Past Proceedings: Sixth International Conference On Case Histories In Geotechnical Engineering (2008),
2010
Missouri University of Science and Technology
Past Proceedings: Sixth International Conference On Case Histories In Geotechnical Engineering (2008), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Second International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics (1991),
2010
Missouri University of Science and Technology
Past Proceedings: Second International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics (1991), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984),
2010
Missouri University of Science and Technology
Past Proceedings: First International Conference On Case Histories In Geotechnical Engineering (1984), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988),
2010
Missouri University of Science and Technology
Past Proceedings: Second International Conference On Case Histories In Geotechnical Engineering (1988), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Past Proceedings: Fifth International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics (2010),
2010
Missouri University of Science and Technology
Past Proceedings: Fifth International Conference On Recent Advances In Geotechnical Earthquake Engineering And Soil Dynamics (2010), Multiple Authors
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Effective Stress Based Numerical Assessment Of Liquefaction-Induced Landslide At Degirmendere Cape, Izmit Bay During Kocaeli (Izmit)-Turkey Earthquake,
2010
Middle East Technical University, Turkey
Effective Stress Based Numerical Assessment Of Liquefaction-Induced Landslide At Degirmendere Cape, Izmit Bay During Kocaeli (Izmit)-Turkey Earthquake, Sevinc Unsal Oral, Kemal Önder Çetin
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper presents the numerical assessment of seismically-induced slope instability observed at Degirmendere Cape, Izmit Bay during Kocaeli (Izmit)-Turkey earthquake. As is evident from the name of the site, Degirmendere Cape site is located at the north of Degirmendere, on a small intrusion into the Bay of Izmit. At Degirmendere Cape, there existed a municipality owned hotel and recreational areas. During the earthquake following slumping of the fill material, the site was unindated. All the recreational facilities as well as the municipality hotel were lost to Marmara Sea with its residents. Failure mechanism was attributed to fault rupture/seismically induced slope …
General Report — Session 3,
2010
University of Michigan, Ann Arbor, MI
General Report — Session 3, Dimitrios Zekkos, Adimoolam Boominathan, Adda Athanasopoulos-Zekkos
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
General Report — Session 4,
2010
Missouri University of Science and Technology
General Report — Session 4, Ronaldo Luna, Panos Dakoulas, Wei Zheng, K. Önder Çetin, Mary Perlea, Gordon Tung-Chin Kung, Usama El Shamy, Simone Barani
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Development Of Database Of Cyclic Soil Properties From 94 Tests On 47 Soils,
2010
University of Rijeka, Croatia
Development Of Database Of Cyclic Soil Properties From 94 Tests On 47 Soils, Leo Matesic, Chu-Chung Hsu, Marco D'Elia, Mladen Vucetic
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Cyclic properties of 47 soils were tested in several investigations between 1994 and 2004 in the standard Norwegian Geotechnical Institute (NGI) direct simple shear (DSS) device and an NGI-type dual-specimen DSS (DSDSS) device for small strain testing. In each investigation many cycles of different amplitude, c, and frequency, f, were applied at different levels of vertical stress, v, and overconsolidation ratio, OCR. In DSDSS device many consecutive series of different small c=0.0003-0.01% were applied on the same specimens without changing their structure, because at such small c cyclic shearing is nondestructive. Consequently, the vast amounts of small-strain data were generated. …
Resonant-Frequency Method Of Soil Damping Characteristics Determination,
2010
Gersevanov NIIOSP, Russia
Resonant-Frequency Method Of Soil Damping Characteristics Determination, Leonid Stavnitser, Galina Nikitaeva
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The resonant-frequency method of determining the absorption factors characterizing the soil damping properties has been developed for implementation of software programs on computation of dynamic interaction of foundation based constructions. This method is based on processing of amplitude-frequency characteristics of soil samples obtained from the vibro-dynamical tests carried out on the specially constructed installation equipped with the vibro-recording instruments. A set of experiments was performed with sandy and clayey soils at difference humidity, density and stratification depth, based on investigation of forced oscillations of these samples and further processing of the resonance curves within the frames of presentation of the …
Aggravation Of The Peak Seismic Acceleration In The Vicinity Of 2d Hills, Canyons And Slopes,
2010
University of Thessaly, Greece
Aggravation Of The Peak Seismic Acceleration In The Vicinity Of 2d Hills, Canyons And Slopes, Achilleas G. Papadimitriou, Yannis Chaloulos
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper studies the topographic aggravation of the peak seismic acceleration in the horizontal and vertical directions for various cases of 2D uniform surface geometries: hills, canyons and slopes. The study is based on a large number of 2D wave propagation analyses for uniform soil conditions performed with the finite-difference method. All analyses were visco-elastic, assumed vertically impinging harmonic SV waves and studied parametrically the effects of the slope inclination i, the dimensionless height H/λ of the topographic feature (where H is the height and λ is the predominant S wavelength) and of the width B of the canyon base …
Residual Shear Strengths Of Cohesionless Soils From Energy Approach,
2010
Indian Institute of Technology, India
Residual Shear Strengths Of Cohesionless Soils From Energy Approach, Raghvendra Singh, Debasis Roy
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The residual shear strength of the non plastic soils are generally estimated from the correlations between residual shear strength estimated from the laboratory tests or from the back analyses of post failure geometries of case histories distressed during static or seismic loading and penetration resistances. The post failure shear strength of large deformed structures like debris flow, mud flow and avalanches in which the post deformed soil mass gain large distance after the failure, depends on the strain rate behavior of shear (viscous) resistance, frictional resistance, inertial effect, three dimensional effect of geometry, flexibility of failed material and void redistribution …
The Effect Of Earthquake Record Scaling Technique On Embankment Dam Response,
2010
BGC Engineering Inc., Canada
The Effect Of Earthquake Record Scaling Technique On Embankment Dam Response, Hamid Karimian, Somasundaram Sriskandakumar, Adrian Wightman, Li Yan
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The state of the practice in dynamic analysis of structures includes the selection of earthquake records based on the mean (or modal) magnitude and distance of the design earthquake, and linearly scaling of the selected records to the target spectral acceleration at the period of significance, or matching the selected records to the uniform hazard response spectrum (UHRS). A method is presented by Baker and Cornell (2005, 2006a, and 2006b) to develop the conditional mean response spectrum of a ground motion given a target value of the spectral acceleration at the period (or period range) of significance. The shape of …
Soil-Structure Interaction Analysis For Bridge Caisson Foundation,
2010
Earth Mechanics Inc., Oakland, CA
Soil-Structure Interaction Analysis For Bridge Caisson Foundation, Zhao Cheng, Hubert Law, Yang Jiang
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In the practical seismic analysis for the project of South Park Bridge Replacement, the caisson foundations are modeled as Winkler springs in the global bridge model. The global bridge model is then excited by depth-varying ground motions acting along the height of the caisson. The foundation model would entail Winkler springs distributed over the surfaces of caisson to represent the soil continuum underlying the foundation and passive soil pressure acting on the sides. The soil springs are nonlinear for consideration of yielding of localized soil. In addition, gapping elements can also be implemented in series with the soil springs to …
Wave-Induced Strength Weakening Of Soft Clay Below A Prefabricated Caisson Dike,
2010
Tianjing University, China
Wave-Induced Strength Weakening Of Soft Clay Below A Prefabricated Caisson Dike, Shuwang Yan, Jian Chu, Qijin Fan
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A case history of constructing offshore guide dikes on soft clay is presented in this paper. The guide dikes were constructed near the Shanghai Port, China, for deepening of navigation channel along the Yangtze Estuary. The guide dikes were designed as gravity retaining structures using prefabricated, semi-circular shaped concrete caissons. Some sections of the guide dikes were installed on a thick layer of soft soils. During the construction, the caissons in one section failed under a heavy storm. The causes of failure were investigated by running dynamic triaxial tests on undisturbed soil samples taken from the construction site, associated with …
The Variable Damping Concept In Pile Capacity Prediction By Wave Equation Analysis,
2010
VIBRACONSULT, Cleveland, OH
The Variable Damping Concept In Pile Capacity Prediction By Wave Equation Analysis, Mark R. Svinkin
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A wave equation method is applied for pre-driving analysis of driveability calculations and capacity prediction of driven piles. For the majority of piles, there are substantial differences between predicting results and pile capacities determined from static or dynamic tests. Correct calculations of the dynamic resistance are important for accurate prediction of the pile capacity. The dynamic resistance depends on the pile velocity and the damping coefficient, but both of them cannot reflect time-dependent changes of the pile-soil system after the end of driving. Variation of the pile-soil system after pile installation can be taken into account with a variable damping …
A Comparison Of Local Site Conditions With Passive And Active Surface Wave Methods,
2010
Middle East Technical University (METU), Turkey
A Comparison Of Local Site Conditions With Passive And Active Surface Wave Methods, Arif Mert Eker, Haluk Akgün, Mustafa Kerem Koçkar
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This study encompasses dynamic soil characterization and seismic hazard mapping of the Plio-Quaternary and especially Quaternary alluvial sediments of the Çubuk district and its close vicinity that is situated towards the north of Ankara. The project site is located at a region which has a potential of being seriously affected by a possible earthquake occurring along the Çubuk Fault Zone that is thought to be a continuation of the Dodurga Fault Zone and a sub-fault belt of the North Anatolian Fault System that is one of the most prominent fault systems in Turkey with significant earthquake potential. Non-invasive seismic methods …
Effect Of Degree Of Weathering On Dynamic Properties Of Weathered Granite Soils,
2010
Korea Electric Power Corporation, Seoul, Korea
Effect Of Degree Of Weathering On Dynamic Properties Of Weathered Granite Soils, Woong Jong Park
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The strength-deformation characteristics of weathered granite soils are determined by the characteristic of bedrock before the weathering and weathering environment. Generally, the degree of weathering is changes with depth and affects the dynamic properties of soil. But there are very few studies of the effect of degree of weathering on dynamic properties of soils in Korea. In this study, dynamic tests were performed with resonant column after preparing the specimens which were remolded with disturbed soils, and the effect of degree of weathering on dynamic properties, such as shear modulus, damping ratio is considered. In addition, the relationships among shear …
Determination Of Small Strain Modulus And Degradation For In-Situ Weathered Rock And Old Alluvium Deposits,
2010
Ove Arup & Partners HK Ltd, Hong Kong
Determination Of Small Strain Modulus And Degradation For In-Situ Weathered Rock And Old Alluvium Deposits, Erin Leung, Jack Pappin, Raymond Koo
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The small strain shear modulus (G0) and the degradation of shear modulus (G/G0) with increasing magnitude of shear strain are important soil properties required for the evaluation of site response due to earthquake effects. While these properties are well established for geologically recent alluvial sand and clay materials, published data on the properties of materials derived from in-situ rock weathering and ancient alluvial deposits are limited. This paper presents the results of laboratory testing on completely decomposed granite and tuff in Hong Kong, and weathered Jurong Siltstone and Old Alluvium in Singapore. The small strain shear …
A New Method For Evaluating Spatial Variability Of Soil Strains Developed During Earthquakes Based On Electrical Resistivity Concepts Using Green’S Function,
2010
AMEC Geomatrix, Inc., Oakland, CA
A New Method For Evaluating Spatial Variability Of Soil Strains Developed During Earthquakes Based On Electrical Resistivity Concepts Using Green’S Function, Zhihua Li
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A new method for evaluating spatial variability of soil strains during earthquakes is developed. The idea is based on electrical resisitivity concepts. By solving the classic Maxwell’s equations applying Green’s function for the boundary conditions, we obtained a closed form solution relating the electric potential measurements to the soil’s displacements during earthquakes. The displacement information can be further used to obtain soil strains. In centrifuge models, the displacement measurements using an electrode switching system have been demonstrated to have spatial and temporal resolutions of 1 mm and 1 ms. Based on the high resolution of the displacement that is obtainable, …
