Validation of Rocking Displacement for Segmented Cross Laminated Timber Shear Walls in Multi-Story Buildings Under Lateral Loads
Master thesis
Permanent lenke
https://hdl.handle.net/11250/3083430Utgivelsesdato
2023Metadata
Vis full innførselSamlinger
- Master's theses (RealTek) [1723]
Sammendrag
In this thesis parametric analyses from numerical and analytical methods for one-story CLT shearwalls are compared and validated for the upcoming Eurocode 5. The analytical methods are thealready proposed method in Annex R and a new proposal from Arup. In addition, numerical andanalytical analyses for multistory behavior are compared to see their preciseness for multistorybehavior. The thesis only looks at kinematic rocking as a contribution to lateral deflection.The parametric analysis for one-story utilizes Open Application Programming Interface withPython to manipulate the model made in the Finite Element Method program SAP2000 to dodifferent series of analyses. The method allows for the extraction of the result made in the numerical analysis and compares the results from the analytical analyses. The method changes thedifferent parameters such as stiffness of hold-downs, vertical joint stiffness, and the number ofpanels in segmented walls.For multistory calculations Python is used for the analytical methods and hand modeling is doneto make the SAP2000 models. Only certain cases are looked at in this scenario and therefore thecomparison is done by hand.The results showed very good agreement between the two analytical models from Annex R andArup and the numerical analyses in SAP2000 when looking at single-story behavior. For multistory behavior, Annex R generally had a larger displacement, and Arup generally had a lowerdisplacement when Kv > Kh. One difference between these methods is their way of calculatingthe rotation of the walls and that may be the reason for the discrepancy between those methods.In addition, Arup uses the moment at the top of the wall and lateral shear force as its input, whileAnnex R only uses the moment at the bottom of the wall. This may also be a contributor tothe difference in multistory deflection. More studies are needed to further validate the analyticalmethods for multistory calculations.