论文部分内容阅读
混凝土已广泛地应用于各种工程建设,有关它的物理、化学、力学性质,人们早就进行了研究.从成型开始,混凝土的强度、弹性模量随着时间的延长而逐渐提高,这是其一种固有的性质.受力作用后,混凝土的变形在作用力的持续时间里,是逐渐增长的,即混凝土具有徐变变形的性质. 为了分析混凝土的徐变试验资料,把它表以数学式,便于进行混凝土结构物受力作用后的应力——应变的计算,本文将探讨一种混凝土的变形力学模型,从而导出其应力——应变与时间关系的数学表达式.
Concrete has been widely used in various engineering constructions. People have conducted research on its physical, chemical, and mechanical properties. Since the beginning of molding, the strength and elastic modulus of concrete have gradually increased over time. This is It has an inherent property. After stress, the deformation of concrete gradually increases during the duration of the force, that is, the concrete has the property of creep deformation. In order to analyze the concrete creep test data, Mathematical formulae, to facilitate the calculation of the stress-strain after the concrete structure is stressed, this article will discuss a deformation mechanics model of concrete, and derive its mathematical expression of stress-strain relationship with time.