复数名词后面接单数谓语动词是不是违背了主谓不同

The calculations of characteristic values for the pavement design purposes, in the mechanistic method, concerns the estimation of the Young’s modulus E and Poisson ratio 

这句话前面是The calculations复数名词，后面concerns是单数谓语动词，请各位老师帮忙讲解

依据主谓一致原则，复数calculations 作主语，应该用复数谓语动词 concern 才是。