APPLICATION OF NEWMARK DISPLACEMENT ANALYSIS TO EISMIC STABILITY EVALUATION OF SUBMARINE SLOPE
-
摘要:
Newmark地震动力时程分析方法能够考虑自然地震波峰值地面加速度(PGA)、持续时间、地震频率的影响，可以输入不同地震波进行模拟计算，计算了曹妃甸典型海底边坡在发生类似唐山地震的烈度情况下动力响应，得出的位移值大小可以定量的反映地震对场地边坡的影响，根据海底斜坡或坡顶建筑物的允许位移值，可以将其作为安全稳定分析的判断指标，可以为类似边坡稳定性评价、近海工程建设等提供重要的参考作用。
Abstract:Using the Newmark method for seismic time history analysis, we can put into account the effects of natural seismic peak ground acceleration (PGA), duration, and seismic frequency on seabed slopes, and different seismic waves can be input for simulation. In this paper, we calculated the dynamic response of a typical seabed slope as the Caofeidian to an earthquake similar to the Tangshan earthquake in scale. It is concluded that the value of displacement value can be used to quantitatively describe the influence of the earthquake on the slope. Therefore, the allowable displacement value of submarine slope and buildings on it can be used as a marker in security and stability analysis, which may provide important reference for slope stability evaluation and offshore construction.
-
Key words:
- earthquake /
- submarine slope /
- stability /
- Newmark /
- displacement
-
-
表 1 土层基本力学特性参数
Table 1. The indices of soil physical and mechanical properties
层号 土名 重度γ/(kN/m3) 泊松比 黏聚力c′/(kPa) 摩擦角φ′/(°) ① 粉细砂
淤泥质18.4 0.38 6 28 ②-1 粉质
黏土17.2 0.4 8 10.8 ②-2 粉细砂
粉质19.1 0.35 9 33.4 ③ 粉质
黏土19.5 0.35 23.1 27.2 ④-1 粉土 20.1 0.36 17.8 28.6 ④-2 亚砂土 19.4 0.33 11 35 ⑤ 粉细砂 19.6 0.34 12 36 ⑥ 亚黏土 21.3 0.30 24.2 27.2 
下载: 导出CSV
-
[1] Abramson L W, Lee T S, Sharma S, et al. Slope Stability and Stabilization Methods[M]. 2nd edition. Hoboken, NJ:John Wiley & Sons, 2001.
[2] Anderson D G, Martin G R, Seismic analysis and design of retaining walls, buried structures, slopes, and embankments (NCHRP REPORT 611)[R].Washington D C:Transportation research board, 2008.
[3] 陈祖煜.土质边坡稳定分析方法、原理、程序[M].北京:水利水电出版社, 2003.
[4] 史慧杰, 禇宏宪, 高小惠.海底斜坡稳定性研究进展及分析[J].海洋地质前沿, 2013, 29(3):44-45. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=hydzdt201303007
[5] Houston S L, Houston W N, Padilla J M. Microcomputer-aided evaluation of earthquake-induced pemmanent slope displacements[J]. Microcomputers in Civil Engineering, 1987, 2(3):207-222. doi:10.1111/j.1467-8667.1987.tb00147.x
[6] 禇宏宪, 方中华, 史慧杰, 等.海曹妃甸海底深槽斜坡稳定性分析与评价[J].海洋工程, 2016, 34(3):114-122. doi: 10.16483/j.issn.1005-9865.2016.03.013
[7] 李承亮, 冯春, 刘晓宇.拟静力方法适用范围及地震力计算[J].济南大学学报:自然科学版, 2011, 25(4):431-436. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=sdjcxy201104023
[8] 刘立平, 雷尊宇, 周富春.地震边坡稳定分析方法综述[J].重庆交通学院学报, 2001, 20(3):83-88. doi: 10.3969/j.issn.1674-0696.2001.03.022
[9] 徐光兴, 姚令侃, 李朝红, 等.边坡地震动力响应规律及地震动参数影响研究[J].岩土工程学报, 2008, 30(6):918-923. doi: 10.3321/j.issn:1000-4548.2008.06.022
[10] 方中华, 褚宏宪.波浪作用下曹妃甸深槽斜坡稳定性分析[J].海洋地质前沿, 2015, 31(11):29-35. doi: 10.16028/j.1009-2722.2015.11005
[11] Hynes-Griffin M E, Franklin A G. Rationalizing the seismic coefficient method[R]. Army Engineer Waterways Experiment Station, Vicksburg, Mississippi, 1984.
[12] Wieczorek G F, Wilson R C, Harp E L. Map showing slope stability during earthquakes in san mateo county, Califomiar[R].U.S. Geological Survey, 1985.
[13] Keefer D K, XWilson E L. Prediciting earthquake-induced landslides, with emphasis on arid and semi-arid environments[C]//Proceedings of Landslides in a Semiarid Environment on the Inland Valleys of Southern California. Inland Geological Society, Riverside, CA (USA), 1989, 2: 118-149.
[14] Jibson R W, Keefer D K. Analysis of the seismic origin of landslides:examplesfrom the new madrid seismic zone[J].Geologicalsociety of America Bulletin, 1993, 21(4):521-536. doi: 10.1130/0016-7606(1993)1052.3.CO;2
-
图(8)
表(1)
计量
- 文章访问数: 980
- PDF下载数: 91
- 施引文献: 0