Research on Application of BRBs in Steel Frame Structures

Abstract

This paper presents an analysis on the seismic behavior of buckling-restrained brace frames（BRBFs）with different rigidity ratios by the finite element analysis software ANSYS. Based on the elastic-plastic time-history analysis, the relationships of maximum story drift ratio and the uniformity of maximum story drift ratio with different rigidity ratios are established for BRBFs subjected to large earthquakes, a reasonable range of rigidity ratio is recommended, which is the reference for the design of BRBFs.

Optimization Research on Geometric Parameters of Scallop-Shaped Lattice Shells

“…According to the difficulty levels of the optimization, structure optimization of the regular lattice shell can be classified into component-section optimization, shape optimization, topologic optimization, and structural system optimization, etc. There are many scholars doing research on the optimization for the regular lattice shells [4][5][6], but few of them relate the geometric optimization to the free-form lattice shell. In the design process of sun valley steel structure for Expo Axis project, based on the computer aided geometric design, the integration finite element analysis (FEA) technique and the shape optimization for the free-form surface were presented to achieve the surface of zero bending stress and the smallest membrane stress [7].…”