The novel composite material, prestressed fiber-reinforced polymer concrete, is distinguished by its low weight and exceptional vibration-damping properties, making it highly suitable for use in heavily loaded structural components in machine tools. Additionally, the material exhibits high thermal stability. Preliminary bending tests on simple prismatic test samples have demonstrated that preheating prior to testing increases the bending stiffness. However, the influence of heating on the static stiffness of a complex machine component with varying fiber orientations remains unexplored. This study aims to investigate this influence through experimental analysis. Focusing the further application of polymer concrete and the associated need for feasible design and calculation methods additionally a method for numerical investigation is developed. The simulation models the interactions between the bonding behavior of carbon fiber rovings with polymer concrete, the residual stresses induced by prestressing during curing, and the effects of ambient temperature. The accuracy of the simulation results is validated through comparison with experimental investigation.