Nonlinear Behavior of Northlight Reinforced Concrete Shells
The behavior of northlight shells is very sensitive to the boundary conditions at the top and bottom edges of the shell. The aim of this paper is to investigate the structural action of...
The Structuring of a New Architectural Landscape
Structure plays an increasingly important role in the language of architecture design. Examples from the 2nd half of the 20th century, including transportation systems and buildings, sport...
Morphology of Reciprocal Frame Three-Dimensional Grillage Structures
This paper is an introduction to the morphology of structures using the Reciprocal Frame (also known as Mandala Dach in Germany) which is a patented three-dimensional beam grillage structural...
Recent Advances in Engineering Design Methodologies
The paper illustrates the mode of operation of the Engineering Design Research Center (EDRC) at Carnegie Mellon University by describing a number of EDRC projects related to structural...
Validation of a Continental-Scale Storm Surge Model for the Coast of Delaware
Coastal structures are designed to provide protection against various forces of nature acting in the coastal zone. Structures such as seawalls are expected to provide onshore protection...
EPA's Environmental Monitoring and Assessment Program: Availability of Broad-Scale Environmental Data and Opportunities for Use in Environmental Modeling Applications
The Environmental Monitoring and Assessment and Program (EMAP) has collected a suite of environmental data over a four year period from estuarine systems in the mid-Atlantic and Gulf of...
Analyzing Larval Fish Distributions Using Hydrodynamic and Transport Modelling
Port Moller is a major spawning ground for Pacific herring. Coincident with extensive larval sampling in the estuary, data required for simulating three-dimensional hydrodynamics and transport...
The Politics of Nuclear-Waste Disposal
Spurred by federal and state legislation recommending local disposal of low-level radioactive nuclear waste, the Illinois-Kentucky Compact announced plans in the mid 1980s to build a disposal...
Picturing Pollution
Kevin G. Coulton is a professional engineer and photographer who sees in the iridescent sheen of an oil slick on a rainy street a novel way to increase public awareness of water pollution...
Restoring the Everglades
Are constructed wetlands an effective management strategy for restoring and protecting the Everglades from phosphorus over-enrichment caused by agricultural stormwater runoff? The $13.85...
Federal Cleanups: Good News from Bad
Since the end of the Cold War the news about the Department of Energy has been grim: Thousands of acres poisoned with radioactive and toxic wastes, massive cleanup cost overruns due to...
NDBC Wave Data?Current and Planned
The National Data Buoy Center (NDBC) of the National Weather Service (NWS), operates a large number of buoy and fixed-platform environmental data reporting stations in geographical areas...
Implementing a National Wave Monitoring Network?Some Lessons and Plans
Most environmental problems involve a chemical and/or biological component and a physical processes component. A holistic approach must consider both components and the way they interact....
The TMA Wave-Energy Constraint and Cohesive Shore-Profile Shapes
A relation by Andreanov between wave-energy loss and nearshore slope, when combined with the TMA wave-energy constraint, is shown to closely approximate the classical Bruun/Dean shape....
Design and Testing of the NDBC Wave Processing Module
The U.S National Data Buoy Center (NDBC) has developed a new wave data acquisition and processing system, called the Wave Processing Module (WPM), using state-of-the-art technologies and...
Wave Attenuation at the Mobile Stable Berm
This paper describes work examining the ability of submerged berms to `filter' certain erosive wave energy while allowing accretionary type waves to pass unhindered. Analysis of wave data...
Getting the Project Started
In 1987, the newly formed Washington Metropolitan Airports Authority began a long term Capital Development Program which will change how both Washington National and Dulles International...
Airport Terminal Design Challenges
In February 1989, the Metropolitan Washington Airports Authority began the process of designing and constructing a new terminal at Washington National Airport to address the needs of its...
Dulles International Airport Construction Challenges
The expansion of the Main Terminal at Dulles International Airport was anticipated and planned for during the original construction of the building in 1962. The most difficult portions...
Utilization of Phosphogypsum-Based Slag Aggregate in Portland Cement and Asphaltic Concrete Mixtures
This study centers around the potential utilization of phosphogypsum-based slag aggregate as a substitute for coarse aggregate in both portland cement and asphaltic concrete surfaces for...
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