论文部分内容阅读
目前,对混凝土动载力学行为的研究无论在理论上还是方法上都很不成熟,瑞士惠特曼教授曾将日本三桥的随机过程模型用来描述混凝土的快速破坏,发现混凝土的抗压、抗拉、抗折强度与应力速率的关系可描述为:式中σ_0、σ分别为在应力速率σ_0和(?)下的破坏强度;β是与材料性质有关的参数,称为“材料常数”。(1)式表明:材料的动态响应完全取决于它的“材料常数”。可见,材料的β与它的动载力学行为有着内在联系。但是,目前对“材料常
At present, the study of the mechanical behavior of concrete dynamic loads is not mature either theoretically or methodically. Prof. Whitman of Switzerland once used the random process model of the Third Bridge of Japan to describe the rapid destruction of concrete and found that the concrete is resistant to pressure. The relationship between tensile strength, flexural strength and stress rate can be described as: where σ_0, σ are the failure strengths at stress rates σ_0 and (?), respectively; β is a parameter related to the material properties, called “material constant” . The formula (1) shows that the dynamic response of a material depends entirely on its “material constant.” It can be seen that the β of the material is intrinsically linked to its dynamic load behavior. However, at present,