Truss structure of triangle-section concrete-filled steel tube

Abstract

The invention provides a truss structure of a triangle-section concrete-filled steel tube. The truss structure comprises three chord members and plural web members, wherein the three chord members are distributed in a triangle shape and form a three-dimensional space structure by connecting the plural web members; the chord members comprise steel tubes and concrete; the sections of the steel tubes are in the triangle shape; the steel tubes are filled with the concrete; the web members are steel-plate-shaped web members. In the truss structure, the three chord members are distributed in the triangle shape and are steel tubes with the triangular sections, so that the flexural rigidity is high, further, the chord members are filled with the concrete, and the concrete is limited by the steel tubes, so that the bearing capacity, the plasticity and the toughness of components are improved; the web members are directly welded on the steel tubes with the triangular sections, so that gusset plates can be omitted, and the connection is very convenient.

Description

【Technical field】 [0001] The invention relates to the field of civil engineering, in particular to a steel pipe concrete truss structure with a triangular section. 【Background technique】 [0002] When the slenderness ratio of the member is large, the bending stiffness of a single CFST member is low, and it is prone to instability, and it is difficult to give full play to the material properties of the steel pipe and concrete. Usually, a truss structure can be used. The truss structure can obtain a larger section bending stiffness through a smaller size chord, so it has a higher bearing capacity. Concrete filled steel tubes are used in the space truss structure, which has good mechanical performance, so it is widely used in long-span structures. In concrete-filled steel tube trusses, steel tubes are the most commonly used form of connecting webs, and the construction of intersecting lines between them and concrete-filled steel tube chords is relatively difficult, the stress ...

AI Technical Summary

Problems solved by technology

However, the steel pipes are mainly circular cross-section steel pipes, and the connecting webs are steel pipes, which will make the construction of the intersecting line with the CFST chord more difficult, the stress of the weld seam is complicated, and the connection quality is difficult to guarantee

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