JP-2026075304-A - TMD system for floor vibration control

Abstract

[Problem] To provide a floor vibration damping TMD system that allows for adjustable vertical vibration periods, has a simple configuration, and reduces costs. [Solution] The floor vibration damping TMD system for suppressing vertical floor vibrations comprises a weight provided spaced apart below the floor, a first and second joining member joined to different positions on the weight, a connecting member extending laterally and connected at both ends to the first and second joining members, a first and second diagonal member having one end connected to the first and second joining members and extending diagonally upward spaced apart from the weight, and connected to the floor or a beam supporting the floor to suspend and support the weight, a vibration damping member provided extending vertically between the floor and the weight, and a length adjustment mechanism that allows the length of the connecting member to be adjusted. The first and second diagonal members, the weight, and the vibration damping member form an additional vibration system that vibrates vertically, and the vibration period in the additional vibration system is synchronized with the natural vertical period of the floor. [Selection Diagram] Figure 1

Inventors

• 谷 翼
• 柳坂 祥希
• 田部井 直哉

Assignees

• 大成建設株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (3)

1. A floor vibration damping TMD system that suppresses vertical vibrations of the floor, Below the floor, spaced apart from the floor, A first joining member and a second joining member are joined to different positions on the upper surface of the weight, A connecting member extending laterally and connecting the first and second connecting members, The first and second diagonal members are joined at one end to the first and second joining members respectively, extending diagonally upward so as to be spaced away from the weight, and the other end is joined to the floor or a beam supporting the floor, thereby suspending and supporting the weight. A vibration damping member extending vertically is provided between the floor and the weight, A length adjustment mechanism that allows the length of the connecting member to be adjusted, Equipped with, A floor vibration damping TMD system characterized in that an additional vibration system that vibrates in the vertical direction is formed by the first diagonal member, the second diagonal member, the weight, and the vibration damping member, and the period of vibration in the additional vibration system is synchronized with the natural period of the floor in the vertical direction.
2. The floor vibration damping TMD system according to claim 1, characterized in that the length adjustment mechanism is a turnbuckle provided at an intermediate position of the connecting member, and the period of the additional vibration system can be adjusted by operating the turnbuckle.
3. The floor vibration damping TMD system according to claim 1 or 2, characterized in that each of the first joining member and the second joining member is pin-jointed to each of the connecting member, the first diagonal member and the second diagonal member, and the weight.

Description

This invention relates to a floor vibration damping TMD system for suppressing vertical floor vibrations. High-rise buildings and other architectural structures are sometimes equipped with vibration control devices called TMDs (Tuned Mass Dampers). A TMD consists of a mass tuned to a specific frequency (resonant frequency) and a spring or damper that supports it. This device is effective in suppressing vibrations of structures in response to dynamic external forces such as earthquakes and wind. For example, Patent Document 1 discloses a pendulum-type seismic damping device in which the upper end of a suspension member is attached to a support frame and the lower end of the suspension member is attached to a mass body. Incidentally, the floors of building structures can vibrate due to walking, etc. To suppress such floor vibrations, TMDs like the ones described above may be installed on the floor. For example, Patent Document 2 discloses a mechanism for suppressing vertical vibrations of a main beam, which is assembled to the main beam of an object whose vibrations should be suppressed. In this mechanism, a rotational inertia mass damper that operates due to the vertical vibrations of the main beam is installed in the middle of the main beam in the longitudinal direction, and a diagonal member for transmitting the bending deformation of the main beam to the rotational inertia mass damper is stretched on the side of the main beam in a downward convex bent shape, both ends of the diagonal member are connected to the upper ends of both ends of the main beam and the middle part of the diagonal member is connected to the rotational inertia mass damper, and prestress is introduced by tensioning the diagonal member with an additional spring, and the natural frequency of the additional vibration system, which is composed of the rotational inertia mass damper, the diagonal member and the additional spring, is tuned to the natural frequency of the main beam, which is the main vibration system. In Patent Document 2, the additional spring is a disc spring. Furthermore, Patent Document 3 discloses a mechanism similar to that in Patent Document 2, which is assembled to a beam whose vibration should be suppressed to suppress vertical vibrations of the beam. This mechanism consists of a rotational inertia mass damper installed in the middle of the beam's longitudinal direction and activated by the vertical vibrations of the beam; a diagonal member stretched on the side of the beam in a downward-convex bent shape, with both ends connected to the upper part of the beam at the ends and the middle part connected to the rotational inertia mass damper, thereby transmitting the bending deformation of the beam to the rotational inertia mass damper; and an additional spring for tensioning the diagonal member. The natural frequency of the additional vibration system, composed of the rotational inertia mass damper, diagonal member, and additional spring, is synchronized with the natural frequency of the beam, which is the main vibration system. Furthermore, by setting the connection points of both ends of the diagonal member to the ends of the beam at a position shifted towards the center of the beam from the beam ends, a predetermined separation distance is secured between the connection points and the beam ends. In Patent Document 3, the additional spring is a disc spring. In Patent Documents 2 and 3, the vibration period of the additional vibration system is adjusted by adjusting the stiffness of the additional springs that constitute the additional vibration system. In particular, since disc springs are used as additional springs in Patent Documents 2 and 3, adjusting the stiffness of the additional springs requires replacing the disc springs themselves with those having a different stiffness. Therefore, adjusting the vibration period of the additional vibration system is not easy. Furthermore, in Patent Documents 2 and 3, the mass of the additional vibration system is realized by a rotational inertia mass damper. However, rotational inertia mass dampers have a complex structure and are costly to implement. There is a need for a floor vibration control TMD system that allows for easy adjustment of the vertical vibration period, has a simple configuration, and can reduce costs. Japanese Patent Publication No. 2014-228131Japanese Patent Publication No. 2010-38318Japanese Patent Publication No. 2011-106091 This is a longitudinal cross-sectional view of a floor vibration damping TMD system and a building structure equipped with a floor vibration damping TMD system according to an embodiment of the present invention.This is a cross-sectional view taken along the line I-I in Figure 1.This is an enlarged view of the area indicated by arrow A in Figure 1.This is an example of setting each parameter in the floor vibration control TMD system of the above embodiment.This is a plan view of the wire model used for analysis in the floor vibrati