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Articles 13531 - 13560 of 21751
Full-Text Articles in Engineering
Geotechnical Characterization Of Success Dam For A Dam Safety Earthquake Engineering Evaluation, Matthew G. Allen, John S. Nickell, Steve G. Sherer
Geotechnical Characterization Of Success Dam For A Dam Safety Earthquake Engineering Evaluation, Matthew G. Allen, John S. Nickell, Steve G. Sherer
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Success Dam, primarily a flood control and water conservation structure owned and operated by the US Army Corps of Engineers, lies in Seismic Zone 3. During construction of the dam, the impervious core trench was excavated to either weathered bedrock or older alluvium. However, the pervious outer zones of the embankment were constructed on existing in-situ materials, including recent alluvium, that were only minimally prepared. In 1992, the Corps of Engineers concluded that the state-of-practice allowed for a better understanding of the seismic response of the alluvial soils than was previously available, and a study to update the seismic stability …
Analysis Of Some Downhole Acceleration Records From "Central De Abasto Oficinas" Site At Mexico City, Hernán Martínez-Carvajal, Víctor M. Taboada-Urtuzuástegui, Miguel P. Romo
Analysis Of Some Downhole Acceleration Records From "Central De Abasto Oficinas" Site At Mexico City, Hernán Martínez-Carvajal, Víctor M. Taboada-Urtuzuástegui, Miguel P. Romo
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The surface and downhole accelerations records of “Central de Abasto Oficinas (CAO)” array at Mexico City, have been analyzed to determine the soil stiffness as a function of shear strain amplitude. The 09/10/95 seismic event (NS component) has been used for this purpose. The shear stress-strain histories have been evaluated directly from the field downhole acceleration records, employing a technique of system identification, and used to obtain the variation of shear modulus with shear strain amplitude. A shear-beam model, calibrated by the identified properties, is found to represent the site dynamic response characteristics. The results have been compared with values …
Attenuation Of Peak Ground Acceleration With Distance Of The June 15, 1999, Tehuacán, México, Earthquake, Rudolfo B. Sancio, J. M. Mayoral, R. E. S. Moss, J. M. Pestana, R. B. Seed, J. D. Bray
Attenuation Of Peak Ground Acceleration With Distance Of The June 15, 1999, Tehuacán, México, Earthquake, Rudolfo B. Sancio, J. M. Mayoral, R. E. S. Moss, J. M. Pestana, R. B. Seed, J. D. Bray
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
A seismic event of moment magnitude 7.0 struck the central region of Mexico on June 15, 1999 at 15:41 hrs (local time) between the states of Puebla and Oaxaca. The epicenter of the earthquake was located approximately 20 km to the south-southeast of the town of Tehuacán, Puebla and 55 km to the northeast of Huajuapan de León, Oaxaca. A reconnaissance team consisting of a group of researchers from the University of California at Berkeley (UCB) and the Autonomous University of Mexico (UNAM) visited the area and gathered some preliminary information on the geotechnical aspects of this earthquake. This paper …
Numerical Analysis Of Saturated Sand Under Dynamic Loads, Jae-Soon Choi, Inn-Joon Park, Soo-Il Kim
Numerical Analysis Of Saturated Sand Under Dynamic Loads, Jae-Soon Choi, Inn-Joon Park, Soo-Il Kim
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
In this study, the behavior of reclaimed soils including the effects of excess pore water pressure and the loss of strength under dynamic loads or earthquakes are investigated and simulated. The constitutive model based on the disturbed state concept (DSC) is introduced and DSC-DYN2D program is utilized in a numerical analysis. In the laboratory test, quasi-static and cyclic triaxial tests were carried out to determine parameters for the numerical analysis. Field tests were executed in Inchon International Airport with a 10 tons hydraulic hammer. In the field test, the data of dynamic loads and excess pore water pressure were measured …
Non-Linear Modeling Of Dip-Slip Faults Using Applied Element Method, Pradeep Kumar Ramancharla, Kimiro Meguro
Non-Linear Modeling Of Dip-Slip Faults Using Applied Element Method, Pradeep Kumar Ramancharla, Kimiro Meguro
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
On observing the recent big earthquakes that have occurred in Turkey (M.7.4, 1999.8.17) and Taiwan (M.7.3, 1999.9.21), it is understood that the differential ground displacement is also responsible for the failure of structures. Now, it is understood that there is a need to channelize the research interests to study the failure propagating mechanism through the soil deposit. Numerous researchers have attempted to study this phenomenon through, experiments for understanding the effects of seismic fault mechanism and soil deposit parameters on surface deformation characteristics. However, from the widespread damage caused by the recent events, it is now clear that the earthquakes …
Liquefaction Studies On Guaratuba Bay Erosion, Arinos Xavier Tavares
Liquefaction Studies On Guaratuba Bay Erosion, Arinos Xavier Tavares
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The paper presents the studies conducted to explain the erosion process which occurred at the Guaratuba bay coast located in the South of Brazil [Tavares, 1989]. The subsoil in the area is composed mainly of be clean sand. The erosion occurred as a result of the liquefaction of the sandy subsoil and is described in the text. Several buildings, including the City Hall, and some streets near the affected area were sunk into the subsoil. The phenomenon took place on the 23rd of September of 1968. In the years of 1998, 1999 to March, 2000, new studies were performed to …
Focal Mechanism Analyses Of The 1993, 1995 Northern Red Sea Sequences Activity, Abdulaziz A. S. Fayez, Nassir S. Al-Arifi
Focal Mechanism Analyses Of The 1993, 1995 Northern Red Sea Sequences Activity, Abdulaziz A. S. Fayez, Nassir S. Al-Arifi
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
On August 3rd, 1993, a sequence of earthquakes began in the central part of the Gulf of Aqaba, northern Red Sea at the Aragonese Deep. The largest event (MD = 5.5) on August 3rd had an origin time of 12:42:43.22 GMT, a latitude of 28.628° N and longitude 34.644° E. This event was followed by more than 15000 events greater than 2 magnitude with some felt earthquakes. On the same spot, another sequence of earthquakes began late 1995. The largest event (MD = 5.9) on November 22 had an origin time of 04:15:12.30 GMT, a latitude of 28.8° …
General Report — Session 2: Wave Propagation, Engineering Vibrations And Solutions, Vibrations Of Machine Foundations, Blast, Traffic And Construction Vibrations, Vibration Absorption, M. Hesham El Naggar, D. K. Baidya, Dong-Soo Kim, George M. S. Manyando, Nii K. Allotey
General Report — Session 2: Wave Propagation, Engineering Vibrations And Solutions, Vibrations Of Machine Foundations, Blast, Traffic And Construction Vibrations, Vibration Absorption, M. Hesham El Naggar, D. K. Baidya, Dong-Soo Kim, George M. S. Manyando, Nii K. Allotey
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
General Report — Session 4: Soil Amplification; Liquefaction And Ground Failures; Seismic Studies Of Loma Prieta, Northridge, Kobe, And Other Recent Earthquakes; Spatial Liquefaction, Vlad Perlea, J. Ludwig Figueroa, J. Scott Ellington, Anil Misra, S. M. Mir Mohammad Hosseini, Susumu Yasuda
General Report — Session 4: Soil Amplification; Liquefaction And Ground Failures; Seismic Studies Of Loma Prieta, Northridge, Kobe, And Other Recent Earthquakes; Spatial Liquefaction, Vlad Perlea, J. Ludwig Figueroa, J. Scott Ellington, Anil Misra, S. M. Mir Mohammad Hosseini, Susumu Yasuda
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
The 1999 Athens (Greece) Earthquake: Energy And Duration- Related Response Spectral Characteristics Of Different Site Conditions, P. K. Koliopoulos, B. N. Margaris
The 1999 Athens (Greece) Earthquake: Energy And Duration- Related Response Spectral Characteristics Of Different Site Conditions, P. K. Koliopoulos, B. N. Margaris
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
An earthquake of September 7, 1999 (M5.9) has occurred in the Athens (Attika) area and was felt in almost all central Greece. The earthquake caused a lot of damage and extensive loss of life. The most damaged region is located within a distance of 10 km from the epicenter and numerous modem buildings and industrial facilities collapsed. The accelerograms, which have been recorded during the main event, are processed and compared with the empirical predictive relations proposed for Greece. For each record, the bracketed and significant duration as well as various energy-related measures are estimated. The correlation of these measures …
General Report — Session 3: Engineering Seismology And Local Site Effects, Ronald C. Chaney, Dennis Hiltunen, Jonathan Stewart, Madan Karkee, Vladimir Sokolov
General Report — Session 3: Engineering Seismology And Local Site Effects, Ronald C. Chaney, Dennis Hiltunen, Jonathan Stewart, Madan Karkee, Vladimir Sokolov
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
General Report — Session 8: Seismic Analysis And Retrofit Of Foundations Of Bridges And Other Sub-Structures, Seismic Retrofit Projects And Procedures In California, Ronaldo Luna, Genda Chen
General Report — Session 8: Seismic Analysis And Retrofit Of Foundations Of Bridges And Other Sub-Structures, Seismic Retrofit Projects And Procedures In California, Ronaldo Luna, Genda Chen
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
General Report — Session 10: Case Histories Of Geotechnical Earthquake Engineering, Failures, And Geotechnical Analysis Of Recent Earthquakes, Jonathan D. Bray, Marshall Lew, Yung-Show Fang, H. W. Yang, Masayuki Hyodo, Shigeru Tani
General Report — Session 10: Case Histories Of Geotechnical Earthquake Engineering, Failures, And Geotechnical Analysis Of Recent Earthquakes, Jonathan D. Bray, Marshall Lew, Yung-Show Fang, H. W. Yang, Masayuki Hyodo, Shigeru Tani
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Deep Foundations In Liquefiable Soils: Case Histories, Centrifuge Tests And Methods Of Analysis, W. D. Liam Finn, T. Thavaraj
Deep Foundations In Liquefiable Soils: Case Histories, Centrifuge Tests And Methods Of Analysis, W. D. Liam Finn, T. Thavaraj
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper describes the performance of pile foundations in liquefied soils. Two different aspects of pile response are considered, seismic response to earthquake shaking and response to lateral spreading when the liquefied ground is sloping. The case histories show that piles can be designed economically to resist large lateral displacements and that most of the reported examples of damage from lateral spreading involve weak piles with little reinforcement which were installed to control vertical settlements and were not designed to be moment resistant. A quasi-3-D continuum method is presented for dynamic effective stress response analysis of pile groups in liquefiable …
Liquefaction Assessment And Lateral Spreading In Nantou, Taiwan, P. S. Lin, C. W. Chang, C. C. Hseih, S. Y. Lai, S. Y. Lin
Liquefaction Assessment And Lateral Spreading In Nantou, Taiwan, P. S. Lin, C. W. Chang, C. C. Hseih, S. Y. Lai, S. Y. Lin
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
On September 21, 1999, Taiwan was struck by an earthquake, called Chi-Chi earthquake, one of the largest in 100 years. The epicenter was located 12.5 km west of the Sun Moon Lake (Northern Latitude 23.85°) Eastern Longitude 120.78°), with focal depth of 8 km, and magnitude of Mw=7.6 (USGS). This earthquake caused heavy casualties and severe property damages around central Taiwan. It was found that this earthquake resulted in sand boiling, differential settlement on the ground and lateral spreading around part of the Maolou River bank in Nantou City. Field investigation, geological exploration and in situ tests, which …
Seismic Design Of Mixed And Hazardous Waste Landfills, Edward Kavazanjian Jr., Neven Matasovic
Seismic Design Of Mixed And Hazardous Waste Landfills, Edward Kavazanjian Jr., Neven Matasovic
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Due to the absence of federal criteria, seismic design and performance criteria for mixed and hazardous waste landfills are generally developed on a project-specific basis, supplemented by state and project-specific standards. In developing project-specific criteria, the federal Subtitle D standards for seismic design of municipal solid waste landfills are often used as a minimum standard for mixed and hazardous waste facilities. Seismic performance standards are also usually developed on a project-specific basis, employing either a “withstand without harmful discharge” or a “withstand without damage” performance standard, depending on the certainty of continuing aftercare. Quantitative criteria established to demonstrate compliance with …
Risk Analysis In Geotechnical And Earthquake Engineering, State-Of-The-Art Practice Of Embankment Dams, D. N. D. Hartford
Risk Analysis In Geotechnical And Earthquake Engineering, State-Of-The-Art Practice Of Embankment Dams, D. N. D. Hartford
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Despite a proliferation of papers on quantitative risk analysis for dams during the past twenty years, risk analysis has not found widespread application in dam safety practice. Recent experience suggests that, despite a great deal of enthusiasm in the 1990’s, the professional opinion concerning the usefulness of risk analysis in dam safety practice is almost as divided now as it was in the early 1980’s. This paper presents an account of the history and development of risk analysis ln dam safety practice in the field of geotechnical earthquake engineering since its inception in the early 1960’s to September 2000. Against …
Investigation Of Seismic Soil-Footing Interaction By Large Scale Tests And Analytical Models, Ezio Faccioli, Roberto Paolucci, Guillermo Vivero
Investigation Of Seismic Soil-Footing Interaction By Large Scale Tests And Analytical Models, Ezio Faccioli, Roberto Paolucci, Guillermo Vivero
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Recent experimental and analytical research on seismic behavior of shallow foundations is illustrated. The most significant results on the seismic bearing capacity of footings with pseudo-static approaches are reviewed first, including an analytical formula recently proposed for the new version of the “seismic” Eurocode 8. Afterwards, we present the salient experimental results of large-scale cyclic tests of a shallow foundation model (1m x 1m in plan) resting on a large volume of sand, with relative densities 45% and 85%, discussing them in detail. Under earthquake-like cyclic loading, with peak values close to the pseudo-static failure limit, significant permanent settlement and …
Review Of Soil And Topography Effects In The September 7, 1999 Athens (Greece) Earthquake, George D. Bouckovalas, George Kouretzis
Review Of Soil And Topography Effects In The September 7, 1999 Athens (Greece) Earthquake, George D. Bouckovalas, George Kouretzis
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The earthquake that hit Athens, Greece on September 7, 1999 was an unexpected disaster. It originated from a previously unknown seismotectonic structure, at about 18 km to the west of the historical center, and left behind 143 casualties, about 100,000 homeless and 100 totally collapsed buildings. On the other hand, it provided a number of reliable strong motion recordings and well-defined patterns of damage at sites with known geological and geotechnical conditions. Evaluation of this information shows that the very stiff soils of the Athens basin amplified seismic ground motion by an average of 40% compared to nearby outcropping soft …
General Report — Session 5: Stability And Displacement Performance Of Slopes, Landfills, And Earth Dams Under Earthquakes, Donald G. Anderson, Allen M. Yourman, Hormoz Modaressi, Azm S. Al-Homoud, Robert C. Lo
General Report — Session 5: Stability And Displacement Performance Of Slopes, Landfills, And Earth Dams Under Earthquakes, Donald G. Anderson, Allen M. Yourman, Hormoz Modaressi, Azm S. Al-Homoud, Robert C. Lo
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
General Report — Session 11: Seismic Zonation And Microzonation, Earthquake Risk Assessment, And Earthquake Risk Management, M. S. Power, G. Estrada, S. Zlatovic, L. Matesic, F. R. Bickner, C. Cardona, F. H. Swan
General Report — Session 11: Seismic Zonation And Microzonation, Earthquake Risk Assessment, And Earthquake Risk Management, M. S. Power, G. Estrada, S. Zlatovic, L. Matesic, F. R. Bickner, C. Cardona, F. H. Swan
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Disclaimer, Shamsher Prakash
Disclaimer, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Steering Committee, Shamsher Prakash
Steering Committee, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Organizing Committee, Shamsher Prakash
Organizing Committee, Shamsher Prakash
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Recent Studies On Seismic Centrifuge Modeling Of Liquefaction And Its Effects On Deep Foundations, Ricardo Dobry, Tarek Abdoun
Recent Studies On Seismic Centrifuge Modeling Of Liquefaction And Its Effects On Deep Foundations, Ricardo Dobry, Tarek Abdoun
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The effects of liquefaction on deep foundations are very damaging and costly, and they keep recurring in many earthquakes. The first part of the paper reviews the field experience of deep foundations affected by liquefaction during earthquakes in the last few decades, as well as the main lessons learned. The second part of the paper presents results of physical modeling of deep foundations in the presence of liquefaction conducted mostly in the U.S. and Japan in the 1990’s, with emphasis on the work done by the authors and others at the 100 g-ton RPI centrifuge. Centrifuge models of instrumented single …
Dynamic Soil Properties, Seismic Downhole Arrays And Applications In Practice, Ahmed Elgamal, Tao Lai, Zhaohui Yang, Liangcai He
Dynamic Soil Properties, Seismic Downhole Arrays And Applications In Practice, Ahmed Elgamal, Tao Lai, Zhaohui Yang, Liangcai He
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Downhole arrays are deployed worldwide to record seismic ground response in near-surface strata. The information supplied by these arrays is increasingly becoming the basis for verification, and for development and calibration of predictive tools and design procedures. Advances __ in sensors and information technologies will further expedite this learning process, opening the door for worldwide sharing and collaboration. In this paper, the following topics are addressed: i) A summary of downhole array installations and data in the U.S. and in the Taiwan, Hualien and Lotung sites, ii) An overview of related current research efforts worldwide, iii) Downhole array system identification …
Photographic Ensemble - Soap Speakers And Special Presentations, Multiple Participants
Photographic Ensemble - Soap Speakers And Special Presentations, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Photographic Ensemble - Finn Symposium, Multiple Participants
Photographic Ensemble - Finn Symposium, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Photographic Ensemble - Speakers And Participants From Around The World, Multiple Participants
Photographic Ensemble - Speakers And Participants From Around The World, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Photographic Ensemble - Short Course, Multiple Participants
Photographic Ensemble - Short Course, Multiple Participants
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.