Method for reinforcing seismic capability of existing moment frames buildings of reinforced concrete

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The present invention relates to a method for reinforcing strength by enlarging the section of the structural member of an existing reinforced concrete building and, more particularly, to a seismic retrofit method for an existing reinforced concrete moment frame building, which can improve seismic performance by integrating a steel plate concrete composite reinforcing member with the structural member of an existing reinforced concrete moment frame building, particularly with the structural member of a rectangular school building to enhance the strength and stiffness of the existing reinforced concrete moment frame building. According to an appropriate embodiment of the present invention, the seismic retrofit method for an existing reinforced concrete moment frame building by section enlargement comprises the steps of : roughening the exposed surface of a structural member to be reinforced in an existing reinforced concrete moment frame building; fixing a connection member, which includes a pair of longitudinal members installed in parallel along the axis of the structural member to be reinforced with a predetermined gap therebetween and a plurality of transverse members installed in parallel in the direction perpendicular to the longitudinal members with a predetermined gap therebetween to connect the pair of longitudinal members, to the roughened exposed surface of the structural member to be reinforced along the axis of the structural member to be reinforced; coupling a permanent form, which has a U-shaped cross section, to the connection member to cover the exposed surface of the structural member to be reinforced while forming a filler casting space between the permanent form and the exposed surface of the structural member to be reinforced; and casting a filler in the filler casting space between the permanent form and the exposed surface of the structural member to be reinforced.COPYRIGHT KIPO 2014