Prediction and analysis of shear capacity for T-shaped RC squat walls

T-shaped reinforced concrete (RC) walls are widely used in high-rise structures due to their high strength and stiffness in both principal directions. However, the enhancement of flexural resistance pro-vided by the flange in T-shaped RC walls increases their vulnerability to shear failure. Additionally, the flange under tension and compression states exerts different influences on the shear mechanism and shear capacity of T-shaped walls, increasing the difficulty of predicting shear capacity. Addressing these is-sues, this study conducted quasi-static tests on T-shaped RC squat walls and utilized finite element simulations to investigate the influence of parameters on shear capacity, and a calculation method for shear capacity is established using the strut-and-tie model. The results indicate that a higher shear capacity is achieved when the flange is in tension, accompanied by steeper diagonal cracks. The proposed method considers the influence of flanges under different loading states by adjusting the contribution of the con-crete diagonal compressive strut, and the maximum margin of error between experimental results is less than 15%.