Truss Structures

Truss structures consist of straight members which are joint together at their ends. As a result the geometry of a truss contains only triangles. However in reality there is no ideal frictionless joint, but the connection points of truss members can be assumed as ideal joint. By this simplification assumption, the only force in truss members is […]

Centroid and Center of Gravity

Centroid and center of gravity are two important concepts in statics. However in static problems we always assume that the weight force is a concentrated force, but in reality the force is applied on all particles of the body. in fact we replace that all of these small forces by a single equivalent force (the […]

ETABS Introduction

What is ETABS? This question might seem a bit trivial at the first look. But for new users these kinds of  basic information can accelerate their learning process. Since 3 decades ago, different pieces of engineering software has been significantly developed. Building constructions has fueled the need for building design software. Among all, ETABS is identified […]

Finite Element Method

Finite elements method is quite easy in comparison with analytical methods, , however if the user misuse it the outcome will be inaccurate or even wrong. As a result, any numerical model must be verified by experiments or field measurements. Only then the model is acceptable for use. Since there is no specific guidelines for […]

Lime soil stabilization

Lime soil stabilization method is a unique technic to improve the strength of the soil in different projects such as road buildings. Briefly, adding lime increases the soil stability, bearing capacity and reduce its  permeability. The high efficiency of this method has been proven by many projects all over the world. It is noteworthy that […]