Seismic performance of prefabricated bridge substructure
To study the seismic performance of prefabricated bridges,12 groups of grouted sleeve specimens are prepared for unidirectional tensile tests.Based on the fitting of the bond stress-slip constitutive relationship of cast-in-place reinforced concrete structures,the bond slip curve of the sleeves is obtained,which closely resembles the experimental bond slip curve.Software ABAQUS is used to establish finite element models for 2 groups of prefabricated bridge substructures and 1 group of cast-in-place bridge substructures.Parameters are set to numerically simulate the prefabricated bridge substructures.The seismic performance of the prefabricated bridge substructures is analyzed from multiple angles,including failure modes,hysteretic curves,skeleton curves,cumulative energy dissipation,stiffness,and ductility.The results show that the failure mode of the prefabricated bridge substructure connected by grouted sleeves is mainly bending failure.The hysteretic loops of the three models are shaped like a shuttle or an arch.The slopes of the descending segments of the skeleton curves differ only slightly,and the stiffness degradation and ductility coefficients are basically consistent,indicating that the prefabricated bridge substructure connected by grouted sleeves possesses good seismic performance.
uniaxial tension testslurry penetration sleevefinite element analysisseismic performance
万方数据
维普
