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10007203
A Numerical Study on the Seismic Performance of Built-Up Battened Columns
Abstract:
Built-up columns have been widely employed by practice engineers in the design and construction of buildings and bridges. However, failures have been observed in this type of columns in previous seismic events. This study analyses the performance of built-up columns with different configurations of battens when it is subjected to seismic loads. Four columns with different size of battens were simulated and subjected to three different intensities of axial load along with a lateral cyclic load. Results indicate that the size of battens influences significantly the seismic behavior of columns. Lower shear capacity of battens results in higher ultimate strength and ductility for built-up columns. It is observed that intensity of axial load has a significant effect on the ultimate strength of columns, but it is less influential on the yield strength. For a given drift value, the stress level in the centroid of smaller size battens is significantly more than that of larger size battens signifying damage concentration in battens rather than chords. It is concluded that design of battens for shear demand lower than code specified values only slightly reduces initial stiffness of columns; however, it improves seismic performance of battened columns.
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References:

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[3] El Aghoury, M. A., A. H. Salem, M. T. Hanna, and E. A. Amoush. "Strength of cold formed battened columns subjected to eccentric axial compressive force. Journal of Constructional Steel Research. 113 (2015): 58-70.
[4] Hashemi, Behrokh Hosseini, and Alireza Poursamad Bonab. "Experimental investigation of the behavior of laced columns under constant axial load and cyclic lateral load." Engineering Structures 57 (2013): 536-543.
[5] Razzaghi, M. S., M. Khalkhaliha, and A. Aziminejad. "Cyclic performance of concrete-filled steel batten built-up columns." International Journal of Advanced Structural Engineering (IJASE) 8, no. 1 (2016): 45-51.
[6] Sahoo, Dipti R., and Durgesh C. Rai. Built-up battened columns under lateral cyclic loading. Thin-walled structures 45, no. 5 (2007): 552-562.
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[8] AS-4100. Steel structures. Homebush (NSW, Australia): Standards Association of Australia; 1998.
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[10] Interim Testing Protocols for Determining the Seismic Performance Characteristics of Structural and Nonstructural Components, FEMA 461. Applied Technology Council, California, 2007.
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