研究鋼筋混凝土受弯构件断面的极限弯曲強度在国外有过很长的历史和作过大量的試驗,可以說对这一問題的了解基本土已經透彻了,但由于在一般的抗弯試驗中只能測得应变分布而不能直接得到应力分布,所以在下面几个主要問題上仍沒有取得一致的見解。 The research on the ultimate bending strength of the section of reinforced concrete flexural members has had a long history abroad and a large number of tests have been conducted. It can be said that the understanding of this problem is already thorough in the basic soil, but only in the general bending test. Since the strain distribution can be measured and the stress distribution cannot be obtained directly, there is still no consensus on the following major issues.