Diatomaceous Soils: A New Approach
Diatomaceous soils are formed over long periods of time when the skeletal remains of plankton and other single-celled marine creatures sink and accumulate in lakes, estuaries and oceans....
Fabric Meets Cable
The newest generation of fabric-roofed stadiums are cable domes designed by David H. Geiger of Geiger Gossen Hamilton Liao Engineers, New York City. He also uses the term tensegrity coined...
Orchestral Maneuvers
Symphony Towers is an H-shaped superstructure that straddles Symphony Hall in downtown San Diego. The $143 million project is a 34-story office building to the south of the hall and a...
Local Buckling Behavior of Plate Elements
In the elastic post-local buckling range, the stress distribution across the width of compression elements of light gauge steel shapes is nonlinear. For code implementations, these stress...
The Design of Diagonal Cross-Bracing
The results of an analytical and experimental study on the behavior of simple and double diagonal cross-bracings in vertical stiffening trusses and in built-up open web beams are presented...
Brace Behavior in a Structural Steel Seismic Retrofitting Scheme
A two thirds scale non-ductile reinforced concrete frame strengthened by an external structural steel bracing scheme was constructed and tested in the laboratory. The frame was subjected...
Seismic Behavior of Built-Up Bracing Members
The influence of stitch design and local buckling on the seismic behavior of welded bracing members made of double angles is studied in this paper. Performance of boxed configuration with...
Seismic Response of Flexibly-Connected Steel Frames
The response of typical low-rise steel building frames designed by the 'Type 2 Construction' method to moderate earthquakes is examined. Such frames are often...
Tests on Brace and Link Connections for EBFs
This paper describes recent test results on the behavior of selected connections for seismic-resistant Eccentrically Braced Frames (EBFs). These tests provided data on the performance...
End Plate Moment Connections for Cyclic Loads
Three pilot tests of full size end plate moment connections under cyclic loading are discussed. In one of the specimens, the premature fracture of one of the inner bolts suggests the possibility...
Manipulation of Shell and Fabric Structure Form
Fabric structures and concrete shells are readily compared because of their curving shapes and the apparent structural derivation of their forms. Every fabric structure includes compression...
Optimal Location of Active Controllers Subjected to Seismic Excitation
In the application of structural control to seismic structures certain locations are advantageous for placement of the actuators. These locations reduce the structure's response...
BABE: An Expert System for Structural Design of Bridge Abutments and Piers
A knowledge-based expert system named 'BABE' (Bridge and Building Evaluation) has been developed for the purpose of helping the user in planning, analysis and...
An Integrated Knowledge System of Seismic Vulnerability and Risk for Engineered Facilities
This paper describes an integrated knowledge system for the assessment of the seismic vulnerability and risk of engineered facilities. The system integrates knowledge from many fields...
A Knowledge Based System for Deriving Qualitative Seismic Behavior
The analysis and design of complex or critical facilities, such as tall buildings, nuclear power plants, offshore structures, or cable stayed bridges requires that these facilities be...
A Knowledge-Based System for Evaluating the Seismic Resistance of Existing Buildings
The large number of existing buildings designed without considerations of seismic loading warrants the development of computer aids for the evaluation of their seismic resistance. Since...
High Strength Concrete: Proportioning, Behavior and Applications
Generally, concrete with a cylinder compressive strength higher than 6000 psi (41.4 MPa) is designated as high strength concrete. High strengths are achieved using stronger coarse aggregates,...
Testing of Reinforced Concrete Bridges for External Reinforcement
Several continuous reinforced concrete slab bridges were constructed in the 1950's with spans ranging from 30 ft. to 60 ft. Longitudinal cracks were observed in the tension...
Sulfate Attack on Concrete Containing Fly Ash
The use of fly ash as a portland cement replacement in concrete may provide many technical and economic advantages. One such technical advantage is to improve the resistance of concrete...
Fatigue and Fracture Evaluation of Riveted Bridge Members
Among the major concerns of bridge engineers today are the fatigue damages that have been accumulated in riveted members and the safety of riveted structures. Many of these structures...
Return to search