The Compatible Stress Field Method is compliant with modern design codes. As the calculation models only use standard material properties, the partial safety factor format prescribed in the design codes can be applied without any adaptation. In this way, the input loads are factored, and the characteristic material properties are reduced using the respective strength reduction factors, exactly as in conventional concrete analysis.
Values of strength reduction factors are prescribed in AASHTO LRFD (2024) Article 5.5.4 and for anchors in ACI 318-19 Chapter 17 and AASHTO LRFD (2024) Article 6.5.4.2.
\[ \textsf{\textit{\footnotesize{Fig. 51\qquad The setting of strength reduction factors in IDEA StatiCa Detail.}}}\]
Load factors and load combinations shall be defined according to AASHTO LRFD Bridge Design Specifications (2024), Article 3.4.1 and Tables 3.4.1-1 to 3.4.1-6. AASHTO LRFD explicitly specifies the Strength limit-state load combinations (Strength I to Strength V), including the corresponding load factors for each case.
\[ \textsf{\textit{\footnotesize{Fig. 52\qquad The setting of load factors in Idea StatiCa Detail.}}}\]