چکیده مقاله
In the field of civil engineering, structural optimization for static loads is a well known concept However, ensuring an optimum design under seismic loadings faces many challenges, such as time dependent behavior of constraints, changes the design space over time, and the cost of gradients calculations To prevent such difficulties, response spectrum analysis has been implemented for the seismic analysis of structures instead of using the time history method In order to guarantee the global optimum design, the obtained results from gradient based method SQP were compared with those of the discrete optimization technique GA In the classic approach, the forward finite difference method has been used for gradient calculation and sensitivity analysis Static analysis is done using finite element method Consistent mass matrix has been used to avoid simplifying assumptions like shear frame By considering the geometric stiffness of the structure, secondary effects have been taken into account for linear elastic static and seismic analysis After calculation of the elastic response spectrum of the desired earthquake, response spectrum analysis is performed The capability of these methods is demonstrated by solving numerical examples of low, intermediate and high rise braced and unbraced steel frames, while satisfying the allowable stress design provisions of the national building code NBC The results are compared with each other and the most economical structural system with respect to the height has been determined
کلیدواژهها
نویسندگان
Mahshad Heydari
Bachelor of Science in Civil Engineering, Urmia Branch, Urmia University of Technology, Iran
شیوه ارجاع
Heydari, Mahshad,1404,Seismic Optimum Design of Steel Frames,Third International Conference on applied researches in civil engineering, architecture and urban planning
ارائهشده در
مجموعه مقالات سومین کنفرانس بین المللی پژوهش های کاربردی در مهندسی عمران، معماری و شهرسازی30 آبان 1404