Advanced Fracture Control Procedures for Deepwater Platforms and Compliant Towers
This paper describes an integrated approach to fracture control problems � applied first as a necessary adjunct to the authors' own engineering practice, then in developing...
Offshore Platform Steel Specification
The discovery in the 1980's of local brittle zones (LBZ's) in and near the heat-affected zone (HAZ) of the fabrication welds in certain offshore platform steels...
Design and Installation of Auger Steel Catenary Risers
The Auger export pipelines are connected to the TLP by steel catenary risers (SCRs). This is believed to be the first time steel pipe has been used for catenary risers. SCRs offer advantages...
Ahead of the Curve
Four curved steel girder bridges for Pittsburgh's light-rail project posed challenges ranging from multiple site constraints to special rail loads and welded rail interactions....
Competitive Edge
A new design system called the simplified economical bridge design (SEBD) makes steel cost-competitive with concrete for short- and medium-span bridges for the first time. In fact, a comparative...
Evaluation of KeySystem I Retaining Wall
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF Innovation Center. This report describes an evaluation to determine...
Holding Court
Contractors had their work cut out for them when structural engineers specified concrete-filled steel tubes for the Thomas F. Eagleton Federal Courthouse's perimeter columns....
On the Wild Side
Designers of today's roller coasters are constantly looking for new ways to exhilarate riders, from higher drops to tighter turns to launch mechanisms that exert more force...
Evaluation of the SSL MSE PlusTM Retaining Wall System
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF service center. This report describes a HITEC evaluation designed to...
Making the Grade
A new grade of high performance steel, HPS-70W, allows engineers to design tougher, lighter structures. The high performance weathering steel has a yield strength of 70 ksi, or 485 MPa....
Corrosion Control
As pipe systems with nonwelded joints have become more common, so have problems with corrosion. It's up to designers to carefully consider corrosion issues in order to avoid...
Dampers Do the Job at Davis (Available only in Structural Engineering Special Issue)
Three recent earthquakes�the Kobe earthquake in Japan and the Loma Prieta and Northridge earthquakes in California�have caused engineers to take a much more serious approach to seismic...
Prelude to a Demolition
Building demolition conjures up images of explosives detonating or a wrecking ball haphazardly slamming into the side of a structure until it's reduced to a pile of rubble....
The Northridge Fractures: Are We Learning the Right Lessons?
After the Northridge earthquake in January 1994, engineers found problems with special moment-resisting frames. There were multiple facture modes, and typical damage involved primary crack...
Ready for Anything
The author describes the temporary bridge developed by Caltrans for use in emergency situations where stretches of highway bridge are damaged. The bridge is made of salvaged railroad flatcars...
URSULA: Design of an Underwater Robot for Nuclear Reactor Vessel Inspection
This paper describes the development of an underwater robotic system that will be used to perform ultrasonic inspections of nuclear reactor vessel weldments. The development effort consists...
Construction of Large Lunar Structures by Fusion Welding of Sintered Regolith
Regardless of material used, construction of large lunar structures using indigenous resources is likely to requires joining of simple blocks or pieces. Fusion welding using an optical...
Focusing on Fatigue
Properly designed and maintained bridges sometimes need repair for fatigue damage. Among the reasons may be that the bridge was designed before current fatigue design provisions, or initial...
Long Life Fatigue Behavior of Welded Steel-Bridge Girder Details
The Federal Highway Administration is nearing completion of a five year, 1.5 million dollar effort titled 'Variable Amplitude Load Fatigue' to investigate the behavior of welded bridge...
Behavior and Design of Angle Connections Subjected to Cyclic Axial Force and Shear
The objectives of this study were to establish cyclic behavior of double angle shear connections subjected to axial load and to develop design recommendations. Five cyclic tests of double...
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