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Time-Dependent Behavior
This paper is a report of the material presented at the International Workshop on Finite Element Analysis of Reinforced Concrete, Session 4 - Time Dependent Behavior, held at Columbia...

Transit Times Through Compacted Clay Liners
Transit time, or time taken by waste liquid to move through the thickness of the liner, is a short-term performance parameter which can be used to determine the necessary liner thickness....

Robust Approach to Wave Runup Calculation
Wind wave runup on a natural beach is examined for the case of an irregular wave forcing function. A pragmatic approach to the calculation of the runup time series and the corresponding...

Shrinkage Measurements in Composite Beam Slabs
When the concrete slab on a composite beam shrinks, it is restrained by the steel beam to which it is connected. Tensile stresses, as a result, are developed in the restrained concrete...

Life in the Fast Track
Through innovative financing and skillful construction management, Oklahoma is proving that transportation megaprojects are still possible, even during an economic downturn. The result...

Automating The Corps
Automated soil testing machines solved several problems at once for the U.S. Army Corps of Engineers' South Western Division Laboratory in Dallas, Texas. The machines replaced...

Pattern Formation and Time-Dependence in Flowing Sand
The authors present results for a number of experiments on flowing granular materials and a novel cellular automata model for the flow of these materials when the grains are long and thin....

Investigation of Parametrically-Induced Excitation in Concrete Columns
A mathematical model is developed which accounts for the non-linear material characteristic of concrete members. The axial and transverse motions of concrete columns, are found to be second-order...

A Graphical Post-Processor for CE-QUAL-W2
A directly linked graphical post-processor has been developed for the Corps of Engineers' CE-QUAL-W2 (W2) Model. The post-processor allows the quick visualization and verification of the...

Load Duration and System Effects in LRFD for Wood Construction
The wood industry is developing a Load and Resistance Factor Design (LRFD) speciification for wood construction using probabilistic concepts. An analysis based on statistical models for...

The Use of Sophisticated Three-Dimensional Numerical Models in Weather Modification Efforts
Understanding of the complex interactions between the mesoscale and cloud environment and between microphysical and dynamical processes within clouds can be substantially increased with...

Predicting Water Demand in Agricultural Regions Using Time Series Forecasts of Reference Crop Evapotranspiration
Overall, it can be said that the time series model developed in this study did provide superior forecasting results for the Brawley, CA, site. This indicates that the monthly reference...

Streamflow Forecasting Using Trainable Neural Networks
In this investigation the practicality of applying a backpropagation neural network to modeling watershed response characteristics is examined. Two separate tests were performed. One test...

Wind Tunnel Modeling of Time-Dependent Drift Topography
The aeolian wind tunnel is a useful tool for investigating not only the saltation physics of wind-driven sand, soil or snow, but also for determining the time-dependent development of...

Preliminary Calculations of Release Rates from Spent Fuel in a Tuff Repository
Time-dependent release rates of Tc-99, I-129, Cs-135, and Np-237 have been calculated for wet-drip and moist-continuous release modes from the engineered barrier system of a potential...

Extracting Dynamics from Ocean Wave Time Series Data
Recent developments in chaotic dynamics have indicated that qualitative information of a dynamical system can be extracted from the observation of a single time series as the time series...

Three-Dimensional Blood Flows Associated with Intra-Aortic Balloon Counterpulsation
Three-dimensional blood flow processes associated with intra-aortic balloon counterpuslation (IABP) are calculated using a Cray YMP supercomputer. The mathematical model incorporates a...

Crack Growth Stability in Ice
The mechanics of stable, time dependent crack growth as a function of geometry and increasing crack length in saline an freshwater columnar ice are examined in this paper. Experimental...

A Time-Dependent Microplane Model for Creep of Cohesive Soils
The microplane model is used in this paper to describe the time-dependent (creep) behavior of cohesive soils (clays). The constitutive equations are defined on each of a set of microplanes...

Effect of Shell on Beach Performance: Examples from the West-Central Coast of Florida
Time-series analysis of beach profiles and sediment analysis along the Pinellas County coast of Florida over a 2-yr. period shows that shell abundance has an influence on beach performance....

 

 

 

 

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