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Articles 12271 - 12300 of 13029

Full-Text Articles in Engineering

Ultimate Moment Capacity Of Thin-Walled Cold-Formed Members Of Vehicular Structures, Frank Monasa, Timothy Chipman Nov 1982

Ultimate Moment Capacity Of Thin-Walled Cold-Formed Members Of Vehicular Structures, Frank Monasa, Timothy Chipman

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.


Sidor's Design Aids For Cold-Formed Steel Beams And Columns, Arnaldo R. Gutierrez, O. Jorge Espinoze Nov 1982

Sidor's Design Aids For Cold-Formed Steel Beams And Columns, Arnaldo R. Gutierrez, O. Jorge Espinoze

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.


Dynamic Behavior Of Locally Buckled Frames, George E. Blandford, Shien T. Wang, Neng T. Wang Nov 1982

Dynamic Behavior Of Locally Buckled Frames, George E. Blandford, Shien T. Wang, Neng T. Wang

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.


Comparison Of Methods Predicting Diaphram Behavior, Paul E. Liedtke, Donald R. Sherman Nov 1982

Comparison Of Methods Predicting Diaphram Behavior, Paul E. Liedtke, Donald R. Sherman

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.


Analysis Of Local Plate Buckling Experimental Data, J. Roorda, K. R. Venkataramaiah Nov 1982

Analysis Of Local Plate Buckling Experimental Data, J. Roorda, K. R. Venkataramaiah

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.


Shear Resistance Of Steel-Stud Wall Panels, Joseph D. Girard, Thomas S. Tarpy Jr. Nov 1982

Shear Resistance Of Steel-Stud Wall Panels, Joseph D. Girard, Thomas S. Tarpy Jr.

CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)

No abstract provided.


Electrodeposition Of Photovolatic Cdte Films, Thomas P. Van Doren, Jack L. Boone, R. Engelken, Z. Maczenski Nov 1981

Electrodeposition Of Photovolatic Cdte Films, Thomas P. Van Doren, Jack L. Boone, R. Engelken, Z. Maczenski

UMR-DNR Conference on Energy

No abstract provided.


Energy Conservation: Impact On Indoor Air, Purush K. Terkonda Nov 1981

Energy Conservation: Impact On Indoor Air, Purush K. Terkonda

UMR-DNR Conference on Energy

No abstract provided.


Development Of A Small Computer-Based Power System Simulator For Economic Dispatch And Operator Training, James Liao, Max D. Anderson, Earl F. Richards Nov 1981

Development Of A Small Computer-Based Power System Simulator For Economic Dispatch And Operator Training, James Liao, Max D. Anderson, Earl F. Richards

UMR-DNR Conference on Energy

No abstract provided.


The Bond Graph - A Power And Energy Modeling Concept, K. Sirivadhna, Earl F. Richards, Max D. Anderson Nov 1981

The Bond Graph - A Power And Energy Modeling Concept, K. Sirivadhna, Earl F. Richards, Max D. Anderson

UMR-DNR Conference on Energy

No abstract provided.


Economic Comparison Of Flat Rate And Concentrating Solar Collectors For Absorption Air-Conditioning, E. A. Sauer, Harry J. Sauer Jr. Nov 1981

Economic Comparison Of Flat Rate And Concentrating Solar Collectors For Absorption Air-Conditioning, E. A. Sauer, Harry J. Sauer Jr.

UMR-DNR Conference on Energy

No abstract provided.


Feasibility Study Of A Wind Energy Conversion System (Wecs) For The Sedgwick County Zoo, Robert I. Egbert, Scott S. Heide, Gary C. Thomann Nov 1981

Feasibility Study Of A Wind Energy Conversion System (Wecs) For The Sedgwick County Zoo, Robert I. Egbert, Scott S. Heide, Gary C. Thomann

UMR-DNR Conference on Energy

No abstract provided.


Coal, Energy And The Environment, Bobby G. Wixson, Betsy T. Kagey Nov 1981

Coal, Energy And The Environment, Bobby G. Wixson, Betsy T. Kagey

UMR-DNR Conference on Energy

No abstract provided.


Estimation Of Water And Energy Requirements For Ground Water Heat Pumps In The United States, Ronald H. Howell, Harry J. Sauer Jr. Nov 1981

Estimation Of Water And Energy Requirements For Ground Water Heat Pumps In The United States, Ronald H. Howell, Harry J. Sauer Jr.

UMR-DNR Conference on Energy

No abstract provided.


Cold Load Pick-Up: Quantifying The Electrical Space Heating Component, Walter W. Lang, Max D. Anderson, David R. Fannin Nov 1981

Cold Load Pick-Up: Quantifying The Electrical Space Heating Component, Walter W. Lang, Max D. Anderson, David R. Fannin

UMR-DNR Conference on Energy

No abstract provided.


Feasibility Study For A Municipal Refuse To Energy Plant, Archie W. Culp Jr. Nov 1981

Feasibility Study For A Municipal Refuse To Energy Plant, Archie W. Culp Jr.

UMR-DNR Conference on Energy

No abstract provided.


Preface, Shamsher Prakash Apr 1981

Preface, Shamsher Prakash

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

No abstract provided.


Sessions, Multiple Authors Apr 1981

Sessions, Multiple Authors

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

No abstract provided.


Organizing Committee, Multiple Members Apr 1981

Organizing Committee, Multiple Members

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

No abstract provided.


A New Soil Model And Dynamic Soil Properties, Y. Gyoten, K. Mizuhata, T. Fukusumi, H. Hamada, T. Hirose Apr 1981

A New Soil Model And Dynamic Soil Properties, Y. Gyoten, K. Mizuhata, T. Fukusumi, H. Hamada, T. Hirose

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

A series of cyclic triaxial loading tests with varying strain amplitude were performed on samples of clay and sand. Three types of polynomial functions and a hyperbolic function were applied to express the experimental nonlinear hysteresis curve of soils under cyclic loading conditions. These functions were used for the earthquake response analysis of the actual ground containing alluvial clay layer and of the idealized saturated sandy soil ground whose stiffness gradually decreases as the development of pore-water pressure. The results of the dynamic responses and the liquefaction potential were compared for a particular actual site and an idealized site by …


Creep Effects On Low-Amplitude Modulus Of Clays, G. A. Athanasopoulos, F. E. Richart Jr. Apr 1981

Creep Effects On Low-Amplitude Modulus Of Clays, G. A. Athanasopoulos, F. E. Richart Jr.

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

The investigation considered effects of on-going or previous drained creep on the low amplitude dynamic shear modulus of normally consolidated artificial and natural clay soils. Resonant column tests using the Hardin and Hall devices determined the low-amplitude shear modulus. Results indicated that the strain-rate of on-going creep determined the kind of effect on shear modulus. High strain-rates produced reduced values whereas low strain-rates slightly increased values of modulus, compared to the no-creep values. Previous creep produced higher values of modulus, when the clay was tested under after-creep isotropic confinement. The rate of secondary increase of shear modulus was not affected …


The Shear Modulus And Deformation Of Soils Under Cyclic Loading, Ting Hu Apr 1981

The Shear Modulus And Deformation Of Soils Under Cyclic Loading, Ting Hu

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

In this paper the dynamic deformation stages of soils under cyclic loading and the major factors affecting the shear modulus of soils are analyzed. The in-situ measurement of surface wave by larger energy source to obtain the shear modulus of the ground is described. On considering the important effect of shearing dilatancy on shear modulus of sandy soils, a modified formula is proposed. For typical soils, the axial strains under cyclic loading are determined either for estimating shear modulus or for the deformation analysis in design.


In-Situ Measurements Of Blast Seismic Waves And Their Safety Distance, Rui-Geng Zhu, Li Zhen Apr 1981

In-Situ Measurements Of Blast Seismic Waves And Their Safety Distance, Rui-Geng Zhu, Li Zhen

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

Empirical formulae and their applications are given after systematically analysing the seismic wave data as measured in various blasting operations. The computed results are ln close agreement with the field measured data


In Situ Measurement On Dynamic Modulus And Damping Of Pleistocene Soils, H. Mori, H. Tsuchiya Apr 1981

In Situ Measurement On Dynamic Modulus And Damping Of Pleistocene Soils, H. Mori, H. Tsuchiya

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

The paper presents the results of measurement on the dynamic modulus of deformation and damping ratio of dense sand or stiff clay of the Pleistocene epoch using a dynamic pressuremeter. The paper first describes an outline of an instrument and procedures of the dynamic pressuremeter test, which include necessary correction of data for eliminating the influence of compressibility and damping of the instrument. From the results of field measurement, the moduli derived from the dynamic pressuremeter tests were found several times greater than those from laboratory tests which were affected by disturbance of soil samples.


Dynamic Triaxial And Vibratory In-Situ Behavior Of Cohesive Soil, M. S. Ei-Hosri, J. Biarez, P. Y. Hicher Apr 1981

Dynamic Triaxial And Vibratory In-Situ Behavior Of Cohesive Soil, M. S. Ei-Hosri, J. Biarez, P. Y. Hicher

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

In-situ and laboratory shear modulus data are presented and compared. In-situ tests included the cross-hole seismic survey at a stiff marl site, while laboratory tests included the cyclic triaxial test on undisturbed specimens obtained from the same site. The cyclic triaxial device presented in this investigation has been developed and improved so that the reliable response of soil can be measured directly from the specimen over a large range of strain (from 10-6 to 10-2 ). A series of cyclic triaxial tests were performed under stress controlled condition over a range of frequency from 0,5 to 10 Hz …


Dynamic Behavior Of Soils From Field And Laboratory Tests, W. P. Grant, F. R. Brown Jr. Apr 1981

Dynamic Behavior Of Soils From Field And Laboratory Tests, W. P. Grant, F. R. Brown Jr.

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

Both geophysical and laboratory tests were used to determine the dynamic shear moduli of medium stiff to hard clays and silts at six sites. The geophysical measurements included conventional downhole tests conducted at low strain levels and modified cross-hole impulse tests conducted over a wide range of strains. Laboratory resonant column and cyclic triaxial tests were performed on soil samples retrieved from borings made at the sites. The results from both the field and laboratory tests of the medium stiff to stiff sols showed fairly good agreement. The laboratory test results of the hard clays and silts, however, were typically …


Soil Model Of Effective Stress For Seismic Loadings, Wang Zhiliang, Wang Yuqing Apr 1981

Soil Model Of Effective Stress For Seismic Loadings, Wang Zhiliang, Wang Yuqing

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

The Generalized Masing Curve, recently proposed, has been improved in this paper to involve the effect of pore pressure on shear modulus and damping ratio. Fraction cycle method for pore pressure generation can be adopted to avoid the iterative computation, which is necessary in equivalent cycle method.


Monitoring Rock Blasting For Tunnel Construction, P. Deó, D. L. Hanson, K. R. Hindo Apr 1981

Monitoring Rock Blasting For Tunnel Construction, P. Deó, D. L. Hanson, K. R. Hindo

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

A program for the monitoring of rock blasting operations for the construction of a sewer tunnel has been discussed. A summary of observations together with pertinent conclusions and recommendations regarding the blasting operations, the potential for damage to nearby structures and criteria for safe blasting operations has been presented. It is recommended that peak particle velocity be restricted to two inches per second in horizontal direction at the nearest existing structure to prevent cracking of walls.


Cyclic Simple Shear Of Large Scale Sand Samples: Effects Of Diameter To Height Ratio, W. D. Kovacs, E. Leo Apr 1981

Cyclic Simple Shear Of Large Scale Sand Samples: Effects Of Diameter To Height Ratio, W. D. Kovacs, E. Leo

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

Cyclic drained simple shear tests on a dry sand using a 12 in diameter sample with sample heights of 1, 2, and 4 in show the effect of Diameter/Height ratio on the shear modulus and percent of critical hysteretic damping at various shear strain levels. The shear modulus is found to increase with cycle number and with increasing specimen size. The D/H ratio is found to affect the shear modulus at low shear strains (< 1 percent) and found to have little effect at higher shear strains and at failure. The hysteretic damping decreases for all values of shear strain tested (0.01 to 1 percent) as the cycle number and D/H ratio increases. Possible implications on design and pore pressure development are mentioned.


Session 1a: Opening Remarks And Moderator's Report, F. E. Richart Jr., Richard D. Woods Apr 1981

Session 1a: Opening Remarks And Moderator's Report, F. E. Richart Jr., Richard D. Woods

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

No abstract provided.