NDE for Steel Bridges: FHWA Research, Past, Present and Future
Over the last two decades the Federal Highway Administration (FHWA) has sponsored numerous research and development projects in the area of nondestructive evaluation of steel bridges....
AISI-FHWA Model Bridge Test
The Model Bridge Study involved a large experimental test program to evaluate the behavior of a 0.4-scale model of a two-span continuous plate-girder bridge with modular precast prestressed...
Horizontally Curved Steel Bridge Research-Update 2
Theory and data necessary for the development and calibration of an LRFD based curved steel bridge specification do not presently exist. To address these needs, the Federal Highway Administration...
Time-Dependent Load-Distribution Behavior of Parallel-Member Wood Systems
The effect of differential member creep on the load-distribution behavior of parallel-member wood systems is examined. Variability in the creep response of the individual component members...
Instrumentation and Testing of a Three Hinge Arch for Service Loads Increase
A three hinge arch railroad bridge was instrumented and tested to evaluate its condition and the required modification for increasing the service loads. Initially the structure was designed...
Field Tests of Railway Bridges
A research program focused on the evaluation of railway bridges has been underway for the past five years. The objectives of a research are as follows: (1) determine the loading spectra...
Condition Assessment of Highway Bridges
An application of modal testing and structural identification in the condition assessment of bridges is presented. Damage definition and conceptualization is discussed. Damage detection...
Cyclic Behavior of Joints Between Steel Beams and Reinforced Concrete Columns
The design and behavior of composite beam-column joints for seismic design are reviewed based on the results of tests. Issues addressed include the strength, deformation, and toughness...
Design Implications of Advanced Analysis in LRFD
This paper discusses two advanced analysis methods, and their use in LRFD format. The first approach is called the notional load plastic hinge method and the second is called the second-order...
Towards Robust, Effective and Efficient Second Order Analysis of Practical Steel Frames
The performance of the widely used finite element and the stability function methods and the recently developed pointwise equilibrating element in second order nonlinear analysis of framed...
A Nonlinear-Analysis-Based Procedure for Evaluating Load-Carrying Capacity of In-Plane Steel Frames
A simple method based on geometrically nonlinear analysis is proposed to evaluate the load-carrying capacity of a steel structure. The effects of material nonlinearity and residual stress...
Seismic Study of a Cable-Stayed Bridge
The focus of this paper is to investigate the non-linear and linear behavior of a cable-stayed bridge in a seismic environment. Three design features of a cable-stayed bridge are studied:...
Seismic Analysis of Failure and Loss of Function of Water Pumping Facilities
Water company managers evaluating potential seismic damage effects on a pumping facility will require a reasonable estimate of the probable magnitude earthquake that has potential to disrupt...
Seismic Issues in Structural Engineering Codes and Practice
It is necessary that we view the seismic events in an overall probabilistic mode and determine the criteria for acceptable damage at various levels of service in the building. We need...
Seismic Response and Retrofitting of Non-Ductile Reinforced Concrete Bridges
The Interstate I5/I605 Separator in Los Angeles County was severely damaged during the October, 1 1987 Whittier Narrows Earthquake. This damage included non-ductile shear failure in the...
Seismic Upgrades Using Energy Dissipation Devices
This paper presents a model for developing comparative seismic rehabilitation schemes for essential facilities using both conventional techniques and passive control devices. Essential...
Implementation of Passive Energy Dissipation Systems in the United States
Significant advances in the field of passive energy dissipation for improved structural seismic resistance have been made in recent years. Developments in research and analysis techniques...
Utilizing Visco-Elastic Dampers in the Seismic Retrofit of a Thirteen Story Steel Framed Building
A 13 story steel framed building in Santa Clara Country, California exhibited strong beating effects (torsional coupling) and prolonged building response as result of various seismic events....
Hi-Tech Seismic Rehabilitation of `Casino De Montreal'
The existing eight-story steel structure, built during 1966, lacked in lateral earthquake resistance and ductility requirements of the current building code. Introduction of friction-dampers...
Acoustic Emission Monitoring of Fatigue Crack Growth in HSLA-80 Steel Box Beams
An acoustic emission is a transient elastic wave generated by the rapid release of energy from a localized source within a material. There can be many sources of acoustic emission in a...
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