EVALUATION OF SEISMIC BEHAVIOR OF STEEL BRACED FRAMES WITH CONTROLLED ROCKING SYSTEM AND ENERGY DISSIPATING FUSES

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AMIRZEHNI HASSAN; ASGHARI ABAZAR; SHAFEI ERFAN

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Journal: JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING Year:2016 | Volume:3 | Issue:3 Page(s): 73-85

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Information Journal Paper

Title

EVALUATION OF SEISMIC BEHAVIOR OF STEEL BRACED FRAMES WITH CONTROLLED ROCKING SYSTEM AND ENERGY DISSIPATING FUSES

Author(s)

AMIRZEHNI HASSAN | ASGHARI ABAZAR | SHAFEI ERFAN | Issue Writer Certificate

Keywords

CONTROLLED ROCKING SYSTEMQ2

SELF-CENTERING SYSTEMSQ2

POST-TENSIONED CABLEQ2

ENERGY DISSIPATING FUSESQ2

NONLINEAR TIME-HISTORYQ1

Abstract

The self-centering rocking steel braced frames are new type of seismic lateral-force resisting systems that are developed with aim to limiting structural damages, minimizing residual drifts on systems and creating easy and inexpensive reconstruction capability after sever earthquakes. In Steel braced frames with CONTROLLED ROCKING SYSTEM, column bases on seismic resisting frame are not attached to the foundation and the frame allowed to move freely. The task of restoring the rotated frame to its initial location is on POST-TENSIONED CABLEs, which attaches top of the frame to foundation. The design of post-tensioned stands and braced frame members is such that during earthquakes they remain in elastic region. Seismic energy, dissipates by plastic deformations in replaceable elements on each rock of frame. In current research work, the seismic behavior of this type of lateral resisting systems is evaluated. The research conducted on a one bay steel braced frame with CONTROLLED ROCKING SYSTEM that is analyzed using nonlinear dynamic time history analysis (NLTHA) procedure. The frame is subjected to JMA-Kobe and Northridge ground motions records that are scaled to unit, 1.2 and 1.5 times of maximum considered earthquake (MCE) ground motion level intensity. Extracted results show that seismic behavior of this type of lateral force resisting systems are so desirable even under MCE ground motion levels. The only anxiety is about occurring fatigue in post-tensioned strands that endangers overall stability of system.

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APA: Copy

AMIRZEHNI, HASSAN, ASGHARI, ABAZAR, & SHAFEI, ERFAN. (2016). EVALUATION OF SEISMIC BEHAVIOR OF STEEL BRACED FRAMES WITH CONTROLLED ROCKING SYSTEM AND ENERGY DISSIPATING FUSES. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, 3(3), 73-85. SID. https://sid.ir/paper/252558/en

Vancouver: Copy

AMIRZEHNI HASSAN, ASGHARI ABAZAR, SHAFEI ERFAN. EVALUATION OF SEISMIC BEHAVIOR OF STEEL BRACED FRAMES WITH CONTROLLED ROCKING SYSTEM AND ENERGY DISSIPATING FUSES. JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING[Internet]. 2016;3(3):73-85. Available from: https://sid.ir/paper/252558/en

IEEE: Copy

HASSAN AMIRZEHNI, ABAZAR ASGHARI, and ERFAN SHAFEI, “EVALUATION OF SEISMIC BEHAVIOR OF STEEL BRACED FRAMES WITH CONTROLLED ROCKING SYSTEM AND ENERGY DISSIPATING FUSES,” JOURNAL OF STRUCTURAL AND CONSTRUCTION ENGINEERING, vol. 3, no. 3, pp. 73–85, 2016, [Online]. Available: https://sid.ir/paper/252558/en

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