End Colloquium Carmen Korevaar

The aim of my research is to investigate the seismic response of tall timber dowelled truss structures. This capacity is often expressed in terms of behavior factor (q-factor), which is applied in the common static elastic calculation method, as prescribed by Eurocode 8. To introduce a practical framework for the analyses, this research concerns the tall timber structure Mjostarnet as case study structure. This truss structure also represents the growing interest in the building industry for more sustainable as well as the increase in highrise structures. Thereby, also the need for engineering research for these types of structures arises.
The focus is on the behavior of dowel-type connections, which can govern as dissipative zones in timber truss structures in the case of seismic loads. To determine and analyze this characteristic hysteretic behavior, quasi-static reversed cyclic experiments are performed with axial loads on test specimen including these connections. 
Furthermore, a two-dimensional numerical model representing the case study structure is constructed in Abaqus to perform incremental dynamic analyses, consisting of multiple nonlinear time-history analyses. As input for these analyses, eleven ground motion records were selected based on the elastic response spectrum for the location of Gemona, Italy. By increasing their intensity in terms of PGA value, the behavior factor equals the ratio of the near-collapse situation over the elastic limit for each input record. This model accounts for energy dissipation by including the full-scale expected connection behavior resulting from the experimental research, which is translated to a numerical spring relation.

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