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Research Program to Develop and Validate Conceptual Models for Flow and Transport Through Unsaturated, Fractured Rock
As part of the Yucca Mountain Project, our research program to develop and validate conceptual models for flow and transport through unsaturated fractured rock integrates fundamental physical...

The Adoption of Mechanized Excavation Techniques for the Superconducting Super Collider
The Superconducting Super Collider (SSC) is the latest and largest in a line of high-energy physics accelerator projects. The five increasingly energetic accelerators which make up the...

Principles of the NATM and Other Uses of the Geologic Monitoring Techniques
The NATM (New Austrian Tunneling Method) differs in several respects from other construction methods. Also referred to as the 'sequential support method' or the...

Risk Assessments for the Design of Subsurface Openings
A probabilistic approach was introduced to assess the risk of structural instability due to rock joint systems in rock mass, where subsurface openings are excavated, such openings as shafts,...

GA-4/GA-9 Honeycomb Impact Limiter Tests and Analytical Model
General Atomics (GA) has a test program underway to obtain data on the behavior of a honeycomb impact limiter. The program includes testing of small samples to obtain basic information,...

Estimating Geochemical Behavior of Cocnretes to be Placed at Yucca Mountain
The interactions of J-13 water with cementitious materials were examined at 25?C using the geochemical code EQ3NR/EQ6. Results of the modeling suggested the following conclusions: (1)...

Development of a Pavement Design Expert System
The latest edition of the Guide for Design of Pavement Structures was published by the American Association of State Highway and Transportation Officials in 1986. This edition of the Guide...

Knowledge Representation for Bridge Design
An implementation of a frame-based knowledge representation language (KRL) for development of expert system applications in highway bridge design is presented. The frame-based KRL is used...

Optimized Models for Predicting Structural Response in Highway Bridges
Optimization techniques are a viable option for modeling bridges that have been field tested. The error between the experimental strains and the analytical strains is minimized by adjusting...

Knowledge-Based Expert System Applications to Lateral Earth Support Structures
Knowledge-based expert systems (KBES) are computer programs, based on artificial intelligence (AI) techniques, designed to reach the level of performance of a human expert in some specialized...

A Prototype of the Uniform Building Code Using Hypertext
The earthquake section of the Uniform Building Code has been implemented using the hypertext technology. The information was broken down into many interrelated nodes. Figures were scanned...

A Mechanical Strength Critic for a Simultaneous Engineering Design Environment
Critic-based design systems are systems whose architecture consists of a central synthesis module responsible for initiating design decisions and a set of independent asynchronous modules,...

Visualizing the Performance of Structural Optimization Processes
Graphical constructions are discussed that enable the performance of iterative structural optimization processes to be evaluated visually. The first, a basins of attraction construction,...

Computer-Based Interactive Design for Prestressed Concrete Structures
Prestressed concrete structures can provide a highly desirable solution for many structural applications because the designer gains control over several additional parameters as compared...

A PC-CAD System for Prefabricated Steel Bridges
A microcomputer-aided analysis and design system for prefabricated steel bridges is presented in this paper. The system was customized to perform all the required engineering to analyze,...

Prestressed Concrete Bridge Design and Optimization
The computer program described here analyzes simple span highway bridges for any AASHTO live load, generates girder and slab dead loads, performs the analyses for maximum moments and shears,...

Integrated Structural Engineering Solution for Design, Drafting and Analysis
Computervision Corporation is a leading CAD/CAM/CAE vendor that offers a complete integrated structural solution to customers. This structural solution allows customers to manage intricate...

Integrated Structural Design Software in the IBM Architecture & Engineering Series
The Architecture and Engineering Series (AES) software by IBM is a high function, fully integrated design, drafting, and information system. The system provides three dimensional geometry...

Integration of CAD and Structural Engineering for Building Design
Many design/build contractors have publicized successes using three-dimensional (3D) computer-aided-design (CAD) models. Structural engineers contribute equipment support structures as...

Computer-Aided Structural Analysis
Finite Element Methods and other numerical techniques are often taught nowadays in the undergraduate Structural Analysis courses. Commercial, structural computer programs are becoming...

 

 

 

 

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