| Title | Research on a Whole Bridge Risk Assessment Model for Concrete Bridges |
| Dept | Transportation Engineering Maritime and Air Transport Division |
| Year | 2024 |
| Month | 7 |
| Price | 330 |
| Summary | According to the “Specifications for Highway Bridge Inspection and Reinforcement” in our country, regular inspections of bridges are mandated every two years. These inspections assess the degree and extent of deterioration, the significance of the deterioration, and the urgency of maintenance for each bridge component, assigning numerical ratings from 1 to 4. However, this evaluation is limited to the assessment of individual bridge components and does not provide a comprehensive representation of the overall condition of the entire bridge. In this study, conducted within the framework of the “Specifications for Highway Bridge Inspection and Reinforcement,” the results of regular inspections and bridge inventory data from the “Vehicle Bridge Management Information System” are integrated to propose a “Whole Bridge Risk Assessment” model for general concrete bridges (girder bridges and slab bridges) designed for vehicular traffic. The results of the “Whole Bridge Risk Assessment” are classified into four levels: I (Good), II (Fair), III (Poor), and IV (Severe). A reduction in inspection frequency is recommended for level I bridges without apparent factors causing deterioration. Level II bridges may consider preventive maintenance, level III bridges require maintenance orn increased inspection frequency, and level IV bridges are advised for urgent actions or structural safety assessments, followed by appropriate maintenance, reinforcement, or reconstruction. The “Whole Bridge Risk Assessment” level is determined by the poorer result between the “Structural Safety Rating” and the “Flood Resistance Safety Rating” of the bridge. The “Structural Safety Rating” comprises four levels (I to IV) established by a risk matrix using the Structural Condition Index (SCI) and Risk Index for Structural Safety (RIS) proposed in this study. Similarly, the “Flood Resistance Safety Rating” consists of four levels (I to IV) determined by a risk matrix using the Flood Resistant Capacity Index (FCI) and Risk Index for Flood Resistant (RIF) proposed in this study. The study conducted on-site inspections of 10 bridges to verify the accuracy of the assessment. The established “Whole Bridge Risk Assessment model” can quickly assess the overall condition of the bridge, allowing bridge management agencies (such as the Freeway Bureau, Highway Bureau, and county and municipal governments) to maximize their functions with limited maintenance funds so that repairs in urgent need can be maximized. Bridges can receive appropriate repairs in a timely manner. |
| Post date | 2024/07/29 |
View count:
169