Study Of Fundamental Characteristics Of Plastic Concrete Under Cyclic Loading

Based on the related research results at home and abroad,the experiment designed ten groups of mixture ratio,then we casted cylinder and prism,there are 247 specimens,which size is ?×H = 150mm×300mm,B×B×H =100mm×100mm×100mm and 100mm×150mm× 300 mm,in the end we carry out the tests of single loading and cyclic loading.The experiment study on the strength of plastic concrete under different load,specimen failure process,the characteristics of stress strain curve and other mechanical properties,and we get the rule of the strength of plastic concrete under the different mixing ratio,the different specimen shape and the changing,sum up out the damage phenomenon of plastic concrete;Based on the constitutive model of ordinary concrete,plastic concrete,and the soil,we fully consider the characteristics of uniaxial state.Then We use numerical simulation method to test the different model,and get the Boltzmann model of the rising period,the Logistic model of the decline,which can react the characteristics of the unconfined compression process under uniaxial stress strain.By using the exponential function model,we fit the curves of loading and unloading,which can react thecharacteristics of curve of stress-strain of circulation process.