Crack spacing has been identified as an important parameter in predicting the crack widths in reinforced concrete (RC) structures. An experimental program has been conducted to investigate the crack spacings when reinforced concrete beams are subjected to both axial tension and flexure. The stochastic nature of cracking behavior makes the experimental program complicated. A large sample size of the crack spacing data was recorded, in order to give a statistical overview. Recent studies in the literature were used to verify the experimental results. The existing crack spacing prediction models have been developed based on different theoretical approaches, namely bond‐slip, no‐slip, and combined approaches. In this study, Eurocode 2, Model Code 2010, Japanese Code, Eurocode 2 with German Annex and Beeby's crack spacing models were selected, as they represent each theoretical approach. Experimental results of this study and from selected literature were compared with the aforementioned prediction models. Japanese Code gave better predictions for axial tensile tests. For the four‐point bending test, all the calculation models gave good agreement with the results, except for Eurocode 2 with German Annex.

中文翻译：

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轴向拉伸和弯曲试样的裂纹间距的实验和理论行为

裂缝间距已被认为是预测钢筋混凝土（RC）结构裂缝宽度的重要参数。已经进行了一个实验程序来研究钢筋混凝土梁同时受到轴向拉力和挠曲时的裂缝间距。开裂行为的随机性使实验程序变得复杂。记录了大的裂纹间距数据样本，以便进行统计概述。文献中的最新研究用于验证实验结果。现有的裂缝间距预测模型是基于不同的理论方法开发的，即粘结滑移，无滑移和组合方法。在这项研究中，我们选择了欧洲规范2，模型规范2010，日语规范，带有德国附件的欧洲规范2和Beeby的裂纹间距模型，因为它们代表了每种理论方法。这项研究的实验结果和来自选定文献的实验结果与上述预测模型进行了比较。日本规范对轴向拉伸试验给出了更好的预测。对于四点弯曲试验，除带有德国附件的欧洲规范2外，所有计算模型均与结果良好吻合。