JP2009013696A - Seismic strengthening method for existing apartment house - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seismic strengthening method for existing apartment houses capable of performing seismic strengthening construction while avoiding noise and vibration as far as possible, i.e., "while living therein", and not causing the reasons of obstructing the visibility of the dwellers of the existing apartment houses or largely changing or inhibiting the living environments but providing the effect of improving the living environments. <P>SOLUTION: In this seismic strengthening method for existing apartment houses arranged parallel to each other, the lower layer parts of the existing apartment houses 1, 1... arranged parallel to each other are connected to each other through horizontal frames 7 for seismic strengthening. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention makes it possible to carry out seismic reinforcement for existing buildings that are inferior in earthquake resistance and habitability, such as so-called housing estates, in which a plurality of existing apartment buildings are lined up in parallel, and the occupancy is also improved. Belongs to the field of seismic strengthening technology.

  The technologies for increasing the seismic strength of existing buildings can be broadly divided into methods of increasing reinforced concrete walls and methods of adding steel braces. When it is desired to open the interior of a building, it is common to perform seismic reinforcement by adding steel braces, and a method of adding steel braces at the so-called windows around the building is implemented. A connected seismic control method that improves seismic resistance by connecting adjacent buildings is also known.

By the way, the problems when rebuilding existing apartment houses or performing earthquake-proof reinforcement work are summarized as whether residents can move (relocate) during the construction period. Especially in an aging area (housing complex), although it is temporary, there is a strong mental and economic refusal and resistance to moving to a place where the living environment is different (relocation), and it is difficult to persuade .
Therefore, there is a particularly great demand for seismic reinforcement that can be “while living” and renovation work that can be “while living” without imposing a burden on the resident (moving).

Conventionally, regardless of whether an existing building is a reinforced concrete structure or a steel reinforced concrete structure, the following (1) to (5) work procedures have been implemented when adding steel braces to perform seismic reinforcement. It has been.
(1) Place anchor bolts on the inner surfaces of columns and beams in existing buildings.
(2) Assemble a framed steel brace consisting of a peripheral frame and braces placed in the plane.
(3) Studs will be provided on the outer peripheral surface of the peripheral frame, and reinforcement will be provided between the columns and beams of the existing building and the peripheral frame of the steel brace with frame.
(4) Formwork that closes the side part of the gap between the existing pillars and beams and the peripheral frame of the framed steel brace is carried out, and mortar is injected into the gap.
(5) Curing the mortar and demolding after developing strength.

As other prior arts, the seismic reinforcement structure of an existing reinforced concrete building disclosed in Patent Document 1 below or the seismic reinforcement method of an RC structure opening disclosed in Patent Document 2 is also similar to the above. As an integrated means of the steel brace, anchor bolts or anchors and studs are attached and mortar is filled.
Also, in Patent Document 3 below, a number of independent structures that are adjacent to each other are bonded to each other by a material having the performance of a spring or a damper on the ground portion, thereby acting on the structure. A so-called coupled seismic control method for reducing the seismic force is disclosed.

Japanese Patent Publication No.62-31143 Japanese Patent Publication No. 7-51803 Japanese Patent Publication No.54-1391

(A) The conventional steel brace expansion method described above generates large noises and vibrations when anchor bolts are installed (for example, drilling or driving hole-in anchors). Implementation of “reinforcement” is difficult.
(B) In addition, the number of occupations increases due to bar arrangement work, formwork work, and mortar injection work. In addition, there is also a problem that it takes a long time for each construction because a period required for each construction and a curing period are necessary.
(C) The so-called coupled vibration control method described in Patent Document 3 will be described as joining between adjacent structures with a material having spring or damper performance on the ground portion. However, as the coupled vibration model described in FIG. 4 of the same publication clearly shows, it is clear that a great effect of vibration control can be obtained only by connecting the upper layers of the structure. Inevitably, there is a serious defect that the connecting member crosses between the upper layers of the existing apartment building, obstructing the resident's view, greatly changing the landscape and living environment, and hindering it.

The purpose of the present invention is to avoid the generation of noise and vibration as much as possible, and to enable so-called “while living” seismic retrofitting work, to block the view of residents of existing apartment buildings and to greatly change the living environment. It is to provide a seismic retrofitting method for existing apartment buildings that does not cause any obstacles, but rather can improve the living environment.
The next object of the present invention is to add a shed on the roof of an existing apartment building by intermediate seismic isolation, and simply move the lower-floor occupants vertically to the newly built shed. A seismic retrofitting method for existing apartment buildings that can be implemented without changes in the living and living environment of the elderly and changes in the existing community, and causes little mental or economic refusal or resistance to moving. Is to provide.
The present invention further aims to provide a seismic retrofitting method for an existing apartment building, which is expanded on each floor of the existing apartment building and widens and expands each floor to realize a significant improvement effect on the living environment. Yes.

As means for solving the above-mentioned problem, the seismic reinforcement method for an existing apartment building according to the invention described in claim 1 is:
A seismic reinforcement method for existing apartment buildings with multiple buildings in parallel,
The lower layers of the existing apartment buildings 1, 1... Lined up in parallel are connected by a horizontal frame 7 for earthquake resistance reinforcement.

The invention described in claim 2 is the seismic reinforcement method for an existing apartment building described in claim 1,
Reinforce the pillar 2 of the existing apartment building 1 and also reinforce the roof-top beams, then install the seismic isolation device 5 on the roof part of the building 1 and place the roof 6 on the seismic isolation device 5 It is characterized by extension.

The invention described in claim 3 is the seismic reinforcement method for an existing apartment building described in claim 1,
Pillars 20 are newly installed outside the existing apartment building 1, and each floor of the existing building 1 is connected to the new pillar 20 to perform extension 21 of each floor of the existing building, and on the roof of the new pillar 20 and the building 1. The receiving pillar 4 is constructed, the seismic isolation device 5 is installed on the upper k pillar 4, and the roof 6 is extended on the seismic isolation device 5.

According to the first aspect of the present invention, the seismic reinforcement element is connected to the lower floors of the existing apartment buildings 1, 1. Seismic reinforcement can be implemented without obstructing the sight of the residents of the city and creating a cause that greatly hinders the landscape and the living environment. And in the lower layer part of the existing apartment house 1 below from the seismic reinforcement structure (artificial ground 10) connected by the horizontal frame 7, there is a shopping street, a parking lot, a stockpiling warehouse 11 prepared in case of a disaster, rainwater storage It can be diverted and utilized by installing the tank 13 or the like.
According to the invention according to claim 2, the seismic isolation device 5 is installed on the roof portion of the existing apartment house buildings 1, 1... Lined up in parallel, and the roof 6 is extended on the seismic isolation device 5. Thereafter, if necessary, it is possible to vertically move (relocate) the occupants of the lower floors to the shed 6 which has been expanded. Therefore, there is no change in the place of living or living environment or changes in the existing community, so earthquake-proof reinforcement of existing apartment buildings that does not provoke the spiritual and economic refusal and resistance of residents to move. Construction method can be implemented.
Moreover, the roof 6 that is added to the roof floor is structurally disconnected from the existing building below the position of the seismic isolation device 5, so that it is naturally possible to freely design dwelling units such as column spans and floor heights. . Therefore, added value can be increased, and a new living space with excellent habitability can be provided. Moreover, it is possible to add the construction cost of the seismic reinforcement work to the surplus units more than the residents by recruiting new residents.

  In the case of the invention according to claim 3, the seismic isolation device 5 is installed on the roof portion of the existing apartment building 1, and the roof 6 can be expanded and used on the seismic isolation device 5. Since the extension of the dwelling unit 21 is also performed, in addition to the effect similar to the invention according to claim 2 above, the extension 21 that widens and expands each floor dwelling unit of the existing building 1 provides the dwelling unit with excellent dwelling property. A living space can be provided, and an improvement effect of the living environment can be realized.

It is a seismic strengthening method for existing apartment buildings lined up in parallel with each other, and the lower layer portions of existing apartment buildings 1, 1,.
Alternatively, the pillar 2 of the existing apartment building 1 is reinforced, the roof beams are reinforced, the seismic isolation device 5 is installed on the roof portion of the building 1, and the roof 6 is placed on the seismic isolation device 5. To add.
Furthermore, a pillar 20 is newly installed outside the existing apartment building 1, and each floor of the existing building 1 is connected to the new pillar 20 to extend 21 each floor of the existing building. And the receiving pillar 4 is constructed | assembled in the roof part of the said new pillar 20 and the said building, the seismic isolation apparatus 5 is installed on the receiving pillar 4, and the roof 6 is extended on the said seismic isolation apparatus 5. FIG.

Below, the Example of the earthquake-proof reinforcement construction method of the existing apartment house building which concerns on this invention is described.
First, in FIG. 1 to FIG. 9, the construction years are old and aging, but the maintenance is not perfect, and the low-rise existing apartment buildings 1, 1,... Example 1 of the seismic strengthening method for improving the comfortability at the same time as the seismic strengthening of the existing apartment building 1 in the housing estate is shown. In this first embodiment, the lower layer portion between adjacent buildings 1 and 1 is connected by a horizontal frame 7 to perform seismic reinforcement, and an intermediate seismic isolation device 5 is installed on the roof portion of the building 1. It is characterized by improving the comfortability by adding a shed 6 on top of 5.

First, FIG. 1 has shown the structure of the building 1 as a framework figure about one building of an existing apartment house building. However, it does not mean that the existing apartment house building 1 is reinforced concrete, and is merely an example of a skeleton of the construction target building 1.
In FIG. 2, for each column 2 of the building 1, the lower layer portion of the column is intensively or the column of the same column so as to ensure seismic safety against the vertical load increase of the roof 6 that will be added to the roof floor. Work such as axial force reinforcement and shear force reinforcement such as increasing the axial force cross section by attaching a steel frame member over the entire length. In addition, the roof beam 3 is also reinforced. And the state which constructed | assembled the receiving pillar 4 for installing an intermediate seismic isolation device on a rooftop pillar is shown in FIG. Since the reinforcement work for each pillar 2, the reinforcement work for the rooftop beam 3, and the construction of the receiving pillar 4 can be performed with relatively low noise and vibration, respectively, Work can be carried out without any complaints.

Next, FIG. 3 shows a stage in which the seismic isolation device 5 for intermediate seismic isolation is installed on each receiving column 4 constructed as described above.
And FIG. 4 shows the stage which extended the roof 6 on the said seismic isolation apparatus 5 of the roof part of the said existing apartment building 1 concerned. Incidentally, the shed 6 expanded as described above naturally has a structural edge that is cut off from the existing building below, so as illustrated in FIG. The dwelling unit design can be freely designed regardless of the structure of the existing apartment building 1. Therefore, the shed 6 can provide a resident's use by constructing a living space with high added value and excellent habitability. In addition, as will be described later, surplus dwelling units more than the number of units required for residents who move from the lower part of the existing apartment building 1 may be transferred or rented to new purchasers. The resulting money can be added to the construction cost of the seismic reinforcement work.

Next, FIG. 5 and FIG. 6 show that after the extension of the roof 6 is completed on the roof of the existing apartment building 1, the occupants of the lower floors including the first floor are moved as vertical movements. After implementing the above, between the adjacent lower layer parts of the existing apartment buildings 1 and 1 lined up in parallel, specifically, the ceiling slab and beam part of the first floor part that is highly damaged by the earthquake The figure shows a stage in which the buildings are connected by a horizontal frame 7 and the structure of the lower layer portion of the building is substantially widened to perform seismic reinforcement to support each other. By absorbing the seismic energy by the horizontal frame 7 and demonstrating the effect of supporting each other, it is possible to reduce damage damage particularly in the lower layer part of the existing apartment building 1 that is old and has deteriorated. is there.
Therefore, with respect to the structure of the horizontal frame 7, it is preferable to construct a foundation 8 at an intermediate portion between buildings and install a vibration control device or a vibration resistant device such as a buckling stiffening brace 9.

As described above, the seismic control structure portion in which a plurality of existing apartment buildings 1, 1... Adjacent to each other are adjacent to each other, that is, between the ceiling slab and the beam portion of the first floor portion by the horizontal frame 7. As a utilization method, in the first embodiment, as shown in the conceptual diagram of FIG. 7, the upper surface portion of the artificial ground 10 that has been modified to the artificial ground 10 and is equipped with a vibration control or seismic element is made of green trees and lawns. A lot of spacious, open and natural new community spaces are formed between the residences.
On the other hand, in the lower part of the artificial ground 10, as shown in FIG. 9 as an example, a disaster prevention storage warehouse 11, a sewage storage tank 12, a rainwater storage tank 13 and the like are temporarily installed as a preparation for an earthquake disaster or the like. Use as a water source for preparing toilets or watering trees and lawns on the top. If there is more room, a parking lot can be prepared.
In addition, for the 1st floor part of the existing apartment building 1 that has lost sunshine due to the horizontal frame 7 and the artificial ground 10 and its habitability has deteriorated, the dwelling space can be replaced with various shops, barber / beauty salons, sports gyms, etc. It can be used as a so-called shopping street and utility space.
In addition, when the earthquake resistance of the middle layer of the existing apartment building 1 is insufficient, a skeleton elevator tower with no feeling of pressure is added between the residential buildings for reinforcement, and the elevator tower is a lining of equipment piping. Can also be used to update equipment piping

Assuming the contents (technical matters) described in the first embodiment shown in FIG. 1 to FIG. 9 above, the seismic reinforcement method of the present invention is classified in terms of technical thought and its variations are shown. These are the following FIGS.
Based on the implementation model shown in FIGS. 10-12, the variation of this invention is demonstrated notionally, but about the concrete means and structure, the matter and content which were demonstrated in the said Example 1 should be used. I want you to understand.

First, FIG. 10 shows a horizontal frame 7 between adjacent residential buildings such as the lower part of the existing apartment buildings 1, 1... An example in the case of implementing the earthquake-proof reinforcement method which connects and mutually supports the mutual relationship between buildings by expanding substantially the structure of the lower layer part of buildings 1 and 1 is shown notionally. Of course, the embodiment which equips the horizontal frame 7 with a vibration control device is included.
This corresponds to an embodiment of the invention described in claim 1.

As described in the first embodiment, FIG. 11 shows the structure of the existing apartment building 1 in which a plurality of buildings are arranged in parallel. As described in the first embodiment, the steel member is removed from the pillar 2 of the existing building 1. Axial force reinforcement such as increasing the axial force cross-section, shear reinforcement, compensating for the load resistance against the vertical load increase of the roof 6 that will be added to the roof floor later, further reinforcing the roof floor beam, The receiving pillar 4 is constructed on the roof floor portion of the pillar 2, and the roof 6 is extended on the seismic isolation device 5. Subsequently, or after the residents in the lower layer move to the shed 6, the adjacent buildings in the lower layer such as the first floor of the same building 1 are connected to each other by the horizontal frame 7, and the buildings 1, 1 The example at the time of implementing the earthquake-proof reinforcement construction method made into the mutually supporting relationship between buildings by substantially widening the structure of the lower layer part of is shown.
This corresponds to the embodiment of the invention described in claim 2.

Next, in FIG. 12, the building years are still old and aging, but the maintenance is not perfect, and there are multiple low-rise existing apartment buildings 1 and 1 that are inferior in earthquake resistance and habitability. For each of the existing apartment buildings 1 in the so-called housing estate, an outer column 20 is preferably newly established outside the south side (or the north side is acceptable) of the existing apartment building 1 and the columns 2 of the existing building 1 are reinforced. After the above, the slabs and / or beams on each floor are connected to the new pillar 20 and an extension 21 is preferably performed on the south surface side of each floor of the existing building. Therefore, widening or expansion of each floor dwelling unit of the existing building can be performed by the amount of the extension portion 21 and the comfortability can be improved. In addition, the roof of the existing apartment building 1 is reinforced with the roof beams described above, and the receiving pillars 4 are constructed on the roof pillars 2 and 20. The example of the seismic reinforcement method which installed the seismic isolation apparatus 5 and extended the shed 6 on the said seismic isolation apparatus 5 is shown notionally.
In the case of the present embodiment, after the extension of the roof 6, the adjacent buildings in the lower layer such as the first floor of the buildings 1 and 1 are connected to each other by the horizontal frame 7, and the lower layer of the buildings 1 and 1. A seismic reinforcement method is also implemented to make the structure of the parts substantially widen so that they can support each other.
This corresponds to an embodiment of the invention described in claim 3.

  Although the present invention has been described above based on each embodiment, the present invention is not limited to the scope of the embodiment. It should be noted here that the present invention also includes embodiments performed within the scope of design changes and modifications made by those skilled in the art as needed.

It is the perspective view which illustrated the framework of the existing building where the earthquake-proof reinforcement method of the present invention is carried out. It is a perspective view which shows the step which built the receiving pillar on the roof floor of the said existing building. It is a perspective view which shows the step which installed the seismic isolation apparatus on the receiving pillar. It is a perspective view which shows the stage which expanded the roof on the rooftop floor. It is the perspective view which showed the step which connected the lower layer part of the existing building lined up in parallel with the horizontal frame. It is a perspective view which shows the stage which the construction of FIG. 5 further advanced. It is a perspective view which shows an example in which the implementation construction of the earthquake-proof reinforcement method of this invention was completed. It is sectional drawing which shows the structural example of the roof extended to the rooftop floor. It is a perspective view which shows the structure under the artificial ground using a horizontal frame. It is an elevation view which conceptualizes and shows the Example from which the seismic reinforcement construction method of this invention differs. It is an elevation view which conceptualizes and shows the Example from which the seismic reinforcement construction method of this invention differs. It is an elevation view which conceptualizes and shows the Example from which the seismic reinforcement construction method of this invention differs.

Explanation of symbols

1 Existing apartment building 7 Horizontal frame 2 Pillar 5 Seismic isolation device 6 Roof 20 External pillar 21 Extension of each floor of building 4 Receiving pillar

Claims (3)

A seismic reinforcement method for existing apartment buildings with multiple buildings in parallel,
A seismic reinforcement method for existing apartment buildings, in which the lower layers of existing apartment buildings lined up in parallel are connected by a horizontal frame to provide seismic reinforcement.   Reinforce the pillars of the existing apartment building, reinforce the rooftop beams, then install a seismic isolation device on the rooftop part of the building, and add a roof on the seismic isolation device A seismic reinforcement method for an existing apartment building according to claim 1.   A new pillar will be installed outside the existing apartment building, and each floor of the existing building will be connected to the new pillar to extend each floor of the existing building, and a receiving pillar will be constructed on the new pillar and the rooftop part of the building, The seismic reinforcement method for an existing apartment building according to claim 1, wherein a seismic isolation device is installed on the receiving pillar, and a shed is added on the seismic isolation device.

Images