Tiedback Walls Untie Intersection
The intersection of Gallows Rd. and Arlington Blvd. in Virginia's Fairfax County required separation. Tiedback retaining walls, which required only 18 in. instead of the 18-22...
Spanning Urban Obstacles
Extension of Pittsburgh's Crosstown Expressway is a � mile portion of a massive $500 million urban highway now under construction. The extension is a complex of five roadways...
Scenic Squeeze
Constructing a four-lane dual highway through the 12 miles of Colorado's Glenwood Canyon involves several engineering innovations: cantilevered roadways, unusual retaining...
Demands for Innovation in Power Construction
This paper identifies some specific demands for innovation on power projects, reviews the alternatives considered to meet project objectives, and describes the resulting innovations. Examples...
Attaching Steel Members to Reinforced Concrete Elements
A variety of structural systems have been devised to strengthen existing buildings for improved seismic resistance. Strengthening methods currently in use for reinforced concrete structures...
Design of an Expert System for the Rating of Highway Bridges
A microcomputer-based expert system used to determine the effects of vehicles and overloaded vehicles on simple span bridges with reinforced concrete deck and prestressed concrete I-beams...
RC Structures Under Severe Loads?An Expert System Approach
The authors propose the application of expert systems to the post-test assessment of specific structural systems. In the study reported, an existing expert system shell was employed and...
Pseudo-Dynamic Testing of Structural Components
The pseudo-dynamic testing procedure is a simultaneous simulation and control process in which inertia and damping properties are simulated and flexibility properties are acquired from...
Seismic Tests of Friction Damped Steel Frames
This paper presents the results obtained from qualification tests of a new friction damping system, which has been proposed in order to improve the response of Moment Resisting Frames...
Hysteretic Behavior of Composite Diaphragms
Floor systems constructed with steel-deck-reinforced concrete are described. When used to resist lateral loads these systems are referred to as diaphragms. A description of a test arrangement,...
Precast Roofs for Blast Shelters
A shallow-buried reinforced concrete blast shelter has been constructed and dynamically tested at the U. S. Army Engineer Waterways Experiment Station (WES). Three thicknesses of precast...
Cyclic Energy Absorption by Reinforced Concrete
Results are presented on the basis of experiments conducted on conventional and steel fibrous reinforced concrete beams. The effects of the amount and nature of steel reinforcement and...
Significance of Nonlinear Modeling of R/C Columns to Seismic Response
Columns in reinforced concrete (R/C) structures exhibit complex hysteretic behavior during earthquakes. This can significantly influence predictions of overall response and damage distribution....
Building Records from 1984 Morgan Hill Earthquake
The dynamic response of 23 structures instrumented by the California Strong Motion Instrumentation Program was recorded during the magnitude 6. 2 (ML) Morgan Hill earthquake of 24 April...
Use of Vibration Tests to Determine Lateral Load Paths in Medium Rise Buildings
A structural system identification procedure is described in which an initial analytical model of a building is modified until it predicts accurately the mode shapes and natural frequencies...
Behaviour of Full-Scale Reinforced Concrete Structure on Realistic Foundation
A full-scale seven-story reinforced concrete building, tested as a part of U. S. -Japan Cooperative Research Program, performed well even under a severe earthquake loading condition. Nonlinear...
Modeling 3-D Response in R/C Frame-Wall Structures
As part of the recent U. S. -Japan Cooperative Research Program on the seismic performance of buildings, a 1/5-scale model of a 7-story reinforced concrete frame-wall structure, was constructed...
Seismic Behavior of a Full-Scale K-Braced Steel Frame?Part I Gross Behavior
As a part of the U. S. -Japan Cooperative Research Program Utilizing Large-Scale Testing Facilities, a six-story, 2 by 2 bay, concentrically K-braced steel building was constructed in...
Seismic Behavior of a Full-Scale K-Braced Steel Frame?Part II Local Behavior
The full-scale six-story concentrically K-braced steel building was subjected to Miyagi-Ken-Oki simulated earthquake whose peak intensity was 500gal. Local behavior of the test building...
Earthquake Response Simulation Capacity of Pseudo Dynamic Testing?Experimntal Demonstration and Analytic Evaluation
The response accuracy of the pseudo dynamic test was evaluated from the shake table and pseudo dynamic tests conducted for a two story steel braced frame model. The obtained responses...
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