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《Journal of Seismology》 2003-02
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Experimental Study on Dynamic Shear Modulus Ratio and Damping Ratio of the Soils of Bohai Seafloor

LU Yue-jun, TANG Rong-yu, SHA Hai-jun (Institute of Crustal Dynamics, China Seismological Bureau, Beijing 100085, China)  
The dynamic shear modulus ratio and damping ratio of soil are indispensability for seismic safety evaluation and soil layer seismic response analysis of engineering sites. In this paper, using the apparatus and method of stress-controlled cyclic triaxial test, an experimental study on dynamic shear modulus ratio and damping ratio for the soils of Bohai seafloor is performed. The test apparatus is HX100 cyclic triaxial test system. The soil samples, including clay, silty clay, fine sand, silty sand, silty fine sand, sampled from QK18-2, BZ13-1 and BZ26-2 oilfields of Bohai sea. The relations of G/Gmax-γ and λ-γ are fitted by two hyperbolic equations, and the curves and recommended values of G/Gmax-γ and λ-γ for each soil are obtained. These results have been used in the seismic safety evaluation of these oil platforms and also have an important reference for other engineering constructions in the sea area. Furthermore, the results of the paper can provide the related basic data and work method for a future seismic zoning of Chinese sea area.
【Fund】: 美国PHILPI石油公司和中国海洋石油公司委托项目(RFPNo.0003)
【CateGory Index】: P315.9
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