| Summary: | 碩士 === 國立臺灣海洋大學 === 河海工程學系 === 92 === Abstract
In this article, the principal purpose of the first part was used the relationship between reliability and engineering system construction cost in combination with the failure loss of structure calculated for obtaining optimum reliability. The value was applied to the repair alternative for obtaining the result of optimization analysis. According to the D.(degree) E.(extent) R.(relevancy) evaluation method, the existing reinforced concrete(RC) bridge with and without stridden river can be divided into 21 and 17 substructures, respectively. The use of weight value and cost relation is to attain the relationship between total system construction cost and reliability. And then combination with the failure cost obtained from expected cost is to get the optimum reliability. Moreover, the optimization repair alternative and service life are thus obtained. The main purpose of the second part was studied the life cycle cost for evaluating RC or PC(prestressed concrete) bridge integrity. Let design cost, construction cost, repair cost and inspection cost be division discussion. Further, consider the cost due to failure probability for obtaining the total cost during the predicted service life. Combining every cost and using capital profit cost calculation, the life cycle cost of bridge is obtained. The practical bridge is used as an illustrative example. Use the different foundation and then compare for getting the optimum alternative. In addition, the failure cost due to failure probability is found to obtain the total cost during service life. The results of present study show : (1) The more the cost of bridge maintenance is. The more the whole profit of weigh influence has. The failure cost also influences the optimum reliability. The optimization repair alternative is thus obtained. (2) In the life cycle cost of bridge, different bridge types have various cost. It is worthwhile to point out that the failure cost due to failure probability is an important variable. After constructed bridge, if the failure probability can be measured periodically then a great of engineering profit will be obtained.
Key word: D.E.R. evaluation method, life cycle cost, optimum reliability, failure probability
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