Generalized Stiffness Matrix for Thin Walled Beams
Stiffness matrix for a structural member is obtained using the differential equations derived by V.Z. Vlasov. Presence of additional off-diagonal elements over the conventional tridiagonal form is observed....

Strength of Composite Beams at Web Openings
A model for the strength of steel-concrete composite beams with unreinforced, rectangular web openings is presented. The model includes the contribution of the concrete slab to shear strength, as well...

Method for Analysis for Guyed Towers
A method for static analysis of guyed towers is extended and applied to problems in three dimensions. The tower and guy cables may be loaded by arbitrary distributed or concentrated forces, or both, and...

Small End Restraint Effects on Strength of H-columns
A parametric study of the strength and behaviour of an axially loaded wide-flange steel column is investigated from the viewpoint of a beam column analysis using the approximate deflection method and the...

Finite Beams on Elastic Foundation with Restraints
A solution is presented of the differential equation of finite beams with elastic restraints, resting on a Winkler foundation in terms of the initial conditions at one end of the beam. This solution can...

Post-Buckling of Plates in Compression and Bending
The elastic post-buckling behavior of rectangular plates in combined compression and bending is presented. The theoretical investigation begins with the Marguerre's compatibility equation and proceeds...

Local and Overall Buckling of Welded Box Columns
An experimental study is presented on the local and overall interaction buckling strength of welded built-up box columns made of high strength steel. A total of twenty-seven box columns with large width-thickness...

Prestressed Steel Grid Erected with Bent Forms
A new method for constructing one-layer steel grids erected by prestressing with the aid of recoverable bending forms is presented, followed by an approximate structural analysis. The grid elements are...

Automated Accident Location Systems
State transportation agencies continue to seek better ways to identify road improvement needs. Research and development funds have been allocated to seek efficient methods for identifying accident locations...

Selection of Pavement Joint Sealant Material
A review of literature shows joint sealant selection should be based on the design, construction and environmental variables. Satisfactory performance for one set of conditions does not imply the same...

Decision Strategy for Asphalt Pavement Recycling
A decision model that uses utility theory to the decision making process in selecting optimum techniques for asphalt pavement recycling is presented. The model requires the identification of all the quantitative...

Highway Fiscal and Program Management for the 1980s
The 1980s are a time of rapid change to most transportation agencies in the country—change in a funding base, which has remained essentially stable for the last 60 years, and change in programs at both...

New Structural Systems for Zero-Maintenance Pavements
Unique and infrequently used concepts and systems suitable for zero-maintenance pavements are identified. For this study, a zero-maintenance pavement is defined as one that will provide at least 20 years...

Recreational Travel: Gasoline Shortages and Price Increases
An empirical study utilizes visitation data from a number of recreational attractions in California to estimate the reduction of travel due to the gasoline price increases that occurred during 1977-79...

U.S. Geological Survey Federal-State Program
The U.S. Geological Survey Federal-State Cooperative Water Resource Program is a partnership between the Geological Survey and State and local agencies for the collection of the hydrologic information...

Water Law Primer
An overview of legal principles controlling water resources use and development is provided. The body of legal principles is a combination of federal and state law, with federal law generally having a...

Evaluation of Environmental Assessment Methods
Twelve representative methods for environmental assessment are described, evaluated, and compared in terms the following seven evaluation criteria: treatment of the probabilistic nature of environmental...

Reservoir Management in Potomac River Basin
Techniques for determining the yield of multireservoir water supply systems have been developed and applied to the system that serves the Washington, D.C. metropolitan area (WMA). This system is composed...

TVA Hydro Scheduling Model: Practical Aspects
Computer programs and mathematical methods have been developed to model long term week-to-week variations in water level, discharge and electrical generation for the 42 reservoirs operated by TVA. The...

TVA Hydro Scheduling Model: Theoretical Aspects
The optimization procedures used in the Tennessee Valley Authority (TVA) HYDROSIM model are described. Scheduling of the TVA operated reservoir system poses a stochastic, nonlinear, multireservoir problem...

 

 

 

 

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