门式刚架轻钢厂房问题汇集（Problem collection of portal frame and light steel workshop）.doc

门式刚架轻钢厂房问题汇集（Problem collection of portal frame and light steel workshop） 1. The connection of gable column and rigid frame should be located on the rigid tie tie of roof support. 2, rigid tie, flexible tie bar? Both rigid tie bar under tension, a tension, slenderness ratio control to 180, can be controlled to 200; flexible tied only under tension, slenderness ratio can control up to 400. 3, expansion joints? 00000000000000000 4. The transverse bracing of the roof should be located at the first or second bays of the end of the temperature range. When the end support is located at the second bays, the rigid tie rod shall be provided at the corresponding position of the first bay. 5, the spacing between columns should be determined according to the longitudinal spacing of the building, the force condition and the installation condition. When no crane, take 30 ~ 45m; when the crane should be located in the middle of the temperature section, or when the temperature range is longer, should be located at three points, and the spacing should not be greater than 60m. 6, when the building width is greater than 60m, including column column bracing should be increased. 7, when the height of the house relative to the column spacing is large, column support should be layered. 8, in the frame of the turning point (single span to the side of the house tops and roof, and multi span houses some of the intermediate columns and roof) should be arranged along the length of the rigid tie bar. 9 、 horizontal frame composed of supporting inclined bar, the straight belly bar should be considered as rigid tie bar. 10. The span of a bridge crane with a cab and a weight greater than 15t. 11, the roof load level projection area 60m2. Have a great relationship with the 12 set collapse direction and inclined brace purlin, what parts of the ramp brace, what place can not be set on my understanding analysis here: diagonal brace, straight brace and poles to form a stable structure of the power syst