Effect of Non-Structural Components on Over-Track Building Vibrations Induced by Train Operations on Concrete Floor

Train-induced vibration inevitably affects the living standards and work productivity of residents and staff within transit-oriented development (TOD) buildings, especially when trains operate on the concrete floor. Traditional structural calculation models ignore the influence of non-structural components and incorrectly simulate the dynamic characteristics of floor slabs. The influence of non-structural components has been extensively studied, but their impact on train-induced vibrations within the building has not been considered. This study established a numerical model to reveal the effect of partition walls and floor pavement on train-induced vibrations. The result indicated that non-structural components have a significant impact on the distribution of the modal characteristic of the floor slab. The acceleration levels of floor slabs below 50Hz are significantly affected by non-structural components. Besides, non-structural components provide a new pathway for more efficient vibration dissipation below 20Hz within the slab. However, there is a potential for vibration amplification to occur at 25–40Hz due to slab resonance. The findings offer a practical guideline and threshold for TOD building design, thereby contributing to the enhancement of occupant comfort.