نوع مقاله : مقاله پژوهشی
عنوان مقاله English
نویسندگان English
Beam-column connection have a significant role on the results of analysis and design of steel structures. In this paper, a genetic algorithm has been used for non-linear analysis and design of steel frames. In this paper for minimized the weight of frame by satisfying the applied constraint and restraints such as amount of axial and combined stresses, target displacement and the number and location of plastic hinges criteria was used.
To analyze and design the frame elements, I and Box shape standard sections have been used for beams and columns, respectively. Finally, semi-rigid connection stiffness allocated to the beam to column connection will be obtained. The degrees of these rigidities are made by genetic algorithm during the procedure of optimization in order to finally result in the creation of a frame with the minimum weight.
To perform modal analysis, linear static and non-linear static operations as well as design of elements, SAP2000 software and to perform the optimization procedure, the program written in MATLAB software domain have been used. Optimization procedure based on weight minimization for 9 steel frames have done, therefore connection stiffness could obtain when the structure weight is minimized. The results of selected frames by assuming rigid and semi-rigid connection, linear and non-linear static (pushover) analysis are compared. The results showed that, for short period frames with rigid connections, non-linear analysis give less weight, but with increasing period of frames least weight are obtained in non-linear analysis with semi-rigid connections.
کلیدواژهها English
