Experimental Investigation on the Use of Advanced Composites High-strength Adhesives in Repair of Steel Structures

摘要

This paper presents the resutls a pilot study on the use of polymer composites and high-strength adhesives for structural repair of damaged steel frame connections. Several full-scale steel interior connections were tested under cyclic load to generate information on the energy dissipation capabilities of the different proposed repair techniques. The primary repair system developed in this study is in the form of a 3-D braided graphite/epoxy composite connectors attached to the flanges of both beams and columns. Two composite repair details were investigated; i) high-strength/high-toughness adhesively bonded composite stiffeners, and ii) mechanically fastened composite stiffeners. The results of the different repaie specimens were compared to those obtained from the "as-buil" welded connection specimens. In addition, initial results of an on-going linear and non-linear numerical analysis study on the seismic performance of these repair details on the seismic performance of these repair details are reported.