Compression field theory for structural concrete subjected to flexure and shear

Abstract

In structural design, a rational model enables the engineer to develop a better understanding of actual structural behaviour and leads to simple general methods of design. For structural members subjected to structural actions involving shear, such a model is absent.In this thesis, a rationalmoeel called the compression field theory is applied to the case of structuralconcrete subjectedto ccmb.inedflexure and shear. The ccmpression field theory is a recently developed method of analysis which involves a consideration of equilibrium compatibility and the stress-strain characteristics of the concrete and the reinforcing steel. The thesis shows how the complete response of a given section under flexure and shear can be predicted using the equations developed from the compression field theory. A program has also been written to enable a computer aided solution.Further to the theoretical predictions, the thesis also presents a test programme in which experimental data is collected in order to verify the trends established from the theoretical model. A comparative study is then carried out between the theoreticaf- and experimental trends to assess the capability of the model. It is established that within the as sumpt.Lorsof the theoretical model and the I.•' limitations of the experimental program, the trends predicted by the compression field theory model and those from the laboratory test data are in good agreement.