光圆钢筋混凝土梁受弯承载力研究

Study on Flexural Behavior of Concrete Beams Reinforced with Plain Round Steel Bars

筋混凝土梁的受弯承载力是其力学性能的重要内容,文章通过美国伊利诺伊大学1913年期刊上的部分数据共51组试验梁,对光圆钢筋混凝土梁的受弯性能进行研究,计算出其开裂荷载和屈服荷载,并与试验数据进行对比。研究表明:对于开裂荷载,修正后其计算值与试验值之比的平均值为0.676、方差为0.108,差异较大,因此本次试验中对于开裂荷载的计算,不能采用相关假定的计算方法;对于屈服荷载,其计算值与试验值之比的平均值为0.924、方差为0.018,吻合较好,可以采用该方法对光圆钢筋混凝土梁进行屈服荷载的计算。

Flexural behavior of concrete beams reinforced with plain round steel bars is very important for its mechanical proper- ties.This paper chooses concrete beams reinforced with plain round steel bars to he studied. There are fifty-one test beams from a Nineteen-Thirteen Year＇ s periodical of University of Illinois. USA to study their flexural behavior. Their cracking load and yield load are calculated and compared with the test datas. The results show that bad agreement between prediction results and test results for cracking load is achieved with an average ratio of test results to predicted results being 0.676 and the variance being 0.108. Conse- quently the calculation method can＇t be used for cracking load calculation in this test data.On the contrary, good agreement between prediction results and test results for yield load is achieved with an average ratio of test results to predicted results being 0.924 and the variance being 0.018. Consequently the calculation method absolutely can be used for yield load calculation in this test data of concrete beams reinforced with plain round steel bars.