Research on Reinforcement Technology of Grid Bars with Oversized Slenderness Ratio

Abstract

The stiffness of axially loaded members is usually measured by slenderness ratio, which is the ratio of the calculated length of the member to the minimum turning radius of the member section. If the slenderness ratio is too large, the component is easy to produce bending deformation in the process of use. Under the action of dynamic load, it will produce large amplitude vibration, and it is easy to produce bending deformation in the process of transportation and installation. Therefore, the slenderness ratio of the component should be controlled in the design to make it not exceed the allowable slenderness ratio specified in the specification. Aiming at the problem that the slenderness ratio of space truss exceeds the limit, this paper puts forward the method of reducing the calculated length of members by adding supporting members or auxiliary members, so as to reduce the slenderness ratio of members, and studies the influence of increasing supporting members on the bearing capacity, deformation and seismic performance of space truss, so as to provide theoretical basis and guidance for the implementation of the reinforcement method.