JPH01247660A - Rebuilding method for steel frame pillar - Google Patents

Abstract

PURPOSE:To make a correction favorably performable in terms of working property by predicting any change in a building position quantitatively on the basis of experimental data, compensating it in direction and quantity to be changed to a scheduled building position of other steel frame pillars on the basis of the value, and performing each position change. CONSTITUTION:A displacement direction D0 and a displacement value A0 to an upper end position P'0 and a scheduled building position of a central steel frame pillar C0 among nine steel frame pillars C0-C8 being set up in grille form are detected with a three-dimensional surveying system 1. Next, plural pieces of wires 2 is stretched in the circumferential direction and this tensile condition is adjusted into correction to the scheduled building position and temporarily locked. Then, displacement directions D1-D8 and displacement values A1-A8 to each building position of the remaining eight steel frame pillars C1-C8 are detected as well, and these steel frame pillars C1-C8 are corrected to the scheduled building position on the basis of the value and experimental data. Rebuilding takes place at each block B, and the steel frame pillars C and steel frame girders G are connected together in an assembling state, while the steel frame pillars C and the steel frame girders G extending over in an interval between adjacent blocks B and B are also connected together in this assembling state.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for rebuilding each of a plurality of steel columns, which are interconnected by beams and erected in a temporarily assembled state, into a planned erecting posture. .

[Conventional technology]

When rebuilding a steel column, multiple steel columns are connected by beams, even if temporarily, so if you change the erection posture of the steel column, other steel columns connected to it via the beams will be damaged. The posture of the pillars also changes accordingly. Therefore, when rebuilding, for example, the direction and amount of displacement of each steel column's erection position relative to the planned erection attitude is detected using a plumb bob or three-dimensional surveying system, and the direction opposite to the detected displacement direction is detected. When changing the posture of a steel column using the detected displacement amount as the correction direction, the steel column can be placed in the planned erection posture once, but the planned erection will be changed due to the posture change for rebuilding other steel columns. The posture will be different.

Therefore, in the past, the direction of detected displacement, the amount of detected displacement,
In other words, when a worker looks at the construction state, he or she can determine the posture changes associated with the posture changes between the steel columns, such as how to change the posture of which steel columns and how to change the posture of the steel columns. means for determining the condition, correcting the correction direction and correction amount based on the detected displacement direction and detected displacement amount based on the judgment, and changing the posture of the steel column using the corrected correction direction and correction amount. (I can't cite any references).

[Problem to be Solved by the Invention] However, when using the above-mentioned conventional means, although the building is rebuilt with the corrected correction direction and correction (2), the correction is left to the operator's judgment, so it is inevitable to ensure accuracy in the correction. It is easy to chip or become uneven. Therefore, it is often the case that the steel column is not corrected to the planned erection posture only by correcting the posture by - degrees, and as a result, the rebuilding work is performed through trial and error, resulting in poor workability.

An object of the present invention is to provide a method that can rebuild steel columns with good workability.

[Means for Solving the Problems] The feature of the steel column reconstruction method according to the present invention is as follows: [11] For each of the predetermined steel columns with multiple failures, the displacement direction and displacement amount with respect to the erection posture are detected, and [21 Based on the experimental data, quantitatively predict the change in the erection posture of each prescribed steel column in its erection state when changing the erection posture of other prescribed steel columns, [3] Based on the predicted values. , the basic correction direction and Kyomoto correction direction to the planned erection posture of each predetermined steel column calculated from the detected displacement direction and detected displacement amount, and the erection posture change due to the correction of the erection posture of other predetermined steel columns. [4] Change the posture of each of the prescribed steel columns using the corrected direction and amount of correction, and then: The purpose is to connect predetermined steel columns and beams spanning between the predetermined steel columns in a wooden frame. Its actions and effects are as follows.

[For production]

Based on experimental data, the posture change of each steel column due to the posture change of other steel columns is quantitatively predicted, and based on the predicted value, the correction direction and amount are corrected, so the correction is made uniformly. By increasing the number of experimental data to be prepared, it is possible to further improve the accuracy of correction of the direction and amount of correction. Then, in order to correct the posture of the steel column with the corrected correction direction and correction amount, that is, the correction direction and correction amount that take into account the change in posture of each steel column due to the change in the posture of other steel columns,
When correcting each of the steel columns to the planned erection posture or a posture close to it, the work of correcting the posture of each steel column only needs to be done once.

〔Effect of the invention〕

Therefore, according to the present invention, each of the steel columns can be corrected to the planned erection posture or a posture close to it with good workability.

〔Example] Next, examples of the present invention will be shown.

As shown in Figure 4, a plurality of steel columns (C), which are erected in a temporary manner with adjacent steel beams (G) connected to each other, are each placed in a predetermined erection posture (generally vertical As shown in Figure 4, this is a rebuilding method in which the steel column group is divided into multiple blocks (B) each consisting of nine steel column groups arranged in a square shape. , each block (B) is rebuilt and the steel columns (C) and steel beams (G) are connected in a wooden structure, and the steel beams (G) and steel columns (C) that span between adjacent blocks (B) are rebuilt. ) and connect them in a wooden structure. Note that the bolts for connecting the steel frame column (C) and the steel frame beam (G) are temporarily tightened with a constant torque in the temporarily assembled state, and are fully tightened in the wooden frame state.

To rebuild the block (B), as shown in Figures 1 and 2, the central steel column (C0) of the nine steel columns (C) is corrected to the planned erection position and temporarily fixed. It consists of a first step and a second step in which the surrounding eight steel columns (C, to CS) are corrected to the planned erection posture and fixed.

As shown in FIG. 2, the first step is to measure the upper end position (po') of the central steel column (C0) using a three-dimensional surveying system (1),
Based on the measurement results and the normal upper end position (po) when the central steel column (CO) is in the planned erection posture, the displacement direction (Do) of the erection posture of the central steel column (C0) with respect to the planned erection posture ) and the amount of displacement (8.), that is, the detection step of detecting the direction and amount of displacement of the upper end position (Po") with respect to the normal upper end position (po), and the detection step of detecting the direction and amount of displacement of the upper end position (Po") with respect to the regular upper end position (po), wire (2)
By tensioning and adjusting the tension,
Correction to change the posture of the central steel column (Co) by an amount equal to the detected displacement amount (80) in the direction opposite to the detected displacement direction (Do), correct it to the planned erection posture, and temporarily fix it. It consists of a process.

The second step is Eight steel columns after the first step (C.

A detection step of detecting the displacement direction (Dt-08) and displacement amount (Al-A11) of the built-in posture of ~C,) with respect to the planned built-in posture using the same means as the detection step of the first step; Based on the detected displacement direction (at~D8) and detected displacement u (8, ~A8), and the experimental data, the steel column (C, ~
C8) is corrected to the planned erection posture and fixed.

As shown in FIG. 1, the second correction fixing step is as follows:
Suppose that one of the eight steel columns (C+ to Ca+) is connected to the central steel column (C0) via a steel beam (G).
One is the first steel column (C3), and the first steel column (C2)
2nd and 3rd steel columns located in order counterclockwise based on
, 4th, 5th, 6th, 7th, 8th steel columns (C2 to CO
), as shown in Fig. 1, the first steel column (C1) is fixed with two wires (3), and the first steel column (C1) is fixed with two wires (3).
Between CO and the third steel column (C1), the third steel column (C3)
and the fifth steel column (C3), and between the fifth steel column (C2) and the seventh steel column (C1), respectively.
Places for attracting (bl), (bz), (b
3), and each of the second steel column (C2), fourth steel column (C4), and sixth steel column (C8) and the central steel column (
The first, second, and third separating places (b, "), (b2'), (b3') are stretched between C0), and in that state, each place (b, ~b :+), (b,'~b3
This is done by expanding and contracting each of the parts (2) and (4) via electric turnbuckles (4). In addition, the first steel column (C+
) and the seventh steel column (C7), and between the central steel column (C
0) and the eighth steel column (C8).
Once the postures of the seventh steel column (C, to C,) are determined, the erection posture of the eighth steel column (C8) is automatically determined, so there is no need to provide a place.

The amount of expansion and contraction of the pulling place (bl-b3) and the pulling place (b, "~b3") is determined as follows.

Now, the amount of axial deflection between the steel beams (G) due to the change in the posture of the steel column (C) is sufficiently small compared to the displacement of the steel column (C), and can be ignored in practice. Based on the premise, the central steel column (C0) is the origin (0,0), and the direction connecting the central steel column (CO) and the first steel column (C1) is X.
In the axial direction, the central steel column (C0) and the third steel column (C3)
Assuming a coordinate system in which the direction connecting the above is the X-axis direction, the drawing place (b + ).

1st, 3rd, 5th, 7th steel columns (CI), (C3), (cs) by shrinking (β2), (β3)
, (ct) around the origin are β1. β
2. β3. Assuming β4, [+] If the first attracting place (b,) is expanded or contracted, (['l] If the second attracting place (β2) is expanded or compressed, [[11] When the drawing place (β3) of No. 3 is expanded or contracted, the following relational expressions are established geometrically.

Note that extending the first pulling place (bl) means shortening the first pulling place (b + '), and the second and third pulling places (bz).

Regarding (β3), the second and third separating places (b
2') and (b3').

and the regular upper end position (p) of each of the first to eighth steel columns (C+ to cn) in the planned erection posture.

~PIl) coordinate values, β2. West IP41
P51p6. p7. r+, and the coordinate values of the upper end positions (P1゛~P6゛) in the built-in posture are P1'+, respectively.
P2'+P3ZP4ZP S'1P6Z117ZP[l
゛, then for each case of [+] [ul]EIII'1, P+'-K(θ,)・μβ2°= K(θ,)・L(θ's・p1+K(β1
)・K(−β2)・p.

+ L(-β1)・K(-β2)・p3p, −K(-
β2)・-3 04″-K(-02)・L(03)・p.

+K(-02)・K(-θ:l)・t.

+L(-β2)・K(β3)・t.

? ,'= K(-β3)・β5 I)6″-K(-β3)・L(-β4)・Ps+ K
(-β3)・K(-β4)・p6shiL(-β3)・K(
-β4)・4p,”−K(β4)・07 pa'= K(β4)・L(−θ−)Pv+K(
β4)・K(-θ, )・p80L(β4)・K(-θ,
)・pl holds true.

Here, the first, third, fifth, and seventh steel columns (CI),
The distances between each of (c:l), (cs), (C7) and the central steel column (Co) are L+, Lz, Lx, β4, and the pulling places (b+), (bz), (β3) The amount of shrinkage of Xl+X2. Assuming X3, in the case of [1], β1= C1・β2 ......[
1] θ3- C2・β2...
・[3]θ4- C3・β1...
...[4] In the case of [11], θ, = β1・β2 ......[
5] θ2−−β2・β3 ・・・・
... [6] θ4−−β3・β3
...... [8] In the case of [1111, θ+= TI・β2 ・・
... [9 pieces θ2-~T2・β3
......[10;β3- T3・β4
...[11].

Through experiments using the model and actual reconstruction, we determined that the above formula [1 ]～[
12] and convert it into data, [+
] [n] [Ir] The posture change of the steel column (CI"Cs) in each case is quantified and predicted using the above formula.

Next, based on the predicted value, the detected displacement direction (D, ~
Ds) and the detected displacement '2 (A, ~A8), the basic correction direction and basic correction amount are calculated from other steel columns (C
, ~C,) is corrected to a value that changes each of the steel columns (CI-CO) to the planned erection posture by absorbing the change in the erection posture caused by the correction of the erection posture. Places (b, to b3), (
Find the amount of expansion and contraction of b,' to b, ゛).

In reality, due to manufacturing errors in the joints between steel columns (C) and steel beams (G) and unavoidable variations in the length of steel beams (G), all steel columns (C) are not as planned. Considering that it is impossible to accurately position the steel column in a crowded posture, we use the extreme value search method to locate the steel column (CI
-cs) respective upper end positions (p, II to p, l')
This is the value that minimizes the sum of squares of the displacement amount from the normal upper end position (p+ to pe).

Note that when determining the amount of expansion and contraction of the first places (bt) and (bt''), the coordinate values (? ,”~l
11g'), but the second place (bz), (
When determining the amount of expansion and contraction of Using the coordinate values of the position, the third place (b3),
When determining the amount of expansion/contraction of (bt'), the first and second places (bt), (bl'), (b
2) Use the coordinate values of the upper end position of the steel column (C, ~ce) assuming that (b2') is expanded and contracted by the determined amount of expansion and contraction. In other words, the first to third places (
b,~b,).

When optimizing the amount of expansion/contraction of (b, ~b3''), instead of optimizing at once using the coordinate values (p, '~t, ゛) of the detected upper end position (P, ~P8゛), , it is easier to calculate by doing it step by step.

As shown in FIG. 3, the electric turnbuckle (4) is interposed between the ends of two place materials (b), (b), and The place is expanded or contracted by changing the distance between the ends of the place.An example of this is shown below.

As shown in FIG. 3, two frames (5A) are fixed to the ends of the place materials (b) and (b).

(5B) is attached to one guide frame (6) so as to be slidable only in the far and near direction, and a screw shaft (8) driven by an electric motor (7) is attached to one frame (58), The screw shaft (8) is attached to the guide frame (6).
) is fixed with a nut (9) which is screwed onto the first threaded portion (8A) of the frame and which moves one frame (5A) and the guide frame (6) relative to each other in the far and near directions by rotation of the threaded shaft (8). , the screw shaft (8) is attached to the other frame (5B).
), the first threaded part (8A) is screwed into the second threaded part (8B), which has a thread opposite to the first threaded part (8A), and the other frame (5B) is connected to one frame (5^) by rotation of the screw shaft (8). It is constructed by fixing a nut (lO) that moves it in the distance direction.

Note that the calculation for optimization and the control of the electric turnbuckle (4) based on the calculation are performed using a computer (11), as shown in FIG. 2.

[Another example]

Another example of the present invention will be shown below.

[1] In the above embodiment, the first to third places (bt
-bt) and (bt' to b3') were optimized in stages, but the optimization may be done in - degrees.

[2] In the above embodiment, the steel column group was divided into blocks such that there was no common steel column (C) between the blocks (B).
As shown in Figure 5, there are three common steel columns (C) between adjacent blocks (B), and as shown in Figure 6, there are 6 steel columns (C) common between adjacent blocks (B). It is also possible to carry out the process by dividing the steel frame columns into blocks while there are books. In the former case, the number of steel columns (C) to be modified is six in blocks other than the first block, and in the latter case, it is three, which facilitates optimization of modification.

[3] In the above example, one steel column (C0) is corrected to the planned erection posture by taking advantage of the small amount of axial deflection between the steel beams (G), and the steel frames located around it are corrected. Pillar (
C, ~CS) corrected to its planned erection posture (
CO), but the posture may be corrected by pulling each of the steel columns (C) in the x and y directions with a wire or the like.

41 In the above embodiment, the steel column group is divided into blocks,
Although the posture is corrected for each hook, the direction and amount of correction may be optimized for each steel column (C) without dividing into blocks.

[51 Targeted steel columns (C) include not only those that serve as columns by themselves, but also steel-framed concrete columns, steel-framed concrete columns that constitute steel-framed reinforced concrete columns, and steel-pipe concrete columns.

[Brief explanation of the drawing]

Figures 1 to 4 show embodiments of the present invention, with Figure 1 being a plan view of the main parts, Figure 2 being a perspective view, Figure 3 being a sectional view of the turn handle, and Figure 4 being a plan view. 5 and 6 are plan views showing another embodiment. (C)... Steel column, (G)... Beam.

Claims (1)

[Scope of Claims] A method for rebuilding each of a plurality of steel columns (C), which are interconnected by beams (G) and erected in a temporarily assembled state, into a planned erection posture, [1] For each of the plurality of predetermined steel columns (C_1 to C_n), the displacement direction (D_1
~D_n) and the displacement amount (A_1~A_n), [2] Based on the experimental data, detect the other prescribed steel columns (C_1~C_n) of each of the prescribed steel columns (C_1~C_n) in the erection state. [3] Quantitatively predict the change in the built-in attitude due to the change in the built-in attitude; [3] Based on the predicted value, the detected displacement direction (D_
1 to D_n) and the detected displacement amount (A_1 to A_n), the basic correction direction and basic correction amount to the planned erection posture of each predetermined steel column (C_1 to C_n) are calculated from the other predetermined steel columns (C_1 to C_n). The predetermined steel columns (C_1 to C_
n) in the direction and amount to change the planned erection posture or a posture close to it, [4] Change the posture of each of the predetermined steel columns (C_1 to C_n) using the corrected correction direction and correction amount, and then, A method for rebuilding a steel frame column in which predetermined steel frame columns (C_1 to C_n) and beams (G) extending between the predetermined steel frame columns (C_1 to C_n) are connected in a wooden frame state.