what arev the causes of failure of a building/?

Answer 1

*In addition to 1st answer,some more:::::
Main causes of building loss included: corner building failure (42%), collapse of intermediate floors (40%), collapse of upper floors (38%), `pounding:' (one building repeatedly striking another during earthquake vibrations) (15%), and foundation failure (13%).
*Insufficient knowledge ............................... 36%
Underestimation of influence ......................... 16%
Ignorence, carelessness, negligence .................. 14%
Forgetfulness, error ................................. 13%
Relying upon others without sufficient control ....... 9%
Objectively unknown situation ........................ 7%
Unprecise definition of responsibilities ............. 1%
Choice of bad quality ................................ balance
Others...............................................................3%

Answer 2

for a perfect building you need a perfect Foundation, if foundation is shaky the building is more prone to failure by load, torsion of beams or even the wind.

Foundation here also refers to the geology of the earth. If its a riverbed forget it, the life is low

Answer 3

Compression (too much load on the top of supports).

Torsion (weakness at one support which shifts excessive load to other supports)

Shear (from winds on one side causing support failure).