【摘要】 利用有限元分析软件ABAQUS,对不同卸载量下外包钢加固后的钢筋混凝土柱进行非线性分析,研究了加固后混凝土柱的破坏特征、受力性能和破坏机理,得到了混凝土、钢筋及外包角钢相应的荷载位移曲线和应力云图。结果表明:加固时柱子卸载50%左右时,承载力提高幅度最大,加固后其受力性能更好。研究可为实际工程的加固设计提供可靠的参考依据。更多还原

【Abstract】 Corresponding load-displacement curves and stress cloud charts of the concrete,the reinforced steel bar and the encased angle steel were obtained after implementing non-linear analysis for the steel-encased reinforced concrete in presence of different unloading volumes and researching the failure characteristics,mechanical performance and failure mechanism of the concrete pier strengthened by using the finite element analysis software ABAQUS;and the analysis result showed that the increased range of the bearing capacity was greatest when the pier unloaded about 50% during strengthening;and the mechanical performance was better after strengthening and could provide strengthening design of the actual project with reliable reference base.更多还原