Second-order distributed plasticity analysis of steel frames with semi-rigid connections

作者：Thai Huu Tai; Kim Seung Eock^*

来源：Thin-Walled Structures, 2015, 94: 120-128.

DOI：10.1016/j.tws.2015.04.011

• Force-based element
• Fibre model
• Semi-rigid connection
• Steel frame

This paper proposes an accurately and efficiently numerical procedure for distributed plasticity analysis of semi-rigid steel frames. Both geometric and material nonlinearities are included in the proposed analysis. Geometric nonlinearities due to the large and small P-Delta effects are respectively captured using the corotational formulation and curvature-based displacement procedure. Material nonlinearities due to residual stresses and inelastic behaviour of materials are taken into account using a fibre model. The nonlinear semi-rigid behaviour of beam-to-column connections is simulated using a zero-length connection element. The validity of the present analysis is verified by comparing the obtained predictions with existing solutions. A case study of a very large-scale steel frame indicates that the present analysis is very reliable and computationally efficient and thus would be a valuable tool for daily use in office engineering design.

• 出版日期2015-9