STAAD.Pro 帮助 验证示例V.12 Composite ProfilesV. Property Calculation V. Property Calculation V. CFST - Pipe - EQ MethodVerify the composite section properties of a round concrete-filled steel tube (CFST) using the equivelant steel section method.V. CFST - Tube - EQ MethodVerify the composite section properties of a rectangular concrete-filled steel tube (CFST) using the equivelant steel section method.V. CFST - Pipe - CS MethodVerify the composite section properties of a round concrete-filled steel tube (CFST) using the composite sum method.V. CFST - Tube - CS MethodVerify the composite section properties of a rectangular concrete-filled steel tube (CFST) using the composite sum method.