Irregularity index for quick identification of worst column removal scenarios of RC frame structures

• Published in: Engineering structures Vol. 178; pp. 191 - 205
• Main Authors: He, Xiao-Huang-Can, Yuan, Xian-Xun, Yi, Wei-Jian
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.01.2019; Elsevier BV
• Subjects: Architecture; Building construction; Columns (structural); Commercial buildings; Correlation analysis; Correlation coefficient; Correlation coefficients; Design standards; Disproportionate collapse; Failure mechanisms; Finite element method; Frame structures; Irregularities; Irregularity index; Layouts; Limit load; Mathematical analysis; Mathematical models; Numerical analysis; Public buildings; Quantitative analysis; Reinforced concrete; Reliability analysis; Sensitivity analysis; Three dimensional models; Disproportionate collapse; Frame structures; Irregularity index

•An index was proposed to measure geometrical irregularity of RC frame structures.•The index, Π was derived by yield line mechanism and tensile membrane action.•Very high correlation exists between Π and collapse resistance of frame structures.•The index can be used to identify the worst column remo...