To study the flexural behavior of prestressed concrete beams with high-strength steel reinforcement and high-strength concrete and improve the crack width calculation method for flexural components with such reinforcement and concrete, 12 specimens were tested under static loading. The failure modes, flexural strength, ductility, and crack width of the specimens were analyzed. The results show that the failure mode of the test beams was similar to that of the beams with normal reinforced concrete. A brittle failure did not occur in the specimens. To further understand the working mechanism, the results of other experimental studies were collected and discussed. The results show that the normalized reinforcement ratio has a greater effect on the ductility than the concrete strength. The cracking- and peak-moment formulas in the code for the design of concrete (GB 50010-2010) applied to the beams were both found to be acceptable. However, the calculation results of the maximum crack width following GB 50010-2010 and EN 1992-1-1:2004 were considerably conservative. In the context of GB 50010-2010, a revised formula for the crack width is proposed with modifications to two major factors: the average crack spacing and an amplification coefficient of the maximum crack width to the average spacing. The mean value of the ratio of the maximum crack width among the 12 test results and the relative calculation results from the revised formula is 1.017, which is better than the calculation result from GB 50010-2010. Therefore, the new formula calculates the crack width more accurately in high-strength concrete and high-strength steel reinforcement members. Finally, finite element models were established using ADINA software and validated based on the test results. This study provides an important reference for the development of high-strength concrete and high-strength steel reinforcement structures.

为了研究高强度钢筋和高强度混凝土预应力混凝土梁的抗弯性能，并改进含这种钢筋和混凝土的受弯构件的裂缝宽度计算方法，在静载荷下测试了12个试件。分析了样品的破坏模式，弯曲强度，延展性和裂纹宽度。结果表明，试验梁的破坏模式与普通钢筋混凝土梁的破坏模式相似。在样品中没有发生脆性破坏。为了进一步了解其工作机制，还收集并讨论了其他实验研究的结果。结果表明，归一化配筋比对延性的影响大于对混凝土强度的影响。发现在梁设计中使用的混凝土设计规范（GB 50010-2010）中的开裂和峰值弯矩公式均可以接受。但是，遵循GB 50010-2010和EN 1992-1-1：2004的最大裂缝宽度的计算结果相当保守。在GB 50010-2010中，提出了修改后的裂纹宽度公式，并修改了两个主要因素：平均裂纹间距和最大裂纹宽度相对于平均间距的放大系数。修正后的12条试验结果与相对计算结果中最大裂纹宽度之比的平均值为1.017，优于GB 50010-2010的计算结果。所以，新公式可以更精确地计算高强度混凝土和高强度钢筋构件的裂缝宽度。最后，使用ADINA软件建立了有限元模型，并根据测试结果进行了验证。该研究为发展高强度混凝土和高强度钢筋结构提供了重要的参考。