【摘要】 为进一步研究预应力型钢超高强混凝土梁的抗弯性能,利用ABAQUS对预应力型钢超高强混凝土梁进行数值分析。模型计算所得荷载-位移曲线与试验结果基本吻合,验证了有限元模型的正确性。结果表明,增加纵向受拉钢筋配筋率对混凝土开裂几乎没有影响,但使梁的屈服荷载和极限荷载均增加;型钢向下偏移,梁的屈服荷载和极限荷载增加;型钢向上偏移虽不能提高构件的承载力,但能改善梁的延性。增加预应力筋配筋率能延缓构件的开裂。更多还原

【Abstract】 For the further research on flexural behavior of prestressed steel reinforced ultra-highstrength concrete beams,ABAQUS was used to simulate the scenario when this concrete beam was under stress.The load-displacement curve of the model constructed using ABAQUS was consistent with the experimental result,which proved the accuracy of the finite element model.The results indicate that high ratio of longitudinal reinforcement can enhance the yield load and ultimate load,but has little influence on the cracking.Downward vertical displacement of the section steel can increase yield load and ultimate load,whereas the upward displacement can’t,but it improves the ductility of the beam.Increasing the reinforcement ratio of the prestressed steel can delay the cracking of the components.更多还原