Collapse Buildings And its Cause – Natural Cause

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Collapse Buildings And its Cause

Firstly, Collapse building and its cause have become a major concern in the country as many tall buildings are consecutively reported collapse. A building is a permanent or temporary structure enclosed by walls and roof, including all attached apparatus and equipment. It cannot be removed without cutting into ceiling, floors or walls. When any of these mentioned elements failed, it leads to a collapse of the entire building.

Collapse Buildings And its Cause

On the other hand, Collapse of a building as a whole occurs when part or whole body of a structure fails and suddenly gives way, the structure, as a result of this failure, could not meet the purpose for which it was meant for. Building collapse is an extreme case of building failure. In building collapse, the super-structure crashes down totally or partially.

Building Element Failure

The failure in a building element which is caused by a defect in the element as a result of inability of the material making up the components of such building elements to perform its original function effectively, is what finally lead to building collapse. Buildings are meant to provide conveniences and shelter to the people in them. But the same building has been a danger trap to the same people and properties. Building is expected to meet certain basic requirements such as buildability, design performance, cost effectiveness, quality, safety and timely completion.

 Generally, buildings are expected to be elegant and functional but many projects that are constructed do not meet any of these basic requirements. The recurring incidence of building collapse, some of which claimed innocent lives is a consequence of this. There are many factors that cause building collapse in Nigeria and the world at large. They are, structural design and quality management which entails material variability, testing variability, judgment factor, contractors’ variability, poorly skilled workmen and unprofessional conduct.

There are other several reasons why buildings collapse. These reasons are grouped into two namely: (1) natural cause (2) man made cause

Natural Cause of Building Collapse

Differential Settlement 

This is a natural phenomenon that occurred when the soil beneath the structure (building) expands, contracts or shifts away. It is a term used in structural engineering for a condition in which a building’s support foundation settles in an uneven fashion, which often leads to structural damage (collapse).

Groundwater – Collapse Buildings And its Cause

This refers to any water below the surface of the earths crust, it is an integral part of the water cycle and it interacts directly with the water present on the earth. Ground water has great effects on building structures. The effects may include, flooding, swelling of clay, reduction in bearing capacity, hydrostatic uplift pressures, chemical attact and cracks on walls.

Shear Strength – Collapse Buildings And its Cause

Shear strength of a soil is indicative of its resistance to erosion. Specifically, it is defined as the resistance to deformation by the action of tangential (shear) stress. Soil shear strength is made up of cohesion between particles and resistance of particles sliding over each other due to friction or interlocking.

Man Made Cause

Over loading – Collapse Buildings And its Cause

Most buildings collapse mainly because of structural failure. This in most cases occurred when the specific designed load for the building (structure) is exceeded. This mostly happen in major cities as the building owner increase the load by adding to the existing structure to increase the number of occupants from the earlier planned number for the structure.

When considering over loading, it is important to know that it is in three different types; dead load, live loads and wind loads which should be looked out for during construction lest the building and occupants are subjected to danger.

Non professionalism –
Collapse Buildings And its Cause

Many designs are done by non-professionals and many projects are carried out by non-professional also. When this two factor take place in a building project, there is no gainsay that the building will be subjected to advance mistakes that will be over look saying “it doesn’t matter” which will matter than matter in the later days.

Inadequacy in Design

When proper investigation are not carried out before the building structural design is carried out, it lead to inadequacy as many factors will not be put into consideration when designing or executing the project. In such conditions, manipulation of these factors will occur just to fulfill all righteousness. These manipulated factors will later surface leading to different damage on the structure since the appropriate condition were not meet at the initial stage.

Design Disobedient.

This is a situation whereby the project executor fail to adhere to the designer instructions as lain down in the plan.  Once any of the instructions of the designer are omitted or not followed, there is every possibility of that building having serious fault which can lead to collapse. Whenever a change of earlier planned for building structural design to a more complex design that was not accounted for occur, there will be increase on the weight hence putting tension on the columns leading to collapsing.

Incompetence in engineering practices

Improper concrete mixing is the main incompetence done by engineers yet concrete determines how long the building will last. The mixes give the building its durability. 
Before concrete will be approved for a particular job, it ought to have passed through three different stages which are batching, testing and curing. When these three test are not well carried out on a concrete, the building in which such concrete are used is subjected to danger.

Substandard materials

Most of the building materials used in many buildings is substandard. In other words, the materials do not meet the required strength as required by the designer.  Most of the materials uses in our building construction are counterfeit. Ranging from the cement to steel bars. If the engineer is not cautious then a building will end up collapsing because substandard materials can never guarantee a building’s strength.

Poor workmanship

This occurs due to poor supervision and poor role allocation. In this case, if the building owner or engineer does not supervise the builders, they may mix the material poorly.
There are also incidences when instructions of how to go about work on site are influenced by the owner even when he/she has little or no knowledge about the job.
Such inconveniences lead to inefficiency and quack work on site since all specified measures and materials are not followed.

Age out – Collapse Buildings And its Cause

Building materials have a time frame at which they can hold up after use. Buildings are given an expiring time frame, ranging from 50 to 100 years. 
Once these years elapse then this particular building should be brought down. 
This is not always the case in Nigeria. This is when building is deemed to expire.

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