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本研究工作是针对横向有小孔洞的梁,在弯曲和扭转的共同作用下进行的。根据斜弯曲模型,按1、2和3型破坏型态推导强度计算公式时,均假设在孔洞周围配有适当形式的钢筋。我们把钢筋砼实体梁的强度公式予以修正,使之适用于圆形孔洞的梁。在弯矩与扭矩的不同组合下,我们对十根梁进行了试验。本文介绍并讨论了这些梁的试验结果,并与理论计算值进行了比较。
The research work was conducted on beams with small holes in the transverse direction under the joint action of bending and twisting. According to the oblique bending model, when deriving the strength calculation formulas for type 1, 2 and 3 failure modes, it is assumed that appropriate reinforcements are provided around the holes. We modified the strength formula of reinforced concrete beams to make them suitable for beams with circular holes. In the different combinations of bending moments and torques, we tested ten beams. This article describes and discusses the test results of these beams and compares them with theoretical calculations.