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Appl. Sci. 2018, 8(1), 131; doi:10.3390/app8010131

Experimental Investigation on Seismic Behavior of Steel Truss-RC Column Hybrid Structure with Steel Diagonal Braces

1
School of Civil Engineering, Chang’an University, Xi’an 710061, China
2
School of Civil Engineering, Xi’an University of Science and Technology, Xi’an 710054, China
3
School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China
4
School of Civil Engineering, Chongqing University, Chongqing 400044, China
*
Author to whom correspondence should be addressed.
Received: 6 December 2017 / Revised: 8 January 2018 / Accepted: 15 January 2018 / Published: 18 January 2018
(This article belongs to the Section Acoustics)
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Abstract

This paper aims to provide an experimental support on seismic performance evaluation of the steel braced truss-RC (reinforced concrete) column hybrid structure, which could be applied as the air-cooled supporting structural system in large-capacity thermal power plants located in strong earthquake prone regions. A series of pseudo-dynamic tests (PDTs) and quasi-static tests (QSTs) were performed on a 1/8-scaled sub-structure. The dynamic characteristics, lateral deformation patterns, deterioration behavior, hysteretic behavior and failure mechanisms were investigated. Test results showed that the first vibration mode is torsion, which is caused by the small torsional stiffness of this kind of hybrid structure. The lateral deformation shape is shear mode, and the drift ratio of the structure above the corbel is significantly less than that of the column below the corbel. Earthquake energy is mainly dissipated by the RC pipe columns where cracks mainly occurred at the bottom of column and lower part of corbel. The failure mechanisms were identified indicating that the steel braces improved the global stiffness and modified the load transfer mechanism. This study affirms that the steel braced truss-RC column hybrid structure has the sufficient ductility and good energy dissipation capacity to satisfy the design requirements in high seismic regions. View Full-Text
Keywords: steel-concrete hybrid structure; steel diagonal brace; pseudo-dynamic test; quasi-static test; seismic behavior steel-concrete hybrid structure; steel diagonal brace; pseudo-dynamic test; quasi-static test; seismic behavior
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Wang, B.; Dai, H.; Wu, T.; Bai, G.; Bai, Y. Experimental Investigation on Seismic Behavior of Steel Truss-RC Column Hybrid Structure with Steel Diagonal Braces. Appl. Sci. 2018, 8, 131.

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