I will provide you a list which causes the building to collapse.
Defective building design Faulty construction & More extra loads Failure of foundation Unexpected failure mode Soil liquefaction Demolition through explosives Earthquake Tsunami Typhoon and winds with high speed. Landslides or settlement of Sub-base soil due to over drainage. Soil with less bearing capacity. Errors in structural design. Inferior quality of cement and integrants is used. Use after the expiry of the life of buildings. Maintenance not done properly. Proper Foundation not provided. Less amount of reinforcement provided. Reinforcement corroded.