Abstract：The reason for the difficulty in calculating RC members subjected to axial loads and biaxial bending is that the non-linearity of the reinforcement and concrete materials makes the superposition principle invalid, that is, it cannot be calculated by superposing the calculation results of unidirectional eccentricity. Nowadays, by assuming the correlation curve between the bidirectional moments and the axial force as the ultimate bearing capacity curve, the calculation accuracy and the feasibility of the assumption are poor; numerical calculation and iterative solution can be used to meet the requirements on accuracy, but they are difficult to be applied in practice and hand calculation is almost infeasible. In view of this situation, the inverse algorithm, in which the stresses and the internal force can be calculated without resorting to the iterative method and the superposition principle, is used with good calculation accuracy. In order to facilitate its application, a dimensionless nomogram for the calculation of reinforcement is charted in this work. By comparing this chart with the numerical calculation result, good agreements can be achieved. In addition, the nomogram also has the following advantages: simple and fast calculation, strong applicability, applicable for any cross-sectional size and any strength grade of concrete.
双超 周东华 李露 兰树伟. 钢筋混凝土双向偏压构件正截面承载力的图算法[J]. 土木工程学报, 2020, 53(9): 77-84.
Shuang Chao Zhou Donghua Li Lu Lan Shuwei. Graph algorithm on normal section bearing capacity of RC #br#
members subjected to axial loads and biaxial bending. 土木工程学报, 2020, 53(9): 77-84.
