Sizing of metal structures in substations
metal structures have played an important role in the development of engineering projects and the sizing of these structures is extremely relevant, being performed in order to resist various conditions, whether climate, project usual and abnormal to daily life. These factors are of utmost importance as the collapse of a structure can cause damage to the design and the safety of people who travel in the place.
for the sizing of metal structures, agreements between national (NBR 5422) and international (IEC60865-1) are directed. With these standards, it is possible to elaborate calculation memories that directly contribute to predictable factors listed to conventional calculations of sizing. Among these factors, we can cite static and dynamic efforts, weather conditions and weight.
static efforts refer to the actions of horizontal forces from the stretching of substation buses (such efforts also generate the effect called moment). Analogs to these, dynamic efforts are characterized as abnormal situations to the daily bus (short circuit) where the structure tends to suffer a greater effort with the mechanical effects of a short circuit.
climatic conditions are also of great importance in giving data for sizing, where climatic data such as wind speed and wind pressure calculation by region are arranged in NBR 5422.
