A total of six full-scale high strength reinforced concrete (HSRC) columns were tested under axial and cyclic lateral loading. The specified concrete compressive strength was 70 MPa and the specified yield strength was 685 MPa and 785 MPa for the longitudinal and transverse reinforcements, respectively. The main variables considered in the study are the transverse reinforcements ratio and axial load ratio. Although such HSRC columns have gradually transformed in use and scope, the damage assessment method is less understood. The main purpose of this study is to propose a damage assessment model for HSRC columns. An analytical backbone curve model for predicting force–deformation behavior of HSRC columns is described. Column stiffness is also measured from the experiment to obtain stiffness reduction factors that are necessary to calculate member deformation. Based on experiment results, a new limiting value of residual crack width is defined to determine damage level. This study uses specified residual crack width of 0.15 mm, 0.30 mm, and 1.00 mm in the damage assessment model. The new limiting value of residual crack width is also used to determine the performance points of structural members. Finally, a new drift ratio limit of each damage level is also proposed. Experiment results are presented and used to investigate the application of the proposed damage assessment model.

中文翻译：

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具有弯曲-剪切和剪切破坏模式的 HSRC 柱的力-裂纹量化模型的试验研究

总共六个全尺寸高强度钢筋混凝土 (HSRC) 柱在轴向和循环横向载荷下进行了测试。规定的混凝土抗压强度为 70 MPa，纵向和横向钢筋的规定屈服强度分别为 685 MPa 和 785 MPa。研究中考虑的主要变量是横向配筋率和轴向载荷比。虽然这样的HSRC柱在用途和范围上已经逐渐转变，但对损坏评估方法却知之甚少。本研究的主要目的是提出一种 HSRC 柱的损伤评估模型。描述了用于预测 HSRC 柱的力-变形行为的分析主干曲线模型。柱刚度也从实验中测量，以获得计算构件变形所需的刚度折减系数。根据实验结果，定义了一个新的残余裂纹宽度极限值来确定损伤程度。本研究在损伤评估模型中使用指定的残余裂纹宽度 0.15 毫米、0.30 毫米和 1.00 毫米。残余裂纹宽度的新极限值也用于确定结构构件的性能点。最后，还提出了每个损坏级别的新漂移比限制。实验结果被提出并用于研究所提出的损害评估模型的应用。30 mm 和 1.00 mm 在损坏评估模型中。残余裂纹宽度的新极限值也用于确定结构构件的性能点。最后，还提出了每个损坏级别的新漂移比限制。实验结果被提出并用于研究所提出的损害评估模型的应用。30 mm 和 1.00 mm 在损坏评估模型中。残余裂纹宽度的新极限值也用于确定结构构件的性能点。最后，还提出了每个损坏级别的新漂移比限制。实验结果被提出并用于研究所提出的损害评估模型的应用。