循环荷载作用下缺口钢筋混凝土多层平板断裂宽度的评估方法

IF 1.6 Q2 MULTIDISCIPLINARY SCIENCES

MethodsX Pub Date : 2025-02-04 DOI:10.1016/j.mex.2025.103184

Nawir Rasidi, Taufiq Rochman

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引用次数: 0

摘要

本文介绍了一种评估循环荷载作用下缺口钢筋混凝土（RC）板裂缝宽度的创新方法，该方法同时考虑了组合板结构中的预制层和现浇层。该研究解决了目前疲劳下裂纹行为研究的空白，提供了一种评估弯曲缺口周围应力分布和裂纹间距的方法。通过采用经验曲率值，并将预测裂缝宽度与实验数据和断裂力学标准进行比较，该方法有效地考虑了拉伸加劲效应。结果表明，复合板在循环荷载作用下裂纹扩展得到控制，抗压能力得到提高，证明了复合作用的有效性。该模型不仅在裂缝宽度预测方面弥合了理论与实际应用之间的差距，而且对循环应力作用下RC结构耐久性优化具有重要意义。该方法有助于延长结构的使用寿命和细化疲劳和断裂工程的设计标准。•使用经验曲率数据测量弯曲裂缝附近的裂缝宽度和间距。•用既定标准验证预测，证明方法的准确性。•提供了一个与RC板的疲劳和断裂力学相一致的裂纹行为模型。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

$A methodology for evaluating the fracture width of a notched RC multiple-layer flat slab under cyclic loading$

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A methodology for evaluating the fracture width of a notched RC multiple-layer flat slab under cyclic loading

This paper introduces an innovative method for assessing crack width in notched reinforced concrete (RC) slabs under cyclic loads, considering both precast and in-situ layers in composite slab configurations. The study addresses gaps in current research on crack behaviour under fatigue, providing a method that evaluates stress distribution and crack spacing around flexural notches. By employing empirical curvature values and comparing predicted crack widths with experimental data and fracture mechanics standards, this approach accounts effectively for tension stiffening effects.

The results reveal that composite slabs exhibit controlled crack propagation and improved resistance under cyclic loading, demonstrating the effectiveness of the composite action. This model not only bridges the gap between theory and practical application in crack width prediction but also contributes to optimizing durability in RC structures exposed to cyclic stresses. The methodology aids in extending structural service life and refining design criteria in fatigue and fracture engineering.

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Measures crack width and spacing near flexural cracks using empirical curvature data.
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Validates predictions with established standards, demonstrating method accuracy.
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Offers a model for crack behaviour that aligns with fatigue and fracture mechanics in RC slabs.

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