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...
Design
This chapter discusses guyed structure design. Topics include loadings and design restrictions; guy clearances; guy design; guy anchorage; connections; structural design of poles and H-frames;...
Seismic Solutions for Steel Frame Buildings
After the Northridge Earthquake, damage in steel moment resisting frame connections stunned engineers. Now those engineers are scrambling to find and test new kinds of connections. This...
Spotlight on Steel Moment Frames
Engineers' confidence in moment connections was shattered when damage was discovered after the 1994 Northridge earthquake. Such connections are now a hot subject for U.S....
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...
Northridge Postscript: Lesson on Steel Connections
Immediately after the Northridge earthquake in January 1994, the general concensus was that steel-framed buildings performed extremely well. Later, inspectors were surprised to find weld...
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...
Behavior of Bolted Joints in 3-D Braided Composites
As composites are used more as replacements for metals in space structures, the question arises as to the most efficient way to join the components. Mechanical fasteners are a common joining...
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...
Debating Steel - Connection Design
The debate about responsibility for structural-steel-connection design is among the hottest engineering disputes of our generation. Meetings have been held on the subject, articles written...
Moment-Rotation Behavior of Pultruded Beam-to-Column Connections
Presented are experimental details and results of five tests carried out to study the moment-rotation behavior of flange cleated connections for frames of pultruded members. The full-sized...
Seismic Behavior of Type PR Steel Frames
Type PR(partially restrained 'simple framing') is one of the methods of design specified in the AISC LRFD(1986) Design code for the design of unbraced steel building frames. In this method...
The Effects of Bolt Over-Tightening on Bolted Connections
This paper describes a portion of the research program being conducted on structural connectors which have been over-tightened. Direct-Tension Indicators (DTI) may be specified for use...
Investigating the Behavior of a Lattice Structural Section
Tests were conducted on a fully instrumented lattice section assembled using various connection types (bolted or welded). The results of this study show that bolt slippage can have a major...
Modelling of Extended Endplate Bolted Connections
A methodology based on finite element modelling is examined to study the behaviour of extended endplate bolted connections. ANSYS (Rev. 4.4), a large scale finite element program is used...
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