Seismic Behavior And Nonlinear Finite Element Analysis Of High-Strength Concrete Short Columns

Focusing on the high-strength concrete (HSC) short columns in the large scale thermal power plant, testing research and reasoning analysis have been done in this paper. Through the contrastive analysis of tests' datum, seismic performance of HSC short columns under high axial compression ratio is questioned systematically, and on the basis, nonlinear finite element analysis(NFEA) on seismic performance of HSC short columns under uniaxial loading is done with ANSYS. In this thesis, the further cognition about them is presented, and the influence on them by reason of the section character, the form and the "f_yv" of hoops are discussed. At the same time, some experiences of ANSYS application concerning HSC short columns are summarized. Now, some conclusions are listed as following:1. The choice of primary parameter and σ-ε relationship of HSC is very different from normal-strength concrete, so, great attention should be shown.2. Too higher strength hoop hasn't much more signification affection on the improvement of seismic performance of HSC short columns.3. The scope of the positive effection of " V_n " and " V_s " on the shear strength of HSC short columns can be broadened properly on the basis of specifications.4. Through the NFEA with ANSYS, the HSC short columns with higher ratio of h and b maybe haven't more significant fragility as square ones.5. The thickness of cover has important affection on the conclusion of tests.6. Although the NFEA of HSC short columns with ANSYS hasn't enough accuracy, it shows good tendency with the test, so, the program can be used as a good preprocessor in the scientific tests about HSC pieces, and it has a better workability than some other proper methods. Thus, the accuracy and the purpose of tests will be improved and the cost will be saved.