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Articles 35971 - 36000 of 39822

Full-Text Articles in Engineering

Liquefaction Of The Enmedio Island Soil Deposits, A. Jaime, L. Montañez, M. P. Romo Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

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 Apr 1981

Author's Replies, Multiple Authors

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

No abstract provided.


Web Crippling And Combined Web Crippling And Bending Of Steel Decks, Wei-Wen Yu Apr 1981

Web Crippling And Combined Web Crippling And Bending Of Steel Decks, Wei-Wen Yu

CCFSS Library (1939 - present)

INTRODUCTION A. General During the period of October 1968 through September 1980, the 1968 Edition of the AISI Specification was used for the design of steel deck webs that could withstand web crippling and combined web crippling and bending. (1) The design formulas used to prevent web crippling were developed primarily on the basis of tests conducted in the 1940's and 1950's at Cornell University. (2-4) Recently, new types of cold-formed steel sections have been developed and used in building construction. The use of unusual geometric configurations has complicated the design of such members. In order to develop new design …


Survey Of Lane Delineation Methods, Kenneth R. Agent Apr 1981

Survey Of Lane Delineation Methods, Kenneth R. Agent

Kentucky Transportation Center Research Report

The objective of this study was to summarize the nationwide experience pertaining to various lane delineation methods. The usage, cost, and problems associated with each alternative could then be analyzed for the purpose of determining an optimum marking program. A survey of the methods of lane delineation used across the United States was done by means of a questionnaire sent to each state. Responses were received from 46 states. Most of the information dealt with the following lane delineation methods: raised pavement markers, pavement tape, thermoplastic markings, and paint and beads.


Sprinkle-Treated Asphaltic Concrete Surface Course, Donald C. Newberry Jr. Apr 1981

Sprinkle-Treated Asphaltic Concrete Surface Course, Donald C. Newberry Jr.

Kentucky Transportation Center Research Report

This report gives details of construction and some skid resistance data from experimental sprinkle-treatment placed in Nelson County, Kentucky, north of Bardstown, US 31-E. The various types of aggregate, application rates, and precoating processes are reported.


Retrieval Guide: Kentucky Soils Data System, William J. Pfalzer, Louise B. Hensley Apr 1981

Retrieval Guide: Kentucky Soils Data System, William J. Pfalzer, Louise B. Hensley

Kentucky Transportation Center Research Report

The Kentucky Soils Data System is an extensive data file of the physical properties and characteristics of soils as determined by field and laboratory testing. Site locations are available for most samples. Since Kentucky has been mapped geologically (scale 1:24,000), the bedrock at each of these sample locations can be determined, providing better opportunities for studying soil-bedrock (parent material) relationships. A complimentary report covers data input. This report is divided into two sections: data availability and data retrieval. The first section is designed to show the quantity and types of data available and how the data are distributed geographically. The …


Survey Of Effectiveness Of Transportation Services, Jerry G. Pigman, Kenneth R. Agent, Joseph D. Crabtree Apr 1981

Survey Of Effectiveness Of Transportation Services, Jerry G. Pigman, Kenneth R. Agent, Joseph D. Crabtree

Kentucky Transportation Center Research Report

With increased emphasis on public accountability and program evaluation, the need for effectiveness measures to indicate the extent to which an agency's goals and objectives are being met is increasingly apparent. A research study was undertaken to establish and implement a procedure for monitoring the effectiveness of transportation services in Kentucky. Quantitative data for many of the effectiveness measures were obtainable only through responses from the public. Surveys of licensed drivers and bus riders were selected as data sources. This report addresses the procedures and results of the two surveys. Responses were received from 35.5 percent of the 10,000 licensed …


H & V News Apr 1981

H & V News

Building Services Engineering

No abstract provided.


Usage And Limitations Of Characteristic Vector Analysis Of Remote Sensing Multispectral Data For The Identification And Quantification Of Water Quality Parameters, Theodore A. Talay Apr 1981

Usage And Limitations Of Characteristic Vector Analysis Of Remote Sensing Multispectral Data For The Identification And Quantification Of Water Quality Parameters, Theodore A. Talay

Civil & Environmental Engineering Theses & Dissertations

Recent applications of the technique of characteristic vector analysis to remote-sensing water color data has met with varying degrees of success. It is apparent from these experiments that a more thorough understanding of the informational capability of characteristic vector analysis is needed.


H & V News Mar 1981

H & V News

Building Services Engineering

No abstract provided.


Behavior Of C- And Z-Purlins Under Wind Uplift, Parviz Soroushian, Teoman Peköz Feb 1981

Behavior Of C- And Z-Purlins Under Wind Uplift, Parviz Soroushian, Teoman Peköz

CCFSS Library (1939 - present)

INTRODUCTION Cold-formed steel lipped channel (C-) and Z-purlins are used widely in the roofs of metal buildings. They are easy and economical to fabricate and erect. However these sections are weak in the lateral direction and in torsion. In order to use their full bending capacity in the strong direction, they must be braced in the lateral direction and against twisting. Roof panels which are connected to the purlins do provide to some extent such bracing effect by virtue of their shear rigidity and resistance to local bending at the connections. Wind uplift is an important design condition for roof …


H & V News Feb 1981

H & V News

Building Services Engineering

No abstract provided.


Fire Protection Through Modern Building Codes, 5th Edition, James C. Spence, Walter G. Wells, D. F. Boring Jan 1981

Fire Protection Through Modern Building Codes, 5th Edition, James C. Spence, Walter G. Wells, D. F. Boring

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.


Designing Fire Protection For Steel Trusses, Subcommittee On Fire Technology Of The Committee On Construction Codes And Standards, American Iron And Steel Institute Jan 1981

Designing Fire Protection For Steel Trusses, Subcommittee On Fire Technology Of The Committee On Construction Codes And Standards, American Iron And Steel Institute

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.


Fire Resistance Ratings Of Load-Bearing Steel Stud Walls, Subcommittee On Fire Technology Of The Committee On Construction Codes And Standards Jan 1981

Fire Resistance Ratings Of Load-Bearing Steel Stud Walls, Subcommittee On Fire Technology Of The Committee On Construction Codes And Standards

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

No abstract provided.