预应力混凝土梁中7股绞线粘结模型的确定

IF 0.6 Q3 ENGINEERING, MULTIDISCIPLINARY

Acta Polytechnica Pub Date : 2021-12-31 DOI:10.14311/ap.2021.61.0740

Vadzim Parkhats, R. Krzywoń, Jacek Hulimka, J. Kubica

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引用次数: 0

摘要

正确选择预应力筋的粘结模型对于正确建模预张拉混凝土结构的结构性能至关重要。本文的目的是确定波兰康索利斯预制混凝土厂生产的预应力混凝土梁中7股钢丝绳的最佳粘结模型。ATENA 3D用于开发梁的有限元模型，这些模型的不同之处仅在于钢筋束的粘结-应力-滑移关系。用于建模的粘结应力-滑移关系取自不同研究人员在前几年进行的粘结测试的结果。此外，为了进行比较，将在Autodesk Robot中创建梁的简化二维模型。对于每一个有限元模型，都可以找到绞线释放时的应变分布。将确定的应变分布与通过使用基于数字图像相关性的测量系统的实验测试建立的梁中的应变分布进行比较。在比较结果的基础上，确定了梁中使用的7股线的最合适的结合模型。

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Determination of bond model for 7-wire strands in pretensioned concrete beam

A correct choice of a bond model for prestressing tendons is crucial for the right modelling of a structural behaviour of a pretensioned concrete structure. The aim of this paper is the determination of an optimal bond model for 7-wire strands in a prestressed concrete beam produced in a precast concrete plant of Consolis Poland. ATENA 3D is used to develop finite element models of the beam that differ only in a bond stress-slip relationship of tendons. The bond stress-slip relationships for modelling are taken from the results of bond tests carried out by different researchers in previous years. Moreover, for comparison purposes, a simplified 2D model of the beam is created in Autodesk Robot. The strain distribution at the time of the strand release is found for each of the finite element models. The determined strain distributions are compared with the strain distribution in the beam established by an experimental test using a measuring system based on a digital image correlation. On the basis of the comparison results, the most appropriate bond models for 7-wire strands used in the beam are identified.

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来源期刊

Acta Polytechnica ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.90

自引率

12.50%

发文量

审稿时长

24 weeks

期刊介绍： Acta Polytechnica is a scientific journal published by CTU in Prague. The main title, Acta Polytechnica, is accompanied by the subtitle Journal of Advanced Engineering, which defines the scope of the journal more precisely - Acta Polytechnica covers a wide spectrum of engineering topics, physics and mathematics. Our aim is to be a high-quality multi-disciplinary journal publishing the results of basic research and also applied research. We place emphasis on the quality of all published papers. The journal should also serve as a bridge between basic research in natural sciences and applied research in all technical disciplines. The innovative research results published by young researchers or by postdoctoral fellows, and also the high-quality papers by researchers from the international scientific community, reflect the good position of CTU in the World University Rankings. We hope that you will ﬁnd our journal interesting, and that it will serve as a valuable source of scientiﬁc information.