ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
The problem of excessive structural floor vibrations due to human activities is critical because it results in excessive interference response at specified frequencies. Excessive vibrations can occur in slab systems with low stiffness or a low damping ratio. Increasing the stiffness of the slab is one method which can be used to reduce excessive floor vibration. In some cases this is, however, not possible because the additional mass of the stiffening structure will indirectly increase the overall mass of the structure; therefore, it will increase the stress of the structural elements. Other methods are using passive, active and semi-active dampers. This study used a passive damper system named tuned mass damper (TMD) with an additional “X-shaped metal” absorber as an additional damper which was applied to the concrete slab having a dimension of 4 m in length, 0.90 m in width and 0.08 m in thickness. This research showed that the mass ratio of the TMD to slab (μ) of 2.00% with a spring stiffness (k) of 80.281kN/m could increase the damping ratio of the slab from 1.82% to 2.06%. The TMD with the additional “X-shaped metal” absorber resulted in the damping ratio of 3.40%.