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Cyclic Loading Test on Beam-to-Column Connections Connecting SRRAC Beams to RACFST Columns

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Abstract

This paper presents an experimental study conducted on the seismic behavior of beam-to-column connections based on the components of steel reinforced recycled aggregate concrete beams and recycled aggregate concrete-filled steel tube columns. The main test parameter of the specimens is the replacement ratio of recycled aggregate. The experiment process and failure modes of all specimens were investigated in detail. Several parameters such as hysteretic behavior, bearing capacity, strength and stiffness degradation, ductility coefficients, and energy dissipation were also analyzed. The test results showed that slipping appeared between the steel tube and beam concrete (sandwiched between the circumferential stiffening plates) while the specimen yielded. The shapes of the moment versus rotation hysteresis curve at the end of the beam were plump, which runs through a linear, reverse “S”-shaped and spindle-shaped deformation stages. Analysis of the seismic evaluation index showed that the replacement ratio of the recycled aggregate had no significant effect on the seismic performance. Moreover, a simulation study was also carried out using FEM, and the results showed good agreement with the skeleton curves obtained from the test. Finally, a simplified calculation model was established and the bearing capacity calculation equation of connections was proposed. Compared with the test results, the calculation equation can satisfy engineering application requirements. The results presented in this paper can be used as reference for engineering practice.

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Abbreviations

f y :

Yield strength of steel

f u :

Tensile strength of steel

E s :

Elastic modulus of steel

f cu :

Compressive cube strength of concrete

f ck :

Axial compressive strength of concrete

l :

Extended length of circumferential stiffening plate

t h :

Thickness of circumferential stiffening plate

h :

Distance between I-flange and steel tube edge

t c :

Wall thickness of steel tube

b :

Width of I-flange

t b :

Thickness of I-flange

x :

Distance between the neutral axis and the edge of compression zone

c :

Distance between the section center of plate and the upper and lower surface of beam

B :

Width of beam

H :

Height of beam

r :

Replacement ratio of RCA

\(M_{{\text{u}}}^{{\text{c}}}\) :

Calculation value of ultimate bending capacity

\(M_{{\text{y}}}^{{\text{t}}}\) :

Test value of yield bending capacity

\(M_{{\text{u}}}^{{\text{t}}}\) :

Test value of ultimate bending capacity

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Acknowledgements

The presented research was conducted under the financial support of the Natural Science Foundation of China (No: 51468003/51508112/51668007) and the Specialized Research Fund for the Doctoral Program of Higher Education (No: 20134501110001).

Funding

Natural Science Foundation of China; Specialized Research Fund for the Doctoral Program of Higher Education.

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Authors and Affiliations

  1. College of Civil Engineering and Architecture, Guangxi University, No. 100, Eastern University Road, Nanning City, Guangxi Province, China

    Li Zhou & Yi-sheng Su

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Correspondence to Yi-sheng Su.

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Zhou, L., Su, Ys. Cyclic Loading Test on Beam-to-Column Connections Connecting SRRAC Beams to RACFST Columns. Int J Civ Eng 16, 1533–1548 (2018). https://doi.org/10.1007/s40999-018-0288-x

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