Incremental Assembly Stage Concepts for Space Station Freedom: Structural Design and Verification
The design and development of the U.S./International Space Station Freedom poses extreme technical and management challenges to the NASA/industry team. A comprehensive system engineering...

Reliability Consistent Load and Resistance Factors
A practical algorithm to find the partial safety factors consistent with target reliability in LRFD format is proposed. The method is based on Second Order Second Moment method and Reliability...

Reliability Assessment of Pressurized Fuselages with Multiple-Site Fatigue Cracks
Multiple-site damage could cause a catastrophic structural failure of aged aircraft. A reliability analysis is proposed for an assessment of the capability of visual inspection on multiple-site...

A Reliability Analysis of Aerospace Structures Subject to Thermal Mechanical and Flight Loads
Aerospace structures are subjected to various flight loads throughout their service life. In certain anticipated missions, significant thermal stresses will be generated through atmospheric...

Monitoring Vibration
Vibration monitoring for construction projects is increasing rapidly. Instrumentation for measuring structural response to blasting began in the mining industry with research by the U.S....

Pipeline Leak Detection and Location
A real time pipeline leak detection and location system has been developed. This system consists of a numerical model for transient flow, two sets of pressure and flow measurement equipment,...

Geometrical Nonlinearity in Offshore Pipelines
Pipelines are very flexible structural systems which are subjected to various boundary conditions. For instance, during the laying process, the pipes roll on the guidance tracks on the...

Whatever Happened to Long-Term Bridge Design?
The Chairman of the Board of one of the leading engineering firms in the nation ponders the future of American bridges. In today's designing of bridges, Thomas R. Kuesel points...

Failure of Prestressed Concrete Embedded Cylinder Pipe
In 1964, the Ontario Provincial Government undertook to supply water to the City of London (current population 300,000). The supply source was from Lake Huron near Grand Bend, Ontario...

Measured Performance and Numerical Analysis of Buried Pipe
This study shows that the behavior of a soil pipe system can be assessed by a nonlinear elasto-plastic finite element analysis. The results of numerical calculations are compared to the...

Design of Drainage Pipes Below Landfills
Drainage pipes are an essential component of landfills. Even though their embedment conditions differ substantially from those of pipes for municipal utilities near the ground surface,...

FE Elastic Analysis of Measured Earth Pressure on Buried Rigid Pipes in Centrifuged Models
FE elastic analyses of earth pressure on buried rigid pipes yielded results that agreed well with the earth pressure measured in 42 centrifuged models, confirming both the reliability...

The Effect of Compaction on Buried Flexible Pipes
This contribution presents an analysis of the installation of flexible pipes in granular soil. The deformation of the pipe cross section is measured in field and laboratory tests. It is...

A Look Back in Time to Verify Life Cycle Cost Analyses
The proper engineering design of any hydraulic structure requires consideration of different but interrelated fields of: 1) Planning, 2) Hydrology, 3) Hydraulics, 4) Structural, 5) Installation,...

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...

Optimal Route Selection for High Level Nuclear Waste Transport Based Upon Radiological Risk
The purpose of this paper is to demonstrate route optimization based directly upon the minimization of radiological risk as computed from local conditions. An operational impact analysis...

PAGIS & PACOMA: Performance Evaluations of Deep Geological Disposal. Results and Conclusions
Two coordinated research projects were undertaken by the Commission of the European Communities to study the safety performances of geological radwaste disposal systems in the post-operational...

Evaluation of Near-Field Thermal Environmental Conditions for a Spent Fuel Repository in Tuff
A repository heat transfer analysis is being performed by the Pacific Northwest Laboratory (PNL)a for the U.S. Department of Energy's...

Technical Considerations and Approcah for Evaluating Substantially Complete Containment of High-Level Nuclear Waste
The current Federal Regulations, Title 10 Part 60.113(a)(1)(i)(A) require that, for at least 300 years, nuclear waste containment within a waste package shall be substantially complete....

A Numerical Study of Some Effects of Nuclear Fuel Waste Vault Construction and Closure on Evolution of Groundwater Flow Paths in the Geosphere
We have performed a series of three dimensional finite-element simulations on the sensitivity of the groundwater flow paths and travel times in a conceptual hydrogeological model with...

 

 

 

 

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