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Offshore Platform Structural Verification and Requalification?The Regulator's Viewpoint of Aging Platforms
The regulator's viewpoint of the structural verification and requalification of aging offshore oil platforms is crucial to the continued production of oil and gas. For the...

A Re-Evaluation of Earthquake Hazards Within the California Coastal Zone: Lessons from the Loma Prieta Earthquake
The 7.1 magnitude Loma Prieta earthquake occurred on October 17, 1989, had a duration of 15 seconds, and took 62 lives. Among the lessons learned from this earthquake with regard to offshore...

Earthquake Measures for California OCS Platforms
The ability of a platform to withstand earthquakes is one of the primary design factors for platforms on the California outer continental shelf (OCS). This paper discusses (1) the special...

Phased Engineering Development and Multiple Agency Review of Public Safety Issues
Several Santa Barbara County agencies have key engineering review responsibilities for new development. The magnitude of issues raised and the level of engineering review required for...

LRFD: Still Waiting
Introduced in 1986, load and resistance factor design (LRFD), has a way to go before it becomes standard practice for steel design. LRFD-based design typically results in savings on gravity...

Overall Resistance Parameter of Flow Arising in the Catchment-Area of a Reservoir in Steep Land
On a small reservoir catchment in mountains, the basin storage S(t) during a flood was expressed in terms of the basin discharge Q(t) and the time-varying storage parameters K(t) and P(t),...

Limit States Design of Wooden Formwork for Concrete Walls
Load and resistance factors are developed for ultimate limit states design of wooden formwork components for concrete walls when the lateral concrete pressures are computed using the ACI...

Construction Product Performance, The Unexpected
Efforts made in the construction, industry to increase the quality of the constructed facility through the development of new materials and systems and through the reduction of labor intensive...

Kinematics and Trajectory Planning for Robotic Excavation
One of the high volume and repetitive construction operations at the construction site is the excavation of soil. Automation of the excavation work requires a robotic system that is able...

Air-Water Transfer: The Role of Partitioning
A review is presented of the role of air-water equilibrium in determining the direction and rate of transfer of chemicals between water bodies and the atmosphere. Because this diffusive...

Lifeline Earthquake Engineering in Japan: A State-of-the-Art
This is a subjective state-of-the-art report on the lifeline earthquake engineering in Japan. Beginning from the difference between civil engineering and building engineering in Japan,...

Recent Advances in Seismic Design and Retrofit of California Bridges
This paper describes the damage and lessons learned from the most recent major earthquakes, the resulting bridge seismic design and detailing changes and the seismic retrofit program implemented...

Seismic Design and Performance of Railroad Bridges
Damage to railroad bridges during earthquakes in the United States and Japan is summarized. Research tasks are outlined to develop seismic design and retrofit criteria for railroad bridges....

Earthquake Considerations in Design of the Los Angeles Metro
This paper discusses the earthquake design of the Los Angeles Metro. The design earthquake parameters are presented and discussed in light of the behavior of buried structures subjected...

Seismic Practices for the Air Transportation System: Evolution and Needs
The seismic performance of air transportation systems is reviewed. The evolution of seismic design criteria and practices for major air transportation system elements is discussed. The...

San Francisco Double-Deck Viaduct Retrofits
Following the Loma Prieta Earthquake in October 1989, six double-deck reinforced concrete viaducts in San Francisco were closed because of some isolated damage, and as a precaution for...

Retrofitting Northwest Connector for Seismic Forces
Many pre-1971 bridges in California have inadequate seismic resistance due to non-ductile components or poor connectivity of superstructure elements. Caltrans has finished the first retrofit...

Lifeline Design of Bridges
An analysis and design procedure is presented for retrofitting steel girder bridges that may experience the loss of a pier or column. Multispan and continuous grider bridges are treated....

Scenario for Improving the Seismic Resistance of Pipelines in the Central United States
A number of pipelines transporting crude oil and natural gas to the Midwest and Northeast pass within and adjacent to the New Madrid seismic zone in the central United States. A major...

Telecommunications Facilities Earthquake Readiness Since San Fernando
The vertical rack architecture of telecommunication offices showed some weaknesses during the San Fernando earthquake in 1970. Efforts have been made since then to improve performance...

 

 

 

 

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