Failure Of Renforced Concrete Shear Walls During Earthquake

Reinforced concrete buildings during earthquakes.

Failure of renforced concrete shear walls during earthquake.

Sliding failure of reinforced concrete shear walls was observed after the chilean earthquakes in 1985 and 2010 during shaking table tests and in many quasi static cyclic shear walls tests. Reinforced concrete rc and steel buildings under the action of lateral loads especially during earthquakes. Failure mode of shear walls. Since most buildings built in india are made of rc the dominant set of examples used is of rc buildings.

Reinforced concrete shear wall buildings have shown in statistical terms an adequate performance in past seismic events. Sliding shear walls crack flexural crack cold joint friction aggregate interlock pushover. Compression controlled failure is usually avoided by increasing the thickness of a wall. The amount of energy dissipated during an earthquake depends on the type of failure of the concrete element.

But with no loss of generality the broad concepts discussed in this document are valid for both rc and steel buildings. This type of construction consists of shear walls and frames of concrete. Steel support within concrete columns is a key factor in the strength of a concrete building. However a specific damage pattern was observed in 2010 chile earthquake in some shear walls located in the lower building stories usually associated with high axial stresses lack of transverse reinforcement and vertical.

Shear walls are generally categorized as either slender tall high rise and squat low rise depending on their aspect ratio shear span length divided by wall length. Sliding shear walls crack flexural crack cold joint friction aggregate interlock pushover. Substantial damage to reinforced concrete buildings was seen in the kanto 1923 earthquake. Damages in two six storey non ductile moment frame buildings in golcuk lateral bracing for reinforced concrete frame structures was provided by brick and or concrete masonry walls.

The fact that several reinforced concrete shear wall residential buildings underwent severe structural damage in walls at the lower building levels during the 2010 maule earthquake chile. Reinforced concrete shear walls commonly used in building systems are subjected to axial loads bending moments and shear forces. Damages and failures observed in infill walls of reinforced concrete frame after 1999 kocaeli earthquake 223 figure 5. Sliding failure of reinforced concrete shear walls was observed after the chilean earthquakes in 1985 and 2010 during shaking table tests and in many quasi static cyclic shear walls tests.

Below is a comparison brittle and stronger columns and how they can behave during an earthquake.