STUDY ON UNIAXIAL COMPRESSION CONSTITUTIVE MODELS OF ADOBE MASONRY

Through the soil test of earth material and the uniaxial compression test of mud cubes, adobe and adobe masonry, engineering properties of earth material and the uniaxial compression stress-strain relationship of adobe masonry are analyzed. The equation between the elastic modulus and compressive strength of mud cube, adobe and adobe masonry has been established, and the simplified calculation formula of compressive strength of adobe masonry is proposed. Based on damages and statistical strength theory with the Weibull distribution, and using characteristic points of stress-strain curve, the damage fixed statistical constitutive model has been established, and the damage fixed statistical constitutive model is validated by comparing with the experimental data. It is shown that, before the peak stress, the results from the proposed damage corrected statistical constitutive model coincides with the experimental data very well, and beyond the peak stress, the results calculated by the model less than the results obtained with experiment. The results provides for a reference for researching the seismic behaviors of adobe masonry buildings.