Reliability Based Bridge Inspection

桥梁管理是通过系统的检查和维护来改善现有桥梁。在美国，桥梁的检查通常每两年进行一次，如果州机构要求，可能会有所改变。通过对桥梁检测数据进行统计分析，并对桥梁进行可靠度评估，得出桥梁劣化模型，为选择更客观的检测区间提供依据。统计分析将应用于具有更多样化的环境和气候条件的国家的桥梁，以便对当前的检查实践进行更完整的评估。提出了一种利用可靠度分析来量化检查间隔并确定桥梁现有和未来可靠度的方法。概念检测策略是在对桥梁状况进行预测的基础上对桥梁进行检测调度。通过一个简单的桥梁案例分析，证明了该程序的有效性。将详细研究为本案例研究所做的某些假设和近似，并制定基于可靠性的综合检查策略。国家桥梁清单缺乏可靠度分析所需的结构特性。将提出使用现有计算机辅助设计与制图（CADD）技术创建桥梁数据库的建议。

Bridge management is concerned with the improvement of existing bridges through systematic inspection and maintenance. Inspection of bridges in the United States is normally performed at two-year intervals, subject to change if requested by state agencies. A bridge deterioration model obtained through statistical analysis of bridge inspection data as well as reliability evaluation of the bridge can be used as a basis for the selection of a more objective inspection interval. The statistical analysis will be applied to bridges in states with more diverse environmental and climatic conditions for a more complete evaluation of the current inspection practice. A methodology is presented for quantifying inspection intervals using reliability analysis and determining existing and future reliabilities of a bridge. The conceptual inspection strategy schedules bridge inspection based on the prediction of the bridge condition. A simple bridge case study is presented to show the effectiveness of such program. Certain assumptions and approximations that are made for this case study will be studied in detail and a comprehensive reliability based inspection strategy will be developed. The National Bridge Inventory lacks structural properties that are needed in the reliability analysis. Recommendations will be presented for the creation of a bridge database using existing Computer Aided Design and Drafting (CADD) technology.