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一、前言混凝土的弹性与徐变是抵抗变形和破坏的重要指标。在研究结构因强迫变形和荷载长期作用的应力应变时,需要考虑混凝土徐变和弹性性质随时间的变化。混凝土徐变是一种极为复杂的现象。为了进行结构分析,有关徐变物理方程的研究又是最重要的。在技术理论方面,把常荷载试验获得的数据用到变应力的徐变计算,概括起来主要有迭加法(又称弹性徐变理沦)、徐变率法(包括老化理论)和变形模量法(又称代数法)。更深入的研究建议将弹性徐变理论与老化理论结合,提出了弹性老化理论的徐变解析式。
I. INTRODUCTION The elasticity and creep of concrete is an important indicator of resistance to deformation and destruction. When studying the stress and strain of structures due to forced deformation and long-term load, the creep and elastic properties of concrete must be considered over time. Creep of concrete is an extremely complicated phenomenon. For structural analysis, the study of creep physical equations is the most important. In terms of technical theory, the data obtained from the constant load test is used to calculate the creep of variable stress, and summed up are mainly the superposition method (also known as elasticity and creep deformation theory), creep rate method (including aging theory) and deformation modulus method ( Also known as algebraic method). A more in-depth study suggests combining elastic creep theory with aging theory and proposing a creep analysis of elastic aging theory.