Open Access. Powered by Scholars. Published by Universities.®

Civil and Environmental Engineering Commons™

Open Access. Powered by Scholars. Published by Universities.®

Missouri University of Science and Technology

Discipline
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 4171 - 4200 of 7866

Full-Text Articles in Civil and Environmental Engineering

Dynamic Model Tests On Gravity Retaining Walls With Various Surcharge Conditions, Ernesto Cascone, Agatino Simone Lo Grasso, Michele Maugeri Mar 2001

Dynamic Model Tests On Gravity Retaining Walls With Various Surcharge Conditions, Ernesto Cascone, Agatino Simone Lo Grasso, Michele Maugeri

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

Seismic design of retaining walls is traditionally based on the Mononobe-Okabe method of analysis. In recent years a number of theoretical analyses have been presented to predict the seismic behaviour of gravity retaining walls. In this paper some shaking table tests performed on a small prototype of gravity wall retaining dry sand are described and the experimental results are presented with the aim to provide, though qualitatively, an insight into some important aspects of the dynamic behaviour of retaining structures resting on rigid foundation soil. The M-O theory do not consider the particular boundary condition that in the practical design …

Go to article

Using Discontinuous Deformation Analysis To Investigate The Dynamic Stability Of Tunnels In Jointed Rocks Under Earthquake Loading, Reza Naderi, Nader Hataf, Arsalan Ghahramani Mar 2001

Using Discontinuous Deformation Analysis To Investigate The Dynamic Stability Of Tunnels In Jointed Rocks Under Earthquake Loading, Reza Naderi, Nader Hataf, Arsalan Ghahramani

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

Tunneling is one of the most important problems in rock mechanics that many numerical methods try to investigate. In general, static analysis methods are mainly used to investigate the stability of tunnels, which are not safe in dynamic conditions. This paper is illustrating the use of Discontinuous Deformation Analysis (DDA) in analyzing the stability of tunnels in jointed rocks under earthquake loading. To improve the capability of original DDA method to meet the requirements for analysis of rock tunnels under dynamic loading and time dependent (time history) loading, damping and energy loss have been added to the program. Some numerical …

Go to article

Analytical Study Of The Nikawa Landslide, Dimitrious Loukidis, Sang-Ho Lee, Quanghee Yi, Philippe L. Bourdeau Mar 2001

Analytical Study Of The Nikawa Landslide, Dimitrious Loukidis, Sang-Ho Lee, Quanghee Yi, Philippe L. Bourdeau

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

One of the most severe landslides triggered by the 1995 Hyogoken-Nambu earthquake was the Nikawa landslide. The seismic ground motion generated excessive pore pressure inside the portion of the slope mass that was below the water table. Data from standard penetration tests suggested that, in spite of the significant percentage of fines in the sand and its slight overconsolidation due to the fluctuation of the water table, the slope material had potential of liquefaction under seismic loading. The objective of the present study was to investigate the consistency between observations and the results of analysis methods for this slope failure. …

Go to article

Stability Analysis Of The Geosynthetic-Reinforced Modular Block Walls Damaged During The Chi-Chi Earthquake, Ching-Chuan Huang, Fumio Tatsuoka Mar 2001

Stability Analysis Of The Geosynthetic-Reinforced Modular Block Walls Damaged During The Chi-Chi Earthquake, Ching-Chuan Huang, Fumio Tatsuoka

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

Psuedo-static stability analysis based on “Coulomb’s one-wedge” and “two-wedge” methods was performed for two geosynthetic-reinforced modular block walls which were either collapsed or lightly damaged during the 1999 Taiwan Chi-Chi earthquake It was shown that two-wedge failure mechanism is a dominant one for the walls investigated. Difference in the seismic behavior of these walls was partially explained based on the psuedo-static analysis. It was also shown that seismic stability of the reinforced wall depends largely on the connection strength between the facing and the geogrid.

Go to article

Evaluation Of Seismic Safety Of A Large Caisson Structure, Tamotsu Matsui, Kazuhiro Oda, Ikuo Aoshima, Hiroshi Murakami, Akinori Nakahira, Choji Kuroda, Naoto Suzuki Mar 2001

Evaluation Of Seismic Safety Of A Large Caisson Structure, Tamotsu Matsui, Kazuhiro Oda, Ikuo Aoshima, Hiroshi Murakami, Akinori Nakahira, Choji Kuroda, Naoto Suzuki

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

Some centrifugal shaking tests were carried out to clarify the mechanism of seismic interaction between a large caisson foundation and soil layers. Based on the test data, two-dimensional seismic effective stress FE analysis was applied, followed by verifying its applicability. Also, to clarify the flexural and shear behavior of the caisson structure members to the ultimate state and to evaluate the flexural and shear resistance, some large-scale model failure tests of poorly reinforced concrete in caisson foundation were carried out. Based on these test results above-mentioned, seismic analyses of an existing large caisson foundation to ground motion in level 2 …

Go to article

Centrifuge Characterization And Numerical Modeling Of The Dynamic Properties Of Tire Shreds For Use As Bridge Abutment Backfill, Key Rosebrook, Dan Wilson, Boris Jeremic, Bruce Kutter, Amy Smith, Dana Humphrey, Stacey Patenaud Mar 2001

Centrifuge Characterization And Numerical Modeling Of The Dynamic Properties Of Tire Shreds For Use As Bridge Abutment Backfill, Key Rosebrook, Dan Wilson, Boris Jeremic, Bruce Kutter, Amy Smith, Dana Humphrey, Stacey Patenaud

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

Two model tests were performed on tire shred fills to document the dynamic elastic material properties of tire shreds using the large centrifuge at UC Davis. The tests were considered to be “element” tests of tire shred material properties, rather than the more typical centrifuge modeling of a site profile. As these were the first tests using tire shred material on the UC Davis centrifuge, new construction and instrumentation techniques were developed. New geophysical wave sources for use with tire shreds were developed to identify reasonable material properties to use in FEM analyses. In addition to the geophysical testing for …

Go to article

Seismic Design Of Pile Foundations In Southern Indiana, Dimitrios Loukidis, Rodrigo Salgado, Antionio Bobet Mar 2001

Seismic Design Of Pile Foundations In Southern Indiana, Dimitrios Loukidis, Rodrigo Salgado, Antionio Bobet

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

In this paper, we present an evaluation of the potential risk of earthquake-induced damage to pile foundations in Indiana. Piles are commonly used in foundations of bridge piers in the southern part of Indiana; the potential seismic sources in this region are the Wabash Valley Fault system and the New Madrid Seismic Zone. Based on in-situ test data for specific sites in southern Indiana, one-dimensional wave propagation analyses are performed. Additionally, the liquefaction potential is estimated based on the calculated acceleration profile. Data on real cases of pile damage due to seismic events are collected after an extensive literature survey. …

Go to article

Earthquake Resistance Of New Type Viaduct Structure, Eiji Wakita, Masayoshi Sato, Takashi Tazoh Mar 2001

Earthquake Resistance Of New Type Viaduct Structure, Eiji Wakita, Masayoshi Sato, Takashi Tazoh

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

An experiment and a numerical analysis were carried out in order to examine the earthquake resistance of a new type viaduct structure. The experiment was a dynamic centrifuge modeling which used the viaduct model of the rates 1/50 of a scale. The 3-dimensional finite element analysis was performed in order to confirm the results of the dynamic centrifuge modeling. At the results, new knowledge was obtained with regard to the viaduct structure.

Go to article

A Field Study And Dynamic Finite Element Analysis Of Railway Retaining Structures Damaged By The Hyogoken-Nambu Earthquake (1995), Yoshinori Nagayama, Tamotsu Matsui, Ikuo Yasukawa, Hiroshi Kasai Mar 2001

A Field Study And Dynamic Finite Element Analysis Of Railway Retaining Structures Damaged By The Hyogoken-Nambu Earthquake (1995), Yoshinori Nagayama, Tamotsu Matsui, Ikuo Yasukawa, Hiroshi Kasai

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

The seismic damage to embankments and retaining walls caused by the Hyogoken-nambu Earthquake (1995) was reviewed, rather focusing on railway structures. Nearly eight kilometers of damaged retaining structures were divided into five structural types, such as gravity-type walls, leaning-type walls, embankments, geo-textile-reinforced earth walls, and reinforced concrete walls, and into three categories of the damage, such as collapse, tilt, and crack. It was observed that the damage to gravity-type and leaning-type walls was greater than that to embankments, geo-textile-reinforced earth walls, and reinforced concrete walk, when they are lower than five meters. But some leaning-type walls higher than seven meters …

Go to article

Shaking Table Tests On Seismic Deformation Of Composite Breakwaters, Hideo Sekiguchi, Hayoung Kim, Katsutoshi Kita Mar 2001

Shaking Table Tests On Seismic Deformation Of Composite Breakwaters, Hideo Sekiguchi, Hayoung Kim, Katsutoshi Kita

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

A series of shaking table tests were conducted on composite breakwater systems under 30g centrifugal conditions. The emphasis was placed on investigating the mechanisms of seismic settlement of foundation ground, in particular of the contribution from the dispersion of mound rubble into the foundation soil. In-flight visual observation of the deformation process by a high-speed CCD camera showed the significance of cumulative vertical compression of foundation soils under cyclic loading. Pre- and post-shaking comparisons of weight of the rubble mound revealed that dispersion into the soil had occurred and contributed to caisson settlement.

Go to article

Shear Strength Reduction Due To Excess Pore Water Pressure, Awad Ali Al-Karni Mar 2001

Shear Strength Reduction Due To Excess Pore Water Pressure, Awad Ali Al-Karni

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

Earthquake shaking causes the pore water pressure inside the soil mass to increase rabidly within a short period of time as seconds. As a result, the shear strength of the soil could be reduced significantly. The reduction in the shear strength will increase gradually as the shaking continues due to the gradual increase in the buildup of the excess pore water pressure. At a certain level of shaking, the soil mass will liquefy and could be considered as a viscous fluid. In this paper, a mathematical expression of a reduction factor was derived to estimate the reduction in the shear …

Go to article

Centrifuge Modeling Of Pile-Supported Wharves For Seismic Hazards, Nason J. Mccullough, Scott M. Schlechter, Stephen E. Dickenson Mar 2001

Centrifuge Modeling Of Pile-Supported Wharves For Seismic Hazards, Nason J. Mccullough, Scott M. Schlechter, Stephen E. Dickenson

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

Recent earthquakes have highlighted many seismic hazard concerns for western U.S. ports. Port waterfront structures are commonly constructed utilizing pile-supported wharves in combination with rock dike structures retaining a hydraulically placed backfill. Seismic damage is generally attributed to weak soils that are often prevalent in the marine environment (e.g. liquefiable sands, sensitive cohesive soils). In response to past damage, many ports are instigating soil improvement strategies to eliminate or minimize potential occurrences of liquefaction and to increase the strength of cohesive soils. The design of a seismically resilient wharf requires an understanding of its performance during design level earthquakes. Due …

Go to article

Similarity Rule For Dynamic Model Tests Of Geotechnical Structures, Gao Lin Mar 2001

Similarity Rule For Dynamic Model Tests Of Geotechnical Structures, Gao Lin

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

Soils and rocks are characterized by their highly nonlinear behaviors. This makes it very difficult to ensure similarity between model and prototype for dynamic model tests of geotechnical structures. In reality, a great number of such tests were carried out qualitatively, and valuable information was missed. Based on fairly long time practice and experience of performing dynamic model tests, we get some new ideas to establish similarity relationships between model and real earth structures. It is noticed that during strongly inelastic shaking, peak crest acceleration of earth and rock-fill dams decreases with increasing base excitation, finally at near failure stage …

Go to article

Use Of Controlled Detonation Of Explosives For Liquefaction Testing, W. B. Gohl, J. A. Howie, C. E. Rea Mar 2001

Use Of Controlled Detonation Of Explosives For Liquefaction Testing, W. B. Gohl, J. A. Howie, C. E. Rea

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

A field liquefaction test was conducted in Delta, B.C., Canada. The target layer was a loose sandy silt between the 10 and 12 m depth. The test layer was instrumented with two triaxial accelerometers, dynamic and static pore pressure transducers, and Sondex tubes to measure vertical ground strain. An array of boreholes was drilled around the instrument cluster and charged with explosives. Delays were introduced to the detonation sequence in order to generate multiple blast pulses. The cyclic loading from the blasting generated a series of shear and compressive strain pulses. We consider that shear strain dominates residual pore pressure …

Go to article

Dynamic Centrifuge Tests On Sea Revetment With Multi-Anchors, M. Kitazume, Y. Kikuchi, K. Masuda, H. Hashizume Mar 2001

Dynamic Centrifuge Tests On Sea Revetment With Multi-Anchors, M. Kitazume, Y. Kikuchi, K. Masuda, H. Hashizume

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

In the construction of sea revetment, composite type of revetment has been frequently used in Japan, in which huge sized concrete caissons are placed on gravel mound to sustain earth pressure induced by sea reclamation. There are several case records of serious disaster with large displacement of the caisson in huge earthquake. This requires research efforts to find a new type of sea revetment having better static and dynamic performances. A sort of tieback caisson is an idea for the requirement, in which a concrete caisson with relatively small width is reinforced by many anchors. Authors started to study the …

Go to article

Evaluation Of The Shear Modulus In Models For Shallow-Foundation Dynamics Within The Elastic Domain, Jean-Louis Chazelas Mar 2001

Evaluation Of The Shear Modulus In Models For Shallow-Foundation Dynamics Within The Elastic Domain, Jean-Louis Chazelas

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

The aim of this presentation is to examine the relationship of the equivalent homogeneous shear moduli used in impedance models with stresses under the footing, through the use of scaled models in the centrifuge and an impact loading. The analysis of time and frequency vertical responses of footings reveals that reflections on the boundaries are negligible. The frequency response of a series of circular and square footings is shown to be rather easily-fitted with Wolf’s models for foundations on an infinite half-space with reasonably consistent parameters for masses, damping and shear moduli. The damping is nearly constant, yet significantly lower …

Go to article

The Observed Building Damage Associated With Fault Movement In 1999 Chi-Chi (Taiwan) Earthquake, H. W. Yang, S. M. Lin, Daniel Chu Mar 2001

The Observed Building Damage Associated With Fault Movement In 1999 Chi-Chi (Taiwan) Earthquake, H. W. Yang, S. M. Lin, Daniel Chu

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

The Chi-Chi earthquake caused severe damage of many buildings primarily due to surface faulting and ground shaking. It has been reported that about 10,000 buildings collapsed and 8000 buildings suffered varying degrees of damage. The observed damage to buildings resulted from many factors that include ground movement, acceleration, design code, and construction quality. The damage to buildings near the fault was attributed primarily to the ground movement. One observed phenomenon is that the damage in the up-lifted side (east side) of the rupture fault was much more severe than the opposing side (west side) of the fault mainly due to …

Go to article

Relevant Aspects Of Applying Soil Improvement Method For Liquefaction Mitigation — Case Study, Valtko Sesov, Kosta Talaganov Mar 2001

Relevant Aspects Of Applying Soil Improvement Method For Liquefaction Mitigation — Case Study, Valtko Sesov, Kosta Talaganov

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

This paper presents some experience gathered during the implementation of soil improvement in founding of a residential-business complex located in seismically prone area. The previously performed field and laboratory geomechanical tests proved that the geotechnical medium of the location was characterized by a high heterogeneity of soil materials with predominant presence of layers of low strength-deformability characteristics. A high underground water level and layers of fine-grained uniform sands susceptible to dynamic instability under seismic effects were observed. Such an unfavorable geotechnical situation of the given location imposed the need of improving of the natural foundation soil. The most favorable and …

Go to article

Earthquake Assessment Of Critical Structures For Route Us 60 Missouri, Ronaldo Luna, Genda Chen, Yulman Munaf, Huimin Mu, Shamsher Prakash, Paul Michael Santi, Tom Fennessey, Dave Hoffman Mar 2001

Earthquake Assessment Of Critical Structures For Route Us 60 Missouri, Ronaldo Luna, Genda Chen, Yulman Munaf, Huimin Mu, Shamsher Prakash, Paul Michael Santi, Tom Fennessey, Dave Hoffman

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

The Missouri Department of Transportation initiated a study of that segment of Route US 60 that has been officially designated as “emergency vehicle priority access”. The objectives were to establish a current subsurface and earthquake design geographic information systems (GIS) database for the designated US 60 corridor, and to conduct detailed earthquake assessments at two critical bridge sites along US 60. Databases have been established for current subsurface and earthquake data for the US Route 60 corridor in Butler, Stoddard and New Madrid Counties. These databases serve as the beginning of a larger regional or statewide database for future development …

Go to article

A Laboratory And Numerical Investigation On A Post-Seismic Induced Settlement In Southern Italy, Lucio Olivares, Francesco Silvestri Mar 2001

A Laboratory And Numerical Investigation On A Post-Seismic Induced Settlement In Southern Italy, Lucio Olivares, Francesco Silvestri

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

In the years following the Irpinia earthquake (1980), the old town of Bisaccia, located on a conglomerate hill overlaying a thick clay formation, experienced a slow subsidence revealed by topographic measurements. The paper summarizes the results of the numerical simulations of the effects of the Irpinia earthquake on the Bisaccia hill. The input data for the analyses were the acceleration records of the seismic event at the site and the geotechnical characterization obtained by dynamic and cyclic torsional tests on undisturbed clay shales. The analyses confirmed the hypothesis that the town subsidence was caused by a post-cyclic soil re-compression as …

Go to article

Geotechnical Characterization Of Success Dam For A Dam Safety Earthquake Engineering Evaluation, Matthew G. Allen, John S. Nickell, Steve G. Sherer Mar 2001

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 …

Go to article

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 Mar 2001

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 …

Go to article

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 Mar 2001

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 …

Go to article

Numerical Analysis Of Saturated Sand Under Dynamic Loads, Jae-Soon Choi, Inn-Joon Park, Soo-Il Kim Mar 2001

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 …

Go to article

Non-Linear Modeling Of Dip-Slip Faults Using Applied Element Method, Pradeep Kumar Ramancharla, Kimiro Meguro Mar 2001

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 …

Go to article

Liquefaction Studies On Guaratuba Bay Erosion, Arinos Xavier Tavares Mar 2001

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 …

Go to article

Focal Mechanism Analyses Of The 1993, 1995 Northern Red Sea Sequences Activity, Abdulaziz A. S. Fayez, Nassir S. Al-Arifi Mar 2001

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° …

Go to article

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 Mar 2001

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.

Go to article

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 Mar 2001

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.

Go to article

The 1999 Athens (Greece) Earthquake: Energy And Duration- Related Response Spectral Characteristics Of Different Site Conditions, P. K. Koliopoulos, B. N. Margaris Mar 2001

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 …

Go to article

First Prev Next Last