Clamped Part Influence on Load- Deformation Behavior of Reinforced Concrete Shear Walls under Cyclic Loading

Load-deformation behavior is decisive for the effectiveness of stiffening walls under earthquake loads and RC shear walls are an important tool to resist these loads. However, deformations in these walls’ clamping zones are usually not considered; their benefits and risks are neglected. Carrying out large-scale wall tests and using an optical measurement system for displacements show that more attention should be paid to the clamping zone. In particular, clamped wall part bending deformations, as well as sliding shear deformations, should also be considered. A separation of displacement components clearly shows that stiffening walls’ clamping zones have a positive influence on load-deformation behavior due to flexure. At the same time, the clamping zone, especially for squat walls, carries the risk of sliding shear failure, which would lead to a premature loss of horizontal stability.