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Articles 7291 - 7320 of 7869
Full-Text Articles in Civil and Environmental Engineering
Utilization Of Cold Work In Light Gage Steel, N. C. Lind, D. K. Schroff
Utilization Of Cold Work In Light Gage Steel, N. C. Lind, D. K. Schroff
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Elastic-Plastic Buckling Of Cold-Formed Circular Rings, Subhash C. Anand, Alvin R. Griffith
Elastic-Plastic Buckling Of Cold-Formed Circular Rings, Subhash C. Anand, Alvin R. Griffith
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Ductility Criteria And Performance Of Low Ductility Steels For Cold-Formed Members, A. K. Dhalla, G. Winter
Ductility Criteria And Performance Of Low Ductility Steels For Cold-Formed Members, A. K. Dhalla, G. Winter
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
A Review Of The Effective Width Formula, N. C. Lind, M. K. Ravindra, J. Power
A Review Of The Effective Width Formula, N. C. Lind, M. K. Ravindra, J. Power
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Inelastic Buckling Of Thin-Walled Members, S. Rajasekaran, D. W. Murray
Inelastic Buckling Of Thin-Walled Members, S. Rajasekaran, D. W. Murray
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Compressive Buckling Of Perforated Plate Elements, W. P. Vann
Compressive Buckling Of Perforated Plate Elements, W. P. Vann
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Shock Loading Of Thin Compression Elements, Charles G. Culver, Richard Van Tassel
Shock Loading Of Thin Compression Elements, Charles G. Culver, Richard Van Tassel
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Stabilisation Of Beams Against Lateral Buckling, K. C. Rockey, D. A. Nethercot
Stabilisation Of Beams Against Lateral Buckling, K. C. Rockey, D. A. Nethercot
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Orthotropic Folded Plate Structures By Extended Finite Strip Method, Ghulam Husain Siddiqi, C. V. Girija Vallabhan
Orthotropic Folded Plate Structures By Extended Finite Strip Method, Ghulam Husain Siddiqi, C. V. Girija Vallabhan
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Design Of Cold-Formed Hyperbolic Paraboloid Shells, Peter Gergely
Design Of Cold-Formed Hyperbolic Paraboloid Shells, Peter Gergely
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Beams With Corrugated Webs, Donald Sherman, James Fisher
Beams With Corrugated Webs, Donald Sherman, James Fisher
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
A Decision Table Formulation Of The Specification For The Design Of Cold-Formed Steel Structural Members, Paul A. Seaburg
A Decision Table Formulation Of The Specification For The Design Of Cold-Formed Steel Structural Members, Paul A. Seaburg
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Minimum Cost Design Of Composite Floor Systems Using Cold-Formed Steel Decking, J. I. Nicholls, A. T. Merovich
Minimum Cost Design Of Composite Floor Systems Using Cold-Formed Steel Decking, J. I. Nicholls, A. T. Merovich
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Impact Loading Of Thin-Walled Columns, Nishikant R. Vaidya, Charles G. Culver
Impact Loading Of Thin-Walled Columns, Nishikant R. Vaidya, Charles G. Culver
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Investigation Of Cold-Formed Steel-Deck-Reinforced Concrete Floor Slabs, M. L. Porter, C. E. Ekberg Jr.
Investigation Of Cold-Formed Steel-Deck-Reinforced Concrete Floor Slabs, M. L. Porter, C. E. Ekberg Jr.
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Fastener Strength In Diaphragm Braced Members, Amir Simaan, George Winter, Teoman Peköz
Fastener Strength In Diaphragm Braced Members, Amir Simaan, George Winter, Teoman Peköz
CCFSS Library (1939 - present)
SUMMARY In conjunction with research projects on diaphragm-braced members conducted at Cornell University, this investigation deals with the function of the fasteners in the braced system. In these systems, the diaphragm resists the lateral deflections of the braced members, in its plane, by virtue of its shear regidity (Qdr) and its shear strain capacity Yd (as a measure of strength). Considering the system in a slightly deformed shape, compatibility of displacements and forces between the diaphragm and the braced member at their connection locations, implies that the fasteners at these locations are subjected to the action of a system of …
The Analysis And Behavior Of Thin-Steel Hyperbolic Paraboloid Shells, Peter Gergely, P. V. Banavalkar, J. E. Parker
The Analysis And Behavior Of Thin-Steel Hyperbolic Paraboloid Shells, Peter Gergely, P. V. Banavalkar, J. E. Parker
CCFSS Library (1939 - present)
An extensive experimental and analytical investigation of thin-steel hyperbolic paraboloid (hypar) structures was carried out to provide design information. As a result of this work, empirical data is provided regarding the behavior of such structures and computer programs are presented for the analysis of thin steel hypar structures. Hyperbolic paraboloid structures possess a unique combination of structural and architectural properties, some of them are the following 1) Due to the double curvature of the surface the internal stresses in the deck are generally low and the deflections are small. 2) Since a hyper surface can be generated by straight lines, …
Column Research Council: Proceedings 1971, Column Research Council
Column Research Council: Proceedings 1971, Column Research Council
CCFSS Library (1939 - present)
One of the purposes of the Council is to maintain a forum where problems related to the design and behavior of columns and other compression elements in metal structures can be presented for evaluation and discussion. The Annual Technical Session provides opportunity to carry out this function. The 1971 Annual Technical Session was held on May 25 and 26 at the Pick-Rosseve1t Hotel in Pittsburgh, Pennsylvania. Seventy-seven persons attended the Session and twenty-two papers were delivered. A panel discussion on "Fire Effects on Structural Stability" was held in the evening of May 25. In conjunction with the Technical Session, an …
Damping Capacity Of A Model Steel Structure, Dixon Rea, R. W. Clough, Jack G. Bouwkamp
Damping Capacity Of A Model Steel Structure, Dixon Rea, R. W. Clough, Jack G. Bouwkamp
CCFSS Library (1939 - present)
The damping capacities of seven model steel structures, each consisting of a heavy steel platform supported on four columns, have been determined from forced vibration tests. The vibrations were produced by an eccentric-mass vibration generator, and the amplitudes ranged from small displacements up to slightly greater than yield displacement. The tests were terminated at the higher amplitudes once fatigue cracks formed in any of the joint welds in the columns. For vibration amplitudes up to a critical amplitude slightly less than yield displacement, the damping factors of the structures were constant, independent of amplitude, and ranged between .15 and .25~ …
Analysis Of Light Gage Steel Shear Diaphragms, Albert R. Ammar, Arthur H. Nilson
Analysis Of Light Gage Steel Shear Diaphragms, Albert R. Ammar, Arthur H. Nilson
CCFSS Library (1939 - present)
INTRODUCTION: It has long been recognized by structural engineers, that light gage steel cladding floor and roof decking systems have a considerable stiffening and strengthening effect on building frameworks. The beneficial contribution of these diaphragm systems is most pronounced when the structure as a whole is subjected to loads which result in an in-plane shear action of the cladding. This occurs, for example, when the rigidity of a floor or roof diaphragm acting as a membrane is utilized to transmit lateral forces to stiff end walls. Another example of diaphragm action is found in pitched roof portal sheds under vertical …
Analysis Of Light Gage Steel Shear Diaphragms, Albert R. Ammar, Arthur H. Nilson
Analysis Of Light Gage Steel Shear Diaphragms, Albert R. Ammar, Arthur H. Nilson
CCFSS Library (1939 - present)
INTRODUCTION It has long been recognized by structural engineers, that light gage steel cladding floor and roof decking systems have a considerable stiffening and strengthening effect on building frameworks. The beneficial contribution of these diaphragm systems is most pronounced when the structure as a whole is subjected to loads which result in an in-plane shear action of the cladding. This occurs, for example, when the rigidity of a floor or roof diaphragm acting as a membrane is utilized to transmit lateral forces to stiff end walls. Another example of diaphragm action is found in pitched roof portal sheds under vertical …
Analysis Of Light Gage Steel Shear Diaphragms, Arthur H. Nilson
Analysis Of Light Gage Steel Shear Diaphragms, Arthur H. Nilson
CCFSS Library (1939 - present)
A method is presented for the elastic analysis of shear diaphragms composed of standard light gage steel panels. A finite element approach is adopted, in which the mechanical properties of the diaphragm components are incorporated in an analytical model of the assemblage, using the direct stiffness method of matrix structural analysis. Results are compared against experimental values.
Open-Channel Profiles By Newton's Iteration Technique, D. L. Fread, Terence E. Harbaugh
Open-Channel Profiles By Newton's Iteration Technique, D. L. Fread, Terence E. Harbaugh
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
Computation of surface profiles for steady gradually varied flow can be accomplished by use of Newton's Iteration Technique. The magnitude of error is controlled and the profile depth can be conveniently calculated at selected distances upstream or downstream from a control point. A Fortran IV program is provided for utilizing the technique in a trapezoidal channel. © 1971.
Interactions Between Selected Pigment Producing Bacteria Isolated From Sewage, Leslie Alexander Lakie
Interactions Between Selected Pigment Producing Bacteria Isolated From Sewage, Leslie Alexander Lakie
Masters Theses
"Pigmented bacteria have been of interest to the microbiologist for several years. The pigmented organisms in sewage have been known to gain predominance, but no investigations have been made to determine whether the pigment assists the organism in gaining predominance. During this study a number of bacteria which produced a water soluble pigment were isolated from sewage. These bacteria were grown in shaken flasks using tryptone Glucose extract broth as a medium. Growth studies of the bacteria in pure and mixed culture were performed to determine if the pigment could affect another bacteria's growth. Studies were also performed using the …
Shear Properties Of An Organic Soil And The Same Soil With The Organic Matter Removed, David Eugene Daniels
Shear Properties Of An Organic Soil And The Same Soil With The Organic Matter Removed, David Eugene Daniels
Masters Theses
"The effect of strain rate on the shearing properties of an organic A̲ horizon Bryce clay and the same soil treated with hydrogen peroxide to remove the organic matter was studied. For both soils, the pore pressures were found to be independent of strain rate, and dependent only on the increment of strain during shear. The effect of the hydrogen peroxide treatment on the shear properties of an inorganic Bryce B̲ horizon clay was also studied. It was concluded that the hydrogen peroxide does not affect the mineral properties of the Bryce clay and serves only to selectively remove organic …
Advanced Waste Treatment Of Industrial Waste Waters By Physicochemical Processes, Michael Gay Hardie
Advanced Waste Treatment Of Industrial Waste Waters By Physicochemical Processes, Michael Gay Hardie
Masters Theses
"The primary objective of this investigation was to determine the general applicability of using physicochemical processes for treating different types of industrial wastes. Emphasis was placed on the evaluation of the treatment efficiency and the performance difficulties encountered in the treatment of each waste. Two types of waste were studied, one a high strength acidic industrial chemical waste and the other a petroleum refinery waste. The physicochemical system utilized included chemical coagulation and clarification plus activated carbon adsorption. Parallel operations of fixed-bed and expanded-bed carbon adsorbers were conducted. Treatment efficiencies were evaluated in terms of the removals of chemical oxygen …
The Skid Resistance Of Asphaltic Pavements Using Glass Aggregates, Michael Vaughn Korth
The Skid Resistance Of Asphaltic Pavements Using Glass Aggregates, Michael Vaughn Korth
Masters Theses
"The disposal of the glass portion of solid waste is an ever-growing problem in the U.S. and recycling has been suggested as a possible solution. In order to find new uses for waste glass, investigations have been conducted to determine if the glass could be used as an aggregate in bituminous concrete mixtures. As part of the overall investigation, this study was concerned with investigating the skid resistance properties of the glass aggregate mixtures, called glasphalt. The objectives were to compare the skid resistance of various bituminous mixtures using aggregate combinations ranging from all glass to all conventional aggregate and …
The Artificial Sedimentation Of Soil, John Richard Wagner
The Artificial Sedimentation Of Soil, John Richard Wagner
Masters Theses
"Previous investigations concerned with artificially sedimented soils and a review of the literature on soil structure are summarized. These studies show that many of the physical properties of a soil depend upon its structure and that the structure of a sedimented soil depends principally upon the salt content of the pore water. In addition, artificially sedimented soils have been shown to have a "natural" soil structure. An apparatus was developed which will automatically sediment soils in water of controlled salt content. To determine whether or not the apparatus was able to sediment uniform and homogeneous soil samples, moisture content determinations, …
Dynamic Behavior Of Eccentrically Stiffened Plates, Charles Stuart Ferrell
Dynamic Behavior Of Eccentrically Stiffened Plates, Charles Stuart Ferrell
Doctoral Dissertations
"The dynamic behavior of eccentrically stiffened rectangular plates is studied by the finite element method. The addition of stiffeners to a plate structure is a common method of increasing the rigidity of the structure with a minimum of weight increase. However, this stiffened plate configuration does not easily lend itself to analysis. This study is an approach to finding a rational method by which the dynamic behavior of such a stiffened plate structure may be determined. The governing differential equations for the finite element model are derived and the stiffness and mass matrices for the plate and stiffener elements are …
Reservoir Design: Simulation Techniques, Larry W. Mays
Reservoir Design: Simulation Techniques, Larry W. Mays
Masters Theses
"A simulation model is developed to aid in the analysis of small dams to reduce the possibility of inadequate spillway designs. Basic assumptions concerning the geometric aspects of the natural reservoir are made to develop the model which is based upon describing the timing and magnitude of a design flood passing through a reservoir. Simulation equations are derived from the basic continuity equation and describe reservoir outflow and storage as functions of reservoir depth. Newton's Iteration Technique is utilized to solve the simulation equations for the reservoir depth. The resulting simulation model determines an optimum size auxiliary spillway having a …