院报 ›› 2018, Vol. 35 ›› Issue (11): 112-116.DOI: 10.11988/ckyyb.20170331

• 水工结构与材料 • 上一篇    下一篇

坝后式水电站厂房不同支座方案减震对比研究

景月岭, 王洋洋   

  1. 合肥工业大学 土木与水利工程学院, 合肥 230009
  • 收稿日期:2017-03-07 修回日期:2017-06-07 出版日期:2018-11-01 发布日期:2018-11-16
  • 通讯作者: 王洋洋(1994-),男,浙江绍兴人,硕士研究生,主要从事水工结构抗震研究。E-mail:846225854@qq.com
  • 作者简介:景月岭(1983-),男,河南兰考人,讲师,博士,主要从事水工结构抗震研究。E?mail:jing@hfut.edu.cn
  • 基金资助:
    国家自然科学基金项目(51409074); 中国博士后科学基金项目(2014M550341); 中央高校基本科研业务费专项(JZ2014HGQC0118,2013HGBH0052); 合肥工业大学博士学位专项(JZ2014HGBZ0022)

Comparative Study of Different Bearing Solutions on Shock Absorption of Power Station at Dam Toe

JING Yue-ling, WANG Yang-yang   

  1. School of Civil Engineering,Hefei University of Technology,Hefei 230009,China
  • Received:2017-03-07 Revised:2017-06-07 Online:2018-11-01 Published:2018-11-16

摘要: 通过建立某坝后式水电站主体结构的三维有限元模型,包括大坝、基础、坝后式厂房、厂房顶网架和支座简化模型,对比分析了在地震作用下带锚栓的板式橡胶支座、铅芯橡胶支座和铰支座3个方案对厂房上部结构的减震影响。研究结果表明:铰支座方案自振周期最短,支座节点的地震响应最大,其中厂房上、下游侧节点对最大层间位移比铅芯橡胶支座方案分别高31.74%和44.5%;铅芯橡胶支座方案由于具有较好的吸能效果,在地震作用下其本身适应剪切变形能力强,能很好地释放支座处支反力,厂房上、下游排架柱的第一主应力也是3个方案中最小的。由此可得,坝后式水电站厂房铅芯橡胶支座为推荐的支座选型方案。

关键词: 带锚栓的板式橡胶支座, 铅芯橡胶支座, 铰支座, 坝后式厂房, 有限元法, 减震影响

Abstract: A three-dimension finite element model of a power station at dam toe is built in this paper. The main structures include dam, foundation, powerhouse at dam toe, roof net, and simplified bearing model. Three kinds of bearings, namely, laminated rubber bearing supported with anchor bolt, lead rubber bearing, and hinge support, are compared to find their influence on the upper structure under earthquake action. Result reveals that hinge support is unfavorable for seismic reduction with the shortest natural vibration period and the largest seismic response; also, the maximum displacement of node pairs on the upstream and downstream side of powerhouse are higher than that in the case of lead rubber bearing by 31.74% and 44.5%, respectively. Lead rubber bearing has good ability of releasing support force under earthquake due to good energy absorption effect and better adaptation to shear deformation; moreover, the first principal stress of node pairs on upstream and downstream side of the powerhouse under earthquake is the lowest among the three cases. In conclusion, the lead rubber bearing is recommended.

Key words: laminated rubber bearing supported with anchor bolt, lead rubber bearing, hinge support, power station at dam toe, finite element method, seismic alleviation

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