Quantitative Evaluation of Deterioration on Capacity and Ductility of RC Structural Members under Plastic Region Using Three-Dimensional FEM Analysis

考虑循环加载历史和加载速率对三维钢筋混凝土构件力学性能的影响，编制了钢筋混凝土结构构件在循环大变形作用下的高精度有限元分析程序。通过对分析结果的详细研究，了解了钢筋混凝土构件承载力和延性劣化的机理和定量评估方法，得到了以下研究成果：1)研究了钢筋混凝土构件承载力劣化的机理；2)分析了承载力劣化对钢筋混凝土构件结构性能的影响。为了合理评价钢筋混凝土构件的结构性能，有必要定量地了解未来地震作用下钢筋混凝土构件的结构性能劣化。3)结构构件的承载能力劣化对RC…抗震性能的影响对更多的建筑进行了研究。考虑能力劣化对钢筋混凝土构件结构性能的定量影响，对钢筋混凝土结构进行地震反应分析是十分必要的。在这种情况下，利用PC和超级计算机的协同工作，对部分钢筋混凝土结构进行微观有限元分析是可能的，也是一种尝试。此外，整理了以下几个方面的结果：1)塑性区多向荷载作用下钢筋混凝土结构构件承载能力超标劣化的主要因素的参数分析，3)地震作用下钢筋混凝土结构构件性能退化的定量评估综述；4)利用报告和WWW在互联网上发布钢筋混凝土结构构件变形性能试验和分析定量评估的研究成果。较少

Considering the influence of cyclic loading histories and loading rates on mechanical properties of three-dimensional RC elements, the high-precision FEM analytical program for RC structural members subjected to cyclic large deformation was developed. From detailed investigations of analytical results, mechanisms and quantitative evaluation of deterioration on capacity and ductility of RC structural members were understood The following research results may be obtained in this study :1)Mechanisms of deterioration on capacity of RC structural members were investigated.2)Influences of capacity deterioration on structural performance of RC members analytically were discussed. In order to rationally evaluate structural performance of RC members, it is necessary to quantitatively understand deterioration of structural performance of RC members subjected to cyclic loadings at an earthquake in the future.3)Influences of capacity deterioration of structural members on seismic performance of RC … More buildings were studied. It is necessary to carry out seismic response analysis of RC buildings considering quantitative effects of capacity deterioration on structural performance of RC members. In that case, it was possible and tried to solve some RC buildings with micro FEM analysis using cooperation of PC and super computer.Furthermore, the results of following items were arranged.1)Parametric analysis of main factors on excessive capacity deterioration of RC structural members subjected to multi-directional loadings under plastic region, and discussion of that preventing techniques.2)Understanding of progressive deterioration process of RC members subjected to simultaneous three-directional loading including cyclic arc motions at an earthquake.3)Summary of quantitative evaluation on performance deterioration of RC structural members subjected to reversed cyclic loadings at an earthquake.4)Publication of research results regarding to experimental and analytical quantitative evaluation of deformation performance of RC structural members using a report and WWW on Internet. Less