JPH04146377A - Vibration control device for building equipped with rooftop heliport - Google Patents

Abstract

PURPOSE:To restrain vibration of a building equipped with a rooftop heliport by a method wherein the heliport is installed on the top of the building through a vibration insulating body so that it can make breadthwise relative movement freely, and the heliport itself is made an additional mass for vibration control. CONSTITUTION:A vibration insulating body 3, made by arranging spring bearings 3a in the form of multilayered rubber made by connecting a plurality of laminated rubbers with flat steel plates and viscous dampers 3b, is provided on the top of a building 1. Then a heliport 2 is installed through the vibration insulating body 5 so that the heliport can make breadthwise relative movement freely. The heliport 2 itself is made an additional, mass for vibration control. Thereby noises emanating from impact on landing and taking-off of a helicopter can be restrained from propagating to the building.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vibration damping device for a building equipped with a rooftop helipad.

[Conventional technology]

In general, in high-rise buildings and superhigh-rise buildings, not only vibrations caused by earthquakes but also vibrations caused by daily wind have a large effect on livability, which is a problem.

One technique for suppressing vibrations in such high-rise buildings and superhigh-rise buildings is to install additional mass on the top of the building via a vibration isolator so that it can move relatively freely in the lateral direction. A vibration damping device in which a pendulum weight is installed and the inertial force of this weight is used as a reaction force to suppress the vibration of a building was developed in Japanese Patent Laid-Open No. 62-27.
This is already known from Japanese Patent No. 3375 and Japanese Patent No. 105879.

Vibration isolators can be roughly divided into two elements: spring bearings using laminated rubber, etc. or sliding bearings using bearings or low-friction materials, etc., and dampers. , one based on an active control method (active mass damper/AMD) in which vibrations of the building are detected by a vibration sensor and an excitation force of a predetermined waveform created based on the detection signal is applied to the additional mass via an actuator; There is also a method that combines the above (active tuned mass damper: ATMD).

As the additional mass (weight) mentioned above, in addition to providing an additional mass dedicated to vibration damping equipment, it has also been proposed to use a heat storage tank for air conditioning, but in the latter case, the heat storage tank for air conditioning is Because it is a facility for functioning, it is difficult to communicate between the facility piping and the vibration damping device, and the structure tends to be complicated.

[Problem to be solved by the invention]

Incidentally, in recent years, helicopters have been attracting attention as a means of high-speed transportation suitable for the information society, and the number of buildings with helipads on the rooftops is increasing. Furthermore, in rooftop helipads, an important issue is how to prevent the noise from the impact caused by the landing and take-off of the helicopter from propagating into the building.

The present invention provides that the rooftop helipad is located at the top of the building, where it is most effective for damping vibrations, and that the helipad requires a large area and is made of thick and sturdy plates to withstand the impact of helicopter take-off and landing. Furthermore, we focused on the fact that the rooftop helipad is not a facility that is closely related to the building, such as an air-conditioning heat storage tank, but is an independent system. The project uses a rooftop helipad to suppress building vibrations caused by earthquakes and wind, as well as suppress the propagation of noise from the impact of helicopter landings and landings into the building, improving the living environment. The purpose is to make it possible.

[Failure to solve the problem]

The technical means taken by the present invention to achieve the above object are as follows. That is, the feature of the present invention is that a helipad is installed at the top of a building through a vibration isolator so that it can move relatively in the lateral direction, and this helipad is used as an additional mass for vibration damping to suppress the vibration of the building. It's because I did it.

[Effect]

According to the above configuration, the rooftop helipad located at the top of the building is used as an additional mass for damping, and the vibrations of the building are suppressed, so that the vibrations are efficiently controlled.

Since the helipad is installed in a building via a vibration isolator, it is possible to use the vibration isolator to block or suppress the propagation of noise caused by the impact of the helicopter landing and landing to the building side.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In the figure, l is a high-rise or super high-rise building equipped with a rooftop helipad 2. Helipad 2 is located at the top of building l.
The vibration damping device is installed so as to be relatively movable in the lateral direction via a vibration isolator 3, and uses the helipad 2 as an additional mass for vibration damping to suppress vibrations of the building 1. 4 indicates a helicopter. 5 is an elevator shaft, 6 is an electrical room, 7 is an outdoor machine space, and 8 is an atrium. The helipad 2 is, for example, made of reinforced concrete and has a mass of about 1 to 5% of the effective mass of the building 1.

As the vibration isolator 3, any one made of known components (the above-mentioned TMD, AMD, ATMD) can be adopted. Specifically, for example, it consists of two elements: a spring support 3a using multi-layered rubber, which is made by connecting multiple sets of laminated rubber with a horizontal steel plate, and a viscous damper 3b, and a vibration sensor (not shown). ) detects the vibration of the building l, and applies an excitation force of a predetermined waveform created based on the detection signal to the heliport 2 as the additional mass via an actuator (not shown) provided in the building 2. will be adopted.

In addition, 9 in FIG. 2 is an opening formed at the end of the helipad 2, and 10 is a ramp that is suspended and supported by the helipad 2 at the position of the opening 9.

〔Effect of the invention〕

Since the present invention has the above-described configuration, it can achieve the following effects.

■Since the rooftop helipad is used as an additional mass for vibration control, there is no need for a dedicated additional mass or installation space, and the helipad is an independent system with little connection to the building, so it can be used for air conditioning. Coupled with the fact that there is no conflict between the equipment piping and the vibration damping device as would be the case when the heat storage tank is used as an additional mass, and the device configuration is simple, vibration damping of the building can be achieved economically.

■Since the helipad is installed in the building via a vibration isolator, it is possible to block or suppress the propagation of noise from the impact of the helicopter landing and landing to the building side, and the building is protected by wind, etc. In combination with suppressing vibrations, it is possible to improve the living environment.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, with FIG. 1 being a schematic sectional view of a building equipped with a rooftop helipad, and FIG. 2 being an enlarged view of the main parts. l...building, 2...helipad, 3...vibration isolator.

Claims (1)

[Claims] A rooftop helipad, characterized in that a helipad is installed on the top of a building so that it can move relatively laterally through a vibration isolator, and the helipad serves as an additional mass for vibration damping to suppress vibrations of the building. A vibration damping device for buildings equipped with