Vector Mechanics - structural analysis - Armor [Basic concept]

¡Hi steemians! the structural analysis It is extremely important for the knowledge of a civil engineer since it refers to the use of the equations of the resistance of materials to find the internal efforts, deformations and tensions that act on a resistant structure, like buildings or resistant skeletons of machinery.

The cases related to rigid bodies and forces in balance have been the antecedent to know now about the armors, which are nothing more than structures formed by rigid elements joined together. In these cases the external forces that act on the structure will be determined and the internal forces that hold their parts together will be analyzed.

Armor

It is one of the main types of structures used in engineering. This provides a practical and economical solution for many engineering situations, especially for the design of bridges and buildings.

An armature consists of straight elements that are connected in nodes, the elements of the armature are only connected at the ends; therefore, no element continues beyond a node.

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The elements of an armor, in general, can only support small lateral loads; That's why all the charges must be on the nodes and not on the elements.

simple armor

The Static Analysis of a simple structure deals with the knowledge of the characteristics and their behavior under a certain state of burdens; study of its behavior of its states of tension and compression, showing how to determine the forces in the elements of the reinforcement, by means of the method of nodes. By analyzing the structure is to predict their behavior under the different actions for which it can be useful and establish what should be able to respond.

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Nodes

 the nodes are the connections between each member. The forces that act on them are reduced to a single point, because they are the same forces transmitted from the axes of the extremities. A member can never cross the nodes. The connections at the nodes are usually formed by bolts or welds at the ends of the members attached to a common plate called the junction plate.

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Armor analysis using the nodes method

The method of the nodes, consists of the approach of the mechanical balance of each one of the knots or knots of a simple reinforcement. A node is each of the points where two or more bars concur. The general equilibrium of the structure implies that the local equilibrium of each of the nodes. In order for the method of the nodes to be applicable to a specific structure, some geometric conditions must be met between them:

1. That the structure has articulated nodes or behave similarly to a structure of articulated nodes.
2. That the number of bars is less than a certain amount given by the number of bars.

For two-dimensional armors with work forces in their plane, If the number of bars is smaller, there is a mechanism for which the equilibrium can not exist, and if the number of bars is greater, the unknown number of voltages exceeds that of the equations linearly independent statics.

For more information, visit the following link:

http://metododelosnodos.blogspot.com/

https://es.slideshare.net/WilderBarzola/anlisis-estructural-de-una-armadura-simple

https://es.wikipedia.org/wiki/An%C3%A1lisis_estructural