Light steel roof system with knee brace and stay as purlin support points

Abstract

Theinvention discloses a light steel roof system with a knee brace and a stay as purlin support points. The light steel roof system comprises a steel beam, purlins, knee braces, stays, a purlin support and connecting boards, wherein the purlin support is fixedly connected at the top surface of the top flange of the steel beam, the purlin support is fixedly connected with the middles of the purlins, the purlins and the steel beam are vertically arranged, the connecting boards are fixedly connected between two sides of the bottom flange of the steel beam and a web plate, two ends of each of the purlins are connected with the knee braces, and the knee braces are slantly connected between the purlins and the connecting boards; the stays are connected between two adjacent purlins; and the stays are connected between any positions of two adjacent purlins or two adjacent purlins at the connection point of the knee braces and the purlins through stay angle cleats. In the light steel roof system, a stable space force system is formed, the calculated length of the inner surface and the outer surface of each purlin is reduced, the design requirement of the purlins is met, and the overall space force performance of the roof system is improved; and the light steel roof system can be widely used in design of the light steel structure roof comprising the steel beams, purlins, knee braces and stays.

Description

technical field [0001] The invention relates to a light steel roof purlin system, in particular to a light steel roof system with corner bracing bars as purlin fulcrums, which can be widely used in roof purlin systems of light steel factory buildings. Background technique [0002] In light steel workshops, the entire building consists of a structural system and an enclosure system. The structural system is composed of portal frame, facade support, and roof horizontal support system, forming a stable frame. The enclosure system is composed of a roof system and a wall system, which are attached to the structural system to form a complete light steel structure factory building that meets the functional requirements. [0003] In the roof enclosure system, it is mainly composed of purlins, corner braces, braces and roof panels. The roof panels are fixed on the purlins with self-tapping screws or fixing seats, and the purlins are fixed on the portal frame through the purlin supp...

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the disadvantages of the existing purlin system, such as the weak local stiffness of the purlins at the connection points of the braces and the looseness of the braces, and the shortcomings of no restraint stiffness outside the plane of the connection of the corner brace purlins, the present invention proposes a corner brace brace as the purlin fulcrum The light steel roof system: by improving the connection node method of the braces, the axial stiffness of the braces is increased, and the relaxation of the braces is reduced; the out-of-plane displacement of the purlins is restricted by setting braces at the connection of the corner purlins, and the lateral direction of the purlins is improved. Rigidity can meet the assumed conditions of the corner brace as the fulcrum of the purlin, form a space force system, and effectively reduce the effective calculation length of the purlin

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