THE EFFECT OF GEOMETRICAL PARAMETERS ON THE BEHAVIOR OF Y-SHAPED CABLE BRACING SYSTEMS

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TOFIGHI H.; BARGHIAN M.

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Journal: Sharif Journal of Civil Engineering Year:2015 | Volume:31-2 | Issue:3.1 Page(s): 115-122

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Title

THE EFFECT OF GEOMETRICAL PARAMETERS ON THE BEHAVIOR OF Y-SHAPED CABLE BRACING SYSTEMS

Author(s)

TOFIGHI H. | BARGHIAN M. | Issue Writer Certificate

Keywords

Y-SHAPED CABLE ARRANGEMENT NON-LINEAR ANALYSIS LATERAL STIFNESS CABLE SLACKINGQ2

Abstract

In earthquake-prone regions steel moment frames are a desirable choice for constructing structures due to their appropriate ductility and high energy dissipation capac- ity The main weakness of moment frames is the possi- bility of excessive displacement when subjected to forces resulting from powerful earthquakes which may lead to total destruction of a structure In recent years us- ing cable as a bracing system for moment frames has become an issue of interest to many researchers Ca- ble bracings unlike steel bracings are not subjected to complex phenomenon such as inelastic buckling and due to their high tensile strength and the possibility of high pre-tensioning create considerable stiffness The main weakness of this system is the occurrence of slack- ing phenomenon in the cables when redirecting the lat- eral force which has a dynamic impact on the system Researchers have proposed solutions including the use of special tools and connections and different arrange- ments of cables and dampers in the cable bracing system Using these methods it is possible for the system to use its total capacity at the same time Also by keeping all cables stretched slacking would be prevented when redirecting the lateral force.Studies on Y-shaped cable bracing systems show that all cables in this system participate in providing the lateral resistance of the frame without requiring any spe- cial tools and connections Moreover Y-shaped brac- ing systems are not active in small displacements; they do not affect the elastic behavior of the moment frame and do not reduce flexibility. However, when large dis- placements occur in the frame, this system is activated, which, hence, increases the ductility and stability of the moment frame.In this paper, for investigating the Y-shaped cable brac- ing system operation, in order to keep all cables un- der tension, and the effect of geometrical parameters on system behavior, a program was written in MAT- LAB software. Considering there was no possibil- ity of having limit points in the force-displacement curve of the system, this program was written based on the Newton-Raphson incremental-iterative method for non-linear analysis of structures, which can draw the pushover curve of the bracing system and apply its var- ious geometric parameters as a variable. The results of system modeling in this program indicate that the ar- rangement causes high flexibility, and changing system stiffness is easily possible (by changing the length of the connecting cable and cable diameter). It was also ob- served that with a specific amount of geometric param- eter, the system had maximum lateral stiffness and the most durability against any incidence of cable slacking.

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APA: Copy

TOFIGHI, H., & BARGHIAN, M.. (2015). THE EFFECT OF GEOMETRICAL PARAMETERS ON THE BEHAVIOR OF Y-SHAPED CABLE BRACING SYSTEMS. SHARIF: CIVIL ENINEERING, 31-2(3.1), 115-122. SID. https://sid.ir/paper/128115/en

Vancouver: Copy

TOFIGHI H., BARGHIAN M.. THE EFFECT OF GEOMETRICAL PARAMETERS ON THE BEHAVIOR OF Y-SHAPED CABLE BRACING SYSTEMS. SHARIF: CIVIL ENINEERING[Internet]. 2015;31-2(3.1):115-122. Available from: https://sid.ir/paper/128115/en

IEEE: Copy

H. TOFIGHI, and M. BARGHIAN, “THE EFFECT OF GEOMETRICAL PARAMETERS ON THE BEHAVIOR OF Y-SHAPED CABLE BRACING SYSTEMS,” SHARIF: CIVIL ENINEERING, vol. 31-2, no. 3.1, pp. 115–122, 2015, [Online]. Available: https://sid.ir/paper/128115/en

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