Abstract
Based on refined plastic hinge, this paper considers the effects of second-order effects of structure plastic strength, geometric imperfection ,residual stresses to the structure stability by modifying the element stiffness matrix. Use the modified element stiffness matrix to analyze the force of the staggered truss of steel sturcture and compare the calculation results with ANASYS’s. Use the modified element stiffness matrix to analyze interstory drift of the staggered truss of steel sturcture and compare the calculation results with K Jim’s. The result shows that the developed element matrix can accurately calculate the stability capacity and interstory drift of the staggered truss of steel structure. Design by advanced analysis method is the direction of the analysis and design of modern steel structure.
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