| Title |
The Discrete Optimum Design of Steel Plane Trusses considering the Effects of Random Variables |
| Authors |
Jeong Se-Hyung ; Shon Su-Deok ; Oh Young-Dae ; Kang Moon-Myung |
| Keywords |
Stochastic Finite Element Method ; Reliability Index ; Optimum Design ; Second Moment Method ; Micro-Genetic Algorithms |
| Abstract |
This study is proposed to suggest reliability analysis and stochastical discrete optimum design method using stochastic finite element method(SFEM) for plane steel trusses. Usually there are a lot of uncertainties about the error of assumed load, material property, member size and structural analysis in structures. In existing deterministic method, the member design has been accomplished applying safety factor after structural analysis, but it is not enough to consider the uncertainties of structure above mentioned. Thus, in order to consider uncertainties of structure, it is proposed the stochastical analysis method of plane steel trusses using the reliability analysis method, SFEM and advanced first order second moment method(AFSOM). And the optimum method applied in this study is micro-genetic algorithms with stochastical discrete optimum design method in satisfaction of target reliability index. |