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动荷系数是水泥混凝土路面设计参数之一,其取值大小,直接关系结构物的安全和造价高低。我国现行设计规范系沿用苏联标准,缺乏国内自己的参数。为了改变上述状况,在16个单位协作下,经过三年的测试研究,提出了成果报告。本文扼要介绍了动荷系数测定的概况、方法和成果分析。结论认为:汽车荷载在行驶过程中,动荷系数 K 是在变化的,并服从高斯正态分布规律;变异系数 S 则随车速 V 增大而略有增大,并随车轮荷重 Q 增加而减小。
The dynamic load coefficient is one of the design parameters of cement concrete pavement. The value of the dynamic load coefficient is directly related to the safety and cost of the structure. Our current design norms follow the Soviet Union standards, the lack of domestic own parameters. In order to change the above situation, under the collaboration of 16 units, after three years of test research, the report on the achievements was made. This article briefly introduces the overview, method and result analysis of dynamic load coefficient. The conclusion is that the dynamic load coefficient K is changing during the driving process and obeys Gaussian normal distribution. The coefficient of variation S slightly increases with the increase of vehicle speed V, and decreases with the increase of wheel load Q small.