Shui Su Ravine Bridge Design and its Steel Joint Fatigue Performance Evaluation

ce/papers Pub Date : 2024-09-11 DOI:10.1002/cepa.3085
Zhihua Xiong, Xin Yang, Xuyao Liu, Jiaqi Li
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Abstract

Shui Su Ravine Bridge is built in Bai Shui County in Shaanxi Province, which is a part of the highway linking Heyang and Tongchuan. The bridge has been designed as a composite steel-concrete truss bridge with 3 spans in total of 240 meters and a deck of 4 lanes. To meet the harsh environmental demand and lessen the future maintenance, the solution adopts the weathering steel Q420qENH similar strength as S420NL in European code. The bridge is erected by incremental launching and post-installation of the pre-cast concrete slab. Since the truss segment is all welded, two-step models have been developed to evaluate the fatigue performance of the steel truss joint. In the simplified two-dimensional model, Phase-Field (PF) approach has been implemented to make a full fatigue evaluation of crack propagation in the truss.

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水苏涧大桥设计及其钢接缝疲劳性能评估
水苏涧大桥位于陕西省白水县,是连接合阳和铜川的高速公路的一部分。该桥设计为钢-混凝土组合桁架桥,共 3 跨 240 米,桥面为 4 车道。为满足苛刻的环境要求并减少日后的维护,该方案采用了与欧洲规范中 S420NL 强度相近的耐候钢 Q420qENH。桥梁的架设采用增量式下水和预制混凝土板后安装的方式。由于桁架部分全部采用焊接,因此开发了两步模型来评估钢桁架连接处的疲劳性能。在简化的二维模型中,采用了相场(PF)方法对桁架中的裂纹扩展进行全面的疲劳评估。
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Issue Information Reliability-based Allowances of Corrosion Losses for Weathering Steel Bridges Failure mode and load prediction of steel bridge girders through 3D laser scanning and machine learning methods ‘Robinson’ Pedestrian Bridge in Budapest, Hungary Cable-stayed footbridge in Lover Vítkovice Area-DOV
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