Optimization scheme of portal steel structure
First of all, we need to know what is the ‘ Portal steel structure ’, it’s a flat structure made of steel , which is composed of variable cross-section columns and variable cross-section sloped beams. It ’ s widely used in the steel structure of single-storey industrial and civil houses, such as single span, double span or multi span single and double slope portal steel structure. Its optimization method is similar to the steel structure space frame , the optimization scheme of portal steel structure also adopt the asymptotic full stress method, that is, the section size of portal steel structure members is selected and modifies through multiple calculations and analysis to make it reach or close to the full stress stats as far as possible until the section size of all members of portal steel structure does not need to be modified, so as to minimize the amount of steel and achieve the lowest cost of optimization goal. The modification of component section size is also the optimizat