KR100707726B1 - Non-cable long span using bow principle and construction method - Google Patents

Abstract

        The present invention is to install a compression member between the lower part of the phase current and the cable after the extension and fixing the cable in a pair of fixing brackets installed on the lower side of both ends of the phase current which is a long span mounted on the point portion of the bridge and building Next, the compressive force applied to the cable is transferred to the upper chord by the compression member so that the compressive force capable of resisting the dead load and the live load acting on the present chord is introduced into the phase chord. Construction method of long span of cable (B-Cable).

Description

Non-cable long span using principle of a bow and constructing method

        1 is an overall view of a non-cable long span of the present invention.

        FIG. 2 is a detailed view of “section A” of FIG. 1.

        3 is a view showing that the length adjusting device is installed in the compression member of the present invention.

        4 shows a detail of “section B” of FIG. 1;

        FIG. 5 shows another embodiment of “section B” of FIG. 1 in detail;

        FIG. 6 shows moments acting on a non-cable long span of the present invention. FIG.

        <Description of the symbols for the main parts of the drawings>

          P: Tensile force P ': Compression force

          10: B-Cable long span 11: Phase present

          12: end 13: cable

          14 branch part (pillar) 15 Teflon sheet

          16: sleeve 17: steel connection

          18: fixing bracket 19: brace

          20: compression member

          30: length adjusting device

          40: end reinforcement

          50: cable extension

        The present invention relates to a structure of a long span that is installed in bridges and building structures, for example, as a bridge upper structure mounted on a point portion in a bridge, a cable to a pair of fixing brackets installed at the lower end of both side ends of a long span which is a long span. After the extension is installed, it is fixed to the fixing bracket, and a compression member is installed between the lower part of the phase chord and the cable, and the compressive force acting on the phase chord is transmitted to the phase chord by the compression member. Is a method of constructing a non-cable (span) long span to introduce a compressive force that can resist dead and live loads.

        The present invention by using the principle of the bow is connected to the bow bows on both sides of the support body of the bow, the bow is attached to the bow bows and then pull the bow bows when the tensile force applied to the bow bows are transferred to the bow support body that is the body of the bow This is to use the principle that the compression force is introduced into the.

         In other words, the present invention, the long span of the present invention serves as the support body which is the main body of the bow, the cable of the present invention serves as the bow demonstration, and the compression member of the present invention serves as the arrow, respectively, When the tensile force is introduced into the cable set at both ends of the phase chord, the compressive force is introduced into the compression member by the tensile force introduced into the cable, and the compression force introduced into the compression member is transferred to the phase chord, and the compression force is introduced into the phase chord. It is a principle of the present invention that the compressive force is continuously introduced into the phase current by the tensile force introduced into the cable, which can resist dead and live loads acting on the bridge.

        According to the principle described above, the height of the present beam can be made as low as possible, so that it can be applied to bridges and building structures where there is a restriction on the lower space of the present column. Therefore, the appearance is simple and sleek, so it can be applied to bridges, overpasses, bridges in parks, and architectural structures in urban areas.

        An object of the present invention is to install a factory-manufactured beam current in the branch portion, then fixedly install the cable in the lower portion and then introduce a tensile force to the cable to install the bridge and building structures by the compression member is introduced into the phase current by the compression member B-Cable, which has excellent workability and high durability of bridges and building structures, can be installed at a low construction cost, and can be easily repaired and repaired when the bridges and building structures become old. It is to provide a construction method for installing a long span.

        Conventionally, beams have been installed by installing beams at the point, but the deflection of the beam is severely progressed by repeated loads, which affects the safety of the bridges, resulting in excessive maintenance costs due to frequent maintenance to repair them. There was a problem such as a need, and there is a problem that the bridge can not be installed in the limited communication surface and the lower space of the bridge due to the constant height of the beam.

         The present invention is installed on the point portion installed on both sides with the beam of the upper structure of the bridge and the building structure as the upper chord, and then the cable is fixed to the lower end of the upper chord, and the tensile force is introduced into the cable to the upward by the compression member It is very easy to install bridges and building structures by introducing compressive force at the present time, and it is possible to install at low cost and high durability of bridges and building structures. To provide a beautiful B-Cable long span construction method that can be performed beautifully.

        According to the present invention, after the cable 13 is extended to a pair of fixing brackets 18 installed below both side ends of the upper chord 11, which are long spans, on the points of the bridge and the building structure, the fixing brackets 18 After fixing, the compression member 20 is installed between the lower portion of the phase current 11 and the cable 13, and the tension force P applied to the cable 13 is applied by the compression member 20 to the phase current ( 11) A non-cable (B-Cable) which allows the upward compressive force (P ') to be transmitted so that a compressive force capable of resisting dead and live loads acting on the phase current (11) is continuously introduced by the tension of the cable. There is a feature in the construction method of the long span 10.

        In addition, the bridge and the building structure is aging by using the cable installed in the lower phase as described above to reinforce the load capacity of the bridge and building structure or to raise the load bearing capacity of the bridge and building structure one step lower of the upper side By re-introducing the tensile force into the cable already installed in the cable, it is simply to increase the load capacity of bridges and building structures so that the desired purpose can be achieved.

        Hereinafter, the configuration and operation of the present invention will be described in detail by the accompanying drawings.

        1 is a view showing the overall non-cable (B-Cable) long span of the present invention,

        In order to structurally explain the long span of the present invention, a long span, which is a bridge beam of a bridge upper structure of a bridge, is described as an example. In addition, the long span of a visible structure of a building structure may be applied in the same structure as that applied to the bridge. Let's find out.

        A cable 13 is mounted on a pair of fixing brackets 18 mounted on the upper side beams 11, which are upper beams, as long spans on the branch portions 14 on both sides provided by columns or beams. After the extension is installed in the fixing bracket 18, the compression member 20 is installed between the lower portion of the upper chord (11) and the cable 13 and then the tension force (P) applied to the cable (13) ) Compressive force (P ') is transmitted to the upper chord 11 by the compression member 20 so that the compressive force is continuously compressed by the cable tension so as to resist dead and live loads acting on the upper chord (11) It is a non-cable (B-Cable) long span 10 to be introduced into the phase current through.

         In the non-cable (B-Cable) long span 10 of the present invention, when the tensile force P is introduced into the cable 13 fixed to both ends of the upper chord 11, the tensile force P introduced into the cable 13 is introduced. The compressive force P 'is introduced into the phase current through the compression member 20 through the compression member 20 so that the load capacity, which is a compressive force capable of resisting dead and live loads acting on the bridge, is applied to the tensile force of the cable to the phase current 11. It is a principle of the present invention to be continuously introduced through the compression member by.

        Sangsang 11 of the present invention is a beam made using a variety of materials, such as concrete, steel, wood, the material of the cable 13 also uses a variety of materials such as PC strands, wire rope, fiber cable, PWS.

       The supporting conditions of the point portion 14 may also be applied to all the conditions of various point portions, such as both ends of the pin, one end of the pin and the other end of the roller, fixed both ends.

        FIG. 2 is a view showing “section A” of FIG. 1 in detail, and relates to a method of installing the compression member 20 installed between the cable 13 and the lower portion of the upper chord 11.

        A lower portion of the upper chord 11 is formed by tightening one end of the compression member 20 and a rigid connection portion, and the other end of the compression member 20, that is, the portion of the pipe 13 which is in contact with the cable 13, has an inner sleeve 16. ) To be welded and installed so that the cable 13 penetrates into the through portion of the sleeve 16.

        This is to allow the upward compression force P 'to be introduced into the compression member 20 by the tensile force introduced while the tensile force P is smoothly introduced when the tension force P is applied to the cable 13 installed in the sleeve 16. .

        In order to smoothly introduce the tensile force (P) to the cable 13 as described above to apply a lubricant in the sleeve 16 or to install the teflon sheet 15 and the cable 13 is inserted between the cable 13 This is to reduce the coefficient of friction to the cable by the lubricating oil and the Teflon sheet when pulling to introduce the tensile force (P) to the same tension force to be introduced throughout the entire span of the cable while preventing the loss of tensile force introduced into the cable.

        As another method, the upper chord 11 and the compression member 20 may be hingedly connected, and the compression member 20 and the cable 13 may be fixed by a clamp (not shown).

        In the same manner as described above, one end is fixed, but the other end can be operated by a hinge so that the tensile force is smoothly transmitted to the compression member while being introduced into the entire cable.

        In addition, the installation position of the compression member installed between the upper chord and the cable can be installed in the central part of the upper chord or in a portion other than the central part, and the number of installation of the compression member is one between the current chord and the cable, or Install more than one, but install them in the center, or any part other than the center.

        The compression member may also be installed in various forms such as a V shape in addition to the straight form.

        3 is a view showing that the length adjusting device is installed in the compression member of the present invention, when the tension force (P) is introduced into the cable 13, the compression member 20 installed in contact with the cable 13 to the tension of the cable When the upward compression force (P ') is introduced by this, if the length of the compression member 20 is long, the tensile force of the cable is increased, and the upward compression force (P') is also introduced large, the length of the compression member 20 If it is relatively small, the magnitude of the upward compression force P 'is also introduced to be relatively small.

        In other words, the present invention uses the principle of the bow so that when the bow is pulled back more strongly in order to make the arrow fly more distantly, a stronger tension is introduced into the bow, so that the arrow is flying more strongly by the above tension. It's the same principle that makes it possible.

        Therefore, according to the magnitude of the load acting on the bridge and the building structure, by adjusting the length of the compression member 20 to determine the magnitude of the upward compression force (P ') introduced into the compression member 20 by the magnitude of the tensile force of the cable. To adjust.

        In order to adjust the length of the compression member 20, the length adjusting device 30 is to be installed at the center or end of the compression member 20.

        The length adjustment device 30 may use a device that can adjust the length, such as a turnbuckle (not shown) or a screw jack (not shown).

        FIG. 4 is a detailed view of the “section B” of FIG. 1. The end portion 12 is provided by installing a brace 19 at a predetermined position of an end portion of the point portion 14 and the upper chord 11 installed by a column or beam. To reinforce.

        The reinforcement of the end 12 and the point 14 of the upper chord 11 with the brace 19 is that the fixing bracket 18 attached to the lower part of the upper chord 11 is the end of the upper chord 11 ( 12) is to be installed in a fixed distance inside the installation to fix the cable 13,

        When the tension force P 'is introduced into the cable 13 fixed to the fixing bracket 18 installed inside the predetermined distance from the end 12 of the upper chord 11 to fix and fix the end 12 of the upper chord 11 ) In the upper chord 11 between the portion where the fixing bracket 18 is installed and the lower part of the column or beam and the post chord 11, which are the point portions 14, in order to prevent the stress from being concentrated. The brace 19 is installed to prevent the stress from being concentrated. As another method, the fixing bracket may be installed at the lower center of the upper chord, the cable may be fixed to the fixing bracket installed at the center, and then a tensile force may be introduced into the cable to allow the compressive force to be introduced into the upper chord.

        In addition to the method of installing the brace 19 as described above, the end reinforcing portion 40 is installed at the end chord 11 between the end 12 of the top chord 11 and the fixing bracket 18, and the end 12 is provided. Can also be used to reinforce strength.

        Even if the end reinforcement portion 40 is provided as described above, stress can be concentrated to prevent the phase current from breaking.

        FIG. 5 is a view showing another embodiment of “section B” of FIG. 1 in detail, in which the cable 13 is fixed by the fixing bracket 18 at the end 12 portion of the upper chord 11. Fixing and fixing the cable 13 to the end 12 of the upper chord 11 by the cable extension 50 extending the cable 13 from the fixing bracket 18 to the end 12 of the top chord 11. To do that.

        When the cable is fixedly fixed to the end 12 of the upper chord 11 by the cable extension 50 extending the cable 13 as described above, when the tension is introduced into the cable 13 and fixed. It is an advantage that it is easy to install a device that introduces a tensile force (P) when tensioning the cable 13, while preventing stress from concentrating on the end portion 12, thereby preventing the end portion from breaking. .

        6 is a view showing a moment acting on the non-bable long span of the present invention, Figure (a) is the same principle as the moment due to the load acting on the general bridge and building structure After 11) is mounted on both sides of the point portion 14, the load is applied to show the moment size of the hatched portion generated in the upper chord 11,

        FIG. 2 (b) shows an upward compression force P ′ transmitted to the compression member 20 by the tension force P introduced into the cable 13 installed at the lower portion of the upper chord 11 to the upper chord 11. To show the moment size by hatching

        Figure (c) is a composite of the moment generated in the above (a) and (b), and eventually the non-cable (span) (B-Cable) long span 10 of the present invention is installed of the hatched portion generated during use It shows the magnitude of the moment.

        Therefore, as shown in (c), the magnitude of the moment generated in the upper chord 11 is greatly reduced, so that the floor height of the upper chord 11 can be designed more effectively, and thus the weight can be reduced. And it shows that the construction can be applied to the building structure with a economical and beautiful appearance.

        The present invention is installed in the beam to the upper part of the point and then fixedly installed in the lower cable, by introducing a tensile force to the cable so that the compressive force is introduced into the upper current by the compression member to install the bridge and building structure is very excellent It can be installed with high durability and low construction cost, and it can be easily repaired when bridges and building structures are aged. It is

Claims (13)

An upper chord which is a long span mounted on a point portion of both sides installed by a column or a beam, and a pair of fixing brackets installed at the lower end of both side ends of the upper chord by connecting and fixing cables, between the lower chord and the cable In the non-cable (long) span of the compression member installed in the and the non-cable long-span is introduced so that the upward compression force is transmitted to the upper chord by the compression member by introducing the tensile force to the cable to introduce a load-bearing force of the compressive force to the upper chord ,      The compression member is a non-cable long span using the principle of the bow characterized in that the upper chord and the compression member is connected to the hinge, the compression member and the cable is fixed by the clamp. delete delete delete delete delete         The method of claim 1,         The fixing position of the fixing bracket installed on the lower part of the upper chord is installed at a portion within a certain distance from the upper end of the upper chord and is fixed to the cable to fix the brace between the end of the upper chord and the column or beam which is the branch part. B-Cable long span using the principle of the bow characterized by the reinforcement of the ends. delete         The method of claim 1,         The cable is to be fixed by the fixing bracket at the end portion of the top chord, and the cable is fixed to the end of the top chord by a cable extension that extends the cable from the fixing bracket to the end of the top chord. B-Cable long span using bow principle. delete delete delete delete

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