![]() When the structure is 2-dimensional, and the imposed loads are exercised in the same 2D plane, there are just three resultant actions of interest: Typically, when performing a static analysis of a load bearing structure, the internal forces and moments, as well as the deflections must be calculated. The fixed beam is an indeterminate (or redundant) structure. Redundant structures can tolerate one or more local failures before they become mechanisms. To the contrary, a structure that features more supports than required to restrict its free movements is called redundant or indeterminate structure. If a local failure occurs to these, they would collapse. The structures that offer no redundancy, are called critical or determinant structures. In this situation the structure could move without restriction in one or more directions. To the contrary, a structure without redundancy, would turn to a mechanism, if any of its supports were removed. In other words the fixed beam offers redundancy in terms of supports. Indeed the second fixed support could be removed entirely, turning the structure to a cantilever beam, which is still a sound load bearing structure. The fixed beam features more supports than required to be statically sound. The fixed beam features two fixed supports, one at each end Restraining rotations results in zero slope at the two ends, as illustrated in the following figure. ![]() Fixed supports inhibit all movement, including vertical or horizontal displacements as well as rotations. It features only two supports, both of them fixed ones. The Postprocess module is used to plot the responses of the beam from the analysis, including force diagrams and deflections.įor an in-depth understanding and how to customize the existing planeSections library classes and methods, check the documenation.The fixed beam (also called clamped beam) is one of the most simple structures.The Diagram module is used to plot the beam model.The Analysis module is used to analyze the beam using OpenSeesPy and document the results.The beam class is the core class of the module, and the one the user interacts with the most. The Builder module is used to create the beam and beam elements.PlaneSection library has four core modules which are as follows: Being built on OpenSees, the structural results are reliable, and there is lots of room to create more complex models. The aim of PlaneSections is to make beam analyses easier, which can be used to document structural calculations quickly. PlaneSections is a lightweight finite element beam bending library built on OpenSeesPy. ![]() Hence, for those of us with an interest in developing finite element tools for structural analysis, this instructable is about how to create a simple beam model and plot its shear force and bending moment diagram using a python library called planeSections created by csbloom which is built upon openseesPy ![]() This analysis and cross-checking are tedious and time-consuming when verifying our results by hand. In addition, when given a reinforced concrete design project, we also start by analyzing our beam elements, which transfer wall and slab load to columns and from column to foundation. This gets more complicated when doing beam analysis, as we are trying to get what our beam element's shear force and bending moment diagram will look like. For those of us taking structural mechanics and strength of materials courses, we all know how difficult it can get when trying to verify our analysis results.
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