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| Modeling method for steel fiber reinforced concrete beam column joints |
| XUE Ru，LIU Chenchen，ZHAO Wentong，SHI Ke，ZHANG Tao，GUAN Qiaoyan |
| College of Civil Engineering and Architecture, Zhengzhou University of Aeronautics, Zhengzhou 450046, China |
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Abstract Based on the OpenSEES standard solver, the objectives of this paper presented a numerical simulation method on investigating the seismic behavior of steel fiber reinforced concrete beam column joints through modifying the calculation method of shear deformation in the core area of joint and bond slip deformation of longitudinal reinforcement of beam. And then, a set of experimental data was collected to verify the accuracy of the numerical modeling approach, in terms of the hysteresis curves and skeleton curves. It can be found that the numerical simulationaccurate reflected the development of Beam-Column Joint., and thepredicted curves agreed well with theexperimental results. Furthermore, the influence of some key parameters on the seismic performance of Beam-Column Joint was investigated and discussed in detail, and a design formula for calculating the ultimate shear capacity was also established. Lastly, the parametric analysis clearly indicated that both adding thesteel fiber and increasing the stirrups ratio can significantly improve the seismic behavior of Beam-Column Joint. With the increase in volume ratio of steel fiber, the ultimate load was improved by 18%, respectively. Besides, the ultimate load was improved by 19.7%, with the increase of stirrup diameter.
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Received: 19 November 2020
Published: 28 January 2022
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