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Articles 17731 - 17760 of 21795

Full-Text Articles in Engineering

Observations And Analysis On Building Settlement Due To Tangshan Earthquake, Huang Xiling Apr 1981

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.

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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.

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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.

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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 …

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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 …

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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.

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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 …

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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.

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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.

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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)

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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 …

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Application Of Generalized Geometric Programming In Preliminary Plant Design, Dennis R. Hoerner, Orrin K. Crosser Apr 1981

Application Of Generalized Geometric Programming In Preliminary Plant Design, Dennis R. Hoerner, Orrin K. Crosser

Chemical and Biochemical Engineering Faculty Research & Creative Works

This study utilizes a primal based generalized geometric programming algorithm for the optimal design of a model absorber-stripper process. The GGP algorithm reduces the generalized geometric program to a convex, linear program by two sequential condensation procedures and a logarithmic transformation. Although inactive Inequality constraints and arbitrary variable bounds were easily accommodated by the algorithm, considerable effort was required to activate the inequality constraints which required an equality condition. The GGP algorithm converged to a local minimum from arbitrary starting points for approximately 60% of the trials. © 1981, American Chemical Society. All rights reserved.

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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 …

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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.

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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.

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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.

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Fire Resistance Ratings Of Load Bearing Steel Stud Walls With Gypsum Wallboard Protection, American Iron And Steel Institute Jan 1981

Fire Resistance Ratings Of Load Bearing Steel Stud Walls With Gypsum Wallboard Protection, American Iron And Steel Institute

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

No abstract provided.

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Phase 1 Inspection Report: National Dam Safety Program. White River Basin. Ozark Lead Tailings Dam, Reynolds County, Missouri, Woodward-Clyde Consultants, Chicago, Illinois Jan 1981

Phase 1 Inspection Report: National Dam Safety Program. White River Basin. Ozark Lead Tailings Dam, Reynolds County, Missouri, Woodward-Clyde Consultants, Chicago, Illinois

Missouri Dam Safety Inspection Reports

This report presents the results of field inspection and evaluation of the Ozark Lead Tailings Dam. It was prepared under the National Program of Inspection of Non-Federal Dams.

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Steel Deck Institute, Inc. Design Manual For Composite Decks, Form Decks, And Roof Decks, Steel Deck Institute Jan 1981

Steel Deck Institute, Inc. Design Manual For Composite Decks, Form Decks, And Roof Decks, Steel Deck Institute

Steel Deck Institute (SDI) Specifications and Manuals (1939 - present)

No abstract provided.

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Steel Deck Institute Diaphragm Design Manual First Edition, Larry D. Luttrell Jan 1981

Steel Deck Institute Diaphragm Design Manual First Edition, Larry D. Luttrell

Steel Deck Institute (SDI) Specifications and Manuals (1939 - present)

The Major Units Laboratory at West Virginia University has been involved in full-scale diaphragm studies for the past fifteen years. The work has covered tests on a wide range of deck panel types, metal building wall systems, panels with insulating concrete fill, and plywood assemblies, all used as diaphragms, and under static, cyclic, and dynamic loading. Connection performance, critical to diaphragm behavior, has been evaluated through an extensive test program covering arc-spot (puddle) welds, different types of screws, and power driven pins. These have established fastener strength limits and have been especially important for defining fastener flexibility factors.

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Bolted Connections In Cold Formed Steel Structures, Wei-Wen Yu, Randall L. Mosby Jan 1981

Bolted Connections In Cold Formed Steel Structures, Wei-Wen Yu, Randall L. Mosby

CCFSS Library (1939 - present)

No abstract provided.

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

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

CCFSS Library (1939 - present)

In this edition, fire protection regulations are not included and requirements of model codes and recommendations of code writing organizations are cited in the text. Much progress has been made in building construction techniques and in material development since the publication of the First Edition in 1944. While this Fifth Edition reflects that progress, it adheres to its original purpose to help develop construction standards for safeguarding life and property from fire.

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