The Application of Steel-bonded Strengthening Technology in Enhancing the Carrying Capacity of Existing Bridges

Chengbi River Bridge and Yongle Bridge, originally designed as rigid framed bridges for truck load 20 and trailer load 100 tons, are now in defective conditions with a lot of crackings. In need of transporting oversized and heavy members (with total weight of 4 252 kN), the strengthening technology with bonded stecl plates are used to enhance their carrying capacity to large extent. This paper mainly introduce the design and constraction technology of the bonded steel strengthening method.