全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
工程力学  2014 

基于拱梁分载法的高薄拱坝水平拱圈曲折稳定评价

DOI: 10.6052/j.issn.1000-4750.2012.12.0948, PP. 145-150

Keywords: 高薄拱坝,曲折,稳定分析,柔度系数,深拱

Full-Text   Cite this paper   Add to My Lib

Abstract:

该文针对深山峡谷中高拱坝半径较小且截面尺寸较大,曲率和剪切变形对临界荷载的影响较为明显的特点,基于大曲率深拱问题在拱坝中应用的理论和经典的拱梁分载理论,对《拱坝抗曲折稳定分析再探》中的算例重新校核,重新定义拱坝水平拱圈的抗曲折稳定系数,并结合柔度系数绘制两者关系曲线,更直观的判定水平拱圈的稳定性。结果表明:对于拱坝的中上部,拱圈起主要承载作用,拱圈的稳定性较弱,曲率和剪切变形的影响不明显,容易发生失稳,故在校核稳定时应当给予重视;对于中下部,拱圈的稳定性较强,但剪切与曲率的影响较为明显,并且剪切变形的影响大于曲率的影响;高拱坝的柔度系数越大则拱圈曲折失稳范围越大,柔度系数为10时坝高全范围拱圈将不曲折失稳。

References

[1]  夏桂云, 李传习, 曾庆元. 大曲率圆弧深拱平面弹性稳定分析[J]. 工程力学, 2008, 25(1): 145-149. Xia Guiyun, Li Chuanxi, Zeng Qingyuan. In-plane elastic buckling analysis of circular arch considering influences of curvature and shear deformation [J]. Engineering Mechanics, 2008, 25(1): 145-149. (in Chinese)
[2]  Lombardi G, Kohlbrein Dam. An unusual solution for an unusual problem [J]. Water Power and Dam Construction, 1991, 6(43): 31-34.
[3]  朱伯芳. 混凝土拱坝的应力水平系数与安全水平系数[J]. 水利水电技术, 2000, 31(8): 1-3. Zhu Bofang. Stress level coefficient and safety level factor of concrete arch dam [J]. Water Resources and Hydropower Engineering, 2000, 31(8):1-3. (in Chinese)
[4]  Timosheko S P, Gere J M. Theory of elastic stability [M]. New York: McGraw-Hill Book Company Inc, 1961: 278-313.
[5]  林继镛. 水工建筑物[M]. 北京: 中国水利水电出版社, 2008: 168-173. Lin Jiyong. Hydraulic structure [M]. Beijing: Water Conservancy and Electric Power Press, 2008: 168-173. (in Chinese)
[6]  刘华丽, 彭辉. 基于多拱梁分载法的高拱坝应力分析[J]. 云南水力发电, 2009, 25(3): 26-29. Liu Huali, Peng Hui. The multiple arch-cantilever safety-base high arch dam stress analysis [J]. Yunnan Water Power. 2009, 25(3): 26-29. (in Chinese)
[7]  汝乃华, 姜忠胜. 大坝事故与安全[M]. 北京: 中国水利水电出版社, 1995: 53-57. Ru Naihua, Jiang Zhongsheng. Arch dams accident and safety of large dams [M]. Beijing: Water Conservancy and Electric Power Press, 1995: 53-57. (in Chinese)
[8]  姚栓喜, 李蒲健. 黄河拉西瓦双曲拱坝体型优化设计[C]. 昆明: 水电2006国际研讨会论文集, 2006: 194-205. Yao Shuanxi, Li Pujian. Optimization design of double-curvature arch dam body in laxiwa yellow river [C]. Kunming: International Symposium on Hydroelectric Power in 2006, 2006: 194-205. (in Chinese)
[9]  周秋景, 张国新. 拱坝极限承载力影响因素及安全评价体系研究[C]. 上海: 第三届全国水工岩石力学学术会议论文集, 2010: 353-356. Zhou Qiujing, Zhang Guoxin. Studies on arch dam of factors affecting the ultimate bearing capacity and safety assessment system [C]. Shanghai: The Third National Academic Conference on Hydraulic Engineering Rock Mechanics Symposium, 2010: 353-356. (in Chinese)
[10]  黄岩松, 周维垣, 杨若琼, 沈大利. 拉西瓦拱坝稳定性分析和评价[J]. 岩石力学与工程学报, 2006, 25(5): 901-905. Huang Yansong, Zhou Weiyuan, Yang Ruoqiong, Shen Dali. Stability analysis and evaluation of laxiwa arch dam [J]. Chinese Journal of Rock Mechanics and Engineering, 2006, 25(5): 901-905. (in Chinese)
[11]  黄岩松, 周维垣, 陈新. 拉西瓦双曲拱坝整体稳定分析[J]. 岩石力学和工程学报, 2002, 21(2): 2413-2417. Huang Yansong, Zhou Weiyuan, Chen Xin. Analysis on stability in the large of laxiwa hyperbolic arch dam [J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(2): 2413-2417. (in Chinese)
[12]  姚栓喜, 李蒲健, 雷丽萍. 拉西瓦水电站混凝土双曲拱坝设计[J]. 水力发电, 2007, 33(11): 30-33. Yao Shuanxi, Li Pujian, Lei Liping. Desing of double curvature arch dam of the laxiwa hydroelectric project [J]. Journal of Hydroelectric Engineering, 2007, 33(11): 30-33. (in Chinese)
[13]  李瓒, 陈飞, 郑健波. 特高拱坝枢纽分析与重点问题研究[M]. 北京: 中国电力出版社, 2004: 57-71, 103-147, 612-638. Li Zan, Chen Fei, Zheng Jianbo. Analysis and studies on project and major technical issues of surper-high arch dams [M]. Beijing: China Electric Power Press, 2004: 57-71, 103-147, 612-638. (in Chinese)
[14]  任青文, 王伯乐. 关于拱坝柔度系数的讨论[J]. 河海大学学报(自然科学版), 2003, 31(1): 1-4. Ren Qingwen, Wang Bole. Discussion on slenderness coefficient of arch dams [J]. Journal of Hohai University(Natural Sciences), 2003, 31(1): 1-4. (in Chinese)
[15]  范钦珊, 薛克宗, 王波. 工程力学教程[M]. 北京: 高等教育出版社, 1998: 329-333. Fan Qinshan, Xue Kezong, Wang Bo. Tutorial of engineering mechanics [M]. Beijing: Higher Education Press, 1998: 329-333. (in Chinese)
[16]  DL/T 5346, 混凝土拱坝设计规范[S]. 2006.9. DL/T 5346, Specifications of concrete arch dam design [S]. 2006.9. (in Chinese)
[17]  黄文熙. 拱坝抗屈折稳定初探[J]. 水利学报, 1995, 9(9): 1-4. Huang Wenxi. Preliminary studies on the stability of arch dam against elastic buckling [J]. Journal of Hydraulic Engineering, 1995, 9(9): 1-4. (in Chinese)
[18]  王正中, 刘计良. 拱坝抗曲折稳定再探[J]. 工程力学, 2010, 27(6): 147-153. Wang Zhengzhong, Liu Jiliang. Further discussions on the stability of arch dam against elastic buckling [J]. Engineering Mechanics, 2010, 27(6): 147-153. (in Chinese)

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133