Analysis And Research On The Selection Of Basic Structure Of Rural Residential Frame Based On A Special-shaped Concrete-filled Steel Tube Column In Yunnan

In order to promote the future application of special-shaped concrete-filled steel tube columns in rural housing projects in Yunnan,this paper proposes an RT special-shaped concrete-filled steel tube column by comparing ordinary special-shaped concrete-filled steel tube columns.The performance of the L-shaped concrete-filled steel tube columns of two structural forms was compared in the axial compression test.On this basis,the research team further proposed a basic structural system of special-shaped concrete-filled steel tube column residential frame that is suitable for the combination of Yunnan regional climate and different seismic fortifications.The structural structu re selection principle and the overall structural system of the structural system were carried out.Analysis and design method research.Mainly include the following:(1)The current research status of special-shaped concrete-filled steel tube columns at home and abroad are reviewed,and the different structural composition,theoretical calculation of bearing capacity,axial and eccentric pressure properties of typical special-shaped concrete-filled steel tube columns are analyzed and studied,and the frame structure design of special-shaped concrete-filled steel tube columns is aimed at The structural needs of residential buildings in Yunnan villages and towns,and the research of this paper is proposed.(2)For the proposed RT special-shaped concrete-filled steel tube columns,the axial compression test of ordinary special-shaped concrete-filled steel tube columns and RT special-shaped concrete-filled steel tube columns was carried out to analyze the failure modes and tests of ordinary special-shaped concrete-filled steel tube columns and RT special-shaped concrete-filled steel tube columns.Mechanical properties such as late ductility,steel pipe strain analysis and ultimate bearing capacity.(3)In order to deepen the engineering application of special-shaped concrete-filled steel tube columns in Yunnan,according to Yunnan’s geographic and geomorphic,regional climate and earthquake conditions,the construction selection principle of the basic structure system of the special-shaped concrete-filled steel tube column residential frame was put forward.The main frame selection,basic composition,key node composition of the basic structural system,and the selection and connection of the enclosure system after considering the regional climate have been analyzed and researched.(4)According to the regional climate of Yunnan and the design standards for energy efficiency of civil buildings in Yunnan,the enclosure system is selected;the basic structural system design and analysis model of the rural housing fram ework is determined according to the characteristics of the opening and depth of the ethnic residential buildings in Yunnan;the fortification intensity and climate in Yunnan are comprehensively considered Based on the regional relationship,the finite ele ment analysis method is used to analyze and compare the overall structure,and a set of basic structural system of Yunnan Province village and town housing frame structure based on special-shaped concrete-filled steel tube columns is proposed.The seismic performance design analysis method under different seismic fortification intensities and regional climate is proposed.