Based On The Semi-rigid Portal Frame System Theory And Performance

The issuance of the "Tenth-Five-Year Program" of the Steel Structure Industry of China and the Compendium of the Developing Layout before 2015(draft) supplies a great of opportunities for developing light steel structure in China . Nevertheless, nowadays the development of steel structure is still in elementary stage in China , and the present research in this field is not enough Thereby ,it is important as well as meaningful to make some deep researches for system and capability of the light steel structure.In this paper ,the mechanical calculating model for portal steel structure has been founded after referring volumes information about portal steel structure from domestic and abroad ,and the main attentions are focused on structural optimization, semi-rigid connection, and secondary stress. The modeling and analysis have been carried out in ANSYS APDL and the impact of steel dosage and semi-rigid connection on structure mechanical capability and the secondary stress on internal stress.At present ,the research about how to economize steel dosage is focused on using various sections in the same beam or column, and the semi-rigid theory has been adopted to economizing the amount of steel in this paper.In this paper , through a great deal of calculating .analysis, and regressing ,we can get a more practical and meaningful guidance for the practical project.