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为分析某枢纽工程中混凝土进水塔结构在塔背回填条件下的静动力响应,根据已知条件和合理计算假定建立三维有限元计算模型;对塔体在不同工况条件下采取振型分解反应谱法进行静力和动力计算,分析塔体混凝土结构变形与应力的大小和规律;并对塔体在塔背有无回填两种情况下进行静动力特性比较,以此来研究塔背回填对塔体静动力响应的影响程度。结果表明,良好的塔背回填可以对进水塔塔背形成有效的约束,对增加结构整体的稳定、减少变形和增强抗震性能有重要作用。
In order to analyze the static and dynamic response of concrete infill tower under backfilling conditions in a pivotal project, a three-dimensional finite element model is established according to known conditions and reasonable calculation assumptions. For the tower under different working conditions, the vibration mode decomposition Response spectrum method to calculate the static and dynamic loads and analyze the size and the regularity of the deformation and stress of the concrete structure of the tower body. The static and dynamic characteristics of the tower body under the condition of whether the back of the tower body is backfilled are compared, Influence on the static and dynamic response of the tower body. The results show that a good backfilling can form an effective constraint on the tower bottom, which plays an important role in increasing the overall structural stability, reducing deformation and enhancing seismic performance.