钢筋混凝土蠕变的现代理论

Alexander D. Beglov, R. Sanjarovskiy, T. Ter-Emmanuilyan
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引用次数: 0

摘要

探讨了早先确定和发表的钢筋混凝土徐变理论的重要特征。钢筋混凝土徐变理论的创立和发展是基于经典力学体系中与该理论不符的非科学原理。我们对许多国家使用的理论进行了详细分析,发现了五种过度简化,它们拒绝接受基本实验、欧洲规范、数学和力学规则:在徐变规律中列出的过度简化严重扭曲了计算结果,不仅扭曲了变形本身,还扭曲了随后的钢筋混凝土结构计算方法。这些错误包括:不必要地修改了经典的胡克定律;强加了混凝土所不具备的特性--徐变的代数量;错误的叠加原理;使用粘弹性变形代替瞬时非线性塑性变形;用线性特性代替混凝土明显的非线性和非稳态特性,扭曲了非线性系统固有现象的定性。这些错误都被不合理的安全系数所掩盖,从而破坏了问题的经济成分,而在全世界使用的大量钢筋混凝土中,不科学的计算分析理论给全球建筑业造成了巨大的经济损失。
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Modern Theory of Creep of Reinforced Concrete
The important features of the theory of creep of reinforced concrete, identified and published earlier, are explored. The creation and development of the theory of creep of reinforced concrete is based on non-scientific principles take from systems of classical mechanics that do not correspond to this theory. A detailed analysis of the theory used in many countries was performed, while five oversimplifications were identified that reject fundamental experiments, Eurocodes, rules of mathematics and mechanics: listed in the law of creep, oversimplifications that grossly distort the calculation results, not only the deformations themselves, but also subsequent methods for calculating reinforced concrete structures. These include: unnecessarily modified classical Hooke’s law; imposing a property missing from concrete - an algebraic measure of creep; erroneous superposition principle; use of viscoelastic deformations instead of instantaneous nonlinear plastic deformations; replacement of obvious - nonlinear and non-stationary properties of concrete with linear ones, distorting the qualitative side of phenomena inherent only in nonlinear systems. These errors are covered by unreasonable safety factors, which undermines the economic component of the problem, and of the enormous volumes of reinforced concrete used throughout the world, the analyzed unscientific theory of its calculation causes enormous economic damage in global construction.
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来源期刊
自引率
0.00%
发文量
26
审稿时长
18 weeks
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