【摘要】 为研究低预应力度条件下，不同节段接缝的超高性能混凝土-钢筋混凝土(ultra-high performance concrete-reinforced concrete, UHPC-RC)组合梁的抗弯性能，文章基于ABAQUS有限元软件，建立UHPC-RC节段组合梁的基准有限元模型，并利用已有的试验数据验证该模型的合理性。节段接缝分别为平面干接缝、平面胶接缝、齿键干接缝和齿键胶接缝，在基准有限元模型的基础上，进一步研究节段接缝类型对组合梁抗弯性能的影响。研究发现，在四点受弯加载方式下，接缝的几何特征(平面或齿键)对组合梁的极限荷载和开裂荷载影响较小，环氧树脂胶的使用对组合梁的抗弯性能影响较大。更多还原

【Abstract】 To investigate the flexural performance of low-prestressed ultra-high performance concrete-reinforced concrete(UHPC-RC) composite bridges with different segmental joints, this study established a baseline finite element model of UHPC-RC segmental composite beam based on ABAQUS and verified the reasonableness of the finite element model by comparing the existing experimental data. The segmental joints were flat dry joints, flat epoxy joints, keyed dry joints and keyed epoxy joints, and on the basis of the verified finite element model, the effect of the types of segmental joints on the flexural performance of the composite beam was investigated. It was found that the geometric characteristics of the joints(flat or keyed) had less influence on the ultimate load and cracking load of the composite beam under the four-point bending loading mode, and the presence of epoxy resin adhesive had more influence on the flexural performance of the composite beam.更多还原