Simplified Algorithm of Structural Reliability Index under Condition of Correlated Variables

Based on the geometrical meaningof structural reliability index, the direct iteration calculation of a nonlinear function under the condition of correlated variables was discussed by using coordinate transformation and matrix operation. The calculation formulas based on the contribution value method was derived, and two numerical examples were given. The calculational results show that compared with the traditonal algorithms, this algorithm is simple in calculation and high in precisio