Structural dynamics and earthquake engineering paper
Salib, S 2014, 'Dynamic behaviour of hybrid steel-concrete structures beyond conventional stability limits during severe seismic', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 949-954. ISBN: 9780994152008.
Considering Soil Structure Interaction (SSI) for structures located in high seismic zones directs many structural engineers towards developing rigorous three Dimensional Finite Element Modelling (3DFEM). This modelling usually represents SSI as well as many details of both superstructure and foundations. In addition, structures composed of hybrid skeleton systems and different materials add more complexity to the desired FEM. Realistically, a lot of time, effort and budget are spent on such detailed FEM; not only to develop but also to process. Yet, the accuracy of the obtained results is considerably influenced by the SSI modelling itself. Therefore, the present study introduces a FEM approach for a sophisticated nonlinear SSI. The proposed FEM is capable of predicting the plastic soil deformations, tracking the structure position during seismic excitation and capturing the structure behaviour after experiencing instability conditions. Superstructures with steel columns and concrete walls of various configurations are investigated. Further, the proposed modelling philosophy allows transforming the entire capabilities of the 3D-FEM of the structure into a significantly simplified 2DFEM. The study emphasises that structures can be designed to behave beyond conventional stability limits in a manner that restores stability and optimises both design and construction costs.