Construction Education: Past, Present, and Future
Higher education for construction managers demands increased attention by the colleges and universities, and the construction industry. The present-day programs have developed only recently...

Stochastic SH Waves along a Frictional Interface
The reflection, refraction, and adsorption of a planar SH wave with stochastic time dependence at a frictionally bonded interface between elastic solids is considered. The incident stress...

Nonlinear Transient Phenomena in Elastic-Plastic Solids
A finite element model is proposed to analyze nonlinear transient phenomena in elastic-plastic solids due to both material and geometrical nonlinearities. Time integration of the semi...

Forest Service Timber Bridge Specifications
Approximately one half of the 12,000 Forest Service road and trail bridges are constructed of wood or have wood as a major component. The number constructed each year fluctuates with the...

Measured Performance of a Laboratory Culvert
This study shows that the behavior of a soil culvert system can be modeled by a linear finite element program and a mathematical solution of a hole in an elastic sheet reinforced by a...

Flexural-Torsional Stability of Curved Beams
General fourth order coupled differential equations are presented to determine the elastic buckling loads of in-plane as well as out-of-plane buckling modes of spatial thin-walled curved...

Channel Design to Minimize Lining Material Costs
A direct algebraic technique is developed to determine open channel cross-sectional designs which minimize lining material costs when base and side wall unit costs are different. Solution...

Composite Beams with Web Openings: Design
A general method for the analysis and design of composite steel-concrete beams with openings centered in the web of the steel section is developed. The approach is based on ultimate strength...

New Evapotranspiration Crop Coefficients
Improved crop coefficients for various Pacific Northwest irrigated crops were developed for estimating crop evapotranspiration (ET) from estimates or measurements of reference ET. Reference...

Managing Salinity in Irrigated Agriculture
Excessive accumulation of salts in soils and ground water has plagued the irrigated semiarid and subhumid regions of the world for centuries. The structural measures of salinity control...

Biomass as Alternative Energy Source
The potential for biomass utilization as a source of fuel, petrochemicals and petroleum-sparing substances is reviewed. The choices for cultivating biomass, utilizing it directly as an...

Estimating Underground Power Station Costs
Planners involved in evaluating pumped-storage alternatives found the capital cost of the underground powerstation directly related to the installed capacity. Estimates for three underground...

Dynamic Formula for Pressure Injected Footings
The mathematical derivation of a dynamic pile-driving formula for the installation of Pressure Injected Footings (Franki Piles) is presented. The usefulness of such a formula, despite...

Dilution Analysis for Undirectional Diffusers
The paper discusses the mixing mechanics of submerged, multi-port diffusers used to discharge heated water from steam-electric power plants into shallow receiving waters. An analysis for...

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...

Effective Stress Capacity Model for Piles in Clay
Several rigorous, theoretical methods, using effective stress concepts, have been developed in the last five years to predict the ultimate shaft friction on piles supported in clays. The...

Well Hydraulics in Vertically Heterogeneous Formations
Comparative analysis of time-dependent drawdown alterations caused by the heterogeneous properties of stratified formations is given based on solutions developed under different assumptions...

Fluvial Hydraulics of Deltas and Alluvial Fans
Delta formation and its associated steam channel hydraulics have been studied using data obtained in a large laboratory flume. The findings for deltas are generally applicable to alluvial...

Planar Strength of Restrained Beam Columns
A theoretical method that describes the planar, elastic-plastic behavior of a beam-column loaded at the ends and along the length is described. The theory considers the three important...

Tornado Technology and Professional Practice
Advancements in tornado technology make it possible to plan and design for the tornado. Tornado proof designs are being employed in the nuclear industry and in the design of shelters....

 

 

 

 

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