D2.B.2 Analysis Methodology
D2.B.2.1 Elastic Analysis
Two types of elastic analysis can be performed using STAAD.Pro in accordance with AS 4100:
- First Order Linear, Elastic Analysis - used to perform a regular elastic stiffness analysis as per AS 4100 184.108.40.206. Refer to TR.37.1 Linear Elastic Analysis for additional details on this feature.
Second Order PDelta Linear, Elastic Analysis - Depending on the type of structure, a PDelta analysis may be required in order to capture second-order effects as per AS 4100 220.127.116.11. Second-order effects can be captured in STAAD.Pro by performing a PDelta second-order elastic analysis as per AS 4100 Appendix E. Refer to TR.37.2 P-Delta Analysis Options for additional details on this feature.Tip: In order to correctly capture second-order effects for combination load cases using a PDelta Analysis, the Repeat Load feature must be used. Second-order effects will not be correctly evaluated if the Load Combination feature is used. Load Combinations are combinations of results where Repeat Loads instruct the program to perform the analysis on the combined load actions. Refer to TR.32.11 Repeat Load Specification for additional details on using Repeat Loads.
D2.B.2.2 Dynamic Analysis
Dynamic analysis may also be performed and the results combined with static analysis results. Refer TR.32.10 Dynamic Loading Specification for further information on Dynamic Loading and Analysis features.