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A method for reinforcing a railcar bodyshell according to the present invention includes the steps of: in a bodyshell including a metal frame and a metal plate joined to the frame and formed such that a cross section orthogonal to a railcar longitudinal direction has a wave shape, disposing a fiber

A method for reinforcing a railcar bodyshell according to the present invention includes the steps of: in a bodyshell including a metal frame and a metal plate joined to the frame and formed such that a cross section orthogonal to a railcar longitudinal direction has a wave shape, disposing a fiber sheet on at least a part of the plate; and forming a fiber reinforced resin member by bonding the fiber sheet to the part of the plate by an impregnated adhesive resin.

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1. A method for reinforcing a railcar bodyshell, comprising the steps of: providing a bodyshell, the bodyshell having a metal frame and a metal plate joined to the metal frame, the metal plate being formed such that a cross section thereof that is orthogonal to a longitudinal direction of a railcar

1. A method for reinforcing a railcar bodyshell, comprising the steps of: providing a bodyshell, the bodyshell having a metal frame and a metal plate joined to the metal frame, the metal plate being formed such that a cross section thereof that is orthogonal to a longitudinal direction of a railcar has a wave shape;disposing a fiber sheet on at least a part of the metal plate; andforming a fiber reinforced resin member by bonding the fiber sheet to the at least part of the metal plate by an impregnated adhesive resin, wherein before the step of disposing the fiber sheet, an opening is formed by removing a portion surrounding a crack on the part of the metal plate, and the opening is closed by a closing plate; andin the step of disposing the fiber sheet, the fiber sheet is disposed so as to cover the closing plate and a portion around the closing plate. 2. A method for reinforcing a railcar bodyshell, comprising the steps of: providing a bodyshell, the bodyshell having a metal frame and a metal plate joined to the metal frame, the metal plate being formed such that a cross section thereof that is orthogonal to a longitudinal direction of a railcar has a wave shape;disposing a fiber sheet on at least a part of the metal plate; andforming a fiber reinforced resin member by bonding the fiber sheet to the at least part of the metal plate by an impregnated adhesive resin, wherein the metal plate is formed to be smaller in thickness than the fiber reinforced resin member;the metal plate is welded to the frame by spot welding; andin the step of disposing the fiber sheet, a plurality of fiber sheets are disposed so as to spread all over the at least part of the metal plate, and end portions, opposed to each other in the longitudinal direction of the railcar, of the plurality of fiber sheets are arranged such that a space is formed therebetween and just above a portion welded by the spot welding. 3. A method for reinforcing a railcar bodyshell, comprising the steps of: providing a bodyshell, the bodyshell having a metal frame and a metal plate joined to the metal frame, the metal plate being formed such that a cross section thereof that is orthogonal to a longitudinal direction of a railcar has a wave shape;disposing a fiber sheet on at least a part of the metal plate; andforming a fiber reinforced resin member by bonding the fiber sheet to the at least part of the metal plate by an impregnated adhesive resin, wherein in the step of disposing the fiber sheet, a plurality of fiber sheets are disposed so as to spread all over the part of the metal plate;each of the plurality of fiber sheets has a rectangular shape in plan view; andin the step of disposing the fiber sheet, opposing end portions of adjacent fiber sheets among the plurality of fiber sheets are located at a mountain portion of the wave shape of the metal plate. 4. The method according to claim 3, wherein end portions, opposed to each other in a railcar width direction, of the adjacent fiber sheets are joined so as to overlap each other. 5. A method for reinforcing a railcar bodyshell, comprising the steps of: providing a bodyshell, the bodyshell having a metal frame and a metal plate joined to the metal frame, the metal plate being formed such that a cross section thereof that is orthogonal to a longitudinal direction of a railcar has a wave shape;disposing a fiber sheet on at least a part of the metal plate; andforming a fiber reinforced resin member by bonding the fiber sheet to the at least part of the metal plate by an impregnated adhesive resin, wherein the metal plate is a roof board;in the step of disposing the fiber sheet, the fiber sheet is disposed so as to cover both a front end portion of the roof board and an upper end portion of an end bodyshell, the front end portion of the roof board overlapping and being joined to a part of the upper end portion of the end bodyshell; andin the step of forming the fiber reinforced resin member, the fiber sheet is bonded by an impregnated adhesive resin to both the front end portion of the roof board and the upper end portion of the end bodyshell. 6. A method for reinforcing a railcar bodyshell, comprising the steps of: providing a bodyshell, the bodyshell having a metal frame and a metal plate joined to the metal frame, the metal plate being formed such that a cross section thereof that is orthogonal to a longitudinal direction of a railcar has a wave shape;disposing a fiber sheet on at least a part of the metal plate; andforming a fiber reinforced resin member by bonding the fiber sheet to the at least part of the metal plate by an impregnated adhesive resin, wherein the metal plate is formed to be smaller in thickness than the fiber reinforced resin member;the metal plate is a floor panel;a carbon fiber reinforced resin member is formed by bonding the fiber sheet to an end portion of the floor panel; andthe end portion of the floor panel is welded by fillet welding to a side surface of a rear end member joined to an upper surface of an end beam of an underframe and extending in a railcar width direction.