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Geotechnical Aspects Of The Petrolia Earthquake, Robert K. Green, Thomas L. Sawyer

International Conference on Case Histories in Geotechnical Engineering

The Petrolia, California earthquake (M_S 6.9, M_L 6.4) occurred on April 25, 1992 and was followed by numerous aftershocks including two earthquakes over magnitude 6 that occurred on April 26, 1992. The earthquakes caused structural damage in Ferndale, Petrolia, Honeydew, Rio Dell, Fortuna, and Scotia. The earthquake also produced ground failures of liquefaction, lateral spreads, and landslides in the epicentral region. Liquefaction did not appear to be widespread, and occurred in locations where it would most likely be expected to occur (low lying areas with very recent alluvial deposits and high ground water). Scattered landslides were triggered by …

Liquefaction During 1988 Earthquakes And A Case Study, M. K. Gupta

International Conference on Case Histories in Geotechnical Engineering

Several parts of north eastern India, Bangladesh and Burma were rocked by an earthquake on August 6, 1988. The author carried out earthquake damage survey due to liquefaction in Assam region. Wide spread liquefaction in the area was observed. Guide bunds and approach roads of a road bridge near Tezpur performed excellently against liquefaction during the earthquake for which they were designed. Another earthquake of magnitude 6.6 visited Nepal Bihar border region which shook northern Bihar and Nepal region and was felt as far as Jaipur in the west and Shillong in the east. Large scale liquefaction has also been …

Liquefaction During The October 12, 1992, Egyptian Dahshure Earthquake, Ahmed-W. Elgamal, Mohamed Amer, Korhan Adalier

International Conference on Case Histories in Geotechnical Engineering

On October 12, 1992 a moderate earthquake M_B = 5.9 (M_S = 5.2) occurred about 18 km southwest of the center of Cairo and resulted in significant damage to numerous poorly constructed structures. Soil liquefaction associated with the occurrence of large sand-boils was observed close to the epicenter. As a consequence, a main road suffered a maximum settlement of about 1.75 m. In this study, the earthquake characteristics, soil profiles and resulting liquefaction are discussed. The observed liquefaction mechanisms provide valuable information on the seismic response of Nile deposited alluvial soils. Such soils constitute much of the inhabited …

Nonlinear Dynamic Effective-Stress Analysis Of Two Case Histories, S. Inel, W. H. Roth, C. De Rubertis

International Conference on Case Histories in Geotechnical Engineering

Two case histories were analyzed to determine the validity of using nonlinear numerical analysis methods together with simple and familiar descriptions of soil behavior to predict shaking-induced excess pore pressures and permanent deformations within soil. The first case focuses on the prediction of liquefaction during centrifuge testing of a silt layer underlain by sand. The second case involves the prediction of behavior of the Upper San Fernando Dam during the 1971 San Fernando earthquake. Results of both analyses show that consistent and reasonably accurate estimates may be made of the behavior of soil during seismic loading. The relative simplicity of …

Response Analyses Of Recorded Earthquake Motions, S. J. Serhan

International Conference on Case Histories in Geotechnical Engineering

Response analyses of three recorded earthquakes at a nuclear power plant have been conducted. The objective of the response analyses is to obtain frequency composition, assess damage potential, and simulate and explain the recorded soil and structural seismic motions. Two- and three-dimensional models for the soil/structure system have been developed by using the finite-element substructuring method. Results of the analyses show clear evidence of soil/structure interaction in terms of significant soil softening, strong rocking mode participation and unusual recorded high-frequency response inside the buildings.

Response Of House Foundations During The Loma Prieta Earthquake, Gennaro G. Marino

International Conference on Case Histories in Geotechnical Engineering

Significant damage to house foundations has resulted from the Lorna Prieta earthquake. In some cases the cost to repair the foundation and to make the necessary seismic upgrades exceeded the market value of the house. This level of foundation damage was found at various distances from the epicenter and in different geologic settings. Presented in this paper are observations made on the foundation responses to various ground effects from the earthquake shaking. Also pointed out is the difference in performance of various affected foundation systems.

Design And Observation Of Steep Reinforced Embankments, T. Yamanouchi, N. Fukuda

International Conference on Case Histories in Geotechnical Engineering

Using the design method proposed by R. A. Jewell et al. numerous steep reinforced embankments have been constructed in the authors’ home country since the year 1984. In fact these soil structures are built with the reinforcement of polymer grids (the so-called geogrids invented by F. B. Mercer of U.K.) which have a unique structural composition with high-tensile and low-ductility characteristics. This paper deals with first the development of steep reinforced soil structures and their design method, and then introduces a well-documented case history of steep reinforced embankment. The authors propose a current design method developed on the basis of …

Leaning Tower Of Pisa — Updated Information, M. Jamiolkowski, R. Lancellotta, C. Pepe

International Conference on Case Histories in Geotechnical Engineering

The paper is aimed at giving information on the present situation of the Leaning Tower of Pisa and on the activities undertaken for its safeguard by the International Committee appointed in May 1990 by the Italian Government. After a brief review of the subsoil conditions of the structural features and of the observed movements of the Tower, the activities undertaken by the Committee are also summarized.

Seismic Response Of The Pile Foundation Of Ohba-Ohashi Bridge, George Gazetas, Takashi Tazoh, Katsumi Shimizu, Ke Fan

International Conference on Case Histories in Geotechnical Engineering

The paper outlines the recorded response to numerous earthquakes of the pile foundation, the supporting soil, and the superstructure of the main pier of a road bridge. The records include free-field accelerograms at the ground surface and the base of the alluvial deposit, accelerograms on the footing and the superstructure, and the bending and axial strain histories at several depths along two of the sixty-four piles. Recently developed methods of seismic analysis are used in interpreting the recorded data. Extensive comparisons are made between theory and measurements. Successes and failures of the theory are discussed. Emphasis is given to the …

Investigation Of Traffic Induced Ground Vibration By Random Process Theory, J. Benčat

International Conference on Case Histories in Geotechnical Engineering

The ground motion is caused by vibration propagation due to moving vehicles. Ground vibration recorded at a distance from a busy roadway or railway is analyzed assuming it to be a random and statistically stationary function of time. The soil media are characterized as the visco- elastic halfspace. The analytical method for predicting ground vibration has been described. The spectral density of ground vibration for a particular case was calculated and the prediction is validated by experimental measurement.

Dynamic Response Of Block Foundations, Vijay K. Puri, Braja M. Das

International Conference on Case Histories in Geotechnical Engineering

This paper presents the results of comparison of the computed and observed response of two block foundations made of concrete. The test blocks measuring 3.0m x 1.5m x 0.7m and 1.5m x 0.75m x

0.70m were cast on level ground. The blocks were excited into vertical vibrations using a speed controlled mechanical oscillator. The amplitudes of vibration at different frequencies of excitation were measured in each case using acceleration transducers mounted on appropriate faces of the block. Dynamic shear modulus at this site was also determined b¥ conducting in-situ tests namely the wave propagation test, the cyclic plate load test, …

Dynamic Compaction Test On An Hydraulic Silty Sand Fill, G. Varosio, P. Grimaldi, G. Canepa

International Conference on Case Histories in Geotechnical Engineering

Dynamic compaction resulted to be the most effective method to compact a very loose hydraulic silty sand fill, with a fine content from 25 to 90 per cent. Two levels of compaction energy were tested. The soil settlements enforced by these energies were verified with reference to the concept of saturation energy and by means of a simplified analysis of the physical model.

Correlation Of Foundation Vibration Results, R. A. Slabbaert, J. P. Lee, J. A. Bohinsky

International Conference on Case Histories in Geotechnical Engineering

The vibration a paper machine generates during normal operation presents a complicated challenge to engineers of paper machine support structures. The modeling and the analysis procedure inevitably involves many simplifications and assumptions. Therefore, a comparison of the calculated and the measured results is very helpful in assessing the validity of the overall approach. This paper discusses correlation of calculated paper machine vibration with actual field measurements for a specific paper machine installation. A force-response analysis was performed using a commonly accepted industry practice which is generally considered to be conservative in several areas. Subsequently, field vibration measurements were made. The …

Behavior Of Braced Sheetpile Excavation In Detroit Clay, H. Abedi, T. G. Porter, B. H. Lien, J. A. Ramos

International Conference on Case Histories in Geotechnical Engineering

This paper presents the design criteria, finite element modeling and actual behavior of a braced sheetpile excavation in Detroit soft clay. Due to the close proximity of existing structures to the excavation, a detailed analysis was performed to design and construct an earth retention system to avoid damage to these structures. The excavation involved a 170 ft by 220 ft area. The maximum depth of excavation was 23.5 ft. The subsurface soil consists of soft to very soft Detroit clay from the excavation level to a depth of 80 ft and has an undrained shear strength as low as 360 …

Behavior Of Deep Excavations Using Sheet Pile Bracing System In Soft Bangkok Clay, Wanchai Teparaksa

International Conference on Case Histories in Geotechnical Engineering

The sheet pile bracing system is the most well-known for excavation work in Bangkok soft marine clay. The sheet pile wall which is defined as flexible wall will show a large significant of lateral deformation and ground surface settlement if the excavation system is carried out without a good quality control. The sheet pile bracing system with fully effective preloading strut system was designed for basement excavation of 11.3 m. deep of Bai Yok Tower II. The results indicate that berm width can reduce the maximum sheet pile wall deflection only at the first three stages of excavation. The fully …

Measurements Of Seismic Road Vibrations, L. T. Long

International Conference on Case Histories in Geotechnical Engineering

Vibrations from vehicles on adjacent roads can impact sensitive instruments or structures with historic significance. The amplitudes of vibrations (A) from steady traffic in Atlanta, Georgia, were found to decay with distance (r) according to the relation Log[A(mm/s) ]=0.9-1.25Log(r(m)]. Intervening topographic relief reduces the level of vibration. Using this relation, the impact of a proposed highway was estimated to cause an 8 percent degradation in photographic images with telescope. A topographic barrier could reduce, but would not eliminate the impact of highway vibration. In a second application, a freeway access ramp was originally planned close enough for the vibrations from …

General Report Session No. 4: Case Histories Man-Made Vibrations, Vijay K. Puri, James P. Lee

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Discussions And Replies Session 4, M. R. Svinkin, G. M. S. Manyando, M. R. Lewis, J. R. Davie, X. J. Yang, G. Y. Gao

International Conference on Case Histories in Geotechnical Engineering

No abstract provided.

Meeting Minutes, Wku Staff Council

Staff Council

Minutes of the May 19, 1993 meeting.

The Impact Of Seclusion Timeout On Behavior Problems In Three Conduct Disordered Boys, Amy M. Webb, Robert Lusk, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Synthesis Of Trans-4-Methyl-L-Proline, Biao Zhang, Jeffrey Frick, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Factors Affecting Communication Between Emergency Department Nurses, Malynnda Wright, Dr. Donna Hartweg, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

The Photochemistry Of Nitrous Acid And Nitrite Ion, Kathryn E. Shanks, Timothy R. Rettich, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Effect Of Temperature On Growth Of The Zebra Mussel, Dreissena Polymorpha, Tamara K. Ross, Gail Lima, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Eating Disorder Pathology And Its Relation To Depression And Self-Esteem In College Students, Derik M. Thieme, Robert Lusk, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Factors Influencing Variation In Susceptibility Of Prairie Plants To An Early Summer Frost In East-Central Minnesota, Bette L. Purnell, Dr. Given Harper, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

The Effects Of Unilateral Injections Of Neuropeptide K (Npk) Into The Dorsal Midbrain Central Gray (Dmcg) On The Expression Of Female Rat Sexual Behavior, Jason Pequette, Wayne Dornan, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

A Novel Technique For Studying The Shear Elastic Response Of Weak Solids, Jason A. Payne, Narendra Jaggi, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

Assessment Profiles Of Children And Adults Identified As Learning Disabled, Melanie Mcdiarmid, Robert Lusk, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.

The Systematic Relationship Of Hipposideros Commersoni Matungensis To Other Species Of Rhinolophoidae, Maureen Koneval, Dr. Thomas Griffiths, Faculty Advisor

John Wesley Powell Student Research Conference

No abstract provided.