Paving block pavements are an ecological, economical, and space forming valuable type of road surface, and therefore, the demand is continuously increasing. Nevertheless, immature design concepts often lead to unexpected performance, which reduces confidence in these types of constructions. Especially the mechanical performance of the vertical joints between paving blocks as well as the interaction behavior to the underlying base courses is often not depicted realistically enough. This motivated the development of the numerical simulation tools for paving block structures presented within this thesis, which are able to take into account the complex non-linear behavior between structural elements of this type of pavement constructions more reliable. Numerous identification experiments were carried out to determine material and interaction properties of paving block superstructures. Therefrom, material models and parameters were obtained and implemented into numerical models.^ ^The resulting simulation tools have been partially validated by means of accelerated pavements tests and full scale experiments. The first part of this thesis (Publications A to C) is devoted to paving block structures with sand-filled vertical joints. Three different identification experiments to derive material models for the interaction behavior between paving blocks are proposed. The developed structural simulation tool was validated by means of accelerated pavement tests, on two full scale test sections. Furthermore, the influence of superelevated cross-profiles of paving block structures on their load bearing capacity was investigated by means of comprehensive parameter studies. Thereby, two main structural failure mechanisms could be identified, and based on the numerical results a recommendation for an optimum size of superelevation could be given.^ The structural response due to horizontal loadings, a very often neglected but for the performance of paving block structures essential load condition, was investigated using a further numerical model. Realistic frictional behavior between different types of paving blocks could be assessed from identification experiments and implemented into numerical simulations. The resulting 3D deformation fields of several laying patterns and types of paving block superstructures revealed improved insights into horizontal load transfer mechanisms. A fully automated numerical model generation allowed for a comprehensive performance evaluation with respect to the horizontal shifting resistance of different superstructure. The second part of this thesis (Publications D and E) focuses on the mechanical behavior of paving block pavements with mortar-filled vertical joints, mainly addressing the prediction of cracking mechanisms under thermal loading.^ By means of the proposed simulation tool, basic structural failure mechanisms, due to different temperature events, could be identified and relationships between crack widths and different bonding strengths as well as installation temperatures were obtained. Moreover, estimates for necessary bonding strengths between paving blocks and mortar bed to prevent large (visible) cracks due to temperature loads could be given. Finally, it can be concluded that by taking the interaction behavior between structural elements of such type of pavements appropriately into account, a more reliable description of complex structural response mechanisms becomes possible. Thus, sophisticated numerical simulation tools are able to deliver new insights into the mechanical behavior of paving block pavements and have the potential to significantly enhance performance predictions, especially in combination with appropriate identification and validation experiments.