THE ANALYSIS ON MECHANICS PERFORMANCE OF CFRP LAMINA REINFORCE IN MULTI-FUNCTION BRIDGE UNDER HIGH TEMPERATURE ENVIRONMENT

摘要

The length of Bangabandhu bridge in Bangladesh is 4 800 m, which is a cross section of continuous box girder multi-function bridge, with the highway, railway and power line transiting it. In the influence of the frequent drought and tropical cyclone such as various climate disaster, as the surface temperature stress which lead to the Bangabandhu bridge deck appear longitudinal crack. Grouting epoxy resin on the Bangabandhu bridge is made after the restoration, the preliminary design for the bridge deck crack is to coat with CFRP lamina in transverse in order to constraint the longitudinal cracks development. It is made level up layer, waterproofing, insulating layer and 5 cm thick Matrix Asphalt (SMA) with a wear protection layer and providing corrosion resistant layer. It is the first time so large area CFRP lamina pasted on bridge panel and the construction of Matrix Asphalt layer in the world. In order to research the rationality of the design scheme and durability of new part after reinforcement of CFRP lamina on multifunction box girder-bridge under the environment of high temperature. The effective simulating test is made to study the mechanics performance of CFRP lamina reinforcement on multi-function box girder-bridge under the environment of high temperature according to the design scheme.