Duplex Stainless Steels as a Structural Material for Long Life Bridge Construction

2019 ◽  
Author(s):  
Sukanya Hägg Mameng ◽  
Andrew Backhouse ◽  
Jonathan McCray ◽  
Graham Gedge ◽  
Ronny Södergren
Keyword(s):  
Stainless Steel ◽  
Life Cycle ◽  
Life Cycle Costs ◽  
Structural Elements ◽  
High Corrosion Resistance ◽  
Structural Applications ◽  
The Cost ◽  
Service Inspection ◽  
Total Life

<p>Structural duplex stainless steel (DSS) is being increasingly used in non-aesthetic and even non- visible structural elements in bridges to reduce the cost of in-service maintenance compared to use of carbon steel. Until recently, use of stainless steel in the built environment has been driven by architects seeking to develop aesthetically satisfying structures. There is now an emerging trend towards utilising the high corrosion resistance of DSS to reduce total life cycle costs. To validate the assumption that structural DSS are a durable solution, an in-service inspection of DSS in selected European bridges has been undertaken. This assessment has concluded that recently introduced EN 1993-1-4 Annex A 2015 is an appropriate selection tool for structural applications, although in some cases it was found to be somewhat conservative. Having confirmed DSS as a durable material, a case study of the use of DSS in the Söderström bridges in Stockholm is presented. To reduce life cycle costs, this project makes extensive non-visible use of a new DSS grade, EN 1.4662.</p>

scholarly journals Energy Consumption and Life Cycle Costs of Overhead Catenary Heavy-Duty Trucks for Long-Haul Transportation

Energies ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 3446 ◽  
Author(s):  
Ivan Mareev ◽  
Dirk Sauer
Keyword(s):  
Life Cycle ◽  
Energy Consumption ◽  
Power System ◽  
Energy Supply ◽  
Life Cycle Costs ◽  
Heavy Duty ◽  
Energy Consumptions ◽  
The Cost ◽  
Total Life

The overhead catenary truck is an interesting technology for long-haul transportation with heavy-duty trucks because it can combine the advantage of energy supply via catenary while driving and the flexibility of a battery truck on routes without catenary using the traction battery. This study investigates the energy consumptions of overhead catenary trucks on German highways and considers different configurations for the traction battery and catenary power system. Afterwards the life cycle costs of overhead catenary trucks are calculated for a specified long-haul transportation scenario and the results are compared to battery electric truck and diesel truck using the findings of a previous study by the authors. The energy consumption of the considered overhead catenary trucks is approximately equal to that of a battery electric truck but only about a half of the equivalent energy consumption of a conventional diesel truck. According to the cost assumptions in this study, the total life cycle costs of overhead catenary trucks can be in the range of the conventional diesel truck, showing the competitiveness of this alternative truck technology.

Probabilistic Characterization of Life-Cycle Agency and User Costs: Case Study of Minnesota

2017 ◽  
Vol 2639 (1) ◽  
pp. 93-101 ◽  
Author(s):  
Mehdi Akbarian ◽  
Omar Swei ◽  
Randolph Kirchain ◽  
Jeremy Gregory
Keyword(s):  
Life Cycle ◽  
Cost Analysis ◽  
Life Cycle Cost ◽  
Life Cycle Costs ◽  
Potential Implication ◽  
User Costs ◽  
Probabilistic Characterization ◽  
The Cost

Life-cycle cost analysis (LCCA) is a commonly used approach by pavement engineers to compare the economic efficiency of alternative pavement design and maintenance strategies. Over the past two decades, the pavement community has augmented the LCCA framework used in practice by explicitly accounting for uncertainty in the decision-making process and incorporating life-cycle costs not only to the agency but also to the users of a facility. This study represents another step toward improving the LCCA process by focusing on methods to characterize the cost of relevant pay items for an LCCA as well as integrating costs accrued to users of a facility caused by pavement–vehicle interaction (PVI) and work zone delays. The developed model was implemented in a case study to quantify the potential implication of both of these components on the outcomes of an LCCA. Results from the construction cost analysis suggest that the proposed approaches in this paper lead to high-fidelity estimates that outperform current practice. Furthermore, results from the case study indicate that PVI can be a dominant contributor to total life-cycle costs and, therefore, should be incorporated in future LCCAs.

Use of Heavy Duty, Lipped Channel Connections to Improve Rolling Stock Life Cycle Costs: An Analysis of Commonly Used Connection Methods

2015 ◽  
Author(s):  
Mark Lesher ◽  
Guy Prendergast ◽  
Rafael Moras
Keyword(s):  
Life Cycle ◽  
Life Cycle Cost ◽  
Rolling Stock ◽  
Life Cycle Costs ◽  
Heavy Duty ◽  
Heavy Loads ◽  
The Cost ◽  
Hot Rolled ◽  
Lower Production ◽  
Total Life

We present the results of a study in which we examined how different types of heavy-duty mechanical connections can affect total life cycle costs of rolling stock or similar equipment. The three commonly used methods for mechanical connection in the rolling stock industry include: welding, standard – through-hole bolting, and lipped channel, a newer technology. Newer designs of lipped channel connections have high/dynamic load capacities that are not considered possible with common, cold rolled channel products. Hot rolled channel products are capable of withstanding heavy loads typically experienced in welded or bolted joints. Throughout the life of rolling stock equipment, components may need to be replaced or upgraded from a new source, which may require a new mounting pattern or position. We have evaluated the total life cycle costs for the three techniques, when one includes costs for changing the mounting location or size of the bolt pattern. After evaluation of the cost results, we present several examples to show how rolling stock manufactures have used lipped channels to help them lower life cycle cost of their equipment. In addition to yielding flexibility in mounting position, the lipped channel connections facilitate the modularization and customization of products at the lower production levels associated with this industry.

scholarly journals Implementation of strategies for the realization of ecologically and economically optimized serial type house buildings for social housing

2021 ◽  
Vol 2042 (1) ◽  
pp. 012173
Author(s):  
M Vollmer ◽  
H Harter ◽  
K Theilig ◽  
D Kierdorf ◽  
W Lang
Keyword(s):  
Life Cycle ◽  
Environmental Impact ◽  
Social Housing ◽  
Energy Demand ◽  
Implementation Strategies ◽  
Life Cycle Costs ◽  
Renewable Materials ◽  
Life Cycle Assessments ◽  
The Cost

Abstract The goal of this research is to develop ecologically and economically optimized implementation strategies for social housing. Therefore, a case study is analysed over its life cycle using life cycle assessments (LCA) and life cycle costs (LCC) regarding the global warming potential (GWP) and its environmental impact costs (cost per ton of CO2). The case study is optimized regarding the embodied emissions of construction and energy demand during its use stage. Considering the cost ceiling for social housing, it is evident, that an implementation of renewable materials and energies is mandatory in order to prevent the risk of a project failure due to excessive environmental impact costs.

The Potential Impact of Utilizing Advanced Engine Technology for a Combat Capable Unmanned Air Vehicle (UAV)

2000 ◽  
Author(s):  
Greg B. Bruening ◽  
James R. Snyder ◽  
Raymond E. Fredette
Keyword(s):  
Life Cycle ◽  
Performance Comparison ◽  
Advanced Technology ◽  
System Level ◽  
Life Cycle Costs ◽  
Air Defense ◽  
Unmanned Air Vehicle ◽  
Air Vehicle ◽  
Potential Impact ◽  
The Cost

This paper evaluates the potential impact of utilizing advanced engine technology for a limited life, combat capable, unmanned air vehicle (UAV) application. A study was conducted to define payoffs in terms of mission capability and system level life cycle costs (LCC) associated with implementing three different engine development approaches into a combat capable UAV design. The three different approaches considered were: a new, advanced technology engine; an existing (off-the-shelf) engine; and a derivative of an existing engine with limited technology insertion. A detailed vehicle configuration design was developed to conduct this assessment, including a low observable (LO), highly integrated engine/airframe layout for survivability and mission adaptable considerations. The vehicle is designed with multi-role mission capability such as suppression of enemy air defense (SEAD), close air support (CAS), and battlefield air interdiction (BAI). A system level performance comparison is assessed with the three different engine approaches, specifically for the SEAD-type mission. For the cost analysis, the multi-role mission capability is reflected in the overall assumptions such as in the number of aircraft needed to meet the mission requirements. A system level assessment such as in this study is essential in determining whether the additional costs associated with the development of a new, advanced engine is worth the investment. The results of this study suggest that advanced engine technology insertion can provide significant benefits in terms of mission range capability, vehicle weight/size, and overall life cycle costs versus an existing engine.

scholarly journals Incorporating an Asset Health Index into a Life Cycle Costing: A Proposition and Study Case

Mathematics ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1787
Author(s):  
Orlando Durán ◽  
Fabián Orellana ◽  
Pablo Perez ◽  
Tamara Hidalgo
Keyword(s):  
Life Cycle ◽  
Life Cycle Costing ◽  
Life Cycle Costs ◽  
Health Index ◽  
Central Chile ◽  
Proposal A ◽  
Sensitivity Studies ◽  
Useful Life ◽  
Physical Assets

A physical asset’s health is the consequence of a series of factors, ranging from the characteristics of the location where it operates to the care it is submitted to. These characteristics can influence the durability or the horizon of the useful life of any equipment, as well as determine its operational performance and its failure rates in the future. Therefore, the assessment of the influence of asset health on Life Cycle Costs is a compelling need. This paper proposes the incorporation of a factor that reflects the projected behavior of an asset’s health index into its corresponding Life Cycle Costing (LCC) model. This allows cost estimates to be made more realistic and LCC models to be operated more accurately. As a way of validating this proposal, a case study is shown. The methodology proposed in this case study was applied in a real case, considering an LNG facility located in central Chile. In addition, sensitivity studies and comparisons with the results obtained by a traditional Life Cycle Costing model are included. The results show the usefulness of incorporating asset health aspects into the Life Cycle Costing of physical assets.

scholarly journals Design and Analysis of Stage Progressive Die for a Sheet Metal Component

2019 ◽  
Vol 8 (4) ◽  
pp. 834-841
Keyword(s):  
Life Cycle ◽  
Life Cycle Analysis ◽  
New Technology ◽  
Vital Role ◽  
Metal Component ◽  
Progressive Die ◽  
Stamping Die ◽  
The Cost ◽  
Sheet Metal Component

Stamping die industries had been a significant impact on research and development of new technology for bigger and advance. To sustain the stamping die industry under the current global situation, cost and time are most important factors that need to be focus. In this case study, the main problem of design and analysis of progressive die is cost spent for die fabrication is high, the number of station or stages is high that will affect the production time and lifespan of tool is short. This paper focused at the stages or station that will be redesign to reduce the cost for the die, station optimization to reduce time taken for stamping process and simulate the design of tools to calculate the life cycle of punch. The study is conducted through AutoCAD and Solidwork to redesign the die and strip layout optimization. Subsequently, the ABAQUS/CAE and e-fatigue are used to completed the analysis and life cycle results for punch with various design of punch edge. Theoretical analysis indicates that design of punch plays a vital role in life cycle analysis.

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