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Cracking analysis of reinforced concrete tensioned members

机译:钢筋混凝土受拉构件的裂缝分析

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摘要

An analytical model, which can simulate the cracking response of reinforced concrete tensioned members, is presented. This model is principally based on the bond stress-slip repartition function that was successfully applied to the analysis of tensile reinforced concrete members. The formalism of repartition functions of loads, strains and slip between steel and surrounding concrete, has allowed analysis of the cracking phenomenon and its influence on the structural behaviour of reinforced concrete members. The tension stiffening effect accompanying the cracking mechanism is taken into account in a more appropriate manner. The phenomenon of localisation of micro-cracking owing to the softening behaviour of concrete in tension is based on the conservative concept of the cracking fracture energy assuming that the band of strain localisation is an intrinsic parameter of the material. The predictive results show that the model is very satisfactory, allowing the evaluation of each material contribution especially in the cracked range. Moreover, a correlation between the obtained and experimental results is observed through the local and global responses.
机译:提出了一种可以模拟钢筋混凝土受拉构件开裂响应的分析模型。该模型主要基于粘结应力-滑动重新分配函数,该函数已成功应用于抗拉钢筋混凝土构件的分析。钢与周围混凝土之间的载荷,应变和滑移的重新分配函数形式化,可以分析开裂现象及其对钢筋混凝土构件结构性能的影响。以更适当的方式考虑了伴随裂纹机制的张力加强效果。由于混凝土在拉伸状态下的软化行为,微裂纹的局部化现象是基于裂纹断裂能的保守概念,假定应变局部化带是材料的固有参数。预测结果表明,该模型非常令人满意,可以评估每种材料的贡献,尤其是在破裂范围内。此外,通过局部和整体响应观察到获得的结果与实验结果之间的相关性。

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