ANALYSES OF STRUCTURAL TYPE SELECTION FOR THE LONG-SPAN ROOF OF A GYMNASIUM CONSIDERING HURRICANE

Analyses of structural form selection of a gymnasium in the Philippines were carried out．The maximum wind speed for design is 215 km/h,the wind force is 17 level and it belongs to hurricane．Therefore,the designs of long-span roof become especially difficult．The lower natatorium roof was used to be the top roof's supports and stand．The top roof was a long-span space steel truss structure which had a span dimension of 130.0m31.0m．Considering the characteristics such as roof being large span and its overall structure being super-long,the plane pipe truss was used in top roof and the spatial triangle pipe truss structure was used in the lower roof and stands．Due to comparison and selection of different structure schemes,pipe truss structure,space truss structure set with pulling up and down prestressed cable,space truss structure with pulling up prestressed cable and self-balance steel-tube filled with concrete were selected．Analyses models were built and the nonlinear analyses were performed．Structural deflection,members dimension,structural materials,and construction difficulties were investigated,it was found that scheme 3 had a good economy and structural performance,which was suitable for long-span structures under hurricane．The research results can be referenced by designing other similar long-span structures．