engleski

The extended N2 method in seismic design of frames considering semi-rigid joints

In this paper the nonlinear static seismic analysis of typical steel moment resisting frame including the real joint stiffness (instead of traditionally design with pinned or rigid joints) is presented. In order to take into account the real joint behaviour in seismic analysis nonlinear analysis using the finite element method of welded beam-to- column joint was carried out firstly. The beam-to- column joints of analysed structure was chosen according to experimental tests. The results of finite element analysis obtained in program Abaqus 6.12 are shown in the form of the moment-rotation curve. Nonlinear moment-rotation curve will be idealized by tree-linear curve for the purpose of seismic analysis. The idea of this research is to show the influence of semi-rigid joints on the seismic effects for moment resisting frames. The storey drifts and displacements obtained from seismic analysis for steel frame including semi-rigid joints is compared with results for steel frame with traditionally rigid joins.

seismic analysis; moment resisting steel frame; semi-rigid joints; numerical analysis; nonlinear static N2 method

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