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以小湾拱坝泄洪中孔预应力闸墩为例,采用复合形法对混凝土蠕变试验资料进行拟合并得到了朱伯芳-阿鲁久仰模型公式的参数,应用有限单元方法和子模型技术相结合的方法对闸墩进行了精细模拟分析,研究了运行期闸门推力作用下的闸墩牛腿变形、应力以及预应力索等的蠕变效应及时程规律,结果表明闸墩结构不会开裂,也不会影响闸门的正常开启,最后还提出了运行管理建议.研究结果为小湾工程提供了参考,对其他类似工程也具有借鉴意义.
Taking Xiaowan arch dam spillway prestressed pier for an example, the complex shape method was used to fit the creep test data of concrete and the parameters of Zhu Bofang-Alujian model were obtained. The finite element method and the sub-model technique were combined , The creep effect and the time-history law of pier deformation, stress and prestressing cable under the action of gate thrust are studied. The results show that the pier structure will not crack and It will not affect the normal opening of the gate, and finally put forward the operation and management suggestions.The results of the study provide a reference for the Xiaowan project, also have reference for other similar projects.