KR100773385B1 - Precise prestress introduction method which high-strength steel against i beam again and used the bolt hole perforation part for connection assembly at the time of prestress introduction - Google Patents

Abstract

A precise prestress introduction method using a bolt hole forming part for assembling I-beam segments when introducing prestress by fixing high strength steel to the I-beam segments is provided to prevent the inside of a bonded surface of the high strength steel from being corroded by welding four edges of the bonded surface. Connecting part bolt hole forming parts(130) are assembled with I-beam segments(100). Lateral rows of rear ends of upper and lower flanges(110) of the connecting part bolt hole forming parts are more expanded than the other bolt hole forming part. A high strength steel(220) of a lower flange is moved into the central part. A high strength steel(210) of an upper flange is moved to the outside of the end. The upper and lower flanges of the I-beam segments are attached to the high strength steels to load the steels on the lower flange. The slid volume between the I-beam segment and the attached steel is mutually adjusted. Large diameter high tensile bolts(300) are inserted in the bolt holes to bond the I-beam segments with the high strength steels.

Description

Precise prestress introduction method which high-strength steel against I beam again and used the bolt hole perforation part when prestress is introduced by adding high strength steel to I beam segment for connection assembly at the time of prestress introduction}

The present invention relates to a precise prestress introduction method using a bolt hole perforation for I beam segment connection assembly when the prestress is introduced by adding a high strength steel to the I beam segment.

In general, the production hypothesis of steel I-beam bridges has been used in the construction of bridges by cutting plate steels along the length of bridges, but the method of producing beams of bridges by cutting and welding plate steels is expensive. It has been recognized as an uneconomical construction method because it takes a lot of time. In addition, when the H-shaped rolled steel, which is a ready-made product, is used, the maximum size of the rolled steel produced in Korea is 808 mm in height and only 302 mm in width. It is not used for bridges right away, so it is only used for small bridges.

Due to these limitations, the situation is mainly used for auxiliary construction structures.

Recently, as a method of overcoming these limitations, a method of increasing the load capacity of H-type rolled steel by the tension force of PS steel is used, but buckling occurs when the tension force is introduced, and the fundamental stiffness reinforcement of the beam itself is not achieved. Due to the limitation of usability, it is difficult to lengthen the bridge, the PS steel is exposed to the outside, there is a risk of damage due to external force and the loss of prestress according to, and the appearance is not beautiful.

Thus, in order to solve the problems described above, there was also proposed a method of manufacturing H-shaped rolled steel beams in which pre-stress is introduced into H-rolled steel produced using high strength steel plate and high tension bolt. .

1 to 6, as shown in FIGS. 1 to 6, the I beam segment 100 is attached to the upper and lower flanges 110 and 120 by applying a high strength steel 210 and 220 to the I beam segment 100. The bolt hole 130 is drilled in the upper and lower flanges 110 and 120 and the high-strength steels 210 and 220 separately from the boring portion of the connection bolt hole 130 for the I beam segment 100 and the high-strength bolt 300. After temporarily assembling the steel materials 210 and 220, a part is welded under load, and the high tension bolt joint is fully assembled with the high tension bolt 300 without welding, thereby introducing prestress.

Conventional Patent No. 10-0449230 having the configuration as described above has the following problems.

First, the conventional patent has a longitudinal direction between the I beam segment 100 and the high-strength steel (210, 220) padded on the upper and lower flanges (110, 120) when a load for prestress is introduced into the I-beam segment (100) In order to precisely introduce prestress, the vertical jungle phenomenon must be absorbed and adjusted for perfect contact between the upper and lower flanges 110 and 120 of the I beam segment 100 and the padded high strength steels 210 and 220. In actual production, the lower part of the high-strength steel padded to the 15m I-beam segment is pushed outward 5 mm in both directions, and the high-strength steel of the top part is pushed inward 5 mm around, but there are a large number of edges near both ends. The I-beam segment 100 and the high-strength steels 210 and 220 are mutually restrained in advance by the high-tensile bolt 300, so that the rolling phenomenon is at both ends. Absorption adjustment is not performed, and the absorption surface is adjusted by buckling and lifting of high strength steel at the joint surfaces of the upper and lower flanges 110 and 120 of the I beam segment 100 and the high strength steels 210 and 220. As a result of welding welding at, the pre-stress is not introduced and the high-strength steels 210 and 220 are buckled and lifted, and thus the durability is deteriorated.

Second, the conventional registered patent is a non-welded part by joining the high strength steel (210, 220) by the high-strength bolt is bonded to the I-beam segment 100 upper and lower flanges (110, 120) and the like due to moisture penetration during use Corrosion-causing factors exist throughout the joining surfaces of the high-strength steels 210 and 220 (welding section + non-welding section).

Third, the conventional patent has a plurality of upper and lower flanges (110, 120) in the upper and lower flanges (110, 120) separate from the punched portion of the connection bolt hole 130 for assembling and connecting the I beam segment 100 for pre-stress introduction to the I beam segment 100 Since the I-hole segment 100 and the high-strength steels 210 and 220 are fixed by the high-strength bolt 300 by forming a hole in the bolt hole 130, the quantity of the high-strength bolt 300 is greatly increased, thereby increasing the construction cost and aesthetics. It is very poor and there are disadvantages in maintenance.

Therefore, the present invention has been devised to solve the problems described above, and can naturally adjust the amount of sliding of the I-beam segment and the high-strength steel to be padded, so that the I-beam segment and the high-strength steel to be padded are closely adhered and precise. Prestress can be introduced, and all four sides of the I-beam segment and the bonded high-strength steel joint are welded to prevent corrosion due to moisture penetration inside the joint, and construction cost is reduced by drastically reducing the amount of high-strength bolted joint. The purpose of the present invention is to provide a method of introducing precise prestresses using bolt hole perforations for I beam segment connection assembly when the prestress is introduced by adding high strength steel to the I beam segment to improve aesthetics and to easily maintain.

Precise prestress introduction method using bolt hole perforations for connecting I beam segments when adding prestressed steel by adding high-strength steel to the I-beam segments for achieving the above object. The perforations of the upper and lower flanges of both ends are extended and drilled more than other bolt hole perforations, and the high-strength steel of the lower flange is drilled in the same scale at the extended perforated position on the lower flange of the I-beam segment, The inner portion of the upper flange is drilled by moving to the inner side of the central flange, and drilled on the same scale at the position of the extended flange of the upper beam of the I-beam segment. I beam with high strength steel on flange and load After the amount of sliding between the segment and the high-strength steel is mutually adjusted, a large diameter high-tension bolt larger in size than the high-tension bolt used for the other bolt hole perforation is inserted and fixed in the expanded perforated bolt hole to fully adhere the I-beam segment and the high-strength steel to which the pad is applied. Afterwards, four sides of the high-strength steel is welded to the I-beam segment.

Precise prestress introduction method using a bolt hole perforation for connecting I beam segments when assembling a high strength steel to the I beam segment according to the present invention having the configuration as described above, the I beam segment and the high strength steel The amount of sliding can be naturally adjusted and the I-beam segment and the padded high-strength steel can be completely adhered and precise prestress can be introduced. Corrosion can be prevented by infiltration, and the construction cost is reduced, the aesthetics are improved, and maintenance is easy by greatly reducing the amount of high tension bolts.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

7 is an exemplary view showing a state in which a high-strength steel is padded on the upper and lower flanges of the I-beam segment according to the present invention, FIG. 8 is an enlarged view of an enlarged portion "A" of FIG. 7 is an enlarged detailed view of part "B", and FIG. 10 is loaded with the beam in FIG. 7 to fix both ends of the I beam segment and the upper and lower high strength steel padded with high tension bolts after the adjustment, and the I beam segment and the high strength. 11 is an enlarged view illustrating portion "C" of FIG. 10 in an enlarged view, and FIG. 12 is an enlarged detail view of "D" in FIG. 10, and FIG. 13 is an exemplary view showing a state in which the large diameter high-tension bolts fixed at both ends after removing the load in FIG. 10 are removed and perforated parts of the upper and lower high-strength steel bolts are drilled in accordance with the punching standards drilled in the upper and lower flanges of the I beam segment. 14 shows an "E" portion of FIG. 12. 15 is an enlarged detailed view of part "F" in FIG. 12, FIG. 16 is a sectional view taken along the line AA of FIG. 12, FIG. 17 is a sectional view taken along the line BB of FIG. It is sectional drawing of the CC line of FIG. 12, and FIG. 19 is sectional drawing of the DD line of FIG.

As shown in these drawings, when the pre-stress is introduced by applying a high-strength steel to the I-beam segment according to the present invention, the precise pre-stress introduction method using the bolt hole perforation for connecting the I-beam segment assembly connects the I-beam segment 100 I beam segment connection part for assembling bolt hole 140 The perforated ends of the upper and lower flanges 110 and 120 at both ends of the perforated part extends more than the perforated part of the bolt hole 130, and the high strength steel of the lower flange 220 is padded. The hole is drilled in the same size at the position extended to the lower flange of the I beam segment, and moved to the inner side of the central portion as much as the amount of sliding during load loading, and the high-strength steel 210 of the upper flange is padded to the I beam segment upper flange. Drill in the same size at the expanded drilled position, but move to the outside of the end part by the amount of sliding in the case of loading After applying high strength steel (210, 220) to the flange and loading the load, the amount of sliding between the I beam segment and the high strength steel (210, 220) is mutually adjusted, and then used in the other bolt hole perforation in the expanded perforated bolt hole (140). After inserting and fixing the large-diameter high-tension bolt 310 having a larger size than the high-tension bolt, the I-beam segment 100 and the padded high-strength steels 210 and 220 are completely adhered to each other, and then the high-strength steel 210 is attached to the I-beam segment 100. , 220) is welded by four sides welding.

Here, the load is introduced into the prestress by the electronic control system of two or more points to introduce the prestress by the hydraulic jack.

In addition, the lower high strength steel 220 is attached only to the lower flange 120 of the I beam segment 100 to the I-beam segment 100 into which the pre-stress for the constant moment section is introduced.

The high strength steels 210 and 220 may use any one of steel sheet, I beam, H beam, L-shaped steel, and c-shaped steel.

In addition, the welding of the I beam segment 100 and the high strength steels 210 and 220 welds the high strength steels 210 and 220 to four sides in the longitudinal direction and the transverse direction of the I beam segment 100.

Hereinafter, the construction procedure of precise prestress introduction using the bolt hole perforation for I beam segment connection assembly when the prestress is introduced by adding a high strength steel to the I beam according to the present invention having the above-described configuration will be described.

Precise prestress introduction method using bolt hole perforations for I beam segment connection assembly when prestress is introduced by adding high strength steel to I beam segment according to the present invention 1) I beam segment 100 ) Perforations in the upper and lower flange abdomen for the bolt hole 140 for assembling the connection.

That is, the boring portion of the upper and lower flange 110 and 120 bolt holes 140 at both ends of the I-beam segment 100 may use a large diameter high-tensile bolt 310 having a larger size than that of the other transverse single row bolt hole 130. To perforate to expand.

2) The high strength steels 210 and 220 bonded to the upper and lower flanges 110 and 120 of the I-beam segment 100 are short in the high strength steel of the lower flange to which the load is loaded, and the high strength steel of the upper flange is jungle. After protruding as long as the absorbing amount, the upper and lower flanges 110 and 120 at both ends of the I-beam segment 100 are extended to use the large-diameter high-tensile bolt 310 of a large size in accordance with the transverse alignment of the bolt holes 140. Punched, but the high-strength steel 220 of the lower flange to be drilled in the same size at the position extended to the lower flange of the I-beam segment, but moved to the inner side of the central portion as much as the amount of sliding under the load load, the upper flange of the top flange The high-strength steel 210 is drilled in the same size at the position extended to the I-beam segment upper flange, but moved to the outside of the end portion by the amount of sliding during the load load, transverse direction Mudgee column is a non-perforated state.

3) Load by hydraulic jack and introduce prestress.

4) After the high-strength steel (210, 220) of the I-beam segment and the upper and lower flanges have been adjusted, the large diameter high-strength bolt (310) larger than the other holes in the bolt hole (130) is formed in the expanded hole (140). ) And insert it.

5) Four-side welding of the joint surface portions of the I beam segment 100 and the padded high strength steels 210 and 220 in the longitudinal and transverse directions.

6) After removing the load, the unperforated portions of the high strength steels 210 and 220, which are padded on the upper and lower flanges of the I beam segment, are drilled in accordance with the perforations of the bolt holes 130 of the I beam segment 100.

7) The fabrication of the pre-stressed I beam segment 100 is completed.

8) A steel I girder in which prestress is introduced is manufactured by connection assembly of the I-beam segment 100 in which prestress is introduced using a bolt hole 140 for I beam segment connection assembly.

Precise prestress introduction method using a bolt hole perforation for connecting I beam segment connection when the prestress is introduced by adding a high strength steel to the I beam segment according to the present invention consisting of the construction as described above, the I beam segment 100 and the high strength steel Instead of forming additional bolt holes 150 perforations for fixing 210 and 220, a portion 140 of the connection assembly bolt hole perforations for connection assembly of the I-beam segment 100 may be replaced with other bolt holes ( 130) Expanded and drilled somewhat larger than the perforated part, the high strength steel 220 of the lower flange is shifted to the inner side of the central portion as much as the amount of sliding, and the high strength steel 210 of the upper flange is padded as much as the amount of sliding under load High-strength steel of upper and lower flanges padded with I-beam segment 100 in the portion of the bolt hole 140, which is moved and drilled outward from the end. 0, 220 by adjusting the amount of sliding and fixed with a large diameter high-tensile bolt 310, by welding the four sides of the I-beam segment 100 and the padded high-strength steel (210, 220) in the longitudinal and transverse directions Since the amount of sliding between the I beam segment 100 and the padded high strength steels 210 and 220 can be naturally adjusted, the I beam segment 100 and the high strength steels 210 and 220 padded on the upper and lower flanges are completely completed. Precise and precise prestress can be introduced and all four sides of the I-beam segment 100 and the bonded high strength steels 210 and 220 are welded on four sides, preventing corrosion due to moisture penetration inside the joint surface. By drastically reducing the number of joints of 300), construction cost is reduced, aesthetics are improved, and maintenance is easy.

1 is a diagram illustrating a state in which a high-strength steel is bolted and bonded to a high-strength bolt to an I beam segment in a conventional technique.

FIG. 2 is an exemplary view showing a state in which a bolt is completely loaded with welding and high-tension bolts under load in FIG. 1;

3 is an exemplary view showing a state in which a load is removed in FIG. 2;

4 is a cross-sectional view taken along the line A-A of FIG.

5 is a cross-sectional view taken along the line B-B of FIG.

6 is a cross-sectional view taken along the line C-C of FIG.

7 is an exemplary view showing a state where a high-strength steel is padded on the upper and lower flanges of the I beam segment according to the present invention;

8 is an enlarged detailed view of a portion “A” of FIG. 7;

9 is an enlarged detailed view of a portion “B” of FIG. 7;

FIG. 10 is an exemplary view showing a state in which both beams are fixed to both upper and lower portions of the I beam segment and the upper and lower portions of the pad with high diameter high-strength bolts after welding, and welded between the I beam segment and the high-strength steel.

FIG. 11 is an enlarged detailed view of portion “C” of FIG. 10;

12 is an enlarged detailed view of a portion “D” of FIG. 10;

FIG. 13 is an exemplary view showing a state in which a large diameter high-tension bolt fixed at both ends is removed after removing a load from FIG. 10, and a non-perforated bolt hole of an upper and lower high strength steel is drilled in accordance with a drilling standard pre-punched on an upper and lower flange;

14 is an enlarged detailed view of a portion “E” of FIG. 12;

15 is an enlarged detailed view of a portion “F” of FIG. 12;

16 is a cross-sectional view taken along the line A-A of FIG.

17 is a cross-sectional view taken along the line B-B of FIG. 12;

18 is a cross-sectional view taken along the line C-C of FIG.

19 is a cross-sectional view taken along the line D-D in FIG.

Explanation of symbols on the main parts of the drawing

100: I beam segment 110: upper flange

120: lower flange 130: bolt hole

140: expanded perforated bolt hole

150: additional bolted joint for prestressing

210: high strength steel

220: lower high strength steel 300: high tension bolt

310: large diameter high-tensile bolt 400: welded portion

410: non-contact portion 500: buckling portion

600: uplift

Claims (6)

High-strength steel of the lower flange, which extends and drills the transverse end portions of the upper and lower flanges 110 and 120 at both ends of the bolt hole punching unit 130 for connecting and assembling the I-beam segment 100, 220 is a high-strength steel 210 of the upper flange is moved to the inner portion of the upper flange during the loading load, and the high-strength steel 210 of the upper flange is moved to the outer side of the end portion by the amount of the sliding load under the load load and the high strength steel ( 210, 220) and load the lower flange to adjust the amount of sliding between the I-beam segment and the high-strength steel (210, 220), and then insert and fix the large-diameter high-tension bolt in the expanded perforated bolt hole to fix the I-beam. After closely contacting the segment 100 and the padded high strength steels 210 and 220, the high strength steels 210 and 220 are welded to the I-beam segment 100. Precise prestress introduction method using bolt hole perforation for I beam segment connection assembly when high strength steel is added to I beam segment. The method of claim 1, When the prestress is introduced by adding a high strength steel to the I beam segment, the prestress is introduced by the electronic control system to introduce the prestress by the hydraulic jack for the load. Precise prestress introduction method using The method of claim 1, In the I-beam segment 100 into which the pre-stress for the constant moment section is introduced, a high-strength steel is applied only to the lower flange 120 of the I-beam segment 100 to adjust the I-beam segment to a high strength. Precise prestressing method using bolt hole perforation for I beam segment connection assembly when steel is pre-stressed. The method of claim 1, The high-strength steel (210, 220) is used for assembling the I-beam segment when the pre-stress is introduced by applying a high-strength steel to the I-beam segment, characterized in that any one of steel, I-beam, H-beam, L-shaped steel, c-shaped steel Precise prestressing method using bolt hole perforations. The method of claim 1, The welding of the I beam segment 100 and the high strength steels 210 and 220 is performed by welding four sides of the high strength steels 210 and 220 in the longitudinal direction and the transverse direction of the I beam segment 100. Precise prestressing method using bolt hole perforations for I-beam segment connection assembly when high-strength steel is added to the plate to introduce prestress. The method of claim 1, The high-strength steel is padded on the I-beam segment, and the high-strength steel attached to the upper flange protrudes both ends as much as the amount of jungle absorption, and the high-strength steel attached to the lower flange is padded by shortening both ends by the amount of jungle protrusion. Precise prestress introduction method using bolt hole perforations for I beam segment connection assembly when high stress steel is added to the I beam segment.

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