Vol. 16, No. 2, pp. 112-123 (2020)
SEISMIC PERFORMANCE OF HIGH STRENGTH CONCRETE FILLED HIGH
STRENGTH SQUARE STEEL TUBES UNDER CYCLIC PURE BENDING
Guochang Li 1, Zengmei Qiu 1,*, Zhijian Yang 1, Bowen Chen 1 and Yihe Feng 2
1 School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China
2 Liaoning Province Shiyan High School, Shenyang 110841, China
* (Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)
Received: 15 November 2019; Revised: 11 March 2020; Accepted: 13 March 2020
DOI:10.18057/IJASC.2020.16.2.3
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ABSTRACT
To investigate the flexural behavior of high-strength concrete filled high-strength square steel tubes (HCFHSTs) under low-frequency cyclic loading, a test study was conducted on six HCFHSTs adopting different steel ratio. The objective of these tests was to analyze the failure modes, hysteresis curves, envelope curves, strength degradation, stiffness degradation, energy dissipation, and ductility of HCFHSTs. The results indicated that the HCFHST members had great performance, with highly saturated hysteresis curves, excellent energy dissipation capacity, and good ductility. Additionally, more models with different parameters were analyzed using the numerical analysis software ABAQUS, to determine the effects of the parameters on the flexural capacity and seismic performance of the HCFHST members with different steel yield strength (460–960 MPa), concrete compressive strength (60–110 MPa), and steel ratio. The ultimate flexural capacity, initial flexural stiffness, and serviceability-level flexural stiffness of the HCFHST members were calculated using the engineering design codes of several countries. The estimated results of the design codes were compared with the values obtained via the tests and numerical simulations to confirm the feasibility of various engineering design codes for calculating the flexural stiffness and ultimate flexural capacity of HCFHST members. This work will serve as a reference for future engineering design and broaden the applicability of engineering design codes.
KEYWORDS
high strength, pure bending, steel ratio, hysteretic behavior, flexural stiffness
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