[특허]Method for externally reinforcing girders

Method for externally reinforcing girders 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	E04C-005/08
출원번호	US-0385462 (1995-02-08)
우선권정보	MX-0001088 (1994-02-11)
발명자 / 주소	Siller-Franco Jose Luis (Miguel Angel 78 Col. Mixcoac Mexico D.F. MXX 03910 )
인용정보	피인용 횟수 : 27 인용 특허 : 0

초록 ▼

The load bearing capacity of girders, particularly those already installed in bridges, may be increased by providing, on each face of the girder, an external reinforcement which comprises a tension member divided into three stretches, namely a first stretch extending downwardly from the upper corner of the web adjacent the upper flange at one end of the girder and a first point of the lower edge of the lower flange of the girder at a predetermined distance from said one end a second stretch extending horizontally from said first point to a second point of the lower edge of the lower flange of the girder at a predetermined distance from the opposite end of the girder, and a third stretch extending upwardly from said second point to the upper corner of the web adjacent the upper flange at the opposite end of the girder, connecting the ends of said tension member stretches exclusively by means of friction forces to the girder, and either simultaneously or independently tensing said tension member stretches in order to provide an increased strength of the girder to bending stresses and/or shearing stresses.

대표청구항 ▼

A method of externally reinforcing a girder for increasing the load bearing capacity thereof, said girder comprising first and second ends, a web, an upper or compression flange, and a lower or tension flange, each of said web and said flanges having first and second opposing faces such that said girder has first and second opposing faces, said method comprising the steps of: attaching exclusively by friction forces to each one of said faces of said web at said first end of said girder a first upper friction connector below said upper flange and extending in a downward direction towards a center of the length of the girder; attaching exclusively by friction forces to each one of said faces of said web at said second end of said girder a second upper friction connector below said upper flange and extending in a downward direction towards the center of the length of the girder; attaching exclusively by friction forces to each one of said faces of said lower flange first and second lower friction connectors, said first lower friction connector being collinearly arranged with respect to said first upper friction connector, said second lower friction connector being collinearly arranged with respect to said second upper friction connector, and said first and second lower friction connectors being collinearly arranged with and spaced apart from each other; passing a tension member through said first upper friction connector, said first lower friction connector, said second lower friction connector, and said second upper friction connector on each face of said girder, thereby forming a first tension member stretch extending in a downwardly inclined direction between said first upper friction connector and said first lower friction connector, a second tension member stretch extending in a horizontal direction between said first and second lower friction connectors, and a third tension member stretch extending in an upwardly inclined direction between said second lower friction connector and said second upper friction connector; and tensioning at least one of said tension member stretches sufficiently to transmit, exclusively by means of friction forces, the required forces to said girder in order to increase the load bearing capacity thereof; wherein said steps of attaching exclusively by friction forces to each one of said faces of said web first and second upper friction connectors and first and second lower friction connectors include the steps of sufficiently pressing said friction connectors on said first face of said girder against said first face of said girder and sufficiently pressing said friction connectors on said second face of said girder against said second face of said girder to cause the vertical forces maintaining said friction connectors in place against said faces of said girder to be provided exclusively by friction.

이 특허를 인용한 특허 (27)

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Keller, Thomas, Method for reinforcement of concreted plates in the region of support elements.
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Nieto, Jean-Francois; Tourneur, Christian, Method for strengthening a structure and associated anchorage unit.
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Nieto, Jean-Francois; Tourneur, Christian, Method for strengthening a structure and associated anchorage unit.
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Nacey Richard B. ; Adams Eldon E., Tendon alignment assembly and method for externally reinforcing a load bearing beam.
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Pellicer, Carlos Fradera, Tensioning installation for the frameworks of pre-tensioned architectural elements.
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Andr��,Hans Peter; K��nig,Gert; Maier,Markus, Tie anchor for a strip-type tension member.
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