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首页> 外文会议>International Structural Engineering and Construction Conference(ISEC-03); 20050920-23; Shunan(JP) >Numerical analysis for extension behavior of fracture cracks in reinforced concrete members
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Numerical analysis for extension behavior of fracture cracks in reinforced concrete members

机译：钢筋混凝土构件断裂裂缝扩展行为的数值分析

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摘要

Cracks in reinforced concrete show an interesting behavior for its deformation and extension by the steel constraint. The four point bending member was chosen as the model of this study and the properties of extension and deformation for cracks in the reinforced concrete specimen were investigated. Considering the bending crack and the inclined crack in the specimen, the crack extension property by using the maximum energy release rate criterion is discussed. The position of crack, the angle of crack inclination, some ratios of shear span to effective depth, etc. were considered as the parameter of the analytical models and the energy release rate was calculated for each crack by the E-integral method. The numerical results gave the various interesting behavior for crack extension properties of the bending crack and the inclined crack with the various ratios of shear span to effective depth. As one example, it becomes clear that there are two areas which either the energy release rate of shear crack or of bending crack is dominant.
机译：钢筋混凝土中的裂缝表现出一种有趣的行为，即受钢约束变形和扩展。本研究以四点弯曲构件为模型，研究了钢筋混凝土试件裂缝的扩展和变形特性。考虑到试样的弯曲裂纹和倾斜裂纹，采用最大能量释放率准则讨论了裂纹扩展特性。裂纹的位置，裂纹的倾斜角度，剪切跨度与有效深度的比率等均作为分析模型的参数，并通过E积分方法计算出每个裂纹的能量释放率。数值结果给出了不同剪切跨度与有效深度之比的弯曲裂纹和倾斜裂纹扩展特性的有趣表现。作为一个例子，很明显，存在两个区域，其中剪切裂纹或弯曲裂纹的能量释放速率是主要的。

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