Study on the load earring capability of pre-cracked R/C members

在超静定钢筋结构中，由于混凝土收缩、温度变化等恶劣条件引起的纵向拉应力引起的裂缝较多。本文报道了预裂钢筋混凝土构件性能的试验和分析研究结果。试验结果表明，由于初始裂纹的存在，许多构件的抗剪强度都有所提高。上述结果发表于CSSCE（2001）和CONSEC（2001）。在数值研究中，采用两种有限元（等参数壳单元和三维实体单元）对预裂钢筋混凝土构件进行了响应分析。采用基于三维实体单元的有限元方法对钢筋混凝土桥墩修复工艺进行了响应分析。这些结果发表在DRRDAG（2000）、APCSSS（2000）和CSSCE（2001）上。

In statically indeterminate reinforced structures, there are many cracks caused by longitudinal tensile stress such as shrinkage of concrete, temperature change and other severe conditions. This paper reports the results of the experimental and/or analytical study on the capability of pre-cracked reinforced concrete members.The experimental results showed that many members increase the shear strength due to the initial crack. The above results were presented at CSSCE(2001) and CONSEC(2001).In the numerical study, two kinds of finite element (the isoparametoric shell elements and three dimensional solid elements) was used for the response analysis of the pre-cracked reinforced concrete member. Also, the response analyzes for repair techniques of reinforced concrete pier were carried out using the FEM based on the three dimensional solid element.These results were presented at DRRDAG(2000), APCSSS(2000), and CSSCE(2001).