![]() ![]() ![]() Most engineers are used to the first-order (linear) elastic analysis method. This graph illustrates the response of the structure depending on what structural analysis method is used. For example, if a new frame is to be designed to come up with the member sizes, engineers may use p-delta (P-Δ) analysis with effects of small p-delta (p-δ) included etc.įigure 1: Frame subjected to lateral and gravity loadsįigure 2 shows a plot of levels of structural analysis and behavior they produce (i.e. There are several analysis options available to the engineer to analyze this frame depending on what is the final goal. This frame could be a new or existing structure. The following figure illustrates a steel frame with some gravity and lateral loading. 2.0 LINEAR STATIC AND P-DELTA (P-Δ) ANALYSIS: Note that the non-linear and pushover analysis features in STAAD.Pro V8i are a part of the "Advanced Analysis License" which is an add-on. The goal of this article is to offer a basic overview of features such as Linear static, P-Delta, small P-Delta, stress stiffening, and geometric non-linearity and how they are implemented in STAAD.Pro. This blog is for engineers who are trying to explore structural analysis methods implemented in structural analysis software such as STAAD.Pro V8i. I have found that the meaning of the word "non-linear" can vary depending upon what the engineer may want to do. There are terms that will be thrown out at me such as second order analysis, plastic analysis etc. 1.0 INTRODUCTION:įeatures such as non-linear analysis of a structure seems to be a grey area to me sometimes. ![]() Bulent Alemdar, FEA Specialist and Santanu Das, VP, Integrated Engineering Group for reviewing this article in detail and providing their valuable feedback. Thanks to Ray Cutis, Senior Advisory Software Developer for all the help that he has offered me to write this article. Ravi Ozarker, P.Eng., Applications Engineer, Bentley Systems Inc. ANALYSIS OF STEEL STRUCTURES IN STAAD.Pro ![]()
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