Unbonded Performance
Unbonded single strand tendons have been used in the U.S. for about 30 years. In a small number of buildings, strand corrosion failures have occurred. Although it is clear that post-tensioning...
Epoxy Update
Epoxy-coated reinforcing steel protects against corrosion if it is used correctly. Several construction practices, such as prescribing the limits on permissible coating damage due to shipping...
Building Bridges the Old Way
Cast-in-place concrete bridges built on falsework, particularly post-tensioned box girders, are California's dominant structure type. Factors which have led to the popularity...
Federal-State Conflicts & A 12-Mile Territorial Sea
The growing tension between coastal states and the federal government can be lessened by amending the 1953 Submerged Lands Act to give coastal states a 12-mile territorial sea. For equitable...
Oil-Native Conflicts Solutions for the Beaufort Sea
Oil and gas development in Federal waters off Alaska has recently been stymied by litigation. Tensions have been increasing rather than decreasing and no development is taking place in...
Development of a Double Tee Structural System for Highway Bridges
The fully precast, prestressed double tee beams are tied together by transverse post-tensioning through simple grout filled V-joints. The system provides for complete transversal continuity...
Rehab Roundup
Four recent rehabilitation projects are described. On an old concrete gravity dam, post-tensioning tendons were added to improve its resistance to sliding. The abandoned Union Station...
Design of Tension Member Insulated Anchor for Arctic Pipelines
This paper explores the latest development in above-ground waterflood pipe anchors currently being used on the SOHIO operated portion of the Prudhoe Bay Oil Field. The objective of the...
Sheet Pile Interlock Behavior: A Moving Contract Problem
The finite element method is used to analyze the behavior of sheet pile interlocks subjected to an uniaxial pull test. The thumb and finger of the interlock provide three contact points...
The Public/Private Condo
A 20-story office building in Chicago was built on publicly owned land under a condominium arrangement that allowed a developer full ownership of air rights over and above the 100,000...
Soil Nailing a Wall
Soil nailing is the reinforced-earth idea (in which the earth must be backfilled behind the wall) applied to cut situations. Soil nails are an inexpensive post-tensioned tieback, consisting...
Complexity in Concrete
Centrust Tower in Miami, Fla., is a $95 million, 37 story, 600,000 sq ft tower rising from one side of a block-square 11 story parking garage. Columns on the curved side of the triangular...
The Hybrid Arena
The University of North Carolina's new basketball arena at Chapel Hill combines steel and fabric in a dome whose design by David Geiger Associates is based on the principles...
Mixed Use, Mixed Materials
Tabor Center is a $330 million office/commercial/hotel complex in Denver's urban renewal area. The two block site is bisected by a street that had to be kept open during construction....
Alignment Special Structures for Vancouver's ALRT
This paper describes the special long-span structures, offset columns, and bent structures used in situations where the standardized guideway components used in over 90 percent of the...
Tension-Compression Test of a Concrete Specimen Via a Structure Damage Theory
The concrete sample is assumed to consist of a large number of aggregates and cement paste. Their material properties are assumed to be perfectly elastic. The effective elastic property...
A Space Frame Forecast
New York City's Jacob K. Javits Convention Center has the largest space frame of its kind in the world. There are several unique design features in the space frame, among...
Redecking with Precast Keeps Traffic Moving
The Woodrow Wilson Memorial Bridge in Washington, D.C. could not be closed to traffic while a new deck was constructed. The engineers designed a precast prestressed and post-tensioned...
Reservoir
To preserve a vital part of the St. Louis, Mo. water supply , Stacy Park Reservoir was renovated with a new concrete roof over half its area and new beams in the other half. The new roof...
Easing Strains in Partner-Managed Firms
The family-like nature of partnerships promotes shared management responsibilities but creates conflict. Partnerships, like families, are often taken for granted by the partners. Nonpartners...
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