Experimental Study on Seismic Performance of Airport Viaduct Piers in High Intensity Mountain Areas
To explore the seismic performance of viaduct piers in high intensity mountain airport areas,an irregular three-column bracing system was designed and manufactured.Quasi-static tests were conducted to investigate the failure mode and seismic performance of the irregular three-column bracing system under horizontal low-cycle reciprocal loading.A numerical analysis model considering the bending-shear coupling effect was established and compared with the experimental results to validate the accuracy and effectiveness of the numerical analysis model.The research findings indicate that the unreasonable stress distribution in the structure leads to shear failure and loss of bearing capacity in short piers,while the seismic performance of long piers is not fully utilized.Based on this,comparisons were made regarding the bearing capacity,ductility,and energy dissipation coefficient of the steel pipe concrete short pier bracing system.It was found that the bearing capacity and ductility of the steel pipe concrete short pier bracing system increased by 43.23%and 64.27%,respectively,and its energy dissipation capability far exceeded that of the reinforced concrete short pier bracing system,demonstrating superior seismic performance.
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