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，开发了循环大变形钢筋混凝土结构构件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RC结构构件承载力和延性劣化的机理和定量评价。本研究可以得到以下研究成果：1）研究了RC结构构件承载力劣化的机理。2）分析讨论了承载力劣化对RC构件结构性能的影响。为了合理评价RC构件的结构性能，有必要定量了解未来地震循环荷载作用下RC构件的结构性能劣化情况。3)研究了结构构件承载力劣化对RC建筑抗震性能的影响。有必要对钢筋混凝土建筑进行地震响应分析，考虑容量恶化对钢筋混凝土构件结构性能的定量影响。在这种情况下，尝试利用PC与超级计算机的配合，对一些RC建筑进行微观有限元分析，并进行了尝试。此外，还得到了以下结果：1）塑性区域下多向荷载作用下RC结构构件承载能力过度劣化的主要因素参数化分析，并讨论了预防技术。2）地震时循环弧运动等三向荷载作用下RC构件渐进劣化过程的认识。3）性能定量评价总结地震时RC结构构件在反向循环荷载作用下的劣化。4)利用报告和WWW在互联网上发表关于RC结构构件变形性能的实验和分析定量评估的研究成果。较少的

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