Structural Madness

Today, exactly 13 years ago, two planes crashed in the two towers of the World trade center. WTC1 and WTC2. This attack of terrorists is one of the most dangerous attack of all time. Being a structural engineer it is of prime importance to study such a case. A flight, Boeing 767, very small and tiny in front of the tall towers was the reason behind the collapse of the structure.Let us study some important aspects behind the collapse, like the time difference between the collapse of two towers, collapse type and structural failures. 1. Structural Design To understand the failure of any structure in a better sense, it is first important to study the structural integrity and the behavior of the structure itself. You can only know how the column or a beam will fail when you load it and understand it's deformation patter as well as it's load path. Similarly it is important to study the structural design or the structural system of the two towers of world trade center