Seismic performance of L-shaped RC shear walls of buildings subjected to monotonic lateral loading

This research consists of an investigation into the non-linear behaviour of reinforced concrete L-shaped shear walls subjected to seismic loading. Despite their popularity, the numerical modelling of the seismic performance of these walls is relatively sparse. Furthermore, the Algerian seismic design code RPA99 make no reference to this type of shear walls. A finite element model is developed, and its accuracy is validated using the results from experimental testing, showing a good agreement between the two. In the second part, a numerical parametric study of the L-shaped reinforced concrete walls designed according to the Algerian seismic design codes was carried out to assess the reliability and verification of the failure patterns of the damage mechanism. The distribution of stresses in the shear walls, and the impact of ductility and stiffness under monotonic lateral and axial loads in the positive and negative directions at 45 degrees are also given and discussed. The numerical modelling of L-shaped shear wall is shown to meet the objective in a practical and reliable manner, particularly when predicting the non-linear behaviour of reinforced concrete shear walls and assessing the bearing capacity, damage, and failure conditions with high accuracy. The use of radial and diagonal reinforcements provides stress-reducing support and reduces the shear force to avoid diagonal stresses.