臺灣橋梁整體構件目視檢測指標之研究

臺灣橋梁於1970年至1990年為興建最高峰。近年來，橋梁需求漸趨飽和，新建橋梁的數量已逐漸下降，總觀整體，臺灣橋齡平均約20年，因此緊接著浮上檯面的是橋梁面臨屆齡、高齡、甚至超齡的問題，大部分橋梁多已接近或超越設計年限，老劣化問題備受關注。若欲維持橋梁運作機能、延長使用年限，維護與整修是未來不可或缺的重要環節。　　然而，橋梁維護有其先後順序之篩選機制，經由專家訪談瞭解橋梁維護以橋梁整體構件狀況指標(Condition Index, CI)為首要依據，透過橋梁是否維修之初步篩選後，再進入承載力及耐震評估等程序。因此，橋梁整體構件狀況指標(CI)具有舉足輕重的地位，亦要能適當地表示橋梁現況之功能。但據本研究分析，結果並非如此，橋梁整體構件狀況指標(CI)數值過於集中，造成橋梁維修初步篩選上的困難，且與橋齡間的關係曲線甚為平緩，實難以藉由橋梁整體構件狀況指標(CI)傳達橋梁現況。　　為解決橋梁整體構件狀況指標(CI)在計算上僅當D、E、R其中任一項為零時，即造成整體分數的提升而掩蓋橋梁實際劣化的嚴重性；或是採平均計算方式當作該構件狀況值等諸如此不周詳之處，本研究欲透過修正橋梁狀況評估指標(CI)原有的計算公式，提出新橋梁整體構件狀況指標(New Condition Index, NCI)。　　藉由重新計算各座橋梁之新橋梁整體構件狀況指標(NCI)，拉開各座橋梁目視檢測後的整體構件狀況指標數值，有助於橋梁維護選擇過程之初步篩選，並描繪出橋齡與新橋梁整體構件狀況指標(NCI)之關係曲線，指出橋梁須大規模維修的時間點，不僅強化一般橋梁目視檢測結果之價值，亦使橋梁管理系統更具完善。

關鍵字

橋梁檢測； D.E.R.&U.目視檢測評估法；新橋梁整體構件狀況指標(NCI)

並列摘要

Taiwan's bridges construction experienced its peak from 1970 to 1990. In recent years, the demand for bridges has decreased resulting in fewer new bridges constructed. In general, the average age of Taiwan's bridges is about 20 years. Therefore, most bridges are reaching or already over their design limitation. Currently, the focus is on the deterioration rate of bridges. However, essential preventive and maintenance strategies for bridges will become an important issue in the future. In addition, visual inspections are not very objective and sometimes results in different assessments. Varying assessments may lead to improper prioritization of corrective action. The Condition Index (CI) is the most important basis in bridges maintenance and plays a decisive role. However, this research analysis has come to a different conclusion. The Condition Index (CI) scores of bridges are too close to show the current status of bridges. This paper attempts to formulate a new calculation formula into the Bridges Management System (BMS) in Taiwan. The goal of this paper is to utilize existing site survey data to determine a performance trend. The paper will modify the formula of Condition Index (CI) to propose New Condition Index (NCI). It is the intention of this research to process the raw inspection data in hopes that the results can provide valuable bridges maintenance information. The new formula will not only enhance the value of the results from visual inspections of general bridges but also improve the bridges management system to make it more perfect.

並列關鍵字

Bridge maintenance ； Visual inspection ； New Condition Index(NCI)

參考文獻

12. 鍾金龍，混凝土橋梁劣化分析模式及維護策略之研究，國立臺灣大學土木工程研究所，曾惠斌教授指導，2007

1. 中村秀明、鬼丸浩幸、河村圭、宮本文穂，日本混凝土學會期刊，第24卷，第1期，2002

10. 廖家禎，拱橋與π型橋目視檢測評估方法之研究，國立中央大學營建管理研究所碩士論文，姚乃嘉、陳建州教授指導，2008

4. 陳冠伶，長橋目視檢測評估方法之研究，國立中央大學營建管理研究所碩士論文，姚乃嘉教授指導，2006

3. 陳明正，腐蝕劣化混凝土橋梁承載能力之檢測與評估，國立中央大學土木工程研究所博士論文，王仲宇教授指導，2005

國際替代計量

臺灣橋梁整體構件目視檢測指標之研究

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