A Higher Profile
After an extensive inspection revealed severe corrosion to the substructure of a low-lying bridge over salt water in Norfolk, Virginia, engineers devised a retrofit that included vertical...
Twin Crossings
The Hungerford Bridge actually comprises twin pedestrian bridges that are being constructed on either side of an operational 19th century railway bridge over the River Thames in London....
The Viable Alternative
The Benicia-Martinez Bridge is a high-level, welded deck truss bridge that carries Interstate 680 over the eastern end of the Carquinez Strait near San Francisco. To bring the bridge into...
Substructures Stack Up (Available in Structural Engineering Special Issue only)
As part of a 1997 research project sponsored by the Texas Department of Transportation and the Federal Highway Administration, the University of Texas at Austin Center for Transportation...
Sizing Up Seismic Bearings
Today in the U.S., there are two general technologies available to protect new and existing bridges from the damaging effects of earthquakes. One type, seismic isolation bearings, provide...
Innovative Design and Construction for Foundations and Substructures Subject to Freezing and Frost
This proceedings,
Object-Oriented Structural Analysis with Substructures
Computer-aided structural analysis is a mature field. However, recent research has produced advances in the areas of automated modeling, multi-processing, and programming techniques. The...
Stress Analysis in Concrete with Cooling Pipes
A substructure method of finite element analysis is adopted in this paper to simulate heat transfer and thermal stresses in a concrete dam. The massive concrete structure is cooled by...
Optimal Processor Mapping for Massively Parallel Finite Element Computations
The exploitation of massively parallel computer for finite element analysis requires efficient usage of processors as well fast speed. For example, the efficiency of a parallel matrix...
Response of Mono-Coupled Distributed Parameter Systems to Random Excitation
The random vibration of periodic structures consisting of a multiplicity of closely coupled distributed parameter substructures is addressed. The problem formulation is general, and the...
Sprayed-Zinc Galvanic Anodes for the Cathodic Protection of Reinforcing Steel in Concrete
Corrosion of reinforcing steel bars (rebars), due to penetration of chloride ions from seawater affects the substructure of many bridges in marine service. In a new, low cost control method,...
Building Beneath Boston
Up/down construction is a method in which a project's substructure and superstructure are simultaneously built. The substructure's wall, column and foundation...
A Substructuring Algorithm for Analysis and Optimization of Large Structures on Parallel Machines
An efficient substructuring algorithm is presented for analysis and optimization of frame structures on parallel machines. The underlying concept is to pre-process the input data in such...
A Family of Concurrent Algorithms for Transient Finite Element Solutions
We derive a family of methods for solving the equations of motion arising in structural dynamics which makes effective use of the architecture of concurrent computers. The algorithm is...
A Modal Coupling Procedure for Structural Dynamics
A method is presented for synthesizing the real modes of substructures to obtain the complex modes of the combined structure. These complex modes properly include the nonclassical damping...
Interactive Design of Reinforced Concrete Foundations
A new, highly graphical foundation design program, FOUNDATION-3D, provides the designer with a variety of easy to use foundation design tools in a flexible interactive environment. It...
Finite Element Analysis of Structural Details in Large Steel Bridge Superstructures
Various approaches for the finite element modeling of the connection details in large steel bridge superstructures are presented. It is noted that an accurate analysis of these details...
Design of Guideway Substructure Dada County METROMOVER
This paper describes the procedures and parameters used for the design of the guideway substructure for the Dade County METROMOVER system. The substructure for this work is defined to...
Design of Bridges for Ice Forces
Sources of knowledge on ice forces and ice effects on bridges are listed and discussed briefly. Comments are made on experience of damage by ice and on the influence on bridge costs of...
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