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Steel structure is a structure in the form of a greater advantage , with the rapid development of China's economic construction , substantial increase in steel production , the rapid development of the steel structure in our country . Abroad , the steel structure technology is more mature , has a construction of all types of residential , there are many sound system in low-rise residential . China 's steel structure house is still in the exploratory infancy, it is a future residential development direction . And people mostly think that the high cost of residential steel so that its optimized design, whether in terms of to save steel sector, or to improve the force is very meaningful . In this paper, the optimal design , using traditional optimization methods (composite method ) and ANSYS optimization module ( first-order method ) to optimize the design of the structure . Optimize complex method taken to seek a cross-sectional moment of inertia of the optimal distribution and member section to optimize two . The lightest weight of the steel frame residential as the objective function and constraints fully consider the strength, stiffness, and overall stability and local stability , and then come to the conclusion of the two ways to do comparison , we can see , the first-order method is more provincial effort, especially with the increase in the number of variables in the construct composite shape becomes very troublesome , and order resulting from the final results , and better than complex method .
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