Liquefaction and Lateral Spread Evaluation and Mitigation for Highway Overpass Structure: Cherry Hill Interchange, Davis County, Utah

2000 ◽  
Vol 1736 (1) ◽  
pp. 119-126
Author(s):  
Bradford E. Price ◽  
Marc Stilson ◽  
Michael Hansen ◽  
Jon Bischoff ◽  
T. Leslie Youd
Keyword(s):  
Cost Effective ◽  
Standard Penetration Test ◽  
Lateral Spread ◽  
Vertical Movements ◽  
Cone Penetration Tests ◽  
Cost Effective Method ◽  
Liquefaction Hazard ◽  
Recent Developments ◽  
Design Earthquake ◽  
A Minor

Transportation structures constructed in areas of significant seismic hazards are subject to lateral and vertical movements that can threaten the integrity of structures built on liquefiable subsoils. This case history summarizes the geology, analysis methods, mitigation requirements, and proposed quality control for the Cherry Hill Interchange project in Davis County, Utah. A liquefaction and lateral spread liquefaction hazard during the design earthquake has been identified that threatens failure of the proposed bridge. Cone penetration tests were determined to be a cost-effective method for supplementing standard penetration test borings to gain sufficient subsurface information for the liquefaction and lateral spread analysis. A cost-effective solution for protecting the bridge from the hazard has been developed using geotechnical principles combined with recent developments in liquefaction mitigation. The cost of the mitigation is a minor percentage of the overall project cost but is anticipated to protect the bridge from collapse and save lives.

LCC/RAM Simulation in Support of Gas Turbine Power Plant Forecasting

2003 ◽  
Author(s):  
Neil Winchester ◽  
Steve Hall
Keyword(s):  
Gas Turbine ◽  
Life Cycle Cost ◽  
Power Plants ◽  
Discrete Event ◽  
Cost Effective ◽  
Optimum Operating ◽  
Cost Effective Method ◽  
Simulation Based ◽  
Recent Developments ◽  
Automated Simulation

The activity of Life-Cycle Cost (LCC) forecasting using Reliability, Availability, and Maintainability (RAM) modeling techniques is not new, but there have been recent developments which have resulted in a fundamental change in the usefulness of LCC forecasting to designers, owners, operators, and maintainers of power plants. These changes provide the means for optimizing Operation and Maintenance (O&M) activities many years in advance with a high degree of accuracy. The primary changes have been advances in technology and the introduction of Monte Carlo-based discrete event simulation technology to perform RAM forecasting. Simulation based LCC forecasting can be used to determine the optimum operating and maintenance support scenarios. Main areas of optimization include the initial and through life cost, spares inventory holding, maintenance scheduling, logistics, etc. By allowing various scenarios to be explored in a simulation environment, LCC forecasting provides an accurate and cost effective method for optimizing costs — an activity with a very high Return On Investment (ROI) value proposition. This paper describes the methodology undertaken and the results that can be obtained from the application of automated, simulation-based LCC forecasting technology to the analysis of gas turbine based generating units.

scholarly journals Recent Developments in Compact Membrane Reactors with Hydrogen Separation

Membranes ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 107 ◽  
Author(s):  
Alexander Wunsch ◽  
Paul Kant ◽  
Marijan Mohr ◽  
Katja Haas-Santo ◽  
Peter Pfeifer ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Hydrogen Production ◽  
Heat Storage ◽  
Cost Effective ◽  
Hydrogen Separation ◽  
Membrane Reactors ◽  
Chemical Heat ◽  
Cost Effective Method ◽  
Recent Developments ◽  
And Storage

Hydrogen production and storage in small and medium scale, and chemical heat storage from renewable energy, are of great interest nowadays. Micro-membrane reactors for reforming of methane, as well as for the dehydrogenation of liquid organic hydrogen carriers (LOHCs), have been developed. The systems consist of stacked plates with integrated palladium (Pd) membranes. As an alternative to rolled and electroless plated (Pd) membranes, the development of a cost-effective method for the fabrication of Pd membranes by suspension plasma spraying is presented.

Key Technology Qualification for Increasing Subsea Well Production via Drag Reducing Agents

2021 ◽  
Author(s):  
Arthur J Schroeder, Jr. ◽  
James E. Chitwood ◽  
Tom A. Gay ◽  
John Gillespie ◽  
Yung Lee ◽  
...  
Keyword(s):  
System Integration ◽  
Cost Effective ◽  
Reducing Agents ◽  
Offshore Pipelines ◽  
Pressure Losses ◽  
Well Production ◽  
Cost Effective Method ◽  
Recent Developments ◽  
Injection Unit ◽  
Subsea Pipelines

Abstract Drag reducing agents (DRAs) are a cost-effective method to reduce pipeline pressure losses and maximize flowrates of onshore and offshore pipelines with over 40 years of proven results. With recent developments, production can also be significantly increased by injecting DRA into flow restricted subsea flowlines. This paper will provide a summary of the development and testing of a full-scale prototype subsea DRA storage and injection unit built to achieve the industry goal of alleviating flow restricted subsea pipelines. While DRA applications are proven in thousands of offshore and onshore applications, it has never been successfully injected subsea. System integration testing (SIT) is currently under way on the prototype unit, after which it will be qualified for offshore use. The technology is covered by numerous patents issued and pending in the US and other countries.

Strengthening of existing concrete dams using post-tensioned anchors: a state-of-the-art review

1996 ◽  
Vol 23 (6) ◽  
pp. 1151-1171 ◽  
Author(s):  
Haixue Xu ◽  
Brahim Benmokrane
Keyword(s):  
Cost Effective ◽  
Concrete Dams ◽  
Direct Tension ◽  
Safety Standards ◽  
Cost Effective Method ◽  
Anchor Length ◽  
Probable Maximum Flood ◽  
And Performance ◽  
A Minor ◽  
Post Tensioned

Many old dams are in need of strengthening and rehabilitation as a result of aging, deterioration, deficiencies in design and construction, and more stringent safety standards. These standards include the probable maximum flood and the maximum credible earthquake. Post-tensioned anchors are the most practical and cost-effective method of strengthening existing concrete dams subjected to direct tension, sliding, overturning and seismic loading. In some cases, they are used to stabilize rock abutments and concrete locks and to combat the effects of alkaline and aggregate reaction. The post-tensioning technique requires minimum demolition, has only a minor impact on the dam, and is relatively inexpensive using a small number of anchors. This paper reviews about 60 case histories of concrete dams strengthened by post-tensioned anchors. The reasons for strengthening existing dams are analyzed. The general design, construction, drilling, grouting, testing, and performance of post-tensioned anchors for strengthening concrete dams are outlined. Key words: post-tensioned, anchor, multistrand, fixed anchor length, free anchor length, anchor head, strengthening, rehabilitation, concrete dam.

scholarly journals A COST-EFFECTIVE METHOD FOR CRACK DETECTION AND MEASUREMENT ON CONCRETE SURFACE

2017 ◽  
Vol XLII-2/W8 ◽  
pp. 237-241 ◽  
Author(s):  
M. M. Sarker ◽  
T. A. Ali ◽  
A. Abdelfatah ◽  
S. Yehia ◽  
A. Elaksher
Keyword(s):  
Crack Detection ◽  
Crack Depth ◽  
Cost Effective ◽  
Concrete Surface ◽  
Data File ◽  
Depth Camera ◽  
Destructive Testing ◽  
3D Data ◽  
Cost Effective Method ◽  
Recent Developments

Crack detection and measurement in the surface of concrete structures is currently carried out manually or through Non-Destructive Testing (NDT) such as imaging or scanning. The recent developments in depth (stereo) cameras have presented an opportunity for cost-effective, reliable crack detection and measurement. This study aimed at evaluating the feasibility of the new inexpensive depth camera (ZED) for crack detection and measurement. This depth camera with its lightweight and portable nature produces a 3D data file of the imaged surface. The ZED camera was utilized to image a concrete surface and the 3D file was processed to detect and analyse cracks. This article describes the outcome of the experiment carried out with the ZED camera as well as the processing tools used for crack detection and analysis. Crack properties that were also of interest were length, orientation, and width. The use of the ZED camera allowed for distinction between surface and concrete cracks. The ZED high-resolution capability and point cloud capture technology helped in generating a dense 3D data in low-lighting conditions. The results showed the ability of the ZED camera to capture the crack depth changes between surface (render) cracks, and crack that form in the concrete itself.

CAD Of Anticorrosive Protection Of Steel Structures

2019 ◽  
pp. 18-23
Keyword(s):  
Protective Coating ◽  
Computer Aided Design ◽  
Steel Structures ◽  
Cost Effective ◽  
Operating Conditions ◽  
Computational Tool ◽  
Protection Method ◽  
Cost Effective Method ◽  
The Cost ◽  
Aided Design

The choice of cost-effective method of anticorrosive protection of steel structures is an urgent and time consuming task, considering the significant number of protection ways, differing from each other in the complex of technological, physical, chemical and economic characteristics. To reduce the complexity of solving this problem, the author proposes a computational tool that can be considered as a subsystem of computer-aided design and used at the stage of variant and detailed design of steel structures. As a criterion of the effectiveness of the anti-corrosion protection method, the cost of the protective coating during the service life is accepted. The analysis of existing methods of steel protection against corrosion is performed, the possibility of their use for the protection of the most common steel structures is established, as well as the estimated period of effective operation of the coating. The developed computational tool makes it possible to choose the best method of protection of steel structures against corrosion, taking into account the operating conditions of the protected structure and the possibility of using a protective coating.

Monitoring effluent quality in hypertrophic wastewater reservoirs using remote sensing

1996 ◽  
Vol 33 (8) ◽  
pp. 23-29 ◽  
Author(s):  
I. Dor ◽  
N. Ben-Yosef
Keyword(s):  
Water Quality ◽  
Theoretical Model ◽  
Principal Component ◽  
Cost Effective ◽  
Operational Parameters ◽  
Effluent Quality ◽  
Optical Images ◽  
Routine Monitoring ◽  
Cost Effective Method ◽  
Wastewater Quality

About one hundred and fifty wastewater reservoirs store effluents for irrigation in Israel. Effluent qualities differ according to the inflowing wastewater quality, the degree of pretreatment and the operational parameters. Certain aspects of water quality like concentration of organic matter, suspended solids and chlorophyll are significantly correlated with the water column transparency and colour. Accordingly optical images of the reservoirs obtained from the SPOT satellite demonstrate pronounced differences correlated with the water quality. The analysis of satellite multispectral images is based on a theoretical model. The model calculates, using the radiation transfer equation, the volume reflectance of the water body. Satellite images of 99 reservoirs were analyzed in the chromacity space in order to classify them according to water quality. Principal Component Analysis backed by the theoretical model increases the method sensitivity. Further elaboration of this approach will lead to the establishment of a time and cost effective method for the routine monitoring of these hypertrophic wastewater reservoirs.

A Cost-Effective Method to Prepare Pure Vildagliptin

2013 ◽  
Vol 10 (3) ◽  
pp. 159-163 ◽  
Author(s):  
Jun Peng ◽  
Yue Feng ◽  
Zhu Tao ◽  
Yingjie Chen ◽  
Xiangnan Hu
Keyword(s):  
Cost Effective ◽  
Cost Effective Method
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