Showing posts from January, 2017

Understanding Inclined Columns

Introduction A vertical structural member subjected to axial compression in the majority with some or no moment is termed as a column. If the same member is inclined, it is a strut. But all these members in common are subjected to compression in the majority and they are categorized as strut members. 



Column Buckling Resistance - A Clue By An Aquatic Living

Isn't that amazing, when an aquatic living gives a clue on a theory behind a new concept for the resistance of building components against buckling?
As a part of research by the Brown University engineers, relating to the determination of shape that would help in increasing the buckling resistance of building structural components, lead to the study of an aquatic living named the "sea sponge", as shown in figure 1. The study progressed with the realization of the sea sponge structure and the structure configuration within the living, that helps in maintaining the structure symmetry and their spherical arrangement under higher pressure. This ability is due to the presence of structural rods, with an optimal shape that would help the living to resist against the buckling pressure. Structural Rods For Resistance The structural rods are called as strongyloxea spicules, that have a length of 2mm and thinner than the human hair. These rods are in hundreds that are compiled to…

Supports and Restraints in Structural Analysis

Types of Supports and Restraints in Structural Analysis In order to clearly understand the concept of indeterminacies, let us first discuss on supports and restraints. Most structures are either partly or completely restrained so that they cannot move freely in space. Such restrictions on the free motion of a body are called restraints and are supplied by supports that connect the structure to some external stationary body.

For example, consider a planar structure such as the bar AB shown in Figure (a). This bar would move freely in space with some combined translatory and rotational motion, if this bar were a free body and were acted upon by a force P. If a restraint were introduced in the form of a hinge that connected the bar to some stationary body at point A, then the motion of the body will be only of rotational movement about the hinge (Figure (b)). However, point B would move along an arc with point A as the center. Therefore, another restraint is required at B to prevent comp…