Journal of Emerging Trends in Engineering and Applied Sciences: Research Areas

Abstract:
This paper proposed and evaluated self-excited responses of multi-bay reinforced concrete frames with stiffened joints. In the course of this work, much emphasis was placed on how the lengths of stiffened joints could influence the dynamic response of the frames under self-excitation. Consequent upon, the stiffened length ratio, (i.e. the ratio of stiffened length to unstiffened length) of the structural members are varied and at each condition the associated frequency spectrum of the simulated frame was evaluated; and a comparative analysis was made on the fundamental period of the stiffened joints model with that of its equivalent shear building model. It was found that at about eleven percent (11%) stiffened length ratio, a 3-floor dual-bay r. c. frame with stiffened joints model exhibited dynamic response equal to that of its equivalent shear building model. Similarly, similar responses were attained at thirteen percent (13%) and sixteen percent (16%) stiffened length ratios respectively for a 5-floor dual-bay frame and a 9-floor dual-bay frame with stiffened joints models when compared with that of their equivalent shear building models.

Keywords: multi-bay frames with stiffened joints; self-excitation; natural frequencies; fundamental period of vibration

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