整体式碾压混凝土重力坝预裂缝的效应与分析

Analysis of effect of precrack in roller compacted concrete gravity dam

为防止温度裂缝 ,在整体式碾压混凝土重力坝中预设裂缝 ,采用空间有限元法计算具有预裂缝的整体式碾压混凝土重力坝的应力和位移 ,分析预裂缝对坝体应力场和位移场的影响 ,在有限元法计算中考虑碾压混凝土薄弱面的影响 ,将坝体材料作为正交各向异性材料 ,采用相当弹性模量。对预裂缝问题提出合理建议。

Man made precracks in roller compacted concrete gravity dam can prevent the thermal crack. The stress and displacement in roller compacted concrete gravity dam are calculated using three dimension finite element method to analyze the effect of precrack for stress field and displacement field in dam. The dam is treated as orthotropic materials by considering the effect of layer using corresponding elastic moduli. The reasonable suggestion to solve the problem of precrack is presented.