A new method for building risk level estimation under dynamic load

A building, as mechanical system, is composed of elements with different properties and distinctions. Vibration or shock impact action is one of the most effective methods to produce substantial qualitative and quantitative changes in such system. Buildings may be conditionally divided into three main categories: residential, public or social and manufacturing or industrial buildings. Any building during interaction with the dynamic load could pose hazard to human safety in the crowded place, particularly in the case of accidental progressive collapse. This phenomenon is a relatively rare event but study of its behavior is very important both for newly erected and existing buildings in order to reduce the number of casualties in accidents. In general, civil engineering structures such as buildings are composed of elements with different properties. Interaction between these elements subjected to shock loading can be analyzed using „missing column” or „missing slab (beam)” scenarios. It is obvious that the most dangerous buildings are those with massive gathering of people, i.e. leisure, entertainment, shopping centers, high-volume administrative or industrial buildings, residential buildings, buildings of national significance, etc. Our goal is to propose a method to assess each building on a comprehensive hazard risk level under the influence of special effects, especially when the building experiences impact loading. The result would be a given expression of building index which is called a point of risk level D. The use of this point summon up additional assumptions for the assessment of building as integral building system, the consequences of accidents, as well as their prevention.