Microtunneling: No Pipe Dream
Microtunneling machines developed in Japan and Germany can help install pipes, ducts and cables without disrupting urban activities at street level. A microtunnel is defined as having...
Seismic Response of Pipes Supported on Complex Frames
Analytical approaches and modeling techniques used to calculate seismic responses of piping systems, supported on complex open-frame structures, are evaluated. Seismic responses are obtained...
Study of the Collapse of a Reinforced Concrete Model Structure Under Simulated Earthquake Motion
The collapse, under simulated earthquake motion, of a multistory r/c frame structure with columns flexurally weaker than beams (SBWC) is studied. A small-scale model, comprising parallel...
Factory Chic
Developers of the International Design Center of New York have recently spent $163 million to convert an unused chewing gum factory and a former battery plant into a showcase for New York...
RCC: A Dam Rehab Solution Unearthed
Roller compacted concrete (RCC) is fast becoming a popular material for the rehabilitation of existing dams. Several dams have already been rehabilitated using RCC, and several more RCC...
Computer Assisted Pavement
In Rancho Palos Verdes, Calif. a 4,300 ft. long test installation of the Contained Rock Asphalt Mat (CRAM) Pavement System is expected to have a 50 year life. It cost a third less than...
Structural Applications of SIFCON
SIFCON (Slurry Infiltrated Fiber CONcrete) is a relatively new composite material utilizing steel fibers in a cement-based matrix. It differs from conventional steel-fiber-reinforced concrete...
Behavior of Concrete Bulkheads in Salt Drifts
Parameters studies of the behavior of a plug made from expansive concrete have been performed. Such plugs are now being field tested for sealing boreholes, shafts and drifts at an underground...
Timber in Bridges of West Coast
Experience has shown that timber can function very well as a bridge material. Proper inspection procedures combined with a structured maintenance program can improve the performance of...
Delamination and Remedial Repair of GFRC Cladding Panels
The construction of a six story, steel framed office structure included an exterior cladding of prefabricated glass fiber reinforced concrete (GFRC) panels. The typical full-size panel...
Structural Monitoring Concepts for Arctic Pipelines
Terrain instabilities producing differential soil movements are the predominant features affecting the structural integrity and design of buried pipeline systems in the arctic. Current...
Knowledge-Based Consultant for Construction Inspection
This paper shows how knowledge-based expert systems can be implemented in construction inspection to provide the necessary information needed by an inexperienced inspector to inspect complex...
Rehabbing Research
Because a growing share of Corps of Engineers' effort is going int rehabilitation, likewise a growing share of its research is too. This shift in emphasis is encouraged by...
Microcomputers and Design Codes: A Case Study
A microcomputer analysis of the thermal stress problem in reinforced concrete box sections was conducted. An explicit finite difference algorithm for a one-dimensional heat flow analysis...
Knowledge Bases for Multistory Concrete Buildings
Heuristics are used in the concrete building industry. A knowledge base is developed with heuristics used in the selection of the floor framing system of a concrete building....
Expert System for Risk Assessment of Concrete Dams
An expert system is presented that will assist a field inspector, during the site investigation of an existing concrete dam, to perform a preliminary structural risk assessment of the...
Pattern Recognition Techniques for Distinguishing Structural Failure Modes from High Pressure Loading Records
Pattern recognition techniques have been successfully employed in a wide variety of fields, such as geophysical exploration, medical diagnosis, radar tracking, and earthquake structural...
Best Management Practices Overview
In the general list of best management practices for stormwater control, many practices are currently being used. On-line retention and detention ponds are used frequently and their importance...
Finite Element Analysis of Reinforced Concrete Structures
The 40 papers included in this publication were presented at the Joint U.S.-Japan Seminar on Finite Element Analysis of Reinforced Concrete. Two state of the art reviews discuss the role...
Sunshine Skyway Nears Completion
The new Sunshine Skyway Bridge over Tampa Bay in Florida replaces an older structure that had been severely damaged when a ship rammed it during a 1980 storm, taking 35 lives. Its central...
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