SIZE EFFECT IN TENSILE AND COMPRESSION FRACTURE OF CONCRETE STRUCTURES : COMPUTATIONAL MODELING AND DESIGN
SIZE EFFECT IN TENSILE AND COMPRESSION FRACTURE OF CONCRETE STRUCTURES : COMPUTATIONAL MODELING AND DESIGN
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混凝土结构拉伸和压缩断裂的尺寸效应：计算建模和设计
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通讯作者：
Z. Bažant
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作者：
Z. Bažant
本文有两方面的内容：(1)综述了混凝土结构拉、压断裂尺寸效应问题的最新研究成果；(2)介绍了一些新的进展。综述了适合设计的简单近似尺寸效应公式，以及尺寸效应评估所需的骨折计算模型。在此背景下，提出了裂纹萌生失效的尺寸效应公式的一种新形式。新的结果包括通过J积分的推广分析准脆性断裂的标度，并将其用于渐近尺寸效应公式的推导。
The paper has a two-fold pui-pose: (1) to review the main recent results on the problems of size effect in tensile and compression fracture of concrete structures, and (2) to present some new developments. The review focuses on simple approximate size effect formulae suitable for design, as well as the computational modeling of fracture required for the assessment of size effect. One new form of the formula for size effect in failures occurring at crack initiation is presented in this context. The new results include analysis of scaling of quasibrittIe fracture through an extension of the J-integral and its use for the formulation of asymptotic size effect formula.