基于有限元法的闸室抗震安全评价

发布时间：2018-05-03 17:37

  本文选题：水闸 + 有限元方法　； 参考：《水利水电技术》2017年03期

【摘要】：由于我国建设初期的水闸工程设计经验有限,未充分考虑到闸室抗震的实际需要,设计标准偏低,需要进行抗震安全复核。以某水闸为例,由于其初设时未考虑抗震因素,但水闸位于地震基本烈度Ⅷ度区,运用有限元软件ANSYS建立模拟水闸基础及上部结构的三维模型,采用模态分析反应谱法进行了地震动力计算分析。结果表明:地震荷载作用下闸室最大沉降为31.43 mm,闸底板平均沉降26.18 mm,处于安全范围之内;地基土层最大沉降变形集中发生于闸室地板边缘向下、土层Ⅰ、土层Ⅱ、土层Ⅲ上部,土层Ⅱ部分沉降变形30 mm左右,在8级地震下有可能发生液化。闸室最大压应力为0.465 MPa,最大拉应力为-76.76 k Pa,满足规范要求。闸室抗滑稳定性不满足要求,地震条件下闸室带阻滑板抗滑稳定安全系数为0.944,不带阻滑板抗滑稳定安全系数为0.708,均小于允许抗滑稳定安全系数1.05的要求,建议闸室拆除重建。
[Abstract]:Due to the limited design experience of sluice engineering in the early stage of construction in our country, the actual needs of seismic resistance of the lock chamber are not fully considered, and the design standard is on the low side, so it is necessary to carry out seismic safety review. Taking a sluice as an example, because the seismic factors were not taken into account when the sluice was first set up, but the sluice is located in the region of the basic earthquake intensity 鈪，

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