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1. 发明专利

JP2000170121A BRIDGE 失效
公开(公告)号：JP2000170121A
公开(公告)日：2000-06-20
申请号：JP34697698
申请日：1998-12-07
申请人： NIPPON KOKAN KK
发明人： SATO TAKESHI
IPC分类号： E01D19/04
摘要： PROBLEM TO BE SOLVED: To provide a bridge having a knock-off structure for absorbing earthquake energy during an earthquake and maintaining the safety of a running vehicle. SOLUTION: A knock-off device is arranged on an expansion spacing between bridge girders 1, 1 or between the bridge girder 1 and an abutment. The knock- off device is provided with an impact absorption body 3a arranged on the lower end of the expansion spacing and comprising a substance for absorbing earthquake energy to be deformed or pressed and broken, and an interval adjustment member 2a arranged so as to be fallen downward when the impact absorption body 3a absorbs the earthquake energy to be deformed or pressed and broken and covering the upper part of the expansion spacing.

2. 发明专利

JPH11264114A IMPROVING METHOD OF TORSIONAL ATTENUATION OF SUSPENSION BRIDGE AND SUSPENSION BRIDGE 失效
公开(公告)号：JPH11264114A
公开(公告)日：1999-09-28
申请号：JP8506898
申请日：1998-03-17
申请人： NIPPON KOKAN KK
发明人： KATO SHINJI , MURAKAMI TAKUYA , SATO TAKESHI
IPC分类号： E01D11/00 , E01D11/02 , E01D19/16 , E01D101/00
摘要： PROBLEM TO BE SOLVED: To provide an improving method of torsional attenuation of suspension bridge and a suspension bridge capable of being installed in a state to directly contact to a bridge girder without requiring many days and much expenses for experiments at a low cost without requiring any maintenance inspection. SOLUTION: This suspension bridge is constituted of two cables 1, two main towers 4, hangers 2 suspended from the cables 1 and a bridge girder 3 hung to the hangers 2. Both ends of the cables 1 are fixed to anchor sections 5, and the suspension bridge is such a structure as the tensile force of the cables 2 is transferred to the main towers 4 and anchor sections 5. The bridge girder 3 is divided into a plurality of bridge girder blocks 3a having a proper length in the direction of the bridge axis. The adjoining bridge girder blocks 3a are connected to each other with shear type dampers 6. High damping rubber is used for the shear type dampers 6.

3. 发明专利

JPH1113014A METHOD AND STRUCTURE FOR ADDING WEIGHT TO SUSPENSION BRIDGE 失效
公开(公告)号：JPH1113014A
公开(公告)日：1999-01-19
申请号：JP18465697
申请日：1997-06-26
申请人： NIPPON KOKAN KK
发明人： MURAKAMI TAKUYA , SATO TAKESHI
IPC分类号： E01D1/00 , E01D11/00 , E01D11/02
摘要： PROBLEM TO BE SOLVED: To provide a method and a structure for adding a weight of a suspension bridge in which adding equipment and structure can be dispensed with, and a weight can be added to the suspension bridge by a simple operation. SOLUTION: Trusses 2a, 2b, 2c, 2d, 2e are formed of tubular members. In the upper trusses 2a, 2b and the lower trusses 2c, 2d, a plurality of tubular members are connected to each other in the bridge axial direction and communicated with each other. One end thereof is connected to a water feed means. A water draining valve is provided on each end. In addition, an air vent valve 5a is provided in the center (at the highest position) of the upper trusses 2a, 2b in the bridge axial direction.

4. 发明专利

JPH10184778A ACTIVE DAMPING METHOD AND DEVICE THEREOF 失效
公开(公告)号：JPH10184778A
公开(公告)日：1998-07-14
申请号：JP34360496
申请日：1996-12-24
申请人： NIPPON KOKAN KK
发明人： TSUMURA NAOYOSHI , SATO TAKESHI , MIZUNO HIROSHI , IIJIMA KEIJI
IPC分类号： E04H9/02 , F16F15/02 , G05D19/02
摘要： PROBLEM TO BE SOLVED: To improve the stability of a control system and conduct direct velocity feedback control (DVFB control) with a low-priced damping device by permitting damping force against bending vibration and a damping moment against torsional vibration to be set independent respectively. SOLUTION: A pair of pressurizing devices 1, 1a and a pair of speed sensors 2, 2a are disposed on a vibrating body which generates bending vibration and torsional vibration, in parallel to such a direction which generates displacement with the bending vibration and symmetrically to a reference surface 4 including the center line of the torsional vibration. Control signals are produced by adding and subtracting a bending signal 13 which is produced, after the output of the speed sensor is added with an adder 7, by multiplying it by a gain GB and a torsional signal 14 which is produced, after the output of the speed sensor is subtracted by a subtracter 10, by multiplying it by a gain GT respectively again with an adder 9 and a subtracter 12, and are then fed back to the pressurizing devices corresponding to each other.

5. 发明专利

JP2000064221A STRUCTURE, CONTROL DEVICE AND CONTROL METHOD 失效
公开(公告)号：JP2000064221A
公开(公告)日：2000-02-29
申请号：JP25035098
申请日：1998-08-21
申请人： NIPPON KOKAN KK
发明人： SATO TAKESHI
IPC分类号： E01D1/00 , E01D2/00 , E01D101/00
摘要： PROBLEM TO BE SOLVED: To provide a structure, a control device and a control method capable of easily controlling a flap. SOLUTION: A bridge girder 1 has an axially rotatable flap 2 laterally provided along a bridge axial direction, a control device for controlling the inclination angle of the flap 2, and a flap drive device 23 (drive means) for driving the flap 2 on the basis of a control signal from the control device. In this case, the flap 2 and the bridge girder 1 are connected to each other via rubber plates 3 (flexible member). Two rubber plates 3 are used so as to clamp the fairing 1a of the bridge girder 1 and the flap 2, both ends of each plate 3 being fixed by with an adhesive.

6. 发明专利

JPH11229321A STRESS AND DEFORMATION RESTRAINING METHOD FOR STIFFENING GIRDER, STIFFENING GIRDER AND SUSPENSION BRIDGE 失效
公开(公告)号：JPH11229321A
公开(公告)日：1999-08-24
申请号：JP4855198
申请日：1998-02-16
申请人： NIPPON KOKAN KK
发明人： MURAKAMI TAKUYA , TAKAO MICHIAKI , INOMURA YASUHIRO , SATO TAKESHI
IPC分类号： E01D1/00 , E01D2/00 , E01D11/00 , E01D11/02 , E01D101/00
摘要： PROBLEM TO BE SOLVED: To restrain deformation by providing a designated joint member between stiffening girder blocks dividing a stiffening girder in the axial direction, and separating the blocks from each other at the time of a rainstorm. SOLUTION: Plural stiffening girder blocks 3a, 3b,... are connected to each other in the axial direction of a bridge through a joint member 10. The joint member 10 is formed by conical projected bracket 11a and a recessed bracket 11b which are provided on the end parts of the blocks 3a, 3b in such a manner as to be fitted to each other, a PC cable 12 held in the brackets 11a, 11b, and springs 13 respectively interposed between the end parts of the cable 12 and the brackets 11a, 11b, thereby pulling the blocks 3a, 3b against each other not to be separated except the time of a rainstorm. As the joints 10 are separated from each other at the time of a rainstorm, the deformation of the blocks 3a, 3b... is limited to the deformation caused by wind load applied to the blocks 3a, 3b, and large stress is not applied. Thus, the stiffening girder can be proof against deformation without any increase in the section of the girder structural member.

7. 发明专利

JPH11190006A DAMPING METHOD OF BRIDGE AND DAMPING BRIDGE 失效
公开(公告)号：JPH11190006A
公开(公告)日：1999-07-13
申请号：JP36663597
申请日：1997-12-26
申请人： NIPPON KOKAN KK
发明人： SATO TAKESHI , MURAKAMI TAKUYA , KATO SHINJI , TAKAO MICHIAKI
IPC分类号： E01D1/00 , E01D2/00 , E01D11/00 , E01D11/02 , E01D101/00
摘要： PROBLEM TO BE SOLVED: To install a damping device even in a narrow space while reducing the construction period and cost and securely damp a bridge by dividing a bridge girder into bridge girder blocks having an appropriate length in the axial direction of the bridge and depressing the vibration of the girders by dampers installed between blocks. SOLUTION: Dampers made of highly attenuating rubber are installed at both outsides of a bridge girder 6 and adjacent bridge girder blocks 1 are connected together through the damper. In this time, a damping action caused by the dampers is easily obtained by the FEM eigen value analysis on the basis of the viscous attenuation of a single damper and the number of installed dampers. The dampers effectively function even when a relatively warped displacement or a tortional displacement has arisen and attenuates the bridge girders 6. When the bridge girders 6 vibrates by wind, the girders 6 are restricted by both main towers and the displacement of the bridge girder 6 is small at the vicinity of the main towers and maximal in the vicinity of the central part of the span. In this way, many days are not required for development and design and the bridge is securely attenuated by the installed dampers and further the dampers can be installed even in a narrow space.

8. 发明专利

JPH11158996A TRIANGULAR TRUSS 失效
公开(公告)号：JPH11158996A
公开(公告)日：1999-06-15
申请号：JP33948297
申请日：1997-11-26
申请人： NIPPON KOKAN KK
发明人： SATO TAKESHI , MIHARA YUTAKA , TAKEDA KATSUAKI
IPC分类号： E04B1/19 , E01D1/00 , E01D6/00 , E01D19/00 , E01D101/30 , E04C3/08
摘要： PROBLEM TO BE SOLVED: To simplify welding work and facilitate welding of studs by making a chord member being an upper chord and a lower chord to be a pentagonal steel pipe having a cross section of a pentagon. SOLUTION: The triangular truss comprises two upper chords 1 positioned under a floor board F and extending in the direction of a bridge axis, one lower chord 2 and an oblique material 3 connected to the upper chord 1 and the lower chord 2 to be applied to a triangular bridge. The upper chord 1 and the lower chord 2 are a pentagonal steel pipe, the same shape is made in the whole cross section to display a right and left symmetrically pentagon. Since the upper chord 1 and the lower chord 2 are the cross section pentagon, the beveling of the oblique material 3 makes a shape abutting on the same plane. Therefore, the beveling can be simplified. In addition, welding work can be simplified. Therefor welding defects can be reduced. In addition, since the welding face of studs can be made a plane, welding studding can be performed. Thus, execution of a triangular truss is improved, a construction period is shortened and elimination or reduction of labor can be contrived.

9. 发明专利

JPH10168815A CABLE DAMPING DEVICE 失效
公开(公告)号：JPH10168815A
公开(公告)日：1998-06-23
申请号：JP32576896
申请日：1996-12-05
申请人： NIPPON KOKAN KK
发明人： SATO TAKESHI , TSUMURA NAOYOSHI
IPC分类号： E01D1/00 , E01D11/00 , E01D11/04 , E01D19/16 , E01D101/00
摘要： PROBLEM TO BE SOLVED: To restrain vibration of the cable for a cable stayed bridge or the like. SOLUTION: This cable damping device is composed of a damper 3, which produces damping force by utilizing the viscosity resistance of an electroviscous fluid 3a whose viscosity changes by the impressed voltage, a vibration sensor 4 for detecting the cable 2 vibration, and a control device 7 which determines the impressed voltage and impresses voltage to the electroviscous fluid 3a. It determines the impressed voltage for the electroviscous fluid 3a based on a signal from the vibration sensor 4 detecting the cable 2 vibration and impresses between an outward facing flange 3b and an inward facing flange 3c. Thus viscosity of the electroviscous fluid 3a changes and coincides with the optimum coefficient of vicosity of the cable vibration being produced at that time.

10. 发明专利

JPH10325109A MECHANISM FOR PREVENTING FLUTTER OF BRIDGE GIRDER 失效
公开(公告)号：JPH10325109A
公开(公告)日：1998-12-08
申请号：JP13678497
申请日：1997-05-27
申请人： NIPPON KOKAN KK
发明人： TAKEDA KATSUAKI , SATO TAKESHI
IPC分类号： E01D1/00 , E01D2/00 , E01D11/00 , E01D11/02 , E01D11/04
摘要： PROBLEM TO BE SOLVED: To prevent flutter without blocking the field or view and without increasing drag in the airflow direction by installing flat plates in such a way that they are a predetermined distance away from a floor plate located at the cross center of a bridge girder or from its lower surface and that they are appropriately parallel to each other. SOLUTION: A flutter-prevention device 5 placed horizontally along a bridge girder 1 at the center of the bridge girder, at a predetermined distance from a floor plate, comprises flat plates 7, 9 which can be rotated about the center of the bridge girder along their axes, a driving unit 11 imparting random rotation to the flat plates 7, 9 via a link mechanism, and a control plate 17. On a shaft member installed between columns 21 erected at a predetermined interval along the axis of the bridge girder 1, the flat plates 7, 9 are installed in such a way that they are rotatable about the center of the shaft member. If a high wind that may exceed a flutter-causing wind speed is expected to blow in the perpendicular direction to the axis of the bridge girder 1, a signal is transmitted by the control plate 17 to the driving unit 11 to rotate the flat plates 7, 9. If a separating vortex generated at the front edge of the bridge girder 1 flows down and comes to the center of the bridge girder 1, the vertically rotating flat plates 7, 9 disturb and weaken the separating vortex, preventing flutter.

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