The Associated Press, citing the Baja California state civil protection director, Alfredo Escobedo, said a multistory parking structure collapsed at the Mexicali city hall but no one was injured.
The lateral deformation of multistory frame structure may mainly be shearing displacement between stories, and shearing model between stories may frequently be adopted in analysis of rigidity matrix.
多层框架结构侧向变形主要为层间剪切变形，其刚度矩阵常采用层间剪切模型；
3
The multistory form strut system is a supporting system of interaction and cooperation between the form strut and major structure.