平面桁架(国外英文资料).docVIP

平面桁架(国外英文资料) FAQ: 7 Chapter 7 the plane truss What are the two types of housing structure? How does it apply? Answer: the structure system of the house is divided into unpurpurate house cover and the cover of purlin house. (1) no purlin roof: no purlin house covers are used for heavy roofing, such as large roof panels of prestressed concrete, and the roof panels are placed directly on the shelf or skylight shelf. The span of prestressed concrete large roofing panels is usually made of 6m and 12m when conditions are available. When the column spacing is larger than the roof panel used, the bracket shall be supported by the bracket. (2) there is a purlin roof: there is a purlin roof which is often used for light roofing materials. Such as pressure type, aluminum alloy plate, asbestos tile, corrugated iron, etc. Between asbestos and corrugated iron roofing, the distance between the frames is usually 6m. When the column spacing is greater than or equal to 12m, the bracket is supported by the bracket. Steel plate and pressed aluminum alloy plate roof, the frame spacing is often greater than or equal to 12m. What are the common shelves? What are the characteristics and the applicable? A: the shape of the frame is triangular, trapezoid, parallel string and herringbone. Triangle truss suitable for steep slope roof (I 1/3) have purlin roof system, usually with pillars articulated, housing overall low lateral stiffness, simply supported roof truss chord joints of internal force is big, across internal force is small, in the cross section cant give full play to the role. The position of the lower chord of the lower chord of the support is large and the structure of the support node is complicated. The ventral pole of the triangular roof is decorated with a fink and a human character. Fink type is more, but the lever is short, the pull rod is long, the force is relatively reasonable, and can be divided into two little trusses to make and transport, more convenient. There are