Reinforced Concrete (RC) walls with openings are widely used in modern buildings due to their shear stiffness and effectiveness in implementing architectural ideas and solutions such as traffic flow, ventilation, lighting, etc. However, design practices often overlook the effects of openings, especially in designs in Vietnam. This study proposes to examine 3 simplified methods for calculating the shear capacity of this type of wall using approximate methods with reduced strength coefficients: Ono, AIJ, and Kitano modification. Verification results with 83 experimental samples, expressed as the ratio between the experimental critical shear force and the calculated value, show that the Ono and Kitano modification methods give higher calculated values compared to experiments, with average ratios of (0.95
0.98) and (0.92, 0.90) for push and pull load directions respectively. The AIJ calculation results are lower than experimental results with the average ratio of (1.11
1.10). The CoV coefficient shows that the Kitano modification method has the lowest result dispersion with a CoV of 0.16 for both force directions. Based on the survey and evaluation of the 3 methods, the author proposes a strength reduction factor of 0.708 when calculating the critical strength of RC walls using the AIJ method in design problems. The average ratio for the proposed coefficient is 1.56 and 1.55 for push and pull directions. The CoV value of 0.18 indicates that the results are entirely suitable for practical structural design problems. Trích dẫn: D.H. Thoi, L. Hoang, L.T.A. Hong (2024),A study on precdiction of shear strength of RC shear-wall with openings. Tạp chí Khoa học và Công nghệ Trường Đại học Xây dựng Miền Tây, số 10, tr. 21-20.