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Full-Text Articles in Geotechnical Engineering
Source Mechanism And Seismic Effect Of Tangshan Earthquake, Hong-Qi Fang, Xin-Kwan Miao, Shu-Dong Zhao
Source Mechanism And Seismic Effect Of Tangshan Earthquake, Hong-Qi Fang, Xin-Kwan Miao, Shu-Dong Zhao
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
By analyzing the seismic mechanism of the Tangshan earthquake and its pattern of movement through the study of ground deformation and ground strain of the Tangshan earthquake area it is clear that the breeding and occurrence of this event are controlled by a long-term intense active fault zone. By the ground deformation, displacement, tectonic features and seismic effects after the event, this causative fault is known to be composed of a group of NNE trending right turn strike-slip faults and thus we call it the Tangshan active fault zone.
Observed And Predicted Liquefaction Of A Sand Stratum, A. Jaime, M. P. Romo, L. Montañez
Observed And Predicted Liquefaction Of A Sand Stratum, A. Jaime, M. P. Romo, L. Montañez
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Field observations and preliminary studies had led to the conclusion that the sand stratum liquefied only in a limited area during the March 14, 1979 earthquake. Further field studies revealed the presence of the sand layer throughout the Enmedio Island. This fact raised questions as to whether the sand liquefied or not in the whole area. To clarify this question, a research program which included cyclic triaxial testing and numerical analyses was undertaken. The results of this study show that the sand layer did liquefy through the Island; however, due to differences in stratigraphic characteristics, superficial signs of liquefaction were …
Local Site Behaviour In The 1976 Friuli Earthquake, M. Basili, V. Gorelli, F. Muzzi
Local Site Behaviour In The 1976 Friuli Earthquake, M. Basili, V. Gorelli, F. Muzzi
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Soon after the main shock of Friuli, Italy, May 6th 1976 earthquake, two strong motion recorders accelerographs were installed in two sites about 650 meters distant one from the other. One instrument was installed on hard outcropping rock, the other at the surface of an alluvial deposit 20+25 meters thick underlain by a sloping bedrock. Among the numerous records obtained three aftershocks of magnitude about 6 and hypocentral distance within 20 Km, are investigated by comparing maximum accelerations, durations, Arias intensity and Husid ratios. A new numerical tool is proposed which consists of a series of plots of the Husid …
Observations And Analysis On Building Settlement Due To Tangshan Earthquake, Huang Xiling
Observations And Analysis On Building Settlement Due To Tangshan Earthquake, Huang Xiling
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper describes the significant settlement of buildings on saturated soft clay due to Tangshan earthquake. Results of dynamic triaxial tests and analysis of stress in subsoil will be given. The factors which influence the settlement will also be discussed herein.
Liquefaction Of The Enmedio Island Soil Deposits, A. Jaime, L. Montañez, M. P. Romo
Liquefaction Of The Enmedio Island Soil Deposits, A. Jaime, L. Montañez, M. P. Romo
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The results of field testing and of simplified liquefaction analyses of the Enmedio Island soil deposits are presented and discussed in this paper. It is found that for this case history simple criteria for assessing liquefaction potential yield results in accord with field behavior.
Geotechnical And Strong Motion Aspects Of Recent Indian Earthquakes, Jai Krishna
Geotechnical And Strong Motion Aspects Of Recent Indian Earthquakes, Jai Krishna
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
India had many strong earthquakes in the past. The paper describes some strong motion and geotechnical aspects of Indian earthquakes.
Geomechanics Of Reservoir Induced Seismicity, Thomas Vladut
Geomechanics Of Reservoir Induced Seismicity, Thomas Vladut
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Although induced seismicity associated with the impounding of reservoirs is a relatively rare phenomenon, it should nevertheless be taken into account, particularly in the design of dams located in aseismic zones. The operation of dams is not significantly affected by induced activities: the main concern arises in situations where unexpected events might affect the behavior of the construction due to soil liquefaction or might affect slope stability. This paper reviews the principal elements which are considered to affect the occurrence of the phenomenon: the weight of the water storage, and the development of pore pressure under the storage. Both elements …
Planning Instrumentation Monitoring In Dams, S. N. Guru Rau, R. K. Varma
Planning Instrumentation Monitoring In Dams, S. N. Guru Rau, R. K. Varma
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
This paper outlines the seismic instrumentation being adopted for river valley projects in India, More than 60% of Indian sub-continent lies in an active seismic belt. Of this the middle and lower Himalayas constitute a major area wherein lies a huge untapped hydro-power potential, Being primarily constituted of younger rock formations, frequented by faults, thursts and shear zones and lying in a high seismic risk zone, observations through instruments play a significant role in perspective planning of projects in this area. Setting up of seismological observatories in advance of construction of dam projects, forms a part of investigative planning to …
Dynamic Consolidation Of Liquefiable Sands, R. K. M. Bhandari
Dynamic Consolidation Of Liquefiable Sands, R. K. M. Bhandari
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The Subsoils underneath a tank were improved by dynamic consolidation to density levels required to resist earthquake induced liquefaction. The paper presents seismic analysis of the refinery region, simple liquefaction potential analysis using modified depth reduction factors and performance of the tank resting on the densified ground. The degree of uniformity of compaction achieved by the dynamic consolidation has been discussed.
Local Soil Effects And Liquefaction In The 1978 Thessaloniki Earthquakes, George Gazetas, John Botsis
Local Soil Effects And Liquefaction In The 1978 Thessaloniki Earthquakes, George Gazetas, John Botsis
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The geotechnical aspects of three earthquakes that struck the city of Thessaloniki, Greece, on May 25, June 20 and July 4, 1978 are presented. General background information on the observed damage, seismic history and geology of the area is followed by detailed description of soil profiles, structural characteristics and accelerograms of ground motions recorded at three sites. Acceleration spectra are then examined and compared in order to assess the degree to which local and regional geology and soil-structure interaction affected the recorded motion. Finally, the possibility of liquefaction having taken place in a 6 m-thick saturated loose layer of silty …
Engineering Seismology Aspects Of The M-6.5, Southern Italy Earthquake Of Nov. 23, 1980: A Preliminary Review, E. Faccioli
Engineering Seismology Aspects Of The M-6.5, Southern Italy Earthquake Of Nov. 23, 1980: A Preliminary Review, E. Faccioli
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The paper provides an overview of salient engineering seismology features of the earthquake, which was one of the major seismic catastrophes occurring in Italy in this century. After a short description of the characteristics of the earthquake source and of the historical seismicity of the region, preliminary strong-motion and intensity data are presented. Aspects of geotechnical engineering interest include some large landslides in inhabited areas, and notable cases of correlation between severity of damage and local soil conditions and topography.
Attenuation Of Ground Vibration Induced By Dynamical Machinery, S. J. Yang
Attenuation Of Ground Vibration Induced By Dynamical Machinery, S. J. Yang
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Attenuation of ground vibration induced by dynamic machinery is investigated with fundamental theory established for both Rayleigh and body waves. Therefore, for determining such attenuation is established, in which the effects of both of them and a coefficient of attenuation of soil that makes the practical calculation easier are involved. A lot of data in relation to the surface vibration measured at some production shops and construction sites has proved that the developed formula more satisfactory than Bornitz's.
Considerations About Some Aspects Of The 23rd November 1980 Earthquake, Filippo Ciuffi, Giuseppe Samela
Considerations About Some Aspects Of The 23rd November 1980 Earthquake, Filippo Ciuffi, Giuseppe Samela
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
The macroscopic effects of the earthquake of the 23rd of November 1980 in southern Italy are well-known. The purpose of this short paper is to present after about five months, some more exact testimonies with some considerations about numerous questions connected to the geotechnical and geological problems in seismic areas. We have to be precise that we, in this paper, contemplate the MURO LUCANO and CASTELGRANDE areas (in Basilicata) (fig. 1)
Session 8: Discussions, Multiple Authors
Session 8: Discussions, Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Discussion On Moderator's Report, Peter M. Byrne
Discussion On Moderator's Report, Peter M. Byrne
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Discussion On "Improvement Of Characteristics Of A Liquefiable Soil Deposit By Pile Driving Operations", By M. Iyengar, Miguel P. Romo
Discussion On "Improvement Of Characteristics Of A Liquefiable Soil Deposit By Pile Driving Operations", By M. Iyengar, Miguel P. Romo
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Discussion On "Dynamic Consolidation Of Liqufiable Sands", By R.K.M. Bhandari, Miguel P. Romo
Discussion On "Dynamic Consolidation Of Liqufiable Sands", By R.K.M. Bhandari, Miguel P. Romo
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Author's Replies, Multiple Authors
Author's Replies, Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
On Surface Waves In A Gibson Half-Space, I. Vardoulakis, V. Dougalis
On Surface Waves In A Gibson Half-Space, I. Vardoulakis, V. Dougalis
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Harmonic Rayleigh-type and transverse surface waves in a half-space of incompressible material with constant density and with shear modulus linearly increasing with depth (Gibson half-space) are discussed. Under certain hypotheses a discrete spectrum yielding polynomial Eigen functions is obtained, a fact which makes the eigenvalue problem more tractable. The dispersion laws are presented and evaluated numerically.
Discussions, Dinesh C. Gupta, G. L. Hempen
Discussions, Dinesh C. Gupta, G. L. Hempen
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.
Author's Replies, Multiple Authors
Author's Replies, Multiple Authors
International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
No abstract provided.