Rehabilitation of bridges using aluminum decks

2001 ◽  
Vol 28 (6) ◽  
pp. 992-1002 ◽  
Author(s):  
Paul Arrien ◽  
Josée Bastien ◽  
Denis Beaulieu
Keyword(s):  
Numerical Modeling ◽  
Economic Analysis ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Grid Method ◽  
Economic Study ◽  
Bridge Rehabilitation ◽  
Traffic Loads ◽  
The Cost

The rehabilitation of highway and road bridges is without any question one of today's major challenges. It is to keep up with this challenge that this paper presents an innovative bridge rehabilitation technique which consists in using aluminum decking to replace deteriorated bridge decks. Numerical modeling was carried out on a favored type of decking in order to study and analyze its performance under Canadian traffic loads. Also, an economic analysis was made on a case-study bridge, in order to compare the costs of the proposed technique to the cost of the method currently used by the Quebec Ministry of Transportation for the rehabilitation of certain types of bridge deck.Key words: aluminum, bridge, deck, economic study, extrusion, grid method, rehabilitation.

scholarly journals Current bridge deck rehabilitation practices : use and effectiveness

2021 ◽  
Author(s):  
Melvin Ramcharitar
Keyword(s):  
North America ◽  
Service Life ◽  
Environmental Impacts ◽  
Old Age ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Winter Season ◽  
Department Of Transportation ◽  
Repair Operation ◽  
Bridge Rehabilitation

Approximately thirty to forty percent of all bridges across North America have some form of deterioration on them. Many organizations/agencies across North America are investing significant amounts of money on repairing and rehabilitating their bridges. The reason being, these bridges are deteriorating due to heavy use (overloading from today's oversized trucks), old age (many built in late 1950s and 1960s) and environmental and chemical attacks (deicing salt applications during the winter season). The purpose of this thesis concentrated on one area, namely bridge decks. To better understand how these organizations/agencies were dealing with bridge deck deterioration, a survey containing thirteen questions was developed and sent out throughout North America, to Department of Transportation, Ministry of Transportation, Municipalities, Bridge Authorities and Consultants. The survey was made up of six parts, each focusing on different areas during a bridge rehabilitation/repair operation. Areas looked at were: Condition Surveys, Concrete Removal, Rehabilitation Techniques, Environmental Impacts and Service Life.

scholarly journals Current bridge deck rehabilitation practices : use and effectiveness

2021 ◽  
Author(s):  
Melvin Ramcharitar
Keyword(s):  
North America ◽  
Service Life ◽  
Environmental Impacts ◽  
Old Age ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Winter Season ◽  
Department Of Transportation ◽  
Repair Operation ◽  
Bridge Rehabilitation

Approximately thirty to forty percent of all bridges across North America have some form of deterioration on them. Many organizations/agencies across North America are investing significant amounts of money on repairing and rehabilitating their bridges. The reason being, these bridges are deteriorating due to heavy use (overloading from today's oversized trucks), old age (many built in late 1950s and 1960s) and environmental and chemical attacks (deicing salt applications during the winter season). The purpose of this thesis concentrated on one area, namely bridge decks. To better understand how these organizations/agencies were dealing with bridge deck deterioration, a survey containing thirteen questions was developed and sent out throughout North America, to Department of Transportation, Ministry of Transportation, Municipalities, Bridge Authorities and Consultants. The survey was made up of six parts, each focusing on different areas during a bridge rehabilitation/repair operation. Areas looked at were: Condition Surveys, Concrete Removal, Rehabilitation Techniques, Environmental Impacts and Service Life.

How Accurate Is Ground-Penetrating Radar for Bridge Deck Condition Assessment?

2003 ◽  
Vol 1845 (1) ◽  
pp. 139-147 ◽  
Author(s):  
Heejeong Shin ◽  
Dimitri A. Grivas
Keyword(s):  
Ground Penetrating Radar ◽  
Detection Rate ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Image Processing Algorithm ◽  
False Detection ◽  
Detection Rates ◽  
True Detection ◽  
Ground Penetrating

As ground-penetrating radar (GPR) is increasingly used for assessing the condition of bridge decks, quantifying and controlling the quality of GPR measures becomes an important challenge. A methodology developed to assess the accuracy of deck condition measures is presented, and its use in a case study involving real data is demonstrated. The latter are generated during GPR applications on a large bridge deck and are processed with a commercial image-processing algorithm. The measures extracted from the processed GPR data are the rebar reflection amplitude and the dielectric constant of the deck material. The accuracy of the GPR assessments is evaluated by comparing core data (ground truth) with the GPR measures. The methodology uses appropriate statistical characteristic curves for quality control. It is based on a use of data to plot the probabilities of true detection versus false detection. Image interpretation requires using a threshold value (typically established from experience) selected to optimize true and false detection rates. The results of the case study indicate that rebar reflection data detect defects of the bridge decks at a 75% true detection rate with a 15% false detection rate. The dielectric data generated during field testing appear not to adequately represent the condition of the bridge deck because of the presence of latex-modified concrete overlay. The details of this finding and important conclusions are presented and discussed.

Economic Analysis Using Net Present Value and Payback Period: Case Study of a 9kWp Grid-Connected PV System at UTM, Johor Bahru Campus

2016 ◽  
Vol 818 ◽  
pp. 119-123 ◽  
Author(s):  
Mohamed Almaktar ◽  
Hasimah Abdul Rahman ◽  
Mohammad Yusri Hassan
Keyword(s):  
Economic Analysis ◽  
Net Present Value ◽  
Clean Energy ◽  
Payback Period ◽  
Economic Study ◽  
Zero Energy ◽  
Present Value ◽  
Pv System ◽  
The Public

An economic study for the photovoltaic (PV) projects by the PV installer is essential to avoid the risk that may incur from the investment. This paper discusses the economic analysis of PV installations specifically for the grid connected (GC) systems. The case study is the 9 kW Solar-Home UTM system which is planned to be a showcase GC zero energy house. The house will be able to sell the excess energy back to the grid according to the Malaysian Feed-in Tariff (FiT) implemented in 2012. The economic study conducted is based on the Net Present Value (NPV) and the Pay-Back Period to determine the profitability and viability of the project. The study is believed to encourage and initiate the public to build a successful investment and contribute in the development and deployment of new clean energy sources.

Economic Analysis of Bridge Rehabilitation Options Considering Life-Cycle Costs

1998 ◽  
Vol 1624 (1) ◽  
pp. 8-15 ◽  
Author(s):  
Bruce Johnson ◽  
Tim Powell ◽  
Cesar Queiroz
Keyword(s):  
Economic Analysis ◽  
Net Present Value ◽  
Rehabilitation Program ◽  
Life Cycle Costs ◽  
Bridge Inspection ◽  
Bridge Rehabilitation ◽  
Cost Efficient ◽  
Inspection Data ◽  
The Cost ◽  
Selection Of

A method is described for performing an economic analysis of a large number of bridges to establish priorities and to make preliminary selection of rehabilitation options. Selecting the most cost-efficient rehabilitation scheme for bridges is a critical problem when resources are limited. The information required to perform the analysis is normally available from basic bridge inspection data. The method compares the cost and benefits of various rehabilitation alternatives with the consequences of not undertaking the rehabilitation. A program of bridge works can be selected on the basis of the highest ratios of net present value to capital cost. The computations are well suited to common spreadsheet computer programs. From the results of the computations, owners can prepare an appropriate budget to finance a bridge rehabilitation program. The method is particularly well suited to analyzing how expenditures should be allocated over time when funds are limited.

Techno-economic analysis of a hybrid power system based on the cost-effective hydrogen production method for rural electrification, a case study in Iran

Energy ◽  
2020 ◽  
Vol 190 ◽  
pp. 116421 ◽  
Author(s):  
Mohammad Amin Vaziri Rad ◽  
Roghaye Ghasempour ◽  
Parisa Rahdan ◽  
Soroush Mousavi ◽  
Mehrdad Arastounia
Keyword(s):  
Hydrogen Production ◽  
Economic Analysis ◽  
Power System ◽  
Cost Effective ◽  
Production Method ◽  
Rural Electrification ◽  
Hybrid Power ◽  
The Cost ◽  
Effective Hydrogen

scholarly journals Life-Cycle Cost Analysis of Reinforced Concrete Bridge Decks with Conventional and Corrosion Resistant Reinforcement

2019 ◽  
Vol 271 ◽  
pp. 01009 ◽  
Author(s):  
Ligang Shen ◽  
Mohamed Soliman ◽  
Samir Ahmed ◽  
Christopher Waite
Keyword(s):  
Life Cycle ◽  
Reinforced Concrete ◽  
Life Cycle Cost ◽  
Bridge Deck ◽  
Bridge Decks ◽  
Corrosion Resistant ◽  
Reinforced Concrete Bridge ◽  
Concrete Bridge Decks ◽  
Traffic Delays

Reinforced concrete (RC) bridge decks suffer from corrosion-induced damage due to aggressive environmental conditions or de-icing chemicals. Significant expenditures are typically required to conduct routine maintenance and repairs of affected RC bridges. Compared to conventional steel reinforcement (i.e. black rebar), corrosion resistant reinforcement is initially more expensive but provides longer service life. In this paper, corrosion-induced cracking time, traffic delays associated with bridge deck maintenance, and the environmental impact associated with these activities are integrated into a probabilistic framework to investigate the life-cycle cost of RC bridge decks with conventional and corrosion resistant reinforcement. Monte Carlo simulation is implemented to quantify the probabilistic life-cycle cost of the bridge deck. Preliminary results obtained from this project show that corrosion resistant reinforcement has lower life-cycle cost compared to conventional reinforcement. The indirect cost associated with traffic delays accounts for over 50% of the total life-cycle cost for the investigated case study.

scholarly journals Comparative Technical and Economic Analysis of Organic and Conventional Soybean Production in Greece

2019 ◽  
Vol 76 (1) ◽  
pp. 79
Author(s):  
Stella KARIDOGIANNI ◽  
Ioannis ROUSSIS ◽  
Konstantinos TSIMPOUKAS ◽  
Panayiota PAPASTYLIANOU ◽  
Dimitrios BILALIS
Keyword(s):  
Economic Analysis ◽  
Cropping System ◽  
Soybean Production ◽  
Organic Cultivation ◽  
Alternative Crop ◽  
Technical And Economic Analysis ◽  
Net Profit ◽  
Quality Product ◽  
The Cost

Soybean is considered to be an alternative crop and its cultivation could offer an innovative and high-quality product. A case study was implemented on an existing farm to examine the prospects of soybean production in Greece and to evaluate the economic outcomes of the crop cultivation under organic and conventional cropping system. The economic analysis showed that the cost of conventional soybean production was 0.37 €/kg, while the cost of organic soybeans was 0.50 €/kg. The organic and conventional soybean selling prices were 0.6 and 0.4 €/kg, respectively. In addition, the financial performance of the farm improved after the introduction of organic soybean crop, where the net profit increased by 26.3% compared to the initial profit of the farm, while the increase in the conventional was less at 10%. Soybean is a relatively new crop in Greece with high net profit, especially under organic cultivation mainly due to lower inflow of external imports.

scholarly journals A Comparative Economic Study of Tomato Production by Hydroponics and Conventional Agriculture (With Soil) in Greenhouses: A Case Study in the Nubaria Region

2021 ◽  
pp. 126-140
Author(s):  
Shady Mohamed Shawky Abdelmawgoud ◽  
Hossam Hosney Abdul Aziz ◽  
Ahmed Abdel Ati Shibl ◽  
Mufidah Al-Sayed Qabeel
Keyword(s):  
Fresh Water ◽  
Arable Land ◽  
Financial Indicators ◽  
Economic Study ◽  
Economic Returns ◽  
Conventional Agriculture ◽  
Tomato Production ◽  
The Cost ◽  
Cost Components

One of the most important challenges and obstacles faced by tomato farmers in the new lands is the scarcity of productive resources and their high cost, especially the suppliers of fresh water and arable land, which negatively affects the net yield. Therefore, this research paper aims to make a comparison between tomato production using traditional greenhouses (with soil) and using Hydroponics technology in the new lands with the research sample, aiming to measure the effect of using hydroponics in agricultural greenhouses on the most important indicators of economic returns, by studying and analyzing the cost components of the two production types and studying the most important productive, economic and financial indicators.

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