| 李静,陈健云,徐强,纪林强.高拱坝抗震性能评价指标研究[J].水利学报,2015,46(1): |
| 高拱坝抗震性能评价指标研究 |
| Study on index of seismic performance evaluation of arch dam |
| |
| DOI： |
| 中文关键词: 拱坝 地震动 评价指标 非线性 安全评估 |
| 英文关键词: arch dam earthquake evaluation index nonlinear safety evaluation |
| 基金项目: |
|
| 摘要点击次数: 3639 |
| 全文下载次数: 34 |
| 中文摘要: |
| 随着高海拔、高寒、高烈度地震区水电工程的建设，基于强度的拱坝抗震安全评价标准已无法满足工程实践的需要。本文采用非线性数值分析模型对拱坝进行了地震动IDA（逐步动力增量分析）研究，提出了评价大坝抗震安全性新指标，即：坝体损伤体积比和坝面损伤面积比；结合实际工程分析了地震峰值加速度与坝体位移、坝体损伤体积比和坝面损伤面积比之间的关系。结果表明，相比于已有的拱坝抗震性能评价指标，所提出的坝体损伤体积比和坝面损伤面积比指标，可以更清晰地反映出不同强度地震动作用下的拱坝损伤变化趋势和抗震承载能力，更适合作为评价拱坝抗震性能的指标。 |
| 英文摘要: |
| The index based concrete strength for seismic safety evaluation of arch dam has become difficult to meet the requirements of hydropower project construction in high altitude，alpine and high intensity earthquake region. The IDA（Incremental Dynamic Analysis） was performed to study the nonlinear seismic behavior of arch dam. Two new seismic safety evaluation indices of damage area ratio and damage volume ratio were proposed and the correlations of these two indices and dynamic displacements at different part of arch dam with seismic peak acceleration were analyzed. The results show that the proposed damage area ratio and damage volume ratio can reflect the damage evolution trend with earthquake intensities and the seismic bearing capacity more obviously than previous index and more suitable for arch dam seismic safety evaluation. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |