Author(s)

I. Iskhakov

Abstract

Self variable stiffness system for optimal seismic response of RC frame with concrete braces I. Iskhakov Department of Civil Engineering, College ofJudea and Samaria, Israel Abstract The purpose of this paper is the study of RC fully braced frame showing that its concrete braces change the stiffness of the frame and provide its optimal seismic response. The frame itself controls its behavior, attenuating the seismic response through autonomous disengagement of its concrete braces in tension. The advantage of the physical non-linearity of the brace material (concrete) in compression is also taken into account. Additionally the influence of the vertical static loading is studied. The system has several levels of seismic control, which it selects for its optimal response to a given earthquake. All the above factors significantly reduce (over 50% as well be shown in paper) the seismic forces and dynamic displacements, and create an optimal scheme of the structure. A total

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