Browsing by Author "Meresa, Mekonnen"

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    Development of Maintenance Prioritization Guideline for Historical Public Institution Buildings in Addis Ababa
    (Addis Ababa University, 2017) Meresa, Mekonnen; Abebe, Dinku (Prof.)
    This research deals with preparation of maintenance guidelines that enables the prioritization of one historical building over the other. It also deals with identifying the optimal maintenance type appropriate for historical buildings of public institutions in Addis Ababa. The objectives of the research were to prepare maintenance inspection checklist, to inspect and evaluate the maintenance condition of selected buildings and to develop maintenance optimization model for one of the inspected historical buildings, i.e., Menelik II School. Different literatures were reviewed to prepare the inspection checklist and understand trends of developed countries to record maintenance condition of buildings. Visual inspections in conjunction with the developed condition inspection checklist were used to evaluate the maintenance condition of eight historical buildings of public institutions. The research found that six out of the eight selected historical buildings were under „moderate‟ maintenance condition while the rest two buildings are in „good‟ condition. Moreover, the best possible maintenance decision was identified for one of the selected historical buildings, namely, Menelik II School. The maintenance decision was chosen by developing Markov decision process through prescribing appropriate maintenance alternatives along with their detailed engineering cost estimates and by estimating deterioration probabilities from Monte Carlo simulations for the different maintenance decision alternatives. Linear programming was formulated for the decision process to get the optimal maintenance alternative at different conditions of the historical building under budget and time constraints. The maintenance decision model, developed for Menelik II School, suggested to „donothing‟ when a building component is found in an excellent state; to do activities prescribed under „preventive maintenance‟ for building components that are found under good maintenance condition; to execute specified items of work for „repairing defects‟ and „preventive maintenance‟ when building components are classified under moderate condition. Lastly, the decision model recommends to „replace building components‟ based on the developed specification for building components that are in „poor and failed condition.