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Author: Zaid Alyami Publisher: ISBN: Category : Languages : en Pages : 90
Book Description
Traditional Canadian pavement construction contracts provide detailed specifications for the work that needs to be carried out. This is the case for both maintenance and rehabilitation contracts. However, for many road agencies around the world, this traditional way of contracting had shortcomings. These agencies have been proactive in changing their contracts to maintain the road networks while reducing the cost. The challenge of maintaining the road networks to the highest possible condition while investing the minimal amount of money has promoted innovative contracting approaches. Furthermore, road agencies have increased the private sector involvement through warranty contracts. According to road agencies around the world, there has been a movement over the last two decades towards Performance Based Contracts (PBCs); a long term warranty contract. In PBCs, the client agency specifies certain clearly defined minimal performance measures to be met or exceeded during the contract period and payments are explicitly linked to the contractor successfully meeting or exceeding those performance measures. Therefore, the PBC maintenance and rehabilitation selection differs significantly from that of traditional asset management contracts and more complex due to the pavement deterioration process and probability of failure to achieve the specified level of service for various performance measures along the contract period. This thesis involves the development of a novel framework that facilitates the selection of maintenance and rehabilitation activities for pavement assets under PBCs. The framework consists of two phases. Phase-One, called the Initial Program, uses historical data, performance modeling, and optimization to establish and select the maintenance and rehabilitation program for the bidding stage. Phase-Two, called Project Asset Management, is implemented after the contract is awarded. This phase uses the contract performance monitoring data and the cost estimate from Phase-One as a baseline budget to update and validate the established program through performance modeling and optimization. A case study using data from the Ministry of Transportation Ontario (MTO) second generation Pavement Management System (PMS2) is used to illustrate the framework.
Author: Zaid Alyami Publisher: ISBN: Category : Languages : en Pages : 90
Book Description
Traditional Canadian pavement construction contracts provide detailed specifications for the work that needs to be carried out. This is the case for both maintenance and rehabilitation contracts. However, for many road agencies around the world, this traditional way of contracting had shortcomings. These agencies have been proactive in changing their contracts to maintain the road networks while reducing the cost. The challenge of maintaining the road networks to the highest possible condition while investing the minimal amount of money has promoted innovative contracting approaches. Furthermore, road agencies have increased the private sector involvement through warranty contracts. According to road agencies around the world, there has been a movement over the last two decades towards Performance Based Contracts (PBCs); a long term warranty contract. In PBCs, the client agency specifies certain clearly defined minimal performance measures to be met or exceeded during the contract period and payments are explicitly linked to the contractor successfully meeting or exceeding those performance measures. Therefore, the PBC maintenance and rehabilitation selection differs significantly from that of traditional asset management contracts and more complex due to the pavement deterioration process and probability of failure to achieve the specified level of service for various performance measures along the contract period. This thesis involves the development of a novel framework that facilitates the selection of maintenance and rehabilitation activities for pavement assets under PBCs. The framework consists of two phases. Phase-One, called the Initial Program, uses historical data, performance modeling, and optimization to establish and select the maintenance and rehabilitation program for the bidding stage. Phase-Two, called Project Asset Management, is implemented after the contract is awarded. This phase uses the contract performance monitoring data and the cost estimate from Phase-One as a baseline budget to update and validate the established program through performance modeling and optimization. A case study using data from the Ministry of Transportation Ontario (MTO) second generation Pavement Management System (PMS2) is used to illustrate the framework.
Author: Nigel Powers Publisher: CRC Press ISBN: 1351745964 Category : Technology & Engineering Languages : en Pages : 5447
Book Description
Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges contains lectures and papers presented at the Ninth International Conference on Bridge Maintenance, Safety and Management (IABMAS 2018), held in Melbourne, Australia, 9-13 July 2018. This volume consists of a book of extended abstracts and a USB card containing the full papers of 393 contributions presented at IABMAS 2018, including the T.Y. Lin Lecture, 10 Keynote Lectures, and 382 technical papers from 40 countries. The contributions presented at IABMAS 2018 deal with the state of the art as well as emerging concepts and innovative applications related to the main aspects of bridge maintenance, safety, risk, management and life-cycle performance. Major topics include: new design methods, bridge codes, heavy vehicle and load models, bridge management systems, prediction of future traffic models, service life prediction, residual service life, sustainability and life-cycle assessments, maintenance strategies, bridge diagnostics, health monitoring, non-destructive testing, field testing, safety and serviceability, assessment and evaluation, damage identification, deterioration modelling, repair and retrofitting strategies, bridge reliability, fatigue and corrosion, extreme loads, advanced experimental simulations, and advanced computer simulations, among others. This volume provides both an up-to-date overview of the field of bridge engineering and significant contributions to the process of more rational decision-making on bridge maintenance, safety, risk, management and life-cycle performance of bridges for the purpose of enhancing the welfare of society. The Editors hope that these Proceedings will serve as a valuable reference to all concerned with bridge structure and infrastructure systems, including students, researchers and engineers from all areas of bridge engineering.
Author: Ivan Damnjanovic Publisher: ISBN: Category : Pavements Languages : en Pages : 68
Book Description
Performance-based maintenance contracts are becoming increasingly popular method of procuring maintenance work. This study presents a framework for specifying such contracts. This framework is based on developing a pavement reliability model that is able to account for the effects of rehabilitation actions. The developed reliability model is able to predict the pavement performance before as well as after rehabilitation actions. Numerical illustration for optimization model shows that the developed model can be used to obtain an optimal trade-off between cost and performance. Further, the model considers a tradeoff between economies of scale associated with managing longer pavement sections, and risk mitigation benefits with managing relatively smaller e.g. more homogeneous sections. The results indicate that the length of optimal management sections depends not only on risk premium costs, but also the ability of the contractor to explore economies of scale. The model is illustrated using typical data available to transportation agencies.
Author: Publisher: ISBN: Category : Bridges Languages : en Pages : 126
Book Description
"TRB's Transportation Research Record: Journal of the Transportation Research Board, No. 2360 contains 10 papers that study holistic approaches to maintenance and preservation of transportation infrastructure; guidelines for thermographic inspection of concrete bridge components in shaded conditions; bridge preservation by action type; fatigue testing and structural health monitoring of retrofitted web stiffeners on steel highway bridges; and, vulnerability of bridges exposed to scour. This issue also examines performance measures for bridge preservation; risk modeling of advanced deterioration in bridge management systems; modeling hurricane hazards and damage on Florida bridges; developing bridge management components that facilitate decision making; and, a method to assess bonding characteristics of membrane layers in wearing course on orthotropic steel bridge decks."--Pub. online blurb.
Author: Asian Development Bank Publisher: Asian Development Bank ISBN: 9292611097 Category : Technology & Engineering Languages : en Pages : 165
Book Description
Road asset management is one of the top priorities of the Central Asia Regional Economic Cooperation (CAREC) Transport and Trade Facilitation Strategy 2020. The implementation of performance-based road maintenance contracts (PBCs)—an essential element of road asset management—promotes effective and efficient maintenance of road networks. Well-designed PBCs keep roads in predefined good condition at relatively low cost. This guide aims to help policy makers in CAREC member countries understand and implement PBCs. After a brief history of the development of PBCs, it discusses the various types of PBCs and their relative advantages and disadvantages. It highlights PBC implementation in selected developed, developing, and transitional countries, including CAREC member countries, to illustrate best practices.
Author: Keith Robert Molenaar Publisher: Amer Society of Civil Engineers ISBN: 9780784408865 Category : Technology & Engineering Languages : en Pages : 155
Book Description
The report is a comprehensive and objective presentation of methods that government agencies can use to improve the efficiency and effectiveness of public-sector project delivery.
Author: Ken Skorseth Publisher: ISBN: Category : Gravel roads Languages : en Pages : 112
Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author: Zaid Alyami
Author: Zaid Alyami
Author: Nigel Powers
Author: Soliman Abu-Samra
Author: Ivan Damnjanovic
Author: 
Author: 
Author: Asian Development Bank
Author: Keith Robert Molenaar
Author: Ken Skorseth
Author: Cmaa