Development of Damage-based Structural Performance Evaluation Framework for RC Members

为了实现三个目标;（1）建立钢筋混凝土构件的损伤评估方法，（2）建立钢筋混凝土构件结构性能评估的数值分析程序，（3）对修复和/或加固材料的力学性能进行实验和分析验证，本研究从2005年至2007年进行了三个财年的研究工作，取得了以下成果：1）进行了钢筋混凝土柱的重力荷载倒塌试验，并应用图像处理技术和数字化记录钢筋混凝土柱的破坏过程图像，测量了裂缝宽度和变形。这些数据有助于将裂缝宽度与柱的变形联系起来。此外，剩余的抗震性能的柱在测量裂缝宽度的评估程序开发。因此，如果能够测量受损柱的残余裂缝宽度，就有可能估计残余裂缝宽度和最大裂缝宽度。 ...更多信息 变形，这导致剩余抗震性能的简单评估。对各种钢筋混凝土构件进行了三维非线性有限元分析，研究了偏心距对构件扭转性能的影响，建立了评价构件性能的数值分析模型。此外，还研究了构件的结构性能对整体结构性能的影响，包括非结构构件和扭转的影响。3）对灌浆材料的力学性能进行了试验验证。以钢支撑加固法为例进行了研究。制作了模拟抗震加固节点的试件，进行了混凝土与砂浆、砂浆与钢框架之间的剪切滑移性能试验研究。建立了该节点的数值分析模型。少

In order to accomplish three objectives ; (1) establishment of the damage evaluation method in RC members, (2) establishment of the numerical analysis procedure for evaluating structural performance of RC members, and (3) experimental and analytical verification of the mechanical performance in repair and/or retrofitting materials, the research effort over three fiscal years from 2005 to 2007 was made and the following were obtained :1) The gravity load collapse test of RC columns was carried out, and crack widths and deformations were measured by applying the image processing as well as the digital recording of failure process images in RC column. These data were useful to relate crack widths to deformation of the column. Furthermore, the procedure for evaluating the residual seismic performance of the column in terms of measured crack widths was developed. Thus, if residual crack widths of the damaged column could be measured, it becomes possible to estimate the residual and maximum … More deformations, and this leads to an easy assessment of the residual seismic performance. Further research is needed to apply the developed method to the column failing in shear.2) The 3-D nonlinear finite element analyses on various RC components were carried out as well as the investigation of the torsional behavior due to eccentricities, and the numerical analysis model for evaluating the structural performance was developed. Furthermore, the effect of the structural performance of components on behavior of the overall structure, including the effect of the nonstructural components and the torsion, were studied.3) The mechanical properties of the grout to be used as the repair and/or retrofitting materials were experimentally verified. As an example, the strengthening method by the steel bracing was selected as the target of study. The specimens, which model the seismic strengthening connection, were made, and the shear sliding behavior between concrete and grout or between grout and steel frame was experimentally investigated. Furthermore, the numerical analysis model for the connection was developed. Less