Two-sided tensile control type Kentilever extension bridge that reduces walking vibration and sagging, and its construction method

Abstract

The present invention relates to a cantilever-type extended pedestrian bridge installed by attaching it to the side of a bridge, retaining wall, or existing road structure, and a method of constructing the same. It relates to a double-sided tension-controlled cantilever extended pedestrian bridge that reduces pedestrian vibration and deflection by combining a tension member, an elastic member, and a tension control device to effectively reduce vibration, deflection, and torsion caused by pedestrian loads, and a method of constructing the same. The double-sided tension-controlled cantilevered pedestrian bridge of the present invention is a cantilevered pedestrian bridge installed by attaching it to the side of an existing bridge, retaining wall, or road structure, comprising: a steel bracket formed by extending outwardly with one side supported by the existing structure; a floor plate installed on the upper part of the steel bracket to form a pedestrian walkway; tension members respectively disposed on the left and right sides of the steel bracket; an elastic member connected to the tension members to absorb fluctuations in tension force; and a tension control unit for controlling the tension of the tension members, wherein the tension members are symmetrically disposed on the left and right sides of the steel bracket, thereby reducing sagging and twisting of the steel bracket due to pedestrian load, and the elastic member elastically absorbs fluctuations in tension due to pedestrian load to reduce pedestrian vibration.

Description

Technology Field

[0001] The present invention relates to a cantilever-type extended pedestrian bridge installed by attaching it to the side of a bridge, retaining wall, or existing road structure, and a method of constructing the same. More specifically, it relates to a double-sided tension-controlled cantilever extended pedestrian bridge that reduces pedestrian vibration and sagging by combining a tension member, an elastic member, and a tension control device to effectively reduce vibration, sagging, and torsion caused by pedestrian loads, and a method of constructing the same. Background Technology

[0003] Generally, in narrow sections of bridges or roads, cantilevered extension walkways are installed on the sides of existing structures to ensure pedestrian safety. However, due to their structural characteristics, these conventional cantilevered extension walkways have the following problems.

[0004] 1) The problem of vertical vibration and swaying occurring at the tip of the cantilever due to walking loads, causing psychological anxiety and perceived discomfort to pedestrians

[0005] 2) The problem of twisting occurring throughout the entire structure due to eccentric loading when pedestrians walk leaning to one side.

[0006] 3) Problems where performance degradation occurs due to tension reduction, tension deviation, and difficulties in maintenance, even when a tensile reinforcement structure is applied.

[0007] 4) The problem that sagging and tilting occur due to on-site construction errors or deformation caused by long-term use, and that subsequent adjustment is difficult.

[0008] Due to these issues, conventional extended sidewalks, even if they satisfy static strength requirements, fail to provide sufficient satisfaction in terms of safety and usability (serviceability) as actually perceived by pedestrians. Prior art literature

[0010] Republic of Korea Registered Patent No. 10-2216347 (Registration Date: February 9, 2021) Republic of Korea Registered Patent No. 10-2560129 (Registration Date: July 21, 2023) The problem to be solved

[0011] The present invention was devised to solve the problems of the prior art as described above, and aims to provide a double-sided tension-controlled cantilevered pedestrian bridge that reduces walking vibration and sagging, and a method for constructing the same.

[0012] In addition, another objective of the present invention is to provide a double-sided tension-controlled cantilevered pedestrian bridge and a method for constructing the same, which can effectively reduce vibration, sagging, and twisting caused by pedestrian loads acting on the cantilevered pedestrian bridge, thereby significantly improving not only static strength but also the stability perceived by pedestrians.

[0013] In addition, another objective of the present invention is to provide a double-sided tension-controlled cantilevered pedestrian bridge and a method for constructing the same, which has excellent maintainability as the tension force can be readjusted even after construction.

[0014] In addition, another objective of the present invention is to provide a double-sided tension-controlled cantilevered pedestrian bridge and a method for constructing the same, wherein elastic members are arranged in the axial direction of tension members positioned on the left and right sides of the cantilever, respectively, to absorb energy through axial elastic deformation when the tensile force increases due to walking load, and are connected in series with the tension members to be elastically deformed in proportion to the fluctuation in tension.

[0015] In addition, another objective of the present invention is to provide a double-sided tension-controlled cantilevered pedestrian bridge and a method for constructing the same, which is configured to allow tension to be independently adjusted through left and right tension members, and to allow mutually different tension changes when eccentricity of walking load occurs, thereby suppressing torsional deformation of the cantilever.

[0016] In addition, another objective of the present invention is to provide a double-sided tension-controlled cantilevered pedestrian bridge and a method for constructing the same, which introduces initial tension into a tension member using a tension control unit that controls the tension of a tension member, and corrects the sagging and twisting of the cantilever by comparing and adjusting the tension of the left and right tension members.

[0017] In addition, another objective of the present invention is to provide a double-sided tension-controlled cantilevered pedestrian bridge and a method for constructing the same, which is configured to reduce vibration and sagging by performing deformation and restoration behaviors in conjunction with each other when a walking load is applied through a cantilever, a tension member, an elastic member, and a tension control unit.

[0018] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0020] As a means for solving the aforementioned technical problem, the double-sided tension-controlled cantilevered pedestrian bridge according to the present invention comprises, in a cantilevered pedestrian bridge installed by attaching it to the side of an existing bridge, retaining wall, or road structure, a steel bracket having one end fixed to the existing structure and extending outwardly; a floor plate installed on the upper part of the steel bracket; a pair of tension members respectively disposed on the left and right sides of the steel bracket; and an elastic member disposed in the axial direction of each tension member and connected in series with the tension members. The device is characterized by including a pair of tension control units that independently adjust the tension of the left tension member and the right tension member, wherein the left tension member and the right tension member are each connected to the independent tension control units so that different initial tensions can be set, the elastic member is configured to allow axial elastic deformation when the tension force increases due to walking load, the left tension member and the right tension member are configured to cause different tension changes when the walking load acts eccentrically, and the horizontality or deflection of the steel bracket can be adjusted by the difference in tension between the left tension member and the right tension member, and the tension control units are positioned so that they can be accessed from the outside even after construction, thereby allowing the tension of the left tension member and the right tension member to be readjusted respectively.

[0021] The above tension member is characterized by being formed of PC steel wire.

[0022] The above elastic member is formed as a spring to cushion the instantaneous increase in tension due to walking load, is arranged in the axial direction of the tension member to absorb energy through axial elastic deformation when the tensile force due to walking load increases, and is characterized by having an elastic modulus set to dampen vibration components occurring within the walking cycle range of a pedestrian.

[0023] The tension adjustment unit is formed with a turnbuckle and is positioned so as to be accessible from the outside even after construction is completed, and is configured to allow readjustment of tension according to changes in sagging or vibration occurring during use, and is characterized by including a screw coupling structure for precise tension adjustment.

[0024] The above-described left and right tension members are configured to allow for independent tension adjustment, and each includes an independent tension adjustment unit to allow for individual setting of left and right tensions, and are configured to allow mutually different tension changes when eccentricity of walking load occurs, thereby suppressing torsional deformation of the steel bracket.

[0025] The above-described double-sided tension-controlled cantilevered pedestrian bridge may be constructed to include a square steel tube installed between the steel bracket and the floor plate.

[0026] The above steel bracket is characterized by having a lower portion formed at an angle.

[0027] The above steel bracket, tension member, elastic member, and tension control unit are characterized by being configured to reduce vibration and deflection by interlocking with each other to perform deformation and restoration behavior when a walking load is applied.

[0028] As a means to solve the aforementioned technical problem, a construction method for a double-sided tension-controlled cantilevered pedestrian bridge according to the present invention comprises: a step of fixing and installing a steel bracket on an existing bridge, retaining wall, or road structure using anchor bolts; a step of installing tension members on the left and right sides of the steel bracket, respectively; a step of combining an elastic member and a tension adjustment unit with the tension members; a step of introducing initial tension to the left tension member and the right tension member, respectively, using the tension adjustment unit; a step of correcting the deflection of the steel bracket by individually comparing and adjusting the tension of the left tension member and the right tension member; and a step of adjusting the horizontality of the pedestrian deck and the amount of deflection of the steel bracket by setting the tension of the left tension member and the right tension member differently from each other. and a step of setting tension to suppress torsional deformation of the steel bracket by adjusting the tension difference between the left tension member and the right tension member; characterized by including. The construction method of the double-sided tension-controlled cantilever extended pedestrian bridge further includes, after the step of setting tension to suppress torsional deformation of the steel bracket by adjusting the tension difference between the left tension member and the right tension member, a step of checking the vibration state by applying a pedestrian load, and readjusting the tension of the left tension member and the right tension member using the tension adjustment unit according to the confirmed vibration state. The tension readjustment step is characterized by including a step of readjusting the horizontality of the pedestrian deck and the deflection amount of the steel bracket by setting the tension of the left tension member and the right tension member differently from each other. The construction method of the double-sided tension-controlled cantilever extended pedestrian bridge further includes, after the step of readjusting the horizontality and deflection amount, repeatedly applying a pedestrian load to check the vibration response, and according to the confirmed vibration response, the tension adjustment unit It is characterized by further including a step of finely adjusting the tension of the left tension member and the right tension member using this method.

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[0032] delete Effects of the invention

[0033] According to the present invention, the following effects can be obtained.

[0034] 1) Deflection of the cantilever tip is significantly reduced by tension members on both sides.

[0035] 2) Walking vibrations are reduced through the cushioning action of springs, improving perceived stability.

[0036] 3) Torsion under eccentric load is effectively suppressed due to the left-right symmetrical tensile structure.

[0037] 4) Tension can be readjusted via turnbuckles, making it easy to correct construction errors and long-term deformation.

[0038] 5) Excellent maintainability allows for stable performance over a long period.

[0039] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below. Brief explanation of the drawing

[0041] FIG. 1 is a side view of a double-sided tension-controlled cantilevered extension pedestrian bridge according to one embodiment of the present invention. Figures 2 and 3 are detailed configuration diagrams of a double-sided tension-controlled cantilevered pedestrian bridge. FIG. 4 is a drawing illustrating the front view and connection structure of a double-sided tension-controlled cantilevered extension pedestrian bridge according to one embodiment of the present invention. Figure 5 is a schematic diagram showing an example of a deck fixing member. FIG. 6 is a construction flowchart showing a construction method for a double-sided tension-controlled cantilevered pedestrian bridge according to one embodiment of the present invention. Specific details for implementing the invention

[0042] Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the invention in the drawings, parts unrelated to the description have been omitted, and similar parts throughout the entire description of the invention are described using similar reference numerals.

[0043] Meanwhile, the terms used in this invention have been selected to be as widely used as possible, taking into account their functions within the invention; however, these terms may vary depending on the intent of those skilled in the art, case law, the emergence of new technologies, etc. Additionally, in specific cases, terms have been arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in this invention should be defined not merely by their names, but based on their meanings and the overall content of the invention.

[0044] Furthermore, when a part of the specification is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude the following component but may include additional components.

[0045] Hereinafter, specific technical details to be implemented in the present invention will be described in detail with reference to the attached drawings.

[0047] Example of a double-sided tension-controlled cantilevered extended pedestrian bridge

[0048] FIG. 1 is a side view of a double-sided tension-controlled cantilevered pedestrian bridge according to an embodiment of the present invention, and FIG. 2 and FIG. 3 are detailed views of a double-sided tension-controlled cantilevered pedestrian bridge. FIG. 4 is a drawing showing the front view and connection structure of a double-sided tension-controlled cantilevered pedestrian bridge according to an embodiment of the present invention.

[0049] A double-sided tension-controlled cantilevered pedestrian bridge (100) according to one embodiment of the present invention may be configured to include a steel bracket (110), an elastic member (130), a tension control unit (150), a tension member (160), a steel wire guide (170), a fixing ring (180), an anchor bolt (190), a square steel pipe (200), a deck fixing member (not shown), a deck floor plate (220), and a handrail foundation frame (230), as shown in FIGS. 1 to 4.

[0050] In the above cantilevered pedestrian bridge (100), the cantilever is a pedestrian deck structure that pedestrians can walk directly on, and is a main structural part that protrudes outward from the existing bridge and retaining wall and undergoes sagging, vibration, and twisting due to pedestrian load.

[0051] The above cantilever may be composed of the above steel bracket (110), and is a structure in which one side is supported and extended outwardly.

[0052] The above steel bracket (110) is a walking deck structure in which one side is supported on the wall of the structure and the other side forms a free end, causing bending, sagging, and vibration due to walking load. The above steel bracket (110) is a horizontal structure that includes the entire frame structure including the deck floor plate (220) and the square steel tube (200), and is a structure that pedestrians can step onto.

[0053] The above steel bracket (110) corresponds to a cantilever and is a steel support member that is fixed to an existing structure to support and transmit loads, and serves to hold an existing bridge or retaining wall with one side fixed.

[0054] The steel bracket (110) can be fixedly installed on an existing structure, including the side of a bridge, retaining wall, or road structure, by means of the anchor bolt (190). The lower end of the steel bracket (110) may be formed at an angle.

[0055] The above steel bracket (110) is a main structural part that is deformed by walking load and is a supporting structural part that transmits load by fixing it to an existing structure. The above steel bracket (110) has a technical feature of reducing cantilever sagging and vibration through a tension control structure.

[0056] The above steel bracket (110) may have PC steel wires installed as tension members (160) on the left and right sides, respectively.

[0057] One end of the tension member (160) may be connected and fixed to the fixing ring (180) installed on the steel bracket (110), and the other end may be connected and fixed to the connecting ring (151) of the tension adjustment unit (150). The tension member (160) is supported by the steel wire guides (170) installed on the left and right sides, respectively, of the steel bracket (110). The steel wire guides (170) are arranged at intervals along the tension member (160) and consist of multiple guides, serving to support the tension member (160).

[0058] The left and right tension members (160) may each be configured to allow for independent tension adjustment. For example, the left and right tension members (160) may each include an independent tension adjustment unit (150) to allow for individual setting of left and right tensions. Accordingly, this configuration allows for mutually different tension changes when eccentricity of the walking load occurs, thereby suppressing torsional deformation of the steel bracket (110).

[0059] The tension adjustment part (150) above may be configured in the form of a turnbuckle to adjust the tension of the tension member (160).

[0060] The above turnbuckle is a mechanical element for finely adjusting the tension of the above tension member (160), and when the central body is rotated, the left and right screw threads operate simultaneously to increase or decrease the length.

[0061] The tension adjustment unit (150) is composed of a body with left and right screw threads machined inside a central rotating part, and left and right fixing rings (151, 152) fastened to the left and right screw threads, wherein the tension member (160) is connected and fixed to the left fixing ring (151), and the connecting ring (143) of the elastic member (130) is connected and fixed to the right fixing ring (152).

[0062] The tension adjustment unit (150) is positioned so that it can be accessed from the outside even after construction is completed, and is configured to allow the tension to be readjusted according to changes in sagging or vibration that occur during use, and includes a screw coupling structure for precise tension adjustment.

[0063] One side of the connecting ring (143) is formed in a ring shape, and the other side is fixedly formed on a movable plate (141) that is movably disposed inside a cylindrical body (140). A fixing plate (142) is fixedly formed at the entrance of one side of the cylindrical body (140), and the elastic member (130) is disposed between the fixing plate (142) and the movable plate (141) disposed inside. At this time, the connecting ring (143), with the other side fixed to the movable plate (141), is formed so that the ring shape on one side protrudes outward through a hole formed in the fixing plate (142). Here, the fixing plate (142) can be fixedly installed on the steel bracket (110) by welding.

[0064] The above elastic member (130) is formed as a spring and serves to cushion the instantaneous increase in tension due to walking load.

[0065] The elastic member (130) may be configured to be positioned in the axial direction of the tension member (160) to absorb energy through axial elastic deformation when the tensile force increases due to walking load. The elastic member (130) is connected in series with the tension member (160) and undergoes elastic deformation in proportion to the tension fluctuation, thereby absorbing the tension fluctuation due to walking load.

[0066] The above elastic member (130) may be configured with an elastic modulus set to dampen vibration components occurring within the walking cycle range of a pedestrian.

[0067] The above tension member (160) is symmetrically positioned on the left and right sides of the steel bracket (110) to effectively suppress sagging and twisting caused by the eccentric load of a pedestrian. In addition, the above elastic member (130) performs the role of reducing vibrations that occur during walking by elastically absorbing instantaneous tension fluctuations due to walking load.

[0068] The steel bracket (110), the tension member (160), the elastic member (130), and the tension adjustment part (150) are configured to reduce vibration and sagging by interlocking with each other to perform deformation and restoration behavior when a walking load is applied.

[0069] Furthermore, the upper part of the above steel bracket (110) may be configured to include a square steel pipe (200), a deck fixing member (not shown), a deck floor plate (220), and a railing foundation frame (230). At this time, the railing foundation (230) may have a railing (240) additionally installed on its upper part, or it may be configured without a railing (240).

[0070] The above square steel tube (200) is installed parallel to the top of the bracket at a predetermined interval in a direction perpendicular to it and can be composed of a square tube.

[0071] The above-mentioned square steel pipe (200) may have a joist extension connection (not shown) formed at one end separated to be fitted together in the middle. By configuring the joist extension connection to connect the two separated square steel pipes (200) to each other by fitting, it is possible to extend and adjust the length in the longitudinal direction.

[0072] The above deck fixing member may be configured in the form of a clip having a wing shape at the top. It may be formed to fix the deck bottom plate (220) by inserting the wing into insertion grooves formed on both sides of the deck bottom plate (220).

[0073] The above deck fixing member is for fixing the deck floor plate (220) installed on the above square steel pipe (200) and can be configured in various shapes and forms.

[0074] For reference, FIG. 5 is a cross-sectional view showing an example of a deck fixing member, wherein the deck fixing member (210) is fixedly installed on the upper part of the square steel pipe (200) with a fastening screw (211) and can be formed to fix the deck floor plate (220) by fitting a wing portion into the insertion groove of the deck floor plate (220).

[0075] The above steel bracket (110) may have the above railing foundation frame (230) installed on one side of the upper part.

[0076] The above railing foundation frame (230) is formed in the shape of a rectangular tube and has a space formed inside. The above railing foundation frame (230) can be configured to be positioned with a predetermined gap between the deck floor plate (220) and the railing foundation frame (230) to prevent lifting caused by expansion and contraction of the deck floor plate (220), thereby enabling a gap to be secured.

[0077] According to one embodiment of the present invention, a double-sided tension-controlled cantilevered pedestrian bridge (100) has a steel bracket (110) fixed to an existing structure that extends outwardly to form a cantilever structure.

[0078] A deck floor plate (220) is installed on the upper part of the above steel bracket (110) at predetermined intervals on the upper part of the square steel pipe (200) to form a walkway.

[0079] Tension members (160) are positioned on the left and right sides of the steel bracket (110), respectively. One end of each of the tension members (160) on the left and right sides is fixed to the steel bracket (110) or an existing structure, and the other end is connected to the steel bracket (110), and an elastic member (130) and a tension adjustment part (150) are sequentially connected between them.

[0080] When a pedestrian passes over the walking deck, the steel bracket (110) undergoes a slight downward deformation, which increases the tension of the tension member (160). At this time, the elastic member (130) elastically absorbs a portion of the increased tension to mitigate vibration energy and reduce the swaying felt by the pedestrian.

[0081] In addition, since the tension of the left and right tension members (160) can be individually adjusted through the tension adjustment unit (150), twisting caused by the eccentricity of the walking load or sagging caused by construction errors can be precisely corrected.

[0083] Example of construction method

[0084] FIG. 6 is a construction flowchart showing a construction method for a double-sided tension-controlled cantilevered pedestrian bridge according to one embodiment of the present invention.

[0085] First, a steel bracket (110) is fixedly installed on an existing bridge or retaining wall using an anchor bolt (190) (step S10). It is preferable that the lower end of the steel bracket (110) be formed at an angle.

[0086] Next, tension members (160) are installed on the left and right sides of the steel bracket (110) (step S20). Here, the tension members (160) may be formed from PC steel wire.

[0087] The above left and right tension members (160) are each configured to allow independent tension adjustment, and each may be configured to include an independent tension adjustment unit to allow the left and right tensions to be set individually.

[0088] The above left and right tension members (160) are configured to allow mutually different tension changes when eccentricity of the walking load occurs, thereby serving to suppress torsional deformation of the steel bracket (110).

[0089] Next, the elastic member (130) and the tension adjustment member (150) are combined with the tension member (160) (step S30).

[0090] Here, the elastic member (130) is formed as a spring to cushion the instantaneous increase in tension due to walking load, and may be configured to be positioned in the axial direction of the tension member to absorb energy through axial elastic deformation when the tensile force increases due to walking load. Additionally, the elastic modulus may be set to dampen vibration components occurring within the walking cycle range of the pedestrian.

[0091] The tension adjustment unit (150) is formed with a turnbuckle and is positioned so that it can be accessed from the outside even after construction is completed, and is configured to allow the tension to be readjusted according to changes in sagging or vibration that occur during use, and can be formed with a screw coupling structure for precise tension adjustment.

[0092] Next, an initial tension is introduced to the tension member (160) using the tension adjustment unit (150) (step S40).

[0093] Next, the tension of the left and right tension members (160) is compared and adjusted to correct the sagging and twisting of the steel bracket (110) (step S50).

[0094] Next, apply a walking load to check the vibration state and readjust the tension if necessary.

[0095] A construction method for a double-sided tension-controlled cantilevered pedestrian bridge according to one embodiment of the present invention may further include a step of correcting the horizontality of the pedestrian deck by setting the tension of the left and right tension members differently.

[0096] In addition, it may be configured to further include a step of fine-tuning the tension using the tension adjustment unit after verifying the vibration response by repeatedly applying a walking load.

[0097] The steel bracket (110), the tension member (160), the elastic member (130), and the tension adjustment part (150) can reduce vibration and sagging by interlocking with each other to perform deformation and restoration behavior when a walking load is applied.

[0098] As described above, the double-sided tension-controlled cantilevered pedestrian bridge and the construction method thereof according to the present invention can solve technical problems by combining a tension member, an elastic member, and a tension control device to effectively reduce vibration, sagging, and twisting caused by pedestrian loads.

[0099] The preferred embodiments of the present invention described above are disclosed to solve technical problems, and a person with ordinary knowledge in the technical field to which the present invention belongs (a person skilled in the art) may make various modifications, changes, and additions within the spirit and scope of the present invention, and such modifications and changes should be considered to fall within the scope of the following claims. Explanation of the symbols

[0101] 100 : Double-sided tension-controlled cantilevered extended pedestrian bridge 110: Steel bracket 120: Side plate 130 : Elastic member (cushioning and tension-reinforcing spring) 140 : Cylindrical body 141 : Moving plate 142 : Fixing plate 143 : Connecting hook 150: Tension adjustment part (turn buckle) 151, 152: Left and right connecting links 160 : Tension member (PC steel wire) 170 : Steel wire guide 180 : Fixing ring 190 : Anchor bolt 200 : Square steel pipe 210 : Deck fixing member 220 : Deck floor slab 230 : Handrail foundation frame 240 : Handrail

Claims

Claim 1 A cantilevered pedestrian bridge installed by attaching it to the side of an existing bridge, retaining wall, or road structure, comprising: a steel bracket having one end fixed to the existing structure and extending outwardly; a floor plate installed on the upper part of the steel bracket; a pair of tension members respectively positioned on the left and right sides of the steel bracket; and an elastic member positioned in the axial direction of each tension member and connected in series with the tension members. A bilateral tension-controlled cantilevered pedestrian bridge comprising a pair of tension control units that independently adjust the tension of the left tension member and the right tension member, wherein the left tension member and the right tension member are each connected to the independent tension control units and configured to allow different initial tensions to be set, wherein the elastic member is configured to allow axial elastic deformation when the tension force increases due to walking load, wherein the left tension member and the right tension member are configured to cause different tension changes when the walking load acts eccentrically, wherein the horizontality or deflection of the steel bracket can be adjusted by the difference in tension between the left tension member and the right tension member, and wherein the tension control units are positioned to be accessible from the outside even after construction, thereby allowing the tension of the left tension member and the right tension member to be readjusted. Claim 2 A double-sided tension-controlled cantilevered pedestrian bridge according to claim 1, wherein the tension member is formed of a PC steel wire, the elastic member is formed of a spring to cushion the instantaneous increase in tension due to walking load, is arranged in the axial direction of the tension member to absorb energy through axial elastic deformation when the tensile force due to walking load increases, and has an elastic modulus set to dampen vibration components occurring within the walking cycle range of a pedestrian. Claim 3 A double-sided tension-controlled cantilevered pedestrian bridge according to claim 1, wherein the tension adjustment unit is formed as a turnbuckle and arranged to be accessible from the outside even after construction is completed, configured to allow readjustment of tension according to changes in sagging or vibration occurring during use, and includes a screw coupling structure for precise tension adjustment. Claim 4 A bilateral tension-controlled cantilevered pedestrian bridge according to claim 1, wherein the left and right tension members are each configured to allow tension to be adjusted independently, each includes an independent tension adjustment unit to allow the left and right tensions to be set individually, and is configured to allow mutually different tension changes when eccentricity of the walking load occurs, thereby suppressing torsional deformation of the steel bracket. Claim 5 A double-sided tension-controlled cantilevered pedestrian bridge according to claim 1, wherein the double-sided tension-controlled cantilevered pedestrian bridge comprises a square steel tube installed between the steel bracket and the floor plate, and the steel bracket is characterized in that its lower end is formed at an angle. Claim 6 A double-sided tension-controlled cantilevered pedestrian bridge according to claim 1, characterized in that the steel bracket, tension member, elastic member, and tension control member are configured to reduce vibration and deflection by performing deformation and restoration behavior in conjunction with each other when a walking load is applied. Claim 7 A method for constructing a double-sided tension-controlled cantilevered pedestrian bridge, comprising: a step of fixing and installing a steel bracket to an existing bridge, retaining wall, or road structure using anchor bolts; a step of installing tension members on the left and right sides of the steel bracket, respectively; a step of combining an elastic member and a tension adjustment unit with the tension members; a step of introducing initial tension to the left tension member and the right tension member, respectively, using the tension adjustment unit; a step of individually comparing and adjusting the tension of the left tension member and the right tension member to correct the deflection of the steel bracket; a step of adjusting the horizontality of the pedestrian deck and the amount of deflection of the steel bracket by setting the tension of the left tension member and the right tension member differently from each other; and a step of setting the tension to suppress torsional deformation of the steel bracket by adjusting the tension difference between the left tension member and the right tension member. Claim 8 The construction method of the double-sided tension-controlled cantilevered pedestrian bridge according to claim 7 further comprises the step of, after setting tension to suppress torsional deformation of the steel bracket by adjusting the tension difference between the left tension member and the right tension member, applying a pedestrian load to check the vibration state, and readjusting the tension of the left tension member and the right tension member using the tension adjustment unit according to the checked vibration state. Claim 9 A method for constructing a double-sided tension-controlled cantilevered pedestrian bridge, wherein, in claim 8, the tension readjustment step comprises the step of readjusting the horizontality of the pedestrian deck and the amount of deflection of the steel bracket by setting the tension of the left tension member and the right tension member differently from each other. Claim 10 The construction method of the double-sided tension-controlled cantilevered pedestrian bridge according to claim 9 further comprises, after the step of readjusting the horizontality and deflection amount, the step of repeatedly applying a walking load to check the vibration response, and finely adjusting the tension of the left tension member and the right tension member using the tension adjustment unit according to the confirmed vibration response.

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