Failure Of Renforced Concrete Shear Walls During 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.

Failure of renforced concrete shear walls during earthquake.

Reinforced concrete shear walls commonly used in building systems are subjected to axial loads bending moments and shear forces. Shear failure should be avoided because less energy is spent than that due to bending failure. 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. 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. This type of construction consists of shear walls and frames of concrete. Compression controlled failure is usually avoided by increasing the thickness of a wall. 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. Steel support within concrete columns is a key factor in the strength of a concrete building. 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. But with no loss of generality the broad concepts discussed in this document are valid for both rc and steel buildings.

Sliding shear walls crack flexural crack cold joint friction aggregate interlock pushover. Reinforced concrete buildings during earthquakes. Sliding shear walls crack flexural crack cold joint friction aggregate interlock pushover. 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.

The amount of energy dissipated during an earthquake depends on the type of failure of the concrete element. Below is a comparison brittle and stronger columns and how they can behave during an earthquake. Later in niigata 1964 off tokachi 1968 and venezuela 1967 earthquake it suffered heavy damages. Substantial damage to reinforced concrete buildings was seen in the kanto 1923 earthquake.

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.