JPH1122004A - Construction of a simple calculation system using steel braces for the proper placement of load-bearing walls in a wooden frame conventional construction building - Google Patents

Abstract

(57) [Summary] [PROBLEMS] The present invention relates to a seismic performance of a wooden framed conventional building using only a conventional construction method that relies on a wooden shaft bracing as a basis of its strength. Based on the re-recognition of various points that cannot be adequately handled, the high strength of the products based on the thorough quality control of steel bracing and the simplicity of construction, as well as the proper placement of the products in the entire building Comprehensively establish a simple calculation system that can check easily, and, together with the dignity of life, make a new tradition of the construction method as "tree culture". SOLUTION: The concrete means for solving the problems of the present invention is based on the practice covering the above-mentioned various items, and includes the thoroughness of product accuracy and quality control in a frame manufacturing process, and on-site construction management. Because the engineers in charge, including carpenters, have the simplicity and strength of the construction method, they do not fall into rough ways to fasten the wooden shaft braces on other walls.
It is important to thoroughly understand the manual of the process procedure and to thoroughly disseminate the philosophy of the invention that matches the weight of the Minister of Construction's recognition, and both the inventor and the applicant are aware of the high social significance of the invention. I think that is fundamental.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a construction work for a timber-building construction company, which conducts an initial check at the design stage and a subsequent correction study based on numerical values for improving the performance of seismic performance of a conventional wooden framed building. Even in a store, it can be achieved by a simple calculation method that is generally simple enough to calculate the amount of wall, and the weak point of bias of the load-bearing wall that can occur as a result of free layout, which is a feature of the same construction method, is considered as a high strength OK.
An object of the present invention is to create a means for efficiently realizing a well-balanced distribution of proof strength by incorporating a frame.

[0002]

2. Description of the Related Art Conventionally, the calculation of the amount of framing wall necessary for the proof strength of a wooden building prescribed in Article 46 of the Enforcement Order of the Building Standards Law is performed in such a manner that both the girder direction and the beam-to-beam direction are arranged in that direction. Pass / fail judgments have been made based on the total value of the amount of load-bearing walls.In the case of public housing loans or ordinary wooden houses other than those of a certain size or of a specific structure that are subject to structural calculation review, the It was left to the empirical considerations on the construction confirmation application drawing by the carpenter's ridge beam, and even if it is seen as a customary plan, in order to arrange the rim side and living room on the south side and take a large opening window, Inevitably, only a small bearing wall can be obtained, and although it is apparently considered to be seismically biased, the wall density around the ancillary rooms such as the push-in on the north side and toilets and toilets is high, so the total wall amount It has been considered good to meet the prescribed numerical values, so efforts in the technical aspect that exceed the conventional level in line with the conventional Hanshin Great Earthquake even though the conventional construction method as a whole sounded a warning bell A general-purpose and persuasive construction method with a philosophy that is too compensating has not yet emerged.

[0003]

In the conventional wooden frame construction method, it must be said that the structural strength of the frame is borne entirely by the braces. The result of the fastening means at both ends of the paddle determines the seismic performance, but there is also a fate as an irreversible wooden shaft, splitting against the tensile force at the tip fastening part as a life Regulations that support such delicate construction management require strong leadership in both dynamics and rational arrangement of load-bearing walls. Therefore, it would be easy to advocate the construction after seeing the results of the catastrophic destruction caused by the earthquake, but the concrete proposal of a construction method that can prevent damage from the design stage is the only thing. It must be considered as the responsibility of the building engineer, and the OK frame approved by the inventor and the applicant can be installed by a simple method and process. It is possible to obtain the expected answer within the range of simple addition, subtraction, multiplication, and division calculations without the need for a technician, that is, to use a high-strength seismic frame with a form and its appropriate placement theory together The technical effect that can be exerted is the main problem of the present invention.

[0004]

Means for Solving the Problems As means for solving the above-mentioned problems, there are divided into two points: an implementation process from the production of a shapely OK frame to installation on a site, and a calculation formula for theoretically arranging an appropriate arrangement of the frame. You can see. First, regarding a frame having one form, a utility model registration dated March 21, 1996, No. 3 under the same name as the present inventor and the applicant.
No. 024994 already describes in detail in the official gazette record from its shape to the embodiment. (Some of the drawings described below have similarities to the drawings of the same registered application, but bear the most burden on the bearing capacity. It is a decisive feature of the present invention that an iron plate reinforcing plate with a thickness of 10 mm is factory-welded at the bolt position of the lower frame to make it a standard product.) Further, on March 2, 1997
On the 1st, "Ministry of Construction Tamazushi No. 12" was approved by the Minister of Construction as having inherent strength and the upper limit of wall magnification "5.0" stipulated in the Ordinance for Enforcement of the Building Standards Law was obtained. Also, when submitting an application for building confirmation, approval for the application of the OK frame was obtained.

Next, the configuration of a second simple calculation system will be described. The strength of the earthquake-resistant wall in the conventional wooden frame construction method is entirely left to the construction accuracy of braced installation, but proper wall arrangement within one building is also an important point. The mission depends on how effective a theory of computation can be established in the somewhat blind ambiguity of regulation. Moreover, only the structural analysis engineer can master the theory of computation, and if most of the building construction companies that use the versatility of the construction method as daily work are avoided as a difficult problem, the traditional construction method as a wooden culture is close There is only a road of decline in the future, and I am proud that the simple calculation system according to the present invention is revolutionary.

That is, the difference between the center of gravity representing the center of the load of the entire building and the center of rigidity as a joint development for each section surrounded by the load-bearing wall = The greater the eccentricity, the greater the risk of torsion and collapse during an earthquake. The eccentricity is inevitably inevitable because we want to provide a stepped shape with a change in appearance and a large opening as an attractiveness of the conventional construction method, but in this case, the arrangement of the load-bearing wall is the thinnest When only a small width such as 3 shaku can be installed, insert a high-strength OK frame in the narrow wall in place of a wooden shaft brace to achieve an effect that greatly exceeds the wall as a minister-approved wall magnification of "5.0" The method of assembling the numerical results, which is the basis, is based on the plan of the floor plan before adoption of the frame. The numerical value divided by the value is calculated for each axis and compared. In other words, it is possible to compare how much wall force is distributed per meter of axis, and the weakest axis is already in the plan view. It should be obvious, so replace it with the high magnification of the frame and divide the amount of wall that has been raised again by the axis length and compare. If one is not enough, try setting the frame insertion at two places and read the value for each axis In order to reduce the difference, in other words, repeat the trial calculation to reduce the eccentricity, and if the difference can be adjusted to within about 0.3 as a final result, even in the computer analysis, the eccentricity "0" in both the digit direction and the beam-to-beam direction can be obtained. The inventor has verified and confirmed that the determination result can be obtained, and will be described in the following description of the model plan and calculation formula.

When the building is a two-story building, it is clear that the wall arrangement on the first floor, which has been adjusted for the conditions described above, and the vertically continuous wall arrangement is preferable for structural seismic resistance. Should be planned as 4 to 5 and a floor plan with two floors spread widely.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION First, a basic concept which is a prerequisite for an embodiment of the present invention will be described. Regarding the traditional construction method of wooden frame cultivated for a long time by the history and climate of Japan and the gem of the predecessors, when trying to cope with a huge earthquake far exceeding the set value on the desk, the root of its structural strength The splitting phenomena that occur during the resistance to shaking at the part of the bracing itself as the natural wood shaft should be identified as a plant limit, and therefore a reliable physical seismic material and a generally simple construction method OK as steel
I am convinced that frames are the simplest starting point.

With this concept, at the Japan Housing and Wood Technology Center, a public testing organization,
One on May 28, one on May 14 of the same year, and nine on the same year
On March 25, a continuous body test was conducted in accordance with the JIS regulations premised on the approval of the Minister of Construction, and a record of 7.3 times the average wall magnification was achieved as a proof stress, and the results are the only authority in Japan. The assessment of the Building Center of Japan was completed on January 20, 1997, and based on the assessment results, the strength of the frame alone was set as the maximum wall magnification of the Building Standards Law "5.0" on March 21, 1997. In addition, after evaluating the marginal strength, the ministry was approved as a construction method that can be used in three-story buildings where the walls are continuous up and down from the first floor to the second to third floors.

[0010] It should be noted that the above-mentioned evaluation of the center was evaluated by Professor Yukihiro Kamiyama of Waseda University, chaired by the University of Tokyo.
On the way, a 14-member wood-based structural expert committee including teachers from Nihon University and others from the Ministry of Construction) A simple calculation system on the setting method of the arrangement balance is also reported in more detail by the present inventor,
At the level of the building contractor, the fact that it is possible to easily check the distribution of frames has been accepted, and it has been possible to progress to the Minister's accreditation.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the accompanying drawings. Figure 1 shows the front, flat, and side cross sections of the frame body. Production is to be performed at a specific factory where quality control is thoroughly performed (specified in the Minister's Certificate as specified). It is a standard product that cuts an equilateral angle iron into a predetermined size, then electrically welds each contact to form an accurate shape, passes dimensional inspection, and then dipped in hot-dip galvanized steel to prevent long-term rust. In addition, the "Minister of Construction Certification Number" and "Manufacturing Inspection Certificate" engraved with the manufacturing order number shall be caulked on the middle frame of the product as aluminum plates, respectively. It is also specified in the Minister's certificate.

[0012] In the case of a standard type in which a frame manufactured at a specific factory is inserted between wooden pillars at a distance of 910 mm and a so-called three-foot length, an outline of the positions of binding bolts and a part for vertically attaching the first and second floors are also provided. 2 is shown in FIG.

FIG. 3 is a perspective view of the standard type on the first floor for each joint and the construction procedure at the new construction site in order to clearly understand the order of the codes, but FIG. In addition, anchor bolts are accurately embedded in predetermined dimensions according to FIGS. 6 and 11, and the foundation is attached after solidification and curing of concrete. On the date of construction of the frame, first the frame of the seismic product is slowly suspended at the anchor bolt position by using a crane. Lower it, fix it on the base of the hole, temporarily tighten the nuts, and tension the rope in two directions from the upper frame to make the frame self-supporting.

The same applies to the case where there are a plurality of frames. Next, the columns are sequentially built, and the second floor beams are assembled. Drop the through bolt and temporarily tighten the nut. Next, the second floor pillars are also erected one after another, and the hut beams are hung to complete the construction of all the frames. However, in the case where the second floor (or the third floor) is to be continuously attached to the frame on the first floor and the upper and lower sides, the through bolts are tightened together with the two frames with the beam interposed therebetween. (See Fig. 2)

Immediately after the construction of all the frames is completed, the swing-back correction is made around each corner post, and the temporary braces are attached finely, and then the various bolts for the frames and the frame bolts are fully tightened. The lag screw from the vertical frame is also tightened to complete the entire frame process without any special technique or time.

FIG. 4 shows a detailed view of the frame assembly in the case of vertically mounting in a three-story building.

The cross-sectional shape of the reinforced cloth-type foundation concrete having a large role of receiving the shaking from the upper floor and further reliably transmitting the shaking to the ground, and the method of mounting the anchor bolts for fixing the frame with high precision are described. FIG. 5 is a schematic perspective view.

FIG. 6 shows details of the anchor bolts penetrating the lower frame and the base of the frame.

The details of the through bolts between the upper frame of the frame, the second floor (or the third floor) beams, and the lower frame when the frame is continuously mounted even on the second floor (or the third floor), and the dimensional difference of each building can be simplified. FIG. 7 shows details including the “height adjustment pillow material” that can be processed in the above manner.

FIG. 8 shows details in which the upper frame of the frame is attached by the upper beam and the through bolt.

FIG. 9 shows the details of accurately placing the frame even on the true wall of the one-sided Japanese room by swinging the mounting position.

In the case of a layout with a long frontage direction of the building and a side-by-side or continuous main room, the phenomenon of bending inward or outward around the center of the frontage may be considered to be suitable for strong earthquake shaking. FIG. 10 is a plan view and a cross-sectional view showing a fitting in which a frame on a long axis and a frame are connected and arranged in a T-shape as an ideal shape of a resistor.

The details of the plane showing the positions of the upper and lower bolt holes of the frame to be inserted into the wall with the columns having a pitch of 910 mm (commonly called three-square) were set for the two columns on the left and right with different cross-sectional dimensions. FIG. 11 shows a case study.

FIG. 12 shows a model plane plan for estimating the appropriateness of the frame arrangement, with the center line and each interval dimension clearly specified for the sake of convenience because the calculation formula itself showing the basis of the numerical values is a proposition of the present application.

In addition, in order to respond to the criticism of the inventor's advantageous layout in the estimation, the original plan was avoided from the original work, and the Japan Housing and Wood Technology Center was established in November 1995 by Tadotsu Engineering in Shikoku. At the test site, a full-scale shaking experiment of the same scale as the Great Hanshin Earthquake was conducted, and the details are widely disclosed with the meaning of public data.
The building specification was used as a model, and it is the same as the center evaluation review material described above, which was created and submitted with annotations.

[0026]

Since the present invention is constructed as described above, the following effects can be obtained.

[0027] The free layout and the sense of openness with a large opening, which are the characteristics of a wooden frame traditional construction method, make it possible to create a unique living space that cannot be fulfilled by other wooden construction methods.
On the one hand, there is also the danger that the construction will be carried out with a bias in the structural strength due to the lack of flexibility, so as a countermeasure, at first in the design stage, fragile parts are rationally supplemented by inserting frames and the whole building A simple calculation system according to the present invention makes it possible to realize an appropriate proof stress balance.

Further, in preparation for a large earthquake that is expected to far exceed the set value on the desk, the wall magnification and the wall amount close to twice the current legal provisions of the entire building may be measured by inserting a large number of frames. With this simple calculation system, the distribution can be easily performed without difficulty so that the reverse imbalance in which only a part of the proof stress protrudes does not occur.

A part of the recorded video of the full-scale vibration experiment at the Tadotsu engineering test site conducted by the Japan Housing and Wood Technology Center has already been distributed for a fee.
In terms of its contents, even if it is a wooden frame traditional construction building set to the same strength as the Building Standard Law provisions, it will not collapse even if the Hanshin Great Earthquake class earthquake is installed if the wooden shaft braces are properly fastened as a source of strength It is undeniable that the official position of adhering to the current laws and regulations is undeniable, but in the image, the sideboard placed on the first floor at 2 seconds after the quake falls violently It was clear that if a family member was in front of him, he would have been laid down immediately without escaping, and even in the great earthquake disaster the damage to the building including dead and completely collapsed was reported in all media, Few lessons were reported about the number of injuries caused by the fall of household goods, which should have been several times the number of deaths, and the lesson learned from the experimental video was that it was twice as resistant to current legal provisions. If it were simply structured, the shaking would be almost half even if considered simply, so the number of injuries caused by falling should have been reduced to about half, and even architects recommending commercial furniture fall fasteners in the media. The present inventor shouts, "Be shameful as a technician involved in construction," and shouts out, and he firmly believes that the ultimate effect of the present invention is to halve the earthquake shaking of the building.

[Brief description of the drawings]

FIG. 1 is a standard front view, flat cross-section, and side cross-sectional view of a frame main body.

FIG. 2 is a front view of a frame housed in a wooden frame.

FIG. 3 is a perspective view in which a frame is accommodated in a wooden frame.

FIG. 4 is a frame diagram in a case where a frame is continuously mounted vertically on a three-story building.

FIG. 5 is a cross-sectional view of a cloth-type foundation concrete and a high-precision mounting method of anchor bolt positions.

FIG. 6 is a detailed view of an anchor bolt penetrating a frame lower frame and a base.

FIG. 7 is a detailed view of an upper and lower continuous frame and a through bolt that are sandwiched between a second floor (or third floor) beam and a height adjusting pillow material.

FIG. 8 is a detailed view showing how a hut beam, a height-adjusting pillow material, and a frame upper frame fit.

FIG. 9 is a detailed view showing how to fit the frame when one surface of the indoor wall is a Japanese-style room.

FIG. 10 is a detailed view of a case where frames are attached in a T-shape.

FIG. 11 is a detailed view showing the positions of the bolt holes in the upper and lower frames of the frame.

FIG. 12 is a model plan view for a simple calculation system configuration in a frame arrangement.

[Explanation of symbols]

1. Frame dedicated anchor bolt φ16mm L6
00mm galvanized 2. 2. Cloth-type foundation concrete with steel reinforcement Foundation 5. Pillar 6. Pillar 7. 7. Height-adjustable pillow (same quality as beam) Round cap, galvanized φ6mm L120
mm (4 on both sides) 9. 2 (3) floor beams 10. 10. Penetration bolt (2 places) φ16mm L-placed / galvanized Lug screw φ12mm L7
0mm ・ Zinc plating 12． 12. Penetration bolt (In the case of pillow material 90mm or more, one additional bolt is attached at the center) 13. Stud (up and down separation frame with a screw) Reinforcement plate (factory weld galvanized) 130m
m × 65 mm × 10 mm 15. Top end leveling mortar 16. Medium belt frame (welded with main frame at factory and galvanized) Bracing frame (same as above) "Ministry of Construction Certification Number Certificate" (aluminum plate, caulking) “Production inspection certificate”
Top) 20. Pillar 21. Kyoto wall 22. Lath board (painted wall base) 23. Gypsum board (cloth base) 24. Lug screw φ9mm L 60
mm ・ Zinc plating 25. Shimojibashi 26. Without walls 27. Tatami mat 28. Tatami 29. Baseboard 30. Flooring 31. Floorboard 32. Joist 33. Receiving joist

Front Page continued (51) Int.Cl. ⁶ identifications FI E04B 2/56 622 E04B 2/56 622B 622H 632 632B 632C 632D 632H 651 651A 651L 652 652K E04H 9/02 311 E04H 9/02 311

Claims (3)

[Claims] (1) In the case of a new construction design of a wooden frame conventional construction method, when the most important load-bearing wall for seismic resistance is to be arranged in a balanced manner over the entire building, it is necessary to obtain a large opening in the southern part due to the layout. It is a reality that only small-width bearing walls can be installed. However, high-strength steel braces are installed inside the small-width (commonly known as 3 shaku) walls. (Referred to as “OK frame” or “frame” in accordance with the approval) to secure a sufficient amount of wall for a large load-bearing wall. And depth
In the direction between the beams, "the numerical value obtained by dividing the amount of the wall on the axis having the load bearing wall by the length of the axis", that is, how much the amount of the wall works per meter of the axis is compared for each axis. The smaller the difference is, about 0.1 to 0.3, the less the eccentricity of one building is, and the difference is 0.5
If it exceeds the width, OK into the wall on the missing axis
Attempting to insert additional frames, dividing the increased wall volume by the length of its axis again, and repeatedly calculating the reduction of the difference, a simple addition / subtraction multiplication / division calculation without relying on sophisticated computer analysis. Configuration of a simple calculation system that enables to adjust in advance the torsion and collapse phenomenon of a building during an earthquake caused by eccentricity. 2. It is assumed that the shape and strength already specified in the Building Standard Law such as an OK frame exceed the specified values in a different form, and if it is desired to be approved by the Minister of Construction, In the preliminary screening process, the Japan Building Center was rated, and the prerequisite for receiving the rating was the character and authority of a public institution. The Japan Housing and Wood Technology Center presented four consecutive test reports. However, in this frame, before the four bodies, each body undergoes a body test twice, one body at a time,
When a large horizontal force is applied to the top of the frame from the side,
As a result of immediately experiencing the actual state in seconds of the partial deformation that occurs first at the anchor bolt position that holds the lower frame, which is the maximum point that resists the entire frame deformation, the bolt position is determined to be 70 mm from the outer surface of the vertical frame, and A 10mm thick iron plate is pre-welded to the lower frame as a standard product in the frame manufacturing process to reinforce the bolt position. 3. In the implementation of the above claims 1 and 2, with the result of the combined use of the proof stress and the rational simple calculation system, the center rating and the minister's approval are both accepted from the first floor to the second floor and three more. A seismic construction method in which frames are inserted continuously up and down to the floor. However, when applied to a three-story building, a 6 mm thick reinforced triangular plate is pre-welded to the lower and vertical corners of the first-floor frame, which has the greatest load bearing capacity, as a standard product. It is an additional condition that hall down hardware of a general three-story standard product is also used in the base of the building.