JPH0477111B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a structure having vibration damping properties.

(Prior art) In conventional vibration damping devices for structures, damping members are provided at appropriate locations on a single frame, and when the frame vibrates due to external force, vibrations occur due to interlayer displacement of the frame. The structure is configured so that strain energy is absorbed by the vibration damping member and the vibration damping effect of the structure is exhibited.

(Problem to be Solved by the Invention) However, since the above-mentioned frame itself is required to have a rigidity above a certain limit, displacement between the layers is naturally limited, and when the frame vibrates due to external force, a sufficiently large damping effect can be achieved. I couldn't do it.

The present invention was proposed in view of the problems of the prior art, and its purpose is to propose a structure that exhibits a large damping effect when the structure vibrates under external force. It is in the point of doing.

(Means for Solving the Problems) In order to achieve the above object, a structure according to the present invention includes an outer frame, an inner frame disposed inside the outer frame, and having a different rigidity from the outer frame. In the double structure structure, a damper is provided at a joint between a horizontal member made of a cantilever beam or a cantilever slab protruding from the outer frame toward the inner frame, and the horizontal member in the inner frame. When the structure vibrates in response to an external force, the vibration energy is absorbed by the damper through relative deformation of both the inner and outer frames.

(Function) According to the present invention, when a double structure structure consisting of an outer frame with low rigidity and an inner frame with high rigidity made of multiple layers disposed inside the structure vibrates due to external force, , the outer frame deforms more greatly than the inner frame, causing a large relative deformation in both the inner and outer frames, and a horizontal member consisting of a cantilever beam or a cantilever slab protruding from the outer frame toward the inner frame; A damper installed at the joint with the floor beam in the frame absorbs vibration energy and dampens the vibration of the structure.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes an outer frame with low rigidity, inside which a multi-layer inner frame 2 with higher rigidity is arranged, and both the inner and outer frames 1 and 2 constitute a double structure, and each of the inner frames 2 A large space 3 is provided between the layers.

According to the illustrated embodiment, the inner frame 2 has three layers and one
Each unit is composed of the same member cross section.

Furthermore, a damper 6 is interposed at a joint a between a cantilever horizontal member such as a cantilever beam or a cantilever slab 4 projecting inward from the outer frame 1 and the outer end of the floor beam 5 of the inner frame 2. equipped.

7 indicated by a broken line in the figure is a beam member of the outer frame 1.

Since the illustrated embodiment is configured as described above, when the double structure structure consisting of both the inner and outer frames 1 and 2 is subjected to external forces such as wind or earthquakes and causes vibration, the Frame 1 is the second
While the state shown by the solid line is more greatly deformed than the state shown by the broken line in the figure, the highly rigid inner frame 2 is deformed less than the outer frame 1 as shown by the solid line, and as a result, there is a gap between the inner and outer frames 1 and 2. A large relative deformation occurs, and with this deformation, the damper 6 interposed at the joint between the cantilever beam of the outer frame 1 or the cantilever slab 4 and the outer end of the floor beam 5 of the inner frame 2 Thus, vibrations are absorbed and the vibrations of the double-structured structure are damped.

(Effects of the Invention) According to the present invention, as described above, a structure is configured to have a double structure consisting of an outer frame and a plurality of layers of inner frames disposed inside the outer frame, and the inner frame is lower than the outer frame. A damper was installed at the joint between the horizontal member made of a cantilever beam or cantilever slab protruding from the side and the floor beam in the inner frame, so the structure would not vibrate due to external forces from earthquakes or wind. In this case, according to the present invention, as described above, the structure has a double structure consisting of an outer frame and an inner frame disposed inside the outer frame and having a different rigidity from the outer frame. The outer frame deforms differently from the inner frame having different rigidity in response to an external force such as that, and a relative deformation occurs between the inner and outer frames. Vibration energy is absorbed by a damper interposed at a joint between a horizontal member made of a supporting slab and the horizontal member in the inner frame, and as a result, vibrations of the structure are damped.

At this time, since the structure has a double structure, a large relative deformation occurs between the inner and outer frames, and the damper absorbs vibration energy due to this relative deformation. This provides a great vibration damping effect that cannot be obtained with other vibration damping devices.

Further, according to the present invention, since each layer of the inner frame is independent from each other, it is possible to easily remodel each layer.

Further, by making the inner frame have the same member cross section for each unit, member management becomes easier.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of a structure according to the present invention, and FIG. 2 is an explanatory diagram of its operation. 1... External frame, 2... Inner frame, 4... Cantilever beam or cantilever slab, 5... Floor beam, 6... Damper.

Claims (1)

[Claims] 1. In a double structure structure consisting of an outer frame and an inner frame disposed inside the outer frame and having a different rigidity from the outer frame, a piece protruding from the outer frame toward the inner frame. A damper is interposed at the joint between a horizontal member made of a supporting beam or a cantilevered slab and the horizontal member of the inner frame, and when the structure vibrates under external force, the relative deformation of both the inner and outer frames is suppressed. A structure having vibration damping properties, characterized in that the structure is configured such that vibration energy is absorbed by the damper.