预应力超高强混凝土梁抗弯性能试验研究

为研究预应力超高强混凝土梁的受弯性能，对4根后张法有粘结预应力超高强混凝土梁进行了试验研究，分析了预应力筋高度和预应力筋配筋率对其受力过程、破坏形态和裂缝开展情况的影响，并通过大型通用有限元程序ANSYS对预应力超高强混凝土梁承载力进行了模拟计算。结果表明：预应力筋高度和预应力筋配筋率对超高强混凝土梁的承载力和裂缝开展情况均有一定的影响； ANSYS模拟计算所得的开裂荷载、屈服荷载以及极限荷载与试验结果较吻合。研究结果可为超高强混凝土梁的设计及研究提供一定的基础依据。

Flexural Behavior Experimental study on Flexural Behavior of Prestressed Ultra–high strength concrete beams

Four post-tensioned bonded prestressed ultra-high strength concrete beams have been tested to investigate the flexural performance of the prestressed ultra-high strength concrete beams. The present study aims to investigate the effect of prestressed tendons height and prestressed reinforcement ratio on the failure pattern, failure mechanism, crack development of prestressed ultra-high strength concrete beams. Based on the large general-purpose finite element program ANSYS, the carrying capacity of prestressed ultra-high strength concrete beams were also analysised. The test results indicated that： the prestressed tendons height and prestressed reinforcement ratio have a certain influence on the carrying capacity and crack development of prestressed ultra-high strength concrete beams. The calculated results from the analysis model gives a good fit with the experiment results, including the cracking load , ultimate load and the yield load of reinforced steel bars. The present research can provide a basis for the design and study of ultra-high strength concrete beams.