A stochastic diagnostic model for subway stations

Semaan, Nabil; Zayed, Tarek

doi:10.1016/j.tust.2009.08.002

Cited by 16 publications

(7 citation statements)

References 4 publications

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“…It can also generate new deterioration curves for every assessment by re-evaluating CI (Semaan, 2011; Boshnakov et al , 2017) to increase its precision.where:t1: The time of the inspection CI : After inspection condition…”

Section: Research Model Developmentmentioning

confidence: 99%

An integrated space-based building maintenance management model using multi-objective optimization

AL-Smadi

Al-Sakkaf

Zayed

2021

SASBE

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PurposeThe purpose of this study is to minimize cost and minimize building condition. Weibull distribution approach was employed to generate deterioration curves over time. The third floor of Concordia University’s Engineering And Visual Arts (EV) Complex in Montreal, Canada, served as a case study to test the maintenance model and determine the optimal maintenance activities to be performed.Design/methodology/approachThis research has demonstrated that there is insufficient fund allocation for the maintenance of non-residential buildings. Therefore, this research focused on designing and developing a maintenance optimization model that provides the type of spaces (architectural system) in a building. Sensitivity analysis was used to calculate weights to validate the model. Particle swarm optimization, based explicitly on multiple objectives, was applied for the optimization problem using MATLAB.FindingsFollowing 100 iterations, 13 non-dominant solutions were generated. Not only was the overall maintenance cost minimized, but the condition of the building was also maximized. Moreover, the condition prediction model demonstrated that the window system type has the most rapid deterioration in educational buildings.Originality/valueThe model is flexible and can be modified by facility managers to align with the required codes or standards.

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Section: Research Model Developmentmentioning

confidence: 99%

An integrated space-based building maintenance management model using multi-objective optimization

AL-Smadi

Al-Sakkaf

Zayed

2021

SASBE

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“…The SSDI model is deterministic, thus, it failed to capture the uncertainties inherit in the problem parameters and the collected data. The stochastic Global Station Diagnosis Model (GSDM) developed by (Semaan and Zayed 2010) resolved this problem. The GSDM model identified different functional condition criteria in a subway station and determined the criteria weights using the AHP.…”

Section: The Subway Station Diagnosis Index (Ssdi) Modelmentioning

confidence: 99%

Risk-Based Asset Management Framework for Subway Systems

Abouhamad

Zayed

2019

J. Constr. Eng. Manage.

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Subway systems play a vital role connecting thousands of people to different destinations on a daily basis. The Canadian infrastructure report card recommended encouraging infrastructure owners to establish asset-management plans based on rates of deterioration and community service levels. Moreover, the 2013 report card for America's infrastructure assigned a grade D to transit systems indicating they are in a poor condition with strong risk of failure. A possible solution proposed by the 2013 report card is adopting a comprehensive asset management system to maximize investments in light of the fund scarcity dilemma. The main objective of this research is to develop a risk-based asset management framework for subway networks. The framework works along three interrelated sub-models followed by two main models. A generic subway hierarchy is proposed and risk is assessed using three sub-models; probability of failure, consequences of failure and criticality index. Probability of failure is predicted for different structural elements using inspection reports and Weibull reliability function. Consequences of failure are assessed based on seven criteria along financial, social, and, operational perspectives. A criticality index is introduced to the classical risk equation to assess the functional importance of a station in its location using seven attributes along three main criteria. The Fuzzy Analytical Network Process is employed to analyze experts' feedback used in the consequences of failure and criticality sub-models. This insures incorporating interdependency between criteria and fuzziness of the analysis.

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“…Potential benefits of using BIM in O&M are significant [2,6] e.g. as valuable 'as-built' (heritage) documentation [7], maintenance of warranty and service information [5,8], assessment and monitoring [4,9], energy and space management [4,10], emergency management or retrofit planning [5,11]. Despite the fact of that owners will be potentially benefited the most by using the facility model and its embedded knowledge of the facility's life cycle [12], the use of BIM in O&M is still falling behind design and construction application.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Every transit authority aims to augment the level of reliability, public safety, and achieve a better level of service [4] that should be considered under constraints of limited budget, implying any transit authority tends to maintain the level of service at an acceptable level. In this case, it is of great importance to decide which maintenance measures could give better level of service by taking the budget into consideration [5].…”

Section: Introductionmentioning

confidence: 99%

The Information Requirements for Transportation Industry’s Facilities Management Based on BIM

Liu¹,

Gao²

2017

TOBCTJ

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In recent decades, Building Information Modeling (BIM) is well-known and has been widely accepted by AEC industry since it could make less mistakes, conflicts, and bring more profits as well as improve the level of communication and coordination. However, in the Operation and Maintenance phase, most of the owners including the transit agencies, still lack the knowledge about what BIM deliverables and processes to demand and how to facilitate and encourage other stakeholders to apply BIM technology. Therefore, this research aims to support Public transit authority in adopting and utilizing BIM processes by means of assessing their current BIM execution status. Through conducting a survey and interview in transit agencies owners, this research focuses on what kind of information requirements the facilities management for BIM deliverables is demanding and how these deliverables are being jointly used for facilities management after completing the handover process of the public transit industry.

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A stochastic diagnostic model for subway stations

Cited by 16 publications

References 4 publications

An integrated space-based building maintenance management model using multi-objective optimization

An integrated space-based building maintenance management model using multi-objective optimization

Risk-Based Asset Management Framework for Subway Systems

The Information Requirements for Transportation Industry’s Facilities Management Based on BIM

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