile. The soil properties may vary from layer to layer. No separation is allowed at the soil-pile interface. The pile is modeled as a number of cylindrical segments connected by rigid nodes. The length of each segment is chosen such that the effects of the soil inhomogenity are accounted for. The governing differential equation for an arbitrary pile segment is obtained and solved. According to the pile support types such as pinned, fixed and free conditions, first an arbitrary appropriate value for either ...


Preface, Shamsher Prakash 2010 Missouri University of Science and Technology

Preface, Shamsher Prakash

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

No abstract provided.


Design Of An External Waste Rock Dump In An Opencast Coal Mine Standing Against A Hill In Seismic Prone Area Of India, Indrajit Roy 2010 Birla Institute of Technology, India

Design Of An External Waste Rock Dump In An Opencast Coal Mine Standing Against A Hill In Seismic Prone Area Of India, Indrajit Roy

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Landslides in external waste dump(i.e. waste rock material dumped outside the quarry) of Tikak opencast coal project, North Eastern Coalfield(NEC), (located in north eastern part of India) is a major hindrance to sustain coal production of 0.6-0.7 million ton per annum from NEC. The external dump is standing against a hill slope of 8 degree inclination and the quarry operation is going on the other side of the hill (Fig1). The present height of the external dump is 80metre which is planned to be increased to 180m. The project is situated in seismic zone – V ...


Dynamic Slope Stability Analysis By A Reliability-Based Approach, Dalia S. Youssef Abdel Massih, Abdul-Hamid Soubra, Jacques Harb, Mohamed Rouainia 2010 National Council For Scientific Research, Lebanon

Dynamic Slope Stability Analysis By A Reliability-Based Approach, Dalia S. Youssef Abdel Massih, Abdul-Hamid Soubra, Jacques Harb, Mohamed Rouainia

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The analysis of earth slopes situated in seismic areas has been extensively investigated in literature using deterministic approaches where average values of the input parameters are used and a global safety factor or a permanent displacement at the toe of the slope is calculated. In these approaches, a decoupled analysis is usually performed in which a constant critical seismic acceleration is first calculated based on a pseudo-static representation of earthquake effects. Then, the permanent soil displacement is computed by integration of the real acceleration record above the critical acceleration. A reliability-based approach for the seismic slope analysis is introduced in ...


Earthquake Induced Slope Failure Simulation By Sph, Ha H. Bui, R. Fukagawa, K. Sako, Y. Okamura 2010 Ritsumeikan University, Japan

Earthquake Induced Slope Failure Simulation By Sph, Ha H. Bui, R. Fukagawa, K. Sako, Y. Okamura

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Majority of slope stability, slope displacement and soil liquefaction analyses subjected to earthquake loading condition employed the finite element method (FEM) as the standard numerical tool. However, mechanism of soil failure in such condition often involved extremely large deformation and failure behaviors, which were unable to be modeled by FEM since this method was suffered from the grid distortion. In an attempt to overcome this limitation, we present herein our first attempt to extend the smoothed particle hydrodynamics (SPH) method to analyze slope failure behavior due to seismic shaking. For the sake of simplicity, effect of pore-water pressure was not ...


Effect Of A Slope On The Dynamic Properties Of Diluvial Terrace, Shoichi Nakai, Yoko Nagata, Toru Sekiguchi 2010 Chiba University, Japan

Effect Of A Slope On The Dynamic Properties Of Diluvial Terrace, Shoichi Nakai, Yoko Nagata, Toru Sekiguchi

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

It is well known that landform influences the behavior of the ground during earthquakes. The objective of this study is to clarify the effect of a slope on the dynamic properties of diluvial terrace based on ground investigations, seismic motion observations and twodimensional finite element analyses, by choosing a target area that has a landform typical to the southern Kanto plain in Japan. Through the study, the followings were found: (1) Due to a weak soil along the slope, amplification becomes very large, but the area of influence is relatively small. (2) Amplification due to ground irregularity itself is relatively ...


Effect Of Canyon Geometry And Ground Conditions On The Seismic Performance Of Tendaho Earthfill Dam In Ethiopia., Tensay G. Berhe, Wu Wei 2010 Institute of Geotechnical Engineering, BOKU, Austria

Effect Of Canyon Geometry And Ground Conditions On The Seismic Performance Of Tendaho Earthfill Dam In Ethiopia., Tensay G. Berhe, Wu Wei

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The seismic performance of earth dams is usually studied by two dimensional (2D) space. However, considerable judgment is required to estimate the overall three dimensional dynamic response of dams in a narrow canyon from plane strain analyses of individual sections of the dam. This is so because the plane strain analysis normally ignores the arching effect of the valley which is particularly relevant for dams in narrow valleys. Because of the arching action, the effect of the canyon geometry on the dynamic response of earth dams will be a stiffening of the system. The effect of the canyon geometry is ...


Evaluation Of Seismic Response Of External Mine Overburden Dumps, Radhakanta Koner, Debashish Chakravarty 2010 Indian Institute of Technology, India

Evaluation Of Seismic Response Of External Mine Overburden Dumps, Radhakanta Koner, Debashish Chakravarty

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The stability of mines external overburden dump slope experiencing an earthquake is controlled by deformations; consequently a stability analysis that predicts slope displacements is desirable. The amount of displacement, deformation occur at the crest of the overburden dumps is an important factor for the seismic loading response of the dumps for the field personnel at the mine site for designing the dump slope geometry. The state of effective stress and seismic intensity significantly affects the stability range. In this paper, a simplified approach is presented for the seismic response of overburden dumps, and the role played by relevant parameters such ...


Finite Element Modeling Of The Las Colinas Landslide Under Earthquake Shaking, Huynh Dat Vu Khoa, Hans Petter Jostad 2010 Norwegian Geotechnical Institute, Norway

Finite Element Modeling Of The Las Colinas Landslide Under Earthquake Shaking, Huynh Dat Vu Khoa, Hans Petter Jostad

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The Las Colinas landslide that occurred at Santa Tecla (El Salvador, Central America) due to the earthquake of 13 January 2001 is considered as one of the most destructive landslides ever known. This paper studies the ability of Hill’s sufficient condition of stability (1958), which is based on the sign of second-order work, for predicting and describing this catastrophic massive landslide. The general expressions of both local and global second-order work criteria and its implementation into finite element codes are given. By using the non-associated elasto-plastic Hardening Soil Model and the local second-order work criterion, it is demonstrated that ...


Geotechnical Characteristics Of Seismically-Induced Aratozawa Landslide, Japan, Ivan Gratchev, Ikuo Towhata 2010 The University of Tokyo, Japan

Geotechnical Characteristics Of Seismically-Induced Aratozawa Landslide, Japan, Ivan Gratchev, Ikuo Towhata

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

This paper seeks to investigate the properties of volcanic soil from the Aratozawa landslide, the largest failure triggered by the 2008 Iwate-Miyagi Nairiku earthquake, Japan. Field investigation was carried out to estimate the in-situ characteristics of volcanic material. It was found that the soil was highly weathered, having low dry density and high moisture content. Laboratory examination included a series of triaxial compression tests which were performed to evaluate the dynamic properties of volcanic soil. Results of undrained cyclic loading tests indicated that the material had a high potential for generation of excess pore-water pressures, which could lead to a ...


Improved Methodology For Estimating Seismic Coefficients For The Pseudo-Static Stability Analysis Of Earth Dams, Achilleas G. Papadimitriou, Konstantinos I. Andrianopoulos, George D. Bouckovalas, Kostas Anastasopoulos 2010 University of Thessaly, Greece

Improved Methodology For Estimating Seismic Coefficients For The Pseudo-Static Stability Analysis Of Earth Dams, Achilleas G. Papadimitriou, Konstantinos I. Andrianopoulos, George D. Bouckovalas, Kostas Anastasopoulos

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

This paper presents an improved methodology for estimating seismic coefficients for the pseudo-static stability analysis of earth dams, which is based on a statistical analysis of input data and results for 112 potential failure surfaces, as estimated from 28 two dimensional seismic response analyses for eight (8) different zoned earth dams and high embankments. The new methodology employs design diagrams and equations and estimates the maximum and the effective seismic coefficients as a function of: (a) the peak ground acceleration at the free-field surface of the foundation soil, (b) the predominant period of the seismic excitation, (c) the eigenperiod of ...


Incorporation Of The Spatial Correlation Of Arias Intensity Within Earthquake Loss Estimation, Roxane Foulser-Piggott, Peter J. Stafford 2010 Imperial College London, U.K.

Incorporation Of The Spatial Correlation Of Arias Intensity Within Earthquake Loss Estimation, Roxane Foulser-Piggott, Peter J. Stafford

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Arias Intensity (Ia) has been identified as an efficient intensity measure for the purpose of estimating the likelihood and extent of landslides. This efficiency implies that Arias intensity may logically be used within earthquake loss estimation applications in order to ultimately estimate the damage to spatially-distributed systems or portfolios. In order to estimate the effects of ground motions on such spatially-distributed systems it is important to take into account the spatial correlation of the intensity measure. However, existing landslide loss-estimation models, which use Ia as an input, do not take this aspect of the ground motion into account. Due ...


Landslide Hazard Mapping And Assessment In Himalayas, A. K. Pachauri 2010 Indian Institute of Technology Roorkee, India

Landslide Hazard Mapping And Assessment In Himalayas, A. K. Pachauri

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Himalayas offer a good opportunity to study landslides in hard terrains. The region is a well established seismic region of Asia where earthquakes are common occurrence. The on going plate motion and its collision with Asian plate is the main triggering factor for landslides, but there are geological factors that make the slopes susceptible for landslides to be triggered during rains. The Yatra routes of Char Dham the four pilgrimage centers where millions of Hindus go each year for salvation and heaven abode have to face road blocks each rainy season. The border road organization the pioneer organization looking after ...


Nonlinear Time-Domain Analysis Of A Sliding Block On A Plane, Mohamed G. Arab, Edward Kavazanjian Jr., Neven Matasovic 2010 Arizona State University, Tempe, AZ

Nonlinear Time-Domain Analysis Of A Sliding Block On A Plane, Mohamed G. Arab, Edward Kavazanjian Jr., Neven Matasovic

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

A time domain finite difference numerical model of a sliding rigid block on a plane is developed using a simple elastic-perfectly plas-tic Mohr-Coulomb interface model. The model is shown to accurately predict the slip-stick and slip-slip behavior deduced from an analytical solution for behavior of a sliding block on a horizontal plane and the results of physical model tests of a block on both hori-zontal and inclined planes subject to harmonic and non-uniform excitation provided the appropriate interface strength is employed. Back analyses of the physical model tests show that for some geosynthetic interfaces, the interface shear strength depends upon ...


Numerical Analysis Of Failure Of Rudramatha Dam Section During 26Th January, 2001, Bhuj Earthquake, Amit Srivastava, G. L. Sivakumar Babu 2010 Indian Institute of Science, India

Numerical Analysis Of Failure Of Rudramatha Dam Section During 26Th January, 2001, Bhuj Earthquake, Amit Srivastava, G. L. Sivakumar Babu

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

On 26th January, 2001, the Kachchh region of Gujarat, India faced devastating earthquake of magnitude 7.6 (Mw) popularly known as “Bhuj” earthquake. Various man made facilities including earthen dams faced varying level of damages during the earthquake and one of the major causes of failure is attributed to wide spread liquefaction of foundation soil. In the present study, a typical Rudramata dam sections located in the Kachchh region is considered for the failure analysis using fully coupled nonlinear dynamic numerical code FLAC 5.0 with pore pressure generation capabilities under dynamic loadings. The analysis is performed using the ...


Numerical Modelling Of Earthquake-Induced Rock Landslides: The 1783 Scilla Case-History (Southern Italy), Francesca Bozzano, Salvatore Martino, Eliana Esposito, Alfredo Montagna, Luca Lenti, Antonella Paciello, Sabina Porfido 2010 University of Rome “Sapienza”, Italy

Numerical Modelling Of Earthquake-Induced Rock Landslides: The 1783 Scilla Case-History (Southern Italy), Francesca Bozzano, Salvatore Martino, Eliana Esposito, Alfredo Montagna, Luca Lenti, Antonella Paciello, Sabina Porfido

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

The coastal M. Pacì rock-avalanche was triggered by the 6th February 1783 earthquake near the village of Scilla (southern Calabria) and involved a subaerial volume of about 5·106 m3. This landslide produced a tsunami wave responsible for more than 1500 human life losses near Marina Grande beach. A geological survey and a geomechanical characterization of both the intact rock and the jointed rock mass outcropping in the landslide slope were carried out to obtain an engineering-geology model of the landslide according to an equivalent-continuum approach. Dynamic numerical modelling by FDM code FLAC 6.0 was performed to ...


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