Creative Connections: Bridges as Art
Princeton University professor of civil engineering David P. Billington, at the invitation of civil engineering professors at Tokyo University, tours Japan and critiques several of the...

The Next Earthquake
The California's October 1989 Loma Prieta earthquake confirmed must of the current research and practice about structural engineering and seismic events. It also highlighted...

Exploratory Shaft Facility
This paper is an overview of engineering and concept development for the Exploratory Shaft Facility (ESF) of the Yucca Mountain Project. The paper presents a general description of the...

Rock Mechanics Aspects of the ESF Design
Selected aspects of the ESF rock mechanics design are outlined with emphasis placed on specific requirements imposed on the design process conducted within quality assurance-controlled...

Preliminary Methodology for Design of Stable Drifts for the Yucca Mountain Project
The Yucca Mountain Project is investigating the feasibility of locating a high-level radioactive nuclear waste repository at Yucca Mountain, Nevada. The conceptual design of the repository...

Incorporating Seismotectonic Data into Seismic Hazard Analyses
A wide range of seismotectonic data are now being incorporated into probabilistic seismic hazard analyses, supplementing the inadequately short historical seismicity record. This paper...

Kinematic Models of Extensional Structures: Seismic Implications
Kinematic models can relate faults of different types and different positions within a single dynamic system and thereby offer the potential to explain the disparate seismic activity characteristic...

Approach to Developing a Ground-Motion Design Basis for Facilities Important to Safety at Yucca Mountain
The DOE has proposed a methodology for developing a ground-motion design basis for prospective facilities at Yucca Mountain that are important to safety. The methdology utilizes a quasi-deterministic...

Estimating Earthquake Sizes in the Basin and Range Province, Western North America: Perspectives Gained from Historical Earthquakes
Thirty eight historical earthquake from the Basin and Range province were used to examine three aspects of earthquake size and behavior: 1) the maximum background earthquake, 2) earthquake...

Preclosure Safety Analysis for a Prospective Yucca Mountain Conceptual Design Repository
A preliminary probabilistic risk assessment was performed for the prospective Yucca Mountain conceptual design repository. A new methodology to quantify radioactive source terms was developed...

The Application of Vertical Seismic Profiling and Cross-Hole Tomographic Imaging for Fracture Characterization at Yucca Mountain
In order to obtain the necessary characterization for the storage of nuclear waste, much higher resolution of the features likely to affect the transport of radionuclides will be required...

Seismic Characterization of Fracture Properties
Laboratory measurements of the mechanical stiffness, hydraulic conductivity and seismic properties of three natural fractures were made as a function of applied normal stress. Seismic...

Actively Controlled Optimum Structural Design
This paper deals with the investigation of the number and location of actuators and sensors on the optimum structure and control design of space structures. The optimization problem is...

An Introduction to Pressurized Volumes in Space
Space habitation designers come from diverse backgrounds. As it is human nature to emphasize that which is familiar, habitat design is strongly influenced by the designer's...

Conceptual Design for a Lunar-Base CELSS
Future human exploration is key to the United States National Space Policy goal of maintaining a world leadership position in space. In the past, spacecraft life support systems have used...

Artificial Gravity Research Facility Options
On a long duration manned mission to Mars, the physiological changes caused by microgravity may be counteracted by artificial gravity. This paper evaluates several different classes of...

Partial Gravity: Human Impacts on Facility Design
Partial gravity affects the body differently than earth gravity and microgravity environments. The main difference from earth gravity is human locomotion; while the main difference from...

A Design Process for Water Distribution Systems Including Optimization
Design of a water distribution system is a multi-level process from preliminary planning to final detailed sizing of components. Unfortunately as in many design problems, a final detailed...

Upgrading Hydraulic Infrastructure for Level One Redundancy
In the current paper a methodology is presented for upgrading any single source water distribution system in order to provide a level one system redundancy at a minimum cost. A level one...

Soft Bottom Low Flow Channel?A New Approach
In 1987, the City of Boulder, Colorado requested assistance from the Urban Drainage and Flood Control District (District) to repair a problem of cattails growing in the low flow portion...

 

 

 

 

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