Factors affecting the seismic performance of RBS truss chord members under combined axial–bending–shear loading

Abstract

In recent years, the outrigger truss has been widely used in super high-rise buildings. How to improve the seismic performance of the outrigger truss has become an important research front. It has been shown that the Reduced Beam Section (RBS) can perform local damage control and maximize the node guarantee. Connection performance, so in the super high-rise structure, Reduced Beam Section (RBS) truss chord can be used to improve the structural reliability, but the existing research on dog-bone joints is mostly the seismic performance of the bending-shear coupling node. There are few experimental studies on the seismic performance of dog-bone joints under compression-bending-shear coupling. In this paper, combined with the content of "structural reliability", considering the uncertainty of the structural resistance coefficient of steel structure, such as material properties, geometric parameters, calculation mode, etc., through the finite element simulation, the compression-bending-shear coupling of RBS truss chord The seismic performance under the action is studied, and the reliable index of the RBS chord string function function is solved. The research results of this paper provide reference for designers of super high-rise structures.