[1]YAN Shi,DU Changhong,XIAO Zhengfeng,et al.Resilient Performances Analysis of Fe-SMA Reinforced Frame Joints[J].Journal of Seismological Research,2020,43(03):491-499.
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Resilient Performances Analysis of Fe-SMA Reinforced Frame Joints
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
43
Number of periods:
2020 03
Page number:
491-499
Column:
Public date:
2020-09-14
- Title:
- Resilient Performances Analysis of Fe-SMA Reinforced Frame Joints
- Keywords:
- Fe-SMA frame joints; resilient performances; superelasticity; seismic performances; pseudo-static loading; residual deformation
- CLC:
- TU375.4; TU352; TG139+.6
- DOI:
- -
- Abstract:
- The continuous accumulation of concrete frame structure beam-column joint residual deformations under major earthquakes is one of the main causes for structural destructions.How to reduce residual deformations of the beam-column joints under dynamic cyclic loading and improve their earthquake resilient performances(ERPs)is of great significance.Shape memory alloy(SMA)rebars with the superelasticity can replace ordinary rebars in beam-column joints in concrete frame structures to greatly increase the ductility while maintaining high energy dissipation capacity and high ERPs.In order to systematically analyze the seismic resilient deformation performance,the OpenSEES system platform is used to establish a finite element model(FEM)of corresponding joints,numerically simulating internal forces and deformation laws of ordinary beam-column joints and iron-based SMA beam-column joint under pseudo-static loading,and comparing with the test results.After the model updating,the hysteresis performances of the novel joints under different parameters such as compression ratios are further investigated,obtaining the law of the ultimate bearing capacity,stiffness,damping,residual deformation,and the resilient deformation capacity.The results show that the established model can better reflect the law of the hysteresis performances and resilient deformation capacity,and the proposed novel joint has better seismic performances and resilient deformation capacity as well as obviously reduced residual deformation than the normal joints.
- References:
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Last Update:
2020-09-18