A New Parameter to Evaluate Liquefaction Resistance of Saturated Sand under Complex Dynamic Stress Paths

Abstract:

Foundations are often subjected to complex dynamic stresses which result from ocean wave, vehicle or seismic loads. In this paper, four series of tests under different dynamic stress paths were carried out on Fujian standard sand with hollow cylinder apparatus, to investigate its liquefaction resistance. Test results showed different strength of specimens under different dynamic stress paths, when using the traditional evaluation index: maximum cyclic shear stress. A concept named as load efficiency (E) was proposed in this paper, which is defined as definite integral of dynamic shear stress on time in a single cycle. E is a new parameter to characterize liquefaction resistance of non-cohesive soil, attempting to normalize the effect of different shear modes, in which the shear stresses are constant or change periodically under different dynamic stress paths. Test results showed that in the isotropic consolidation condition, the relationship between E and failure cycle N_f is nearly linear in the dual-log coordinate.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 378-385
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.378
• Online since: September 2013
• Authors: Bo Huang, Xing Yao Chen, Qing Jing Wang, Dao Sheng Ling
• Keywords: Complex Dynamic Stress Paths, Hollow Cylinder Apparatus, Liquefaction Resistance, Load Efficiency

References

[1] Ishihara K and A Yamazaki: Soils and Foundations. Vol. 24-3(1984), p.85.

[2] Ishihara K and Towhata K: Soils and Foundations. Vol. 23-4(1983), p.26.

[3] Arthur J R F, Chua K S Dunstan T and Rodriguez D C: Journal of the Geotechnical Engineering Division, Proc. ASCE, 1980, 106(GT4), p.419.

[4] Symes M J, Gens A and Hight D W: Geotechnique. Vol. 34-1(1984), p.11.

[5] Changjing Wang and Yunmin Chen: Chinese journal of rock mechanics and engineering (In Chinese). Vol. 26(2007), p.1698.

[6] Seed B and Lee K L: Journal of Soil Mechanics & Foundations Div. Vol. 92-6(1966), p.105.

[7] Towhata I and Ishihara K: Soils and foundations. Vol. 25-2(1985), p.135.

[8] Ishihara K: Soil behaviour in earthquake geotechnics (Clarendon Press, Oxford 1996).

[9] K.T. Law Y.L. Cao and G.N. He: Canadian geotechnial journal. Vol. 27-3(1990), p.320.

[10] Sooil Kim and Keunbo Park: KSCE Journal of Civil Engineering. Vol. 12-1(2008), p.15.

[11] Ludwig Figueroa, Adel.S. Saada, Liqun Liang and Nitin M. Dahisaria: J. Geotech. Engrg. Vol. 120(1994), p.1554.

DOI: 10.1061/(asce)0733-9410(1996)122:3(244.x)

[12] Yang Shen, Jun Yan, Pengju Zhang and Zhongqiu Fei: Rock and Soil Mechanics(In Chinsese), Vol. 32-1(2011), p.118.

[13] D W Hight, A Gens and M J Symes: Geotechnique, Vol. 33(1983), p.355.

[14] Ying Guo, Maotian Luan, Yang He and Chengshun Xu: Chinese Journal of Gentechnical Engineering(In Chinese), Vol. 27-4(2005), p.403.