Multiple Objective and Span Evaluation Method for Damage Grade of Existing Reinforced Concrete Bridges

多目標與跨度評估法預測既有鋼筋混凝土橋樑之損傷等級

梁明德(Ming-Te Liang) ； 吳家合(Jai-He Wu) ； 王恆棟(Heng-Dong Wang)

《Journal of Marine Science and Technology》 9卷2期 (2001/12) Pp. 133-144

https://doi.org/10.6119/JMST.200112_9(2).0009

摘要

本文的主要目的是評估既有鋼筋混凝土橋樑的使用性能，採用經典數學中最小平方技巧建立多目標加權分佈法與多跨度加權法，這樣即可使用此法評估既有鋼筋混凝土橋樑的使用性能，這樣即可使用此法評估既有鋼筋混凝土橋樑的使用性能，評估損傷等級分為I，II，III及IV，分別表示無損傷，輕度損傷，嚴重損傷及不適用。應用本文建立之方法評估台北市既有的惠通橋，自強橋，愛國西路高架橋及舊環南高架橋等四座橋，評估結果顯示此四座橋樑均屬於第II損傷等級，若週期性小規模維修和加固，則此四座橋樑均可繼續使用，而維修與加固的順序為惠通橋，愛國西路高架橋，舊環南高架橋和自強橋，顯然，多目標與跨度評估法具有評估既有鋼筋混凝土橋樑的優點。研究結果可提供作為既有鋼筋混凝土橋樑維修、加固或拆除的依據。

並列摘要

The principal purpose of this paper was to investigate the evaluation method of performance for existing reinforced concrete bridges. The least squares technique in classical mathematics was adopted firmly to establish both the multiple objective weight distribution method and multiple span level weight method. Thus, the multiple objective and span evaluation method were built for estimating the performance of existing reinforced concrete bridges. The evaluation model may be divided into grades I, II, III and IV which are described as non-damage, light damage, severe damage and unfit for service, respectively. Using the proposed model, the Huey-tong bridge, Jzyhchyang bridge, Ay-gow west road viaduct and old Hwan-nan viaduct in Taipei were chosen for evaluation. The evaluated results of the present investigation indicate that four existing bridges all belong to grade II. If periodic small scale repair and reinforcement are carried out, then the four bridges can be continuously used. The order of repair and reinforcement is the Huey-tong bridge, Ay-gow west road viaduct, old Hwan-nan viaduct and Jzyh-chyang bridge. Thus, the multiple objective and span evaluation method appears to be advantageous for evaluating the damage grade of existing reinforced concrete bridges. The results of this study were provided as a basis for repair, reinforcement, and demolition of existing reinforced concrete bridges.