在双筒梁桥中进行系统级冗余改造

Francisco Javier Bonachera Martin, Sofia Puerto Tchemodanova, Alexandra Willoughby, Linda M. Krueger, Daniel Baxter, Brian Kozy, Francesco Russo
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引用次数: 0

摘要

由于钢结构桥梁中的关键构件(FCM)存在断裂风险,因此必须对其进行手动检查,这导致了高昂的维护成本。本文介绍了对三座被指定为 FCM 的双管梁桥的冗余评估。通过对每个结构进行精细的有限元分析,考虑了主要构件的几种失效情况,以确定断裂是否会导致桥梁坍塌或丧失可使用性。分析遵循美国州公路与交通官员协会的《断裂关键构件和系统冗余构件分析与识别指南规范》。根据这些分析结果,对改造替代方案的可行性进行评估,目的是将 FCM 重新归类为系统冗余构件,并排除实践检查要求。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Retrofits in Twin Tub Girder Bridges for System-Level Redundancy
Because of the perceived risk of fracture critical members (FCMs) in steel bridges, hands-on inspection cycles are mandated, resulting in high maintenance costs. This paper describes the redundancy evaluation of three twin tub girder bridges with FCM designations. Several failure scenarios of primary members are considered using refined finite element analysis of each structure to determine whether fractures result in collapse or loss of serviceability of the bridge. The analysis follows the American Association of State Highway and Transportation Officials Guide Specifications for Analysis and Identification of Fracture Critical Members and System Redundant Members. Based on the outcomes of these analyses, the feasibility of retrofit alternatives is assessed with the purpose of reclassifying FCMs as system redundant members and precluding hands-on inspection requirements.
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