Shear and interface shear fatigue of semi‐precast slabs with lattice girders under cyclic loading

IF 3 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Structural Concrete Pub Date : 2024-08-07 DOI:10.1002/suco.202400219

Matthias Hillebrand, Annkathrin Sinning, Josef Hegger

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Abstract

More and more often, semi‐precast reinforced concrete slabs with lattice girders are employed for industrial buildings or bridges, where they are exposed to high cycle fatigue loading. Despite research in recent years that has led to the formulation of an S–N curve for lattice girders, the effects of cyclic loading on semi‐precast slabs have not yet been sufficiently clarified. Moreover, research has so far been limited to single‐span slabs. The effects of continuous slab systems, which are mainly realized in buildings and bridges, cannot be considered in the calculation of fatigue resistance yet. To improve the fatigue design concept for shear and interface shear, theoretical and experimental investigations were conducted at the Institute of Structural Concrete, RWTH Aachen University. In addition to the fatigue behavior of 16 tests under cyclic loading, particular attention is paid to the increase in shear and interface shear resistance at the inner support of continuous slabs. Furthermore, the influences of the support detailing were investigated. The findings illustrate further potential for optimization of the design under cyclic loading.

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带有格构梁的半预制板在循环荷载下的剪切疲劳和界面剪切疲劳

工业建筑或桥梁越来越多地采用带有格构梁的半预制钢筋混凝土板，这些板要承受高循环疲劳荷载。尽管近年来的研究已经得出了格构梁的 S-N 曲线，但循环载荷对半预制板的影响尚未得到充分阐明。此外，迄今为止的研究仅限于单跨楼板。主要在建筑物和桥梁中实现的连续板系统的影响还无法在抗疲劳计算中加以考虑。为了改进剪切和界面剪切的疲劳设计概念，亚琛工业大学混凝土结构研究所进行了理论和实验研究。除了循环加载下 16 次测试的疲劳行为外，还特别关注了连续板内支撑处剪切和界面剪切阻力的增加。此外，还研究了支撑细节的影响。研究结果表明了在循环荷载下优化设计的进一步潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Structural Concrete CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL

CiteScore

5.60

自引率

15.60%

发文量

284

审稿时长

3 months

期刊介绍： Structural Concrete, the official journal of the fib, provides conceptual and procedural guidance in the field of concrete construction, and features peer-reviewed papers, keynote research and industry news covering all aspects of the design, construction, performance in service and demolition of concrete structures. Main topics: design, construction, performance in service, conservation (assessment, maintenance, strengthening) and demolition of concrete structures research about the behaviour of concrete structures development of design methods fib Model Code sustainability of concrete structures.