Development of the Methodology for Monitoring the Technical State of Bridge Structures and Establishment of Safe Operating Period

IF 0.7 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Ya.L. Ivanytskyi, Z. Ya. Blikharskyi, O. P. Maksymenko, O. V. Panchenko, Ya. Z. Blikharskyi
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引用次数: 0

Abstract

A methodology for determining the technical state of reinforced concrete bridge structures was developed. It is based on establishing the depth and location of the largest deflection using a laser projection system, as well as an approach to finding the stress-strain state (SSS) along the height of the beam. An energy approach, which foresees the energy of elastic-plastic deformation calculation of concrete and reinforcement was used for this. The specific fracture energy as an invariant characteristic of concrete strength under tension, compression, and also tension of reinforcement were established experimentally. The true diagrams of deformation and fracture of concrete samples taken from the structure were plotted. The results of experimental studies of SSS during the bending of a reinforced concrete beam agree well with those calculated by the finite element method.

Abstract Image

制定监测桥梁结构技术状态和确定安全运营期的方法
开发了一种确定钢筋混凝土桥梁结构技术状态的方法。该方法的基础是利用激光投影系统确定最大挠度的深度和位置,以及沿着梁的高度寻找应力-应变状态(SSS)的方法。为此,采用了一种能量法,即预测混凝土和钢筋弹塑性变形计算的能量。作为混凝土强度在拉伸、压缩以及钢筋拉伸情况下的不变特征的比断裂能是通过实验确定的。绘制了从结构中提取的混凝土样本的变形和断裂的真实图表。钢筋混凝土梁弯曲过程中 SSS 的实验研究结果与有限元法的计算结果非常吻合。
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来源期刊
Materials Science
Materials Science 工程技术-材料科学:综合
CiteScore
1.60
自引率
44.40%
发文量
63
审稿时长
4-8 weeks
期刊介绍: Materials Science reports on current research into such problems as cracking, fatigue and fracture, especially in active environments as well as corrosion and anticorrosion protection of structural metallic and polymer materials, and the development of new materials.
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