This analytical study aims to investigate the flexural behavior of simply supported RC beams having longitudinal hole with circle cross section under monotonic two point loads. The commercial FE program ABAQUS was used for simulating and implementing the specimens behavior that tested experimentally in previous researches. The overall specimens investigated were thirteen RC rectangular beam specimen, the first one was solid while the others with longitudinal circular hole. The specimens with holes divided into three groups, each one has a specified hole diameter 25 mm, 40 mm, and 50 mm. The distance from center of hole to the top section face was variable where the hole would be completely in the stress block, below it, or partially within it. The validity of the simulated model were verified by comparing the available load deflection data with the implemented one, where good agreement were noticed. The simulated models could introduce the ultimate load, first cracking load and its propagation in addition to the maximum attended deflection. It is concluded that the existence of a longitudinal hole with a percentage of diameter to beam depth ratio below 20% with different positions from top surface of the cross-section to the center of the hole values caused decreasing in ultimate load not exceeding 5% compared with the solid beam.

本分析研究旨在研究具有圆形横截面纵向孔的简支 RC 梁在单调两点载荷下的弯曲行为。商业有限元程序 ABAQUS 用于模拟和实现先前研究中通过实验测试的试样行为。研究的整体试件为 13 个 RC 矩形梁试件，第一个为实心试件，其他为纵向圆孔。带孔的试样分为三组，每组指定的孔径为 25 mm、40 mm 和 50 mm。从孔中心到顶部截面的距离是可变的，其中孔将完全在应力块中、在其下方或部分在应力块内。通过将可用的载荷挠度数据与实施的数据进行比较，验证了模拟模型的有效性，其中注意到良好的一致性。除了最大参与挠度之外，模拟模型还可以引入极限载荷、首次开裂载荷及其传播。得出的结论是，从横截面顶面到孔中心的不同位置，存在直径与梁深比小于 20% 的纵向孔，导致极限载荷下降不超过 5%。与实心梁。