em chẳng hiểu lắm, nhưng thấy hay hay nên post lên cho các anh đọc. hy vọng nó có ích !
http://www.landcareresearch.co.nz/ab...earthquake.asp
However the structural mass and sheer weight of the collection vaults on all floors presented a challenge for ensuring this degree of resilience. During a severe earthquake, the vaults could sway with considerable force and magnitude, potentially shaking the rest of the building to pieces....
http://www.landcareresearch.co.nz/ab...earthquake.asp
However the structural mass and sheer weight of the collection vaults on all floors presented a challenge for ensuring this degree of resilience. During a severe earthquake, the vaults could sway with considerable force and magnitude, potentially shaking the rest of the building to pieces....