Stiffness For Linear Seismic Analysis Of Concrete Walls

Test of high rise core wall.

Stiffness for linear seismic analysis of concrete walls. A trilinear bending moment curvature model is used to develop a general method for determining the effective flexural stiffness of concrete walls for use in linear seismic analysis. Effective stiffness for seismic analysis author s. Thus the appropriate stiffness for linear seismic analysis is an effective initial stiffness of the structure as it reaches the limit of essentially linear behavior. Perry adebar ahmed m.

The effective initial stiffness should account for cracking of the concrete and other phenomena that reduce. A test was conducted on a large scale model of a concrete. There is a wide variety of models that have been used to simulate the non linear behavior of reinforced concrete walls. A trilinear bending moment curvature model is used to develop a general method for determining the effective flexural stiffness of concrete walls for use in linear seismic analysis.

Such a stiffness is illustrated by the ei effective line in figure 1. Guidance for effective stiffness modeling of shear walls in codes standards and references while fairly clear as they apply to wind analysis lack clarity and consistency when it comes to seismic analysis applications. Ibrahim and michael bryson publication. The method accounts for the initial section stiffness e c i g prior to cracking and the retention of initial stiffness after cracking due to axial compression.

Walls when used with the accompanying impacts on construction costs available rentable space and non structural components.