Safety Evaluation of Existing Steel Bridges

许多公路钢梁桥梁由于环境影响、钢构件锈蚀以及超大荷载造成的其他损伤而日益恶化。为了确定桥梁的安全性和使用额定值，有必要结合整个桥梁体系的三维特性的固有冗余性来分析所有不利条件的影响。该项目将通过应用最新的基于系统可靠性的技术和损伤评估概念来评估桥梁的安全性，以确定以下各项：更好地了解各种损伤条件和桥梁冗余的影响；评估整个桥梁系统的安全性；并制定指南，为不同类型的钢桥建立分类。

Many highway bridges of steel girders are deteriorating because of environmental effects, corrosion of steel components, and other damanages due to oversized loads. To determine the safety and useful rating of the bridge, it is necessary to analyze the effect of all the adverse conditions combined with the inherent redundancy of the three-dimensional characteristics of the total bridge system. This project will investiage the safety of the bridge by applying the latest system reliability-based technology in conjunction with damage assessment concepts to determine the following: develop a better undrstanding of the effects of various damage conditions and redundances of the bridge; evaluate the safty of the total bridge system; and develop guidelines to establish classifications for different types of steel bridges.