The assessment of corrosion-damaged concrete structures

T Technology > TG Bridge engineering

Webster, Michael Peter ; Clark 1944-, L. A. (Leslie Arthur),Somerville, George

University:University of Birmingham

Department:School of Engineering, Department of Civil Engineering

关键词: T Technology;    TG Bridge engineering;   

Others  :  http://etheses.bham.ac.uk//id/eprint/259/3/Webster00PhD.pdf

来源: University of Birmingham eTheses Repository

【 摘 要 】

Data from existing research are linked together to produce an overview of the effects of chloride-induced corrosion on reinforced concrete structures. The effects of chloride-induced corrosion on the following mechanisms have been investigated: (i) Cracking. (ii) Bond strength. (iii) Flexural strength. (iv) Shear strength. (v) Column behaviour. Models have been developed to link material and structural aspects of deterioration. Despite the complexity of the behaviour, many of the models are modifications to existing procedures contained in UK codes. Material and structural models are integrated together in a spreadsheet for assessing the variation in load-carrying capacity with time. Time to cracking and residual load-carrying capacity are found to be sensitive to small variations in key parameters such as the cover and the surface chloride level. Predictions from a spreadsheet model indicate that structures designed and built to BS 8110 should achieve their design life without the need for significant repair. The predictions also indicate that the UK Highways Agency was justified in making BD 57 more onerous than BS 5400. With validation against further test data the procedures developed in this Thesis could form the basis for codes of practice for the assessment of corrosion-damaged concrete structures and the durability design of new concrete structures.